CN101854105B - Single-phase self-starting permanent magnet synchronous motor - Google Patents
Single-phase self-starting permanent magnet synchronous motor Download PDFInfo
- Publication number
- CN101854105B CN101854105B CN2009102471376A CN200910247137A CN101854105B CN 101854105 B CN101854105 B CN 101854105B CN 2009102471376 A CN2009102471376 A CN 2009102471376A CN 200910247137 A CN200910247137 A CN 200910247137A CN 101854105 B CN101854105 B CN 101854105B
- Authority
- CN
- China
- Prior art keywords
- stator
- arc
- air gap
- permanent magnet
- magnetic pole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The invention relates to a single-phase self-starting permanent magnet synchronous motor, which belongs to the field of micromotors, is used as a driving motor of a mini-type water pump, a cooling system of a vehicle engine and a driving motor of a warm air system circulating pump, and can also be used in other aspects. The invention aims to improve the starting performance and the operational performance, and is characterized in that the single-phase self-starting permanent magnet synchronous motor is provided with two protruding stator magnetic poles, the pole arc of the magnetic pole at each side consists of four sections, wherein the first section has the maximum length and minimum air gap length, the second section has the maximum air gap length and is at the point of a pole shoe centerline, the air gap length of the third section is gradually reduced, the length of the fourth section is smaller than or equal to 1/2 of that of the first section, and the air gap length of the fourth section is minimum.
Description
Technical field
The invention relates to a kind of single-phase self-starting permanent magnet synchronous motor; Belong to the electrical micro-machine field; Can be used as the drive motors of water pumps such as washing machine, dishwasher, also can be used as the drive motors of the electronic equipment liquid cooling system circulating pump such as drive motors, computer of automotive engine cooling system and warm air system circulating pump, also can be used for others.
Background technology
This motor is the special construction motor that proposed in the 1970's, adopts the p-m rotor and the U-iron heart, and relies on special non-uniform gap to realize starting.
The rotor of this motor is a p-m rotor, adopts ferrite permanent-magnet materials to make usually.Because ferrite permanent-magnet materials has good stainless property; Can be at the medium-term and long-term steady operation of liquid such as water, so when being used as the drive motors of micropump (centrifugal pump, axial-flow pump or mixed-flow pump), normally p-m rotor also is arranged in the pump case; Impeller through the coaxial construction direct-driven pump; Saved the movable sealing of pump shaft, therefore pump and motor also can be made into one, and compact appearance, structure are greatly simplified, performance significantly improves.The typical application of obvious this motor is as drive motors of micropump etc.
This motor can be divided into two types in (synchronously outer) single-phase self-starting permanent magnet synchronous motor (single phase self-starting permanent magnet synchronous motor) and brushless single phase direct current machine (single phase brushless DC motor or BLDC motor) by the difference of power supply, and these two types of motors also use different titles in different applications and different document.When directly using alternating current or using the inverter power supply; Belong to single-phase self-starting permanent magnet synchronous motor; In this application; Different documents also uses like U-iron heart single-phase self-starting permanent magnet synchronous motor (U-shaped core single phase self-starting permanent magnet synchronous motor), phase line starting and permanent magnet synchronous machine (single phase line start permanent magnet synchronous motor), single-phase permanent motor different titles such as (single phase permanent magnet motor); As above-mentioned, this type motor is generally used for the drive motors of micropump.Maturation along with rotor position detection technology and electronic commutation technology; This motor also can use direct current; Belong to the motor synchronizing single-phase self-starting permanent magnet synchronous motor in fact; But be commonly referred to the brushless single phase direct current machine; But also have document to use and above-mentioned (synchronously outer) title that single-phase self-starting permanent magnet synchronous motor is identical, this type motor can be used as the drive motors of equipment liquid cooling system circulating water pump such as the drive motors, computer of automotive engine cooling system and warm air system circulating pump etc. (the computer cooling fan motor also belongs to this class, but different be computer cooling fan motor employing outer-rotor structure).(synchronously outer) single-phase self-starting permanent magnet synchronous motor is simple in structure, better performances such as starting of brushless single phase direct current machine and speed governing.The present invention is referred to as single-phase self-starting permanent magnet synchronous motor to these two types of motors.
Outside the difference of above-mentioned power supply or the method for synchronization (synchronously, motor synchronizing), the structure of single-phase self-starting permanent magnet synchronous motor itself is identical basically, and have simple in structure, with low cost, efficient is higher, the advantage of dependable performance and long service life.Along with electronics inversion transformation technique and electronic commutation development of technology, and the continuous appearance of novel (integrated) chip for driving (device); This motor properties is constantly improved; Application is also more extensive; In the electrical micro-machine scope, have to replace conventional condenser or single-phase asynchronous induction machine of shaded-pole and the various prospect that the brush direct current machine is arranged gradually.
This motor is made up of p-m rotor, stator core and stator winding; Its known configurations is, adopts inner rotor core, and p-m rotor is the cylindrical magnet rotor that magnetizes of the two poles of the earth radially; Radially; In the p-m rotor outside is the stator that is made up of U-shaped stator core and stator winding, and there are two relative magnetic pole of the stator (pole shoe) end of U-shaped stator core, and the magnetic pole of the stator inboard is two relative polar arcs; Constitute air gap between polar arc and p-m rotor; Every side pole arc is not strict circular arc, forming the so-called non-uniform gap (asymmetric air gap) that gas length does not wait in magnetic pole of the stator center line both sides, and general this non-uniform gap or constitute by two sections radius different arcs shapes or arc polar arc; Be called the stairstepping non-uniform gap; But the polar arc shape of both sides magnetic pole of the stator and formed non-uniform gap thereof are generally about p-m rotor axis symmetry, and such non-uniform gap magnetic pole of the stator that (before powering up) can make p-m rotor when static state is with respect to the certain angle of direction deflection that the magnetic pole of the stator center line is little to gas length, magnetic resistance is little, i.e. formation is called the deflection angle of starting the angle; Starting angle big more starting torque is just big more, and such design makes this motor can self-starting.Present this motor all adopts such non-uniform gap to realize starting.
Because it is more complicated than induction machine to the analysis of magneto; And the magnetic pole of the stator structure of comparing this motor with other magneto is more special; Make analysis and research become difficult to this motor; Its starting principle, operation logic and performance etc. are lacked careful research and deep understanding; Is for example starting the angle how to influence starting? How to pull in? Starting and pull in and how the vibration synchronously the time produces? There is prejudice in prior art to the understanding of these problems, as thinks that the stairstepping non-uniform gap can form bigger starting angle; As think that the existence of starting the angle can obtain enough electromagnetic torques motor is pulled in rapidly, and ignored of the effect of p-m rotor hysteresis characteristic to pulling in; Think that and for example vibration is that inhomogeneities by reluctance torque causes, and ignored the influence of inhomogeneities of the electromagnetic torque of a main influence.
Obviously, this motor properties mainly receives the influence of its stator structure, magnetic pole of the stator structure and polar arc shape bigger, and prior art also lacks careful research and deep understanding to these, also has prejudice aspect some.
The prejudice of prior art on principle and structural research and understanding; Make prior art in stator core structure, magnetic pole of the stator structure and designs such as polar arc shape and formed gas length thereof, unreasonable part arranged, make prior art also have following defective aspect starting performance and the runnability:
1, polar arc shape on every side magnetic pole of the stator and corresponding gas length relative stator pole center line thereof have bigger asymmetry; The starting angle when though the such design of observation can strengthen static state on the surface; But when powering up starting; Because the influence of asymmetric gas length, on the magnetic pole of the stator centerline direction that the direction of the exciting field that stator winding produces at the air gap place not it has been generally acknowledged that, equally also can be with respect to the certain angle of direction deflection that the magnetic pole of the stator center line is little to gas length, magnetic resistance is little; Actual starting angle is reduced, and starting torque reduces, starting performance is relatively poor.
2, (with magnetic pole of the stator center line vertical direction) is two bigger breach that do not have iron core between magnetic pole of the stator, receives the restriction of this special construction, and reluctance torque obviously is uneven.When powering up operation; The exciting field that stator winding produces is the impulsive magnetic field that acts between magnetic pole of the stator; Simply by the dual rotary theory with this impulsive magnetic field be decomposed into two in opposite directions, uniformly rotating magnetic field is a prejudice in 360 ° of scopes, because do not have iron core in indentation, there, has great magnetic resistance; So the rotating magnetic field after decomposing is seriously uneven in 360 ° of scopes; It also is uneven making electromagnetic torque, reluctance torque and electromagnetic torque inhomogeneous make this motor itself just have operation not steadily, vibration and the bigger defective of noise, prior art has strengthened this defective to the design of magnetic pole of the stator shape and polar arc shape.
3, simultaneously; Because the recoil permeability very little (magnetic resistance is very big) of permanent magnetic material such as ferrite, and during as the drive motors of micropump, owing to will there be the sealing shroud of isolating usefulness (to constitute the part of water pump cover between p-m rotor and the magnetic pole of the stator; P-m rotor is in pump case; Stator is outside pump case), make the air gap (distance between p-m rotor and magnetic pole of the stator) of this motor bigger, so the leakage field of this motor is bigger.Prior art is not fully recognized that this point; Thereby on the structural design of stator core defectiveness; Mainly be that magnetic pole of the stator does not protrude, make distance and magnetic resistance except that between two U-shaped arms of the stator core the magnetic pole of the stator part less than normal relatively, make the leakage field of stator core bigger; The loss of electric machine particularly stray loss etc. is bigger, and combination properties such as electric efficiency reduce.
4, stator core also need not be a U-shaped, and some situation is fit to use ring-shaped core, and ring-shaped core is more reasonable at aspects such as technologies.
Summary of the invention
The objective of the invention is to propose a kind of single-phase self-starting permanent magnet synchronous motor, can solve the above-mentioned defective of prior art preferably, the starting performance of this motor is improved, the property improvement that operates steadily, loss reduces, and combination properties such as electric efficiency improve.
Apparatus of the present invention are to realize through such technical scheme:
This motor is made up of p-m rotor, stator core and stator winding, and to adopt inner rotor core, p-m rotor be the cylindrical magnet rotor that magnetizes of the two poles of the earth radially; Radially, be the stator that constitutes by stator core and stator winding in the p-m rotor outside, it is characterized in that; Stator has two magnetic pole of the stator (pole shoe) relative and protrusion, and the distance between the magnetic pole of the stator of both sides is shortened relatively, and every side pole arc is formed by four sections from an end to the other end; First section polar arc is circular arc type, and its arc length is maximum in four sections polar arcs, constitutes the even air gap that gas length equates; And its gas length is the air gap minimum value, the position since an end, be extended down near the magnetic pole of the stator center line, second section polar arc is camber or approximate camber; Constitute even or approximate uniform air gap, and with respect to other three sections polar arcs, its gas length reaches the air gap maximum; The position be preceding join with first section polar arc and cross the magnetic pole of the stator center line after join with the 3rd section polar arc; The 3rd section polar arc is camber or the approximate arc that radius reduces gradually, constitute the air gap that gas length reduces gradually, and its gas length is less than the air gap maximum, greater than the air gap minimum value; The position be precedingly join with second section polar arc, back and the 4th section polar arc join; The 4th section polar arc also is circular arc type, and arc length also constitutes the even air gap that gas length equates smaller or equal to the arc length 1/2nd of first section polar arc; And its gas length is also identical with the gas length of first section polar arc, also be the air gap minimum value, the position be precedingly join with the 3rd section polar arc, after be extended down to the other end of every side pole arc.
Motor of the present invention also has following technical characterictic.
The polar arc shape of both sides magnetic pole of the stator and formed non-uniform gap thereof are about p-m rotor axis symmetry;
P-m rotor is processed by whole permanent magnet or is processed by several permanent magnets;
And permanent magnet adopts bonding, sintering or permanent magnetic material is mixed in resin or the plastics with injection, extrudes or the manufacturing of thermosetting technology mode;
Stator core is the stator core of U-shaped or the stator core of annular; Stator core to U-shaped; Stator winding is installed on two arms of stator core, and two ends that grow the stator core of stator winding are two relative magnetic pole of the stator, to the stator core of annular; The magnetic pole of the stator that two relative protrusions are arranged on the annular stator core, stator winding are installed on the magnetic pole of the stator;
Stator core adopts silicon steel plate or low carbon steel plate with the laminar manufacturing, or adopts mealiness soft magnetic material such as iron powder to make;
Stator winding is centralized winding, and stator winding is made up of a stator winding, or is made up of two stator winding.
The operation principle of apparatus of the present invention is:
Pull in principle, and synchronous operation principle of starting of explanation (synchronously outer) single-phase self-starting permanent magnet synchronous motor and acceleration at first.
According to the present invention; Magnetic pole of the stator (pole shoe) protrudes from the medial surface of two arms, has relatively strengthened the distance and the leakage reluctance that remove the magnetic pole of the stator exterior portions, relatively; Reduced the magnetic resistance of the main magnetic circuit that constitutes by stator core, air gap, p-m rotor; Thereby reduced leakage field, improved the magnetic field intensity at air gap place, the present invention can make performances such as electric efficiency and moment of torsion improve.According to the present invention; The reducing of the 4th section polar arc place air gap and magnetic resistance, and the polar arc shape and the air gap shape of every side have symmetry preferably with respect to the magnetic pole of the stator center line; Total magnetic resistance at air gap place is reduced, magnetic field intensity improves, and also makes performances raisings such as electric efficiency and moment of torsion.
Adopt the structure that magnetizes of the column type p-m rotor of radial magnetizing to do, its magnetic field, pole center line place (core) is the strongest, depart from the magnetic field diminuendo of magnetic pole of the stator center line.According to the magnetics principle, when static, the magnetic pole of p-m rotor will turn to minimum (stator) polar arc section of magnetic resistance, so the factor of decision starting angle size is the length and the gas length of p-m rotor magnetic pole opposite position polar arc section, the magnetic resistance that they are formed is minimum.According to the present invention, first section the polar arc arc length is maximum, gas length is minimum, makes the magnetic resistance at first section polar arc place minimum; Second section polar arc gas length is maximum; Magnetic resistance is bigger, makes second section polar arc less to the influence at starting angle, and the 3rd section polar arc place; Although gas length is gradually little, magnetic resistance is gradually little; But relative with it has not been the core of p-m rotor magnetic pole, makes the 3rd section magnetic arc less to the influence at starting angle yet, and forming the starting angle so the magnetic pole of p-m rotor can turn to first section polar arc and start the angle can be bigger.Because the arc length of the 4th section polar arc is significantly less than the arc length of first section polar arc, so when static, the magnetic pole of p-m rotor can not turn to the 4th section magnetic pole of the stator.
When powering up starting; Stator winding is an impulsive magnetic field in the exciting field of motor main magnetic circuit and the generation of air gap place; According to the present invention; The polar arc shape of every side magnetic pole of the stator (pole shoe) and air gap shape relative stator magnetic pole (pole shoe) center line thereof have symmetry preferably, and the center line of exciting field is overlapped with magnetic pole of the stator (pole shoe) center line basically, and actual starting angle is big so the present invention can make, starting torque is big, therefore p-m rotor can obtain bigger initial velocity.
Theoretical according to dual rotary; The impulsive magnetic field that stator winding produces can be decomposed into two rotating magnetic fields in opposite directions; Again according to the startup principle of hysteresis characteristic and similar hysteresis machine, the lasting acceleration of the hysteresis torque of the equidirectional rotating magnetic field generation hysteresis torque that the p-m rotor that has obtained initial velocity can obtain to produce greater than opposite spin magnetic field and that increase with rotating speed is quickened to pull in.
Actual starting angle is big, starting torque is big, therefore p-m rotor just can obtain bigger initial velocity, and this starting to (synchronously outer) single-phase self-starting permanent magnet synchronous motor is extremely important.Comprehensive above-mentioned analysis; The present invention can make that actual starting angle is big, starting torque is big, therefore p-m rotor can obtain bigger initial velocity; And obtain bigger hysteresis torque thus and quicken quickly to pull in, the starting performance of motor is improved and improves.
According to the present invention; The polar arc shape of every side magnetic pole of the stator and air gap relative stator pole center line itself thereof have symmetry preferably; During the motor synchronous operation; The present invention the uniformity of the rotating magnetic field that impulsive magnetic field resolved into of stator winding generation improved, so can make the uniformity of electromagnetic torque improve.Same the present invention also can make the uniformity of reluctance torque improve property improvement.Comprehensive two aspects, the present invention can make the vibration and the noise of (synchronously outer) single-phase self-starting permanent magnet synchronous motor property improvement that obviously reduces, operates steadily.
The starting of following instruction book phase brushless DC motor and acceleration principle, and operation logic.
Because structure is basic identical, the present invention can make also that the actual starting angle of brushless single phase direct current machine is big, starting torque is big, therefore p-m rotor can obtain bigger initial velocity, and this is to the starting no less important of brushless single phase direct current machine.But it is different with (synchronously outer) single-phase self-starting permanent magnet synchronous motor; Owing to have rotor position detection technology and electronic commutation technology; The brushless single phase direct current machine can quicken in starting with after obtaining initial velocity in motor synchronizing; Until reaching its stable operation rotating speed, so the brushless single phase direct current machine has better starting performance with the load torque balance.
Based on same principle, the present invention can make the vibration of brushless single phase direct current machine and the noise property improvement that obviously reduces, operates steadily.
No matter be (synchronously outer) single-phase self-starting permanent magnet synchronous motor, or brushless single phase direct current machine; When using DC power supply; Adopt electronics inversion transformation technique or electronic commutation technology to produce impulsive magnetic field; Comprise that it is that all (one or two) stator winding provide alternating current simultaneously that (all-wave) mode is controlled in employing entirely, with the generation impulsive magnetic field, or employing half control (half-wave) mode is that two stator winding alternately provide direct current; So that two groups of stator winding alternately produce magnetic field in the opposite direction in iron core, thereby (air gap place) synthesizes impulsive magnetic field in the motor main magnetic circuit.
During to (synchronously outer) single-phase self-starting permanent magnet synchronous motor, can adopt frequency conversion (VF) mode to control its rotating speed,, can adopt pulse-width modulation (PWM) mode to control its rotating speed the brushless single phase direct current machine.
The producible beneficial effect of the present invention is:
1, the starting performance of motor is improved.
2, make motor oscillating and the noise property improvement that reduces, operates steadily.
3, motor flux leakage is reduced, loss reduces, particularly stray loss significantly reduces, and performances such as electric efficiency and moment of torsion improve.
5, guaranteeing to reduce the volume of stator winding and the volume of motor through the present invention under the situation that motor performance does not reduce, reduce the weight of stator winding electromagnetic wire and stator core, reduce manufacturing cost.
6, be used for typical application such as water pump drive motors; The tubular sealing shroud that generally is made of plastics is arranged between p-m rotor and the magnetic pole of the stator (pole shoe); Because the 4th section polar arc is identical with first section polar arc radius; Can make the location between p-m rotor and magnetic pole of the stator more accurate, the manufacturing assembling is simpler, and workmanship guarantees more easily.
Description of drawings
Fig. 1 is the front view of the embodiment of the invention.Fig. 2 is the A-A cutaway view of Fig. 1.
Each label name is called among the figure: 1, magnetic pole of the stator (pole shoe) center line, 2, magnetic pole of the stator (pole shoe), 3, p-m rotor, 4, armature spindle; 5, first section polar arc, 6, second sections polar arcs, 7, the 3rd sections polar arcs; 8, the 4th section polar arc, 9, stator winding, 10, stator core.
Present embodiment is a kind ofly to be used to drive micro pump, directly to use (synchronously outer) the 220V50Hz AC power, that have U-iron heart single-phase self-starting permanent magnet synchronous motor motor; Structure relevant with the present invention, part of only having drawn in the accompanying drawing and position relation thereof, other structure or part do not draw.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present invention is described.
Visible by Fig. 1, Fig. 2, the present invention is by p-m rotor (3), stator core (10) and stator winding (9) formation, and p-m rotor (3) is the cylindrical magnet rotor that magnetizes of the two poles of the earth radially; In p-m rotor (3) outside is the stator that is made up of stator core (10) and stator winding (9), and stator core (10) is a U-shaped, and stator winding (9) is installed in the stator core (10); Two ends that grow the stator core (10) of stator winding (9) are two relative magnetic pole of the stator (2), and magnetic pole of the stator (2) inboard is two relative polar arcs, and every side pole arc is not strict circular arc; To form the non-uniform gap that gas length does not wait in magnetic pole of the stator center line (1) both sides, the polar arc shape of both sides magnetic pole of the stator (2) and formed non-uniform gap thereof is characterized in that about p-m rotor axis symmetry; Magnetic pole of the stator (2) protrudes from the medial surface of U-shaped stator core (10) two arms, and the distance between both sides magnetic pole of the stator (2) is shortened relatively, and every side pole arc is formed by four sections from an end to the other end; First section polar arc (5) is circular arc type; Its arc length is maximum in four sections polar arcs, constitute the even air gap that gas length equates, and its gas length is the air gap minimum value; The position since an end, be extended down near magnetic pole of the stator (pole shoe) center line (1); Second section polar arc (6) is camber or approximate camber, constitute evenly or approximate uniform air gap, and with respect to other three sections polar arcs; Its gas length reaches the air gap maximum; The position is that preceding and first section polar arc (5) join and cross magnetic pole of the stator center line (1) back and join with the 3rd section polar arc (7), and the 3rd section polar arc (7) is camber or the approximate arc that radius reduces gradually, constitutes the air gap that gas length reduces gradually; And its gas length is less than the air gap maximum, greater than the air gap minimum value; The position is that preceding and second section polar arc (6) join, the back joins with the 4th section polar arc (8), and the 4th section polar arc (8) also is circular arc type, and arc length is (specifically relevant with motor size and size of gaps smaller or equal to the arc length 1/2nd of first section polar arc (5); In the present embodiment be first section polar arc (5) arc length about 1/3); Also constitute the even air gap that gas length equates, and its gas length is also identical with the gas length of first section polar arc (5), also be the air gap minimum value, the position be precedingly join with the 3rd section polar arc (7), after be extended down to the other end of every side pole arc.Present embodiment adopts the U-iron heart, also can adopt ring-shaped core, and there are two relative magnetic pole of the stator the ring-shaped core inboard, and magnetic pole of the stator protrudes from the medial surface of annular stator core.The single-phase permanent synchronous machine is because stator winding is more suitable for adopting ring-shaped core for a short time.
P-m rotor (3) is processed by whole permanent magnet or is processed by several permanent magnets; Present embodiment adopts the whole permanent magnet of cylinder (ring) shape; Make or be equipped with armature spindle (4) on the p-m rotor (3), or make or be equipped with bearing, present embodiment adopts with the fixing armature spindle of plastics expressing technique.Permanent magnet can adopt bonding, sintering or permanent magnetic material is mixed in resin or the plastics with injection, extrudes or the manufacturing of thermosetting technology mode, and present embodiment adopts the sintering process manufacturing; Permanent magnetic material has a variety of, since the ferrite good corrosion resistance, the whole ferrite permanent magnet that present embodiment adopts sintering process to make.
Stator core (10) adopts silicon steel plate or low carbon steel plate with the laminar manufacturing, or adopts mealiness soft magnetic material such as iron powder to make, and present embodiment adopts low carbon steel plate with the laminar manufacturing.
Stator winding (9) is centralized winding; Stator winding (9) is by one or constitute by two, and present embodiment adopts and is made up of two stator winding (9).Two stator winding (9) coiling respectively are installed in the stator core (10) after accomplishing again.Two stator winding (9) are that serial or parallel connection connects, and magnetic field is strengthened mutually, and present embodiment adopts and is connected in series.
Present embodiment directly uses ac power supply.But through adopting the present invention of electronics inversion transformation technique or electronically commutated technology also can use DC power supply.
What will specify here is the shape and the gas length of second section polar arc (6), because its effect just strengthens the magnetic resistance of this section polar arc, the magnetic conduction effect is inessential; So its shape is not strict; Be camber or approximate camber, thus its concrete shape promptly can be circular arc type, form even air gap, also can be non-circular arc type; As rectilinear, form approximate uniform air gap, or preferably the arc that reduces gradually of radius, form the approximate uniform air gap that air gap slowly reduces.But no matter specifically adopt which kind of arc, compare with other three sections polar arcs, the gas length of second section polar arc (6) is maximum generally.Visible by Fig. 1, second section polar arc (6) of present embodiment is linear.
What also will specify here is the connection (or transition) between each section polar arc.Though consider from inventive principle; Being connected between first section polar arc (5) and the second section polar arc (6) should be adopted the stairstepping transition; But consider that from punching press (or the powder pressure) manufacturing process of stator core (10) connection at ladder place should be adopted rounding off, so; Should adopt the rounding off of approximate stairstepping or arc as prior art.As shown in Figure 1, present embodiment has adopted such rounding off.And being connected between second section polar arc (6) and the 3rd section polar arc (7), and the 3rd section polar arc (7) and the 4th section polar arc (8) between be connected also and should adopt rounding off.
The experimental result of present embodiment is following.
The starting angle of measuring present embodiment is 15 °, is superior to prototype.Do the test that drives water pump with present embodiment motor and prototype machine.Test shows that the starting time of embodiment is than the obvious shortening of prototype.Observe vibration and noise under the various different loads (flow and lift), the vibration and the noise of present embodiment all obviously reduce.Simultaneously supply current and the power of embodiment obviously reduce, and prove that each item performance of the present invention obviously improves.
Claims (7)
1. a single-phase self-starting permanent magnet synchronous motor is made up of p-m rotor, stator core and stator winding, and adopts inner rotor core; P-m rotor is the cylindrical magnet rotor that magnetizes of the two poles of the earth radially, and the p-m rotor outside is the stator that is made up of stator core and stator winding, it is characterized in that; Stator has two magnetic pole of the stator relative and protrusion, and the distance between the magnetic pole of the stator of both sides is shortened relatively, and the magnetic pole of the stator inboard is two relative polar arcs; Every side pole arc is formed by four sections from an end to the other end, and first section polar arc is circular arc type, and its arc length is maximum in four sections polar arcs; Constitute the even air gap that gas length equates, and its gas length is the air gap minimum value, the position since an end, be extended down near the magnetic pole of the stator center line; Second section polar arc is camber or approximate camber, constitute evenly or approximate uniform air gap, and with respect to other three sections polar arcs; Its gas length reaches the air gap maximum; The position be preceding join with first section polar arc and cross the magnetic pole of the stator center line after join with the 3rd section polar arc, the 3rd section polar arc is camber or the approximate arc that radius reduces gradually, constitutes the air gap that gas length reduces gradually; And its gas length is less than the air gap maximum, greater than the air gap minimum value; The position be precedingly join with second section polar arc, back and the 4th section polar arc join, the 4th section polar arc also is circular arc type, arc length is smaller or equal to the arc length 1/2nd of first section polar arc; Also constitute the even air gap that gas length equates; And its gas length is also identical with the gas length of first section polar arc, also be the air gap minimum value, the position be precedingly join with the 3rd section polar arc, after be extended down to the other end of every side pole arc, the polar arc shape of both sides magnetic pole of the stator and formed non-uniform gap thereof are about p-m rotor axis symmetry.
2. a kind of single-phase self-starting permanent magnet synchronous motor according to claim 1 is characterized in that, p-m rotor is processed by whole permanent magnet or processed by several permanent magnets.
3. a kind of single-phase self-starting permanent magnet synchronous motor according to claim 1 and 2 is characterized in that, makes or be equipped with armature spindle on the p-m rotor, or makes or be equipped with bearing.
4. a kind of single-phase self-starting permanent magnet synchronous motor according to claim 1 and 2 is characterized in that, permanent magnet adopts bonding, sintering or permanent magnetic material is mixed in resin or the plastics with injection, extrudes or the manufacturing of thermosetting technology mode.
5. a kind of single-phase self-starting permanent magnet synchronous motor according to claim 1 is characterized in that, stator core is the stator core of U-shaped or the stator core of annular; Stator core to U-shaped; Stator winding is installed on two arms of stator core, and two ends that grow the stator core of stator winding are two relative magnetic pole of the stator, to the stator core of annular; The magnetic pole of the stator of two relative protrusions is arranged on the annular stator core, and stator winding is installed on the magnetic pole of the stator.
6. according to claim 1 or 5 described a kind of single-phase self-starting permanent magnet synchronous motors, it is characterized in that stator core adopts silicon steel plate or low carbon steel plate with the laminar manufacturing, or the mealiness soft magnetic material is made.
7. according to claim 1 or 5 described a kind of single-phase self-starting permanent magnet synchronous motors, it is characterized in that stator winding is centralized winding, stator winding is made up of a stator winding, or is made up of two stator winding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102471376A CN101854105B (en) | 2009-11-24 | 2009-11-24 | Single-phase self-starting permanent magnet synchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102471376A CN101854105B (en) | 2009-11-24 | 2009-11-24 | Single-phase self-starting permanent magnet synchronous motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101854105A CN101854105A (en) | 2010-10-06 |
| CN101854105B true CN101854105B (en) | 2012-11-28 |
Family
ID=42805412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009102471376A Expired - Fee Related CN101854105B (en) | 2009-11-24 | 2009-11-24 | Single-phase self-starting permanent magnet synchronous motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101854105B (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10734857B2 (en) | 2011-09-26 | 2020-08-04 | Pangolin Laser Systems, Inc. | Electromechanical limited rotation rotary actuator and method employing segmented coils |
| US8963396B2 (en) * | 2011-09-26 | 2015-02-24 | Pangolin Laser Systems, Inc. | Electromechanical device and assembly method |
| CN102790565B (en) * | 2012-08-07 | 2015-11-18 | 江门市地尔汉宇电器股份有限公司 | A kind of Electronic Control directional-rotation single-phase self-starting permanent magnet synchronous motor |
| CN103501095B (en) * | 2013-10-07 | 2015-09-02 | 江门市地尔汉宇电器股份有限公司 | A kind of small permanent magnetic sychronous motor and draining pump using " U " font iron core |
| CN105703591B (en) * | 2014-12-11 | 2019-12-31 | 德昌电机(深圳)有限公司 | Single-phase motor and pump using same |
| CN106487188B (en) * | 2015-09-01 | 2021-04-20 | 德昌电机(深圳)有限公司 | Single-phase permanent magnet motor and stator magnetic core thereof |
| CN105245076A (en) * | 2015-09-25 | 2016-01-13 | 徐州通用高新磁电有限公司 | Single-phase permanent-magnet synchronous motor with U-shaped iron core and self-starting method of single-phase permanent-magnet synchronous motor |
| CN105186947B (en) * | 2015-10-07 | 2017-09-19 | 江门日野电机有限公司 | A kind of directional-rotation single-phase self-starting permanent magnet synchronous motor |
| CN106655561B (en) * | 2017-01-11 | 2023-09-29 | 聊城市鲁杰电机有限公司 | Permanent magnet brush direct current motor magnetic pole structure |
| CN112564447B (en) * | 2020-11-03 | 2022-01-07 | 超音速智能技术(杭州)有限公司 | Small single-phase brushless motor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1220052A (en) * | 1996-05-30 | 1999-06-16 | 维尔莫斯·托洛克 | Self-starting brushless electric machine |
| US6140731A (en) * | 1996-05-30 | 2000-10-31 | Vilmos Trorok | Self-starting brushless electric motor |
| CN2432725Y (en) * | 2000-06-27 | 2001-05-30 | 华中科技大学 | Self-drive monophase diametral winding permanent-magnet reluctance machine |
| CN101447724A (en) * | 2008-12-16 | 2009-06-03 | 美的集团有限公司 | Single-phase double-winding directional running permanent magnet synchronous motor |
-
2009
- 2009-11-24 CN CN2009102471376A patent/CN101854105B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1220052A (en) * | 1996-05-30 | 1999-06-16 | 维尔莫斯·托洛克 | Self-starting brushless electric machine |
| US6140731A (en) * | 1996-05-30 | 2000-10-31 | Vilmos Trorok | Self-starting brushless electric motor |
| CN2432725Y (en) * | 2000-06-27 | 2001-05-30 | 华中科技大学 | Self-drive monophase diametral winding permanent-magnet reluctance machine |
| CN101447724A (en) * | 2008-12-16 | 2009-06-03 | 美的集团有限公司 | Single-phase double-winding directional running permanent magnet synchronous motor |
Non-Patent Citations (2)
| Title |
|---|
| 付敏等.U型单相自起动永磁同步电机参数计算与起动特性分析.《微电机》.2006,(第02期), * |
| 王凤翔等.U型铁芯单相永磁同步电动机起动特性.《沈阳工业大学学报》.2009,(第01期), * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101854105A (en) | 2010-10-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101854105B (en) | Single-phase self-starting permanent magnet synchronous motor | |
| US10498181B2 (en) | Motor and method for using and making the same | |
| CN101109384A (en) | Electric axial flow pump | |
| CN204349847U (en) | The drive circuit of synchronous motor, synchronous motor, air blast and air conditioner | |
| US10734850B2 (en) | Single-phase motor | |
| WO2019033696A1 (en) | Halbach array disk-type coreless hollow shaft permanent magnet motor | |
| Dang et al. | Electromagnetic design considerations for a 50,000 rpm 1kW Switched Reluctance Machine using a flux bridge | |
| US20160365756A1 (en) | Motor and method for using and making the same | |
| CN102118096A (en) | Rotating electrical machine | |
| CN104682641A (en) | Double-stator axial magnetic field motor | |
| CN101980433B (en) | Wedge-shaped stator core outer permanent-magnetic synchronous motor of circumferential phase shift and axial segmentation | |
| US7508157B1 (en) | Line synchronous air core motor | |
| CN105245076A (en) | Single-phase permanent-magnet synchronous motor with U-shaped iron core and self-starting method of single-phase permanent-magnet synchronous motor | |
| US10454354B2 (en) | Single phase motor | |
| Cheng et al. | A permanent magnet flux switching motor for low energy axial fans | |
| CN101834510A (en) | Moving-magnet type transverse flux linear oscillatory motor for direct-drive compressor | |
| CN104184291B (en) | Two half 4 pole asynchronous starting permanent magnet synchronous motors and pole-changing windings method | |
| US20160365782A1 (en) | Motor and method for using and making the same | |
| CN104184284A (en) | Double-magnetic-circuit asynchronous-starting permanent magnet synchronous motor rotor | |
| Qin et al. | Multi-physics design of high-speed large-power permanent magnet synchronous motor | |
| CN109104012A (en) | Motor rotor, motor and DC frequency-changeable compressor | |
| CN206585448U (en) | Double winding two-phase brushless direct current motor | |
| CN205141954U (en) | U single -Phase permanent -Magnet synchronous motor unshakable in one's determination | |
| CN201708678U (en) | Moving magnet type transverse flux linear vibration motor for direct driving compressor | |
| KR101247354B1 (en) | 6/5 C-core Type SRM |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHANDONG UNIV. OF SCIENCE + TECHNOLOGY Free format text: FORMER OWNER: YU JIAYI Effective date: 20140122 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 266555 QINGDAO, SHANDONG PROVINCE TO: 266590 QINGDAO, SHANDONG PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20140122 Address after: 266590 Qingdao economic and Technological Development Zone, Shandong Bay Road, No. 579 Patentee after: Shandong Univ. of Science & Technology Address before: 266555 Yi Meifeng, office of planning and construction of China University of Petroleum, West Changjiang Road, Qingdao economic and Technological Development Zone, Qingdao, Shandong Patentee before: Yu Jiayi |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121128 Termination date: 20201124 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |