CN104158368B - 5500 watt of 4 utmost point energy-conserving and environment-protective motor of super ultra high efficiency - Google Patents
5500 watt of 4 utmost point energy-conserving and environment-protective motor of super ultra high efficiency Download PDFInfo
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Abstract
5500 watt of 4 utmost point energy-conserving and environment-protective motor of super ultra high efficiency, is characterized in that the internal-and external diameter of stator-rotor iron core and length dimension, rotor flute profile and size, groove number to carry out matching coordinative design on the whole, greatly reduces the loss of stator, rotor and iron core; Then in rotor punching, add punching hole and form iron core duct, increase heat temperature convection in motor, reduce and slow down temperature rise; Adopt special casting aluminum rotor effectively to improve conductance and radiating effect; Stator winding adopts in coil 1/2nd places tap, greatly reduces harmonic component loss, further reduces iron loss and copper loss. The resultant effect of kinds of schemes has greatly reduced electric energy loss, make this product at stable output power under the prerequisite at 5.5kW, input power only needs 5.962kW, energy conversion efficiency has reached 92.3%, exceed national highest ranking YE4 level Energy Efficiency Standard, also exceed international highest ranking IE4 classification standard, reached international most advanced level.
Description
Technical field
The present invention relates to motor technology field, particularly a kind of 5500 watt of 4 utmost point energy-conserving and environment-protective motor of super ultra high efficiency that exceedes international IE4 level Energy Efficiency Standard.
Background technology
Electric energy is the important substance energy that people depend on for existence, and its application has been deep into social every field. Every live and work of current people all be unable to do without electric energy. But, due to the transition utilization of electric energy, so that the natural environment to people's life has brought huge negative effect, environmental disruption is very serious, in order to improve environment, energy-saving and emission-reduction have become the topic that the world today cannot avoid, in each field of energy-saving and emission-reduction, because the power consumption of electric system accounts for 60% of China's total electricity consumption, thereby its energy-saving potential is huge.
For this reason, International Electrotechnical Commission (IEC) has issued IEC60034-30 " classification of three-phase cage induction motor efficiency " standard in October, 2008, the efficiency of motor is divided into standard performance IE1, high efficiency IE2, Ultra-High Efficiency IE3 and tetra-grades of super Ultra-High Efficiency IE4. At present, China does not also have the motor of IE4 grade in practical application.
Meanwhile, the Chinese government has proposed the CO2 emission of the year two thousand twenty GDP than the target of decline 40% to 45% in 2005. And promulgate new standard " GB18613-2012 middle-size and small-size threephase asynchronous efficiency limit value and efficiency grade " on September 1st, 2012, specify to rise on September 1st, 2016 middle-size and small-size asynchronous machine and implement the national secondary efficiency of new mark (being equivalent to new YE3 ultra-high efficient motor), every Energy Efficiency Standard does not reach the product (Y of GB mandatory requirement, Y2.Y3, YX3, three grades of efficiencies can not continue to produce and sell. Also recommended new one-level Energy Efficiency Standard (be equivalent to new YE4 super--ultra-high efficient motor) simultaneously.
Summary of the invention
Technical problem to be solved by this invention is for the general low problem of current motor efficiency, provides a kind of efficiency rank to exceed 5500 watt of 4 utmost point energy-conserving and environment-protective motor of international IE4 level, to further save the energy, improves environmental pressure.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is 5500 watt of 4 utmost point energy-conserving and environment-protective motor of a kind of super ultra high efficiency, comprises stator and rotor, and stator comprises stator core and stator punching, rotor comprises rotor core and rotor punching, it is characterized in that following several aspect.
The stator outer diameter of stator core is 21.00cm, and diameter of stator bore is 13.70cm, and the length of stator core is 20.00cm.
Stator punching comprises stator punching groove, and the quantity of described stator punching groove is 36 and is uniformly distributed in the form of a ring, and its flute profile is dome round bottomed vessel, wherein width of rebate is 2.50mm, and notch height is 0.80mm, and groove top is 14.20mm deeply, groove top radius is 3.50mm, and bottom radius is 4.20mm.
The rotor diameter of rotor core is 13.62cm, and rotor internal diameter is 4.20cm, and the length of rotor core is 20.00cm.
Rotor punching comprises rotor punching groove, the quantity of described rotor punching groove is 40 and is uniformly distributed in the form of a ring, its flute profile is the two cage grooves of dome round bottom, and wherein width of rebate is 1.60mm, and notch height is 0.80mm, upper groove diameter is 4.80mm, lower slot opening is 1.20mm, and lower notch height is 1.30mm, and lower groove top is 13.60mm deeply, lower groove top radius is 2.30mm, and lower bottom radius is 1.30mm.
Further, stator punching also comprises double-layer circular stator punching pore area circle, the inner loop-line of its internal layer stator punching pore area circle overlaps with the bottom land circumcircle contour of stator punching groove, the inner loop-line of outer stator punching pore area circle overlaps with the Section of Outer Ring Line of internal layer stator punching pore area circle, every layer of stator punching pore area circle is provided with 36 equally distributed stator punching holes, the shape in stator punching hole is that the length of side is the equilateral triangle of 2.30mm, the wherein mid point of the arcuate zone of the stator punching hole on internal layer stator punching pore area circle between two adjacent stators punching grooves, the mid point of the arcuate zone between two holes in the stator punching hole of the stator punching hole on outer stator punching pore area circle on internal layer stator punching pore area circle.
Rotor punching also comprises double-layer circular rotor punching pore area circle, the Section of Outer Ring Line of its outer rotor punching pore area circle overlaps with the bottom land circumcircle contour of rotor punching groove, the Section of Outer Ring Line of internal layer rotor punching pore area circle overlaps with the inner loop-line of outer rotor punching pore area circle, every layer of rotor punching pore area circle is provided with 40 equally distributed rotor punching holes, the shape in rotor punching hole is that the length of side is the equilateral triangle of 2.30mm, the mid point of the arcuate zone of the rotor punching hole on its ectomesoderm rotor punching pore area circle between two adjacent rotor punching grooves, the mid point of the arcuate zone between two holes in the rotor punching hole of the rotor punching hole on internal layer rotor punching pore area circle on outer rotor punching pore area circle.
Further, rotor punching hole in rotor punching on first rotor punching is evenly distributed on the arbitrfary point of outer rotor punching pore area circle and internal layer rotor punching pore area circle, thereafter the rotor punching hole in adjacent rotor punching successively to same direction rotation displacement 0.05-0.5mm, forms on the whole helical duct at rotor core on rotor punching pore area circle after each rotor punching is superimposed successively.
Further, rotor also comprises casting aluminum rotor material, and the constituent of described casting aluminum rotor material and mass percent thereof are aluminium ingot 77.1%, copper powder 17.3%, silica flour 5.6%.
Further, stator also comprises stator coil, and in described coil, each coil, in the tap of 1/2nd places, and adopts two-tap list string, the mode of connection in parallel; Wherein the 1st circle coil of U phase coil is across on the 1st, the 10 coil grooves around stator, the 2nd circle coil is across on the 2nd, the 9 coil grooves around stator, the 3rd circle coil is across on the 11st, the 18 coil grooves around stator, the 4th circle coil is across on the 19th, the 28 coil grooves around stator, the 5th circle coil is across on the 20th, the 27 coil grooves around stator, and the 6th circle coil is across on the 29th, the 36 coil grooves around stator; The 1st circle coil of V phase coil is across on the 13rd, the 22 coil grooves around stator, the 2nd circle coil is across on the 14th, the 21 coil grooves around stator, the 3rd circle coil is across on the 23rd, the 30 coil grooves around stator, the 4th circle coil is across on the 31st, the 4 coil grooves around stator, the 5th circle coil is across on the 32nd, the 3 coil grooves around stator, and the 6th circle coil is across on the 5th, the 12 coil grooves around stator; The 1st circle coil of W phase coil is across on the 7th, the 16 coil grooves around stator, the 2nd circle coil is across on the 8th, the 15 coil grooves around stator, the 3rd circle coil is across on the 17th, the 24 coil grooves around stator, the 4th circle coil is across on the 25th, the 34 coil grooves around stator, the 5th circle coil is across on the 26th, the 33 coil grooves around stator, and the 6th circle coil is across on the 35th, the 6 coil grooves around stator.
The internal-and external diameter of stator-rotor iron core and length dimension, rotor flute profile and size, groove number have been carried out matching coordinative design on the whole by beneficial effect of the present invention, greatly reduces stator loss, rotor loss and core loss, then in rotor punching, added punching hole, the superimposed rear formation iron core of punching duct, can increase heat temperature convection in motor, reduces and slow down temperature rise, further reduces rotor loss, also can save material simultaneously and reduce iron loss, helical duct can be accelerated heat temperature convection speed, improves the effect that slows down temperature rise, special casting aluminum rotor can effectively improve conductance and radiating effect, stator winding adopts in coil 1/2nd places tap, has not only accelerated running time, also greatly reduces harmonic component loss, reduces energetically 5,7,11,13 higher hamonic wave amplitudes, further reduces iron loss and copper loss, and very convenient in technological operation, the resultant effect of kinds of schemes can greatly reduce electric energy loss, after testing, the motor of making like this can make stator winding loss be reduced to only have 156.0W, rotor winding loss is reduced to only has 66.0W, core loss is reduced to only has 86.1W, stray loss is reduced to only has 110.0W, mechanical loss is reduced to only has 43.8W, its energy total losses amount only has 461.9W, under prerequisite at stable output power at 5.5kW, input power only needs 5.962kW, energy conversion efficiency has reached 92.3%, require 92.1% Energy Efficiency Standard of regulation to require to compare with the middle highest ranking primary standard of national standard " GB18613-2012 middle-size and small-size threephase asynchronous efficiency limit value and efficiency grade " of up-to-date promulgation to the Energy Efficiency Standard of 5500 watt of 4 pole three phase asynchronous motor, exceed 0.2%, also exceeded international highest ranking IE4 classification standard, reached international most advanced level simultaneously.
Brief description of the drawings
Fig. 1 is the structural representation of stator punching in the present invention.
Fig. 2 is the structural representation of stator punching groove in the present invention.
Fig. 3 is the structural representation of rotor punching of the present invention.
Fig. 4 is the structural representation of rotor punching groove of the present invention.
Fig. 5 is the U phase coil wiring expanded view in stator coil in the present invention.
Fig. 6 is the V phase coil wiring expanded view in stator coil in the present invention.
Fig. 7 is the W phase coil wiring expanded view in stator coil in the present invention.
Fig. 8 is the comprehensive wiring expanded view of the three-phase coil in stator coil in the present invention.
In figure: 1. stator punching, 2. rotor punching, 11. stator outer diameters, 12. diameter of stator bores, 3. stator punching groove, 31. width of rebate, 32. notch height, 33. groove tops are dark, 34. groove top radiuses, 35. bottom radius, 21. rotor diameters, 22. rotor internal diameters, 4. rotor punching groove, 41. width of rebate, 42. notch height, groove diameter on 43., 44. times slot openings, 45. times notch is high, 46. times groove top is dark, 47. times groove top radiuses, 48. times bottom radius, 5. stator punching pore area circle, the bottom land circumcircle contour of 51. stator punching grooves, 52. stator punching holes, 6. rotor punching pore area circle, the bottom land circumcircle contour of 61. rotor punching grooves, 62. rotor punching holes, 7. coil, 71.U phase coil, 72.V phase coil, 73.W phase coil.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described, and following examples are intended to illustrate the present invention instead of limitation of the invention further, should not limit the scope of the invention with this.
Embodiment 1.
As shown in the figure, the present invention includes two cores of stator and rotor, stock, structure and preparation method are identical with common 5500 watt of 4 pole three phase asynchronous motor, different places is that the stator outer diameter of stator core 11 is made to 21.00cm, diameter of stator bore 12 is made 13.70cm, and the length of stator core is made 20.00cm. The quantity of the stator punching groove 3 on stator punching 1 is made to 36 and be uniformly distributed in the form of a ring, its flute profile is made to dome round bottomed vessel, wherein width of rebate 31 is made 2.50mm, notch height 32 is made 0.80mm, 14.20mm is made on groove top dark 33, groove top radius 34 is made 3.50mm, and bottom radius 35 is made 4.20mm.
Coordinate simultaneously the rotor diameter of rotor core 21 is made to 13.62cm, rotor internal diameter 22 is made 4.20cm, and the length of rotor core is made 20.00cm. The quantity of the rotor punching groove 4 on rotor punching 2 is made to 40 and be uniformly distributed in the form of a ring, its flute profile is made to the two cage grooves of dome round bottom, wherein width of rebate 41 is made 1.60mm, notch height 42 is made 0.80mm, and upper groove diameter 43 is made 4.80mm, and lower slot opening 44 is made 1.20mm, lower notch high 45 is made 1.30mm, 13.60mm is made on lower groove top dark 46, and lower groove top radius 47 is made 2.30mm, and lower bottom radius 48 is made 1.30mm. So just carry out the supporting innovation of globality from the size of rotor and shape, size and the quantitative aspects of punching groove, the energy consumption of 5500 watt of 4 pole three phase asynchronous motor making is like this reduced greatly.
Embodiment 2.
Further, on the basis of embodiment 1, the bottom land periphery of the stator punching groove 3 on stator punching 1 arranges double-layer circular stator punching pore area circle 5, and the inner loop-line of its internal layer stator punching pore area circle 5 is overlapped with the bottom land circumcircle contour 51 of stator punching groove, the inner loop-line of outer stator punching pore area circle is overlapped with the Section of Outer Ring Line of internal layer stator punching pore area circle, every layer of stator punching pore area circle 5 is provided with 36 equally distributed stator punching holes 52, the shape in stator punching hole 52 is arranged to the equilateral triangle that the length of side is 2.30mm, the wherein mid point of the arcuate zone of the stator punching hole 52 on internal layer stator punching pore area circle between two adjacent stators punching grooves, the mid point of the arcuate zone between two holes in the stator punching hole 52 of the stator punching hole 52 on outer stator punching pore area circle on internal layer stator punching pore area circle.
The bottom land periphery of the rotor punching groove 4 on rotor punching 2 arranges double-layer circular rotor punching pore area circle 6 simultaneously, the Section of Outer Ring Line of its outer rotor punching pore area circle overlaps with the bottom land circumcircle contour 61 of rotor punching groove, the Section of Outer Ring Line of internal layer rotor punching pore area circle overlaps with the inner loop-line of outer rotor punching pore area circle, every layer of rotor punching pore area circle 6 is provided with 40 equally distributed rotor punching holes 62, the shape in rotor punching hole 62 is arranged to the equilateral triangle that the length of side is 2.30mm, the mid point of the arcuate zone of the rotor punching hole 62 on its ectomesoderm rotor punching pore area circle between two adjacent rotor punching grooves, the mid point of the arcuate zone between two holes in the rotor punching hole 62 of the rotor punching hole 62 on internal layer rotor punching pore area circle on outer rotor punching pore area circle.
Then after stator, rotor punching is superimposed respectively, can make each punching hole form iron core duct separately, such motor, in the time of operation, can increase the heat temperature convection in motor, greatly reduces and slow down temperature rise, further reduce rotor loss, also saved material simultaneously and reduced iron loss.
Embodiment 3.
Further, rotor punching hole 62 on first rotor punching in rotor punching in embodiment 22 is evenly distributed on the arbitrfary point of outer rotor punching pore area circle and internal layer rotor punching pore area circle, thereafter the rotor punching hole 62 in adjacent rotor punching 2 successively to same direction (clockwise or counterclockwise) swing offset 0.05mm or displacement 0.1mm or displacement 0.25mm or displacement 0.35mm or displacement 0.5mm, will form on the whole helical duct at rotor core on rotor punching pore area circle 6 after each rotor punching 2 is superimposed successively. Such motor, in the time of operation, can further be accelerated the heat temperature convection in motor, and make Air Flow more abundant, further reduces and slow down temperature rise, reduces rotor loss.
Embodiment 4.
Further, by casting aluminum rotor the material used motor in embodiment 1,2,3, the composition proportion that is aluminium ingot 77.1%, copper powder 17.3%, silica flour 5.6% according to mass percent is prepared. First in smelting furnace, add aluminium ingot, heating makes it to melt completely and insulation at 670-700 DEG C; Then add copper powder, after melting 15-20 minute, adjustment solution temperature is 755-775 DEG C, then adds silica flour, stirs, and after melting 15-20 minute, adds refining agent, stirs, and then carries out die casting.
The rotor bar intensity of making is like this high, and slot cross-section enriches, and has substantially stopped pore and shrinkage cavity, and inherent density is high, effectively reduces stray loss, aluminium consumption and the temperature rise of rotor, has further improved conductance and radiating effect.
Embodiment 5.
Further, on the basis of embodiment 1,2,3 or 4, the each coil 7 in coil of stator of motor, in the tap of 1/2nd places, and is adopted to two-tap list string, the mode of connection in parallel; Wherein the 1st circle coil of U phase coil 71 is across on the 1st, the 10 coil grooves around stator, the 2nd circle coil is across on the 2nd, the 9 coil grooves around stator, the 3rd circle coil is across on the 11st, the 18 coil grooves around stator, the 4th circle coil is across on the 19th, the 28 coil grooves around stator, the 5th circle coil is across on the 20th, the 27 coil grooves around stator, and the 6th circle coil is across on the 29th, the 36 coil grooves around stator; The 1st circle coil of V phase coil 72 is across on the 13rd, the 22 coil grooves around stator, the 2nd circle coil is across on the 14th, the 21 coil grooves around stator, the 3rd circle coil is across on the 23rd, the 30 coil grooves around stator, the 4th circle coil is across on the 31st, the 4 coil grooves around stator, the 5th circle coil is across on the 32nd, the 3 coil grooves around stator, and the 6th circle coil is across on the 5th, the 12 coil grooves around stator; The 1st circle coil of W phase coil 73 is across on the 7th, the 16 coil grooves around stator, the 2nd circle coil is across on the 8th, the 15 coil grooves around stator, the 3rd circle coil is across on the 17th, the 24 coil grooves around stator, the 4th circle coil is across on the 25th, the 34 coil grooves around stator, the 5th circle coil is across on the 26th, the 33 coil grooves around stator, and the 6th circle coil is across on the 35th, the 6 coil grooves around stator.
The stator coil of making like this, can accelerate running time, greatly reduce harmonic component loss, reduce energetically 5,7,11,13 higher hamonic wave amplitudes, after testing, 5,7,11,13 higher hamonic wave amplitudes have dropped to 0.003,0.002,0.004,0.005, have further reduced iron loss and copper loss, and very convenient in technological operation.
5500 watt of 4 pole three phase asynchronous motor that in embodiment 5, comprehensive each scheme is made measured according to the loss analysis method of the B method-measurement input-output power in GB/T1032, at 75 DEG C of temperature, record: the stator winding loss of this motor only has 156.0W, rotor winding loss only has 66.0W, core loss only has 86.1W, stray loss only has 110.0W, mechanical loss only has 43.8W, and its energy total losses amount only has 461.9W; Under prerequisite at stable output power at 5.5kW, input power only needs 5.962kW, energy conversion efficiency has reached 92.3%, require 92.1% Energy Efficiency Standard of regulation to require to compare with the middle highest ranking primary standard of national standard " GB18613-2012 middle-size and small-size threephase asynchronous efficiency limit value and efficiency grade " of up-to-date promulgation to the Energy Efficiency Standard of 5500 watt of 4 pole three phase asynchronous motor, exceeded 0.2%; Also exceeded international highest ranking IE4 classification standard, reached international most advanced level simultaneously. Applying of this product will effectively be contributed share than the target of decline 40% to 45% in 2005 for China is implemented to the CO2 emission of the year two thousand twenty GDP.
Claims (3)
1. surpass 5500 watt of 4 utmost point energy-conserving and environment-protective motor of ultra high efficiency, comprise stator and rotor, stator comprises stator core and stator punching (1), and rotor comprises rotor core and rotor punching (2), it is characterized in that:
The stator outer diameter (11) of stator core is 21.00cm, and diameter of stator bore (12) is 13.70cm, and the length of stator core is 20.00cm;
Stator punching (1) comprises stator punching groove (3), the quantity of described stator punching groove is 36 and is uniformly distributed in the form of a ring, its flute profile is dome round bottomed vessel, wherein width of rebate (31) is 2.50mm, notch height (32) is 0.80mm, groove top dark (33) is 14.20mm, and groove top radius (34) is 3.50mm, and bottom radius (35) is 4.20mm;
The rotor diameter (21) of rotor core is 13.62cm, and rotor internal diameter (22) is 4.20cm, and the length of rotor core is 20.00cm;
Rotor punching (2) comprises rotor punching groove (4), the quantity of described rotor punching groove is 40 and is uniformly distributed in the form of a ring, its flute profile is the two cage grooves of dome round bottom, and wherein width of rebate (41) is 1.60mm, and notch height (42) is 0.80mm, upper groove diameter (43) is 4.80mm, lower slot opening (44) is 1.20mm, and lower notch high (45) is 1.30mm, and lower groove top dark (46) are 13.60mm, lower groove top radius (47) is 2.30mm, and lower bottom radius (48) is 1.30mm;
Described stator punching (1) also comprises double-layer circular stator punching pore area circle (5), the inner loop-line of its internal layer stator punching pore area circle overlaps with the bottom land circumcircle contour (51) of stator punching groove, the inner loop-line of outer stator punching pore area circle overlaps with the Section of Outer Ring Line of internal layer stator punching pore area circle, every layer of stator punching pore area circle (5) is provided with 36 equally distributed stator punching holes (52), the shape in stator punching hole (52) is that the length of side is the equilateral triangle of 2.30mm, wherein the stator punching hole (52) on internal layer stator punching pore area circle is positioned at the mid point of the arcuate zone between two adjacent stators punching grooves (3), stator punching hole (52) on outer stator punching pore area circle is positioned at the mid point of the arcuate zone between two holes in the stator punching hole (52) on internal layer stator punching pore area circle,
Rotor punching (2) also comprises double-layer circular rotor punching pore area circle (6), the Section of Outer Ring Line of its outer rotor punching pore area circle overlaps with the bottom land circumcircle contour (61) of rotor punching groove, the Section of Outer Ring Line of internal layer rotor punching pore area circle overlaps with the inner loop-line of outer rotor punching pore area circle, every layer of rotor punching pore area circle (6) is provided with 40 equally distributed rotor punching holes (62), the shape in rotor punching hole (62) is that the length of side is the equilateral triangle of 2.30mm, rotor punching hole (62) on its ectomesoderm rotor punching pore area circle is positioned at the mid point of the arcuate zone between two adjacent rotor punching grooves (4), rotor punching hole (62) on internal layer rotor punching pore area circle is positioned at the mid point of the arcuate zone between two holes in the rotor punching hole (62) on outer rotor punching pore area circle,
Rotor punching hole (62) in described rotor punching (2) on first rotor punching is evenly distributed on the arbitrfary point of outer rotor punching pore area circle and internal layer rotor punching pore area circle, thereafter the rotor punching hole (62) in adjacent rotor punching (2) successively to same direction rotation displacement 0.05-0.5mm, forms on the whole helical duct at rotor core on rotor punching pore area circle (6) after each rotor punching (2) is superimposed successively.
2. 5500 watt of 4 utmost point energy-conserving and environment-protective motor of super ultra high efficiency according to claim 1, it is characterized in that rotor also comprises casting aluminum rotor material, the constituent of described casting aluminum rotor material and mass percent thereof are aluminium ingot 77.1%, copper powder 17.3%, silica flour 5.6%.
3. 5500 watt of 4 utmost point energy-conserving and environment-protective motor of super ultra high efficiency according to claim 1 and 2, is characterized in that stator also comprises stator coil, and in described coil (7), each coil, in the tap of 1/2nd places, and adopts two-tap list string, the mode of connection in parallel; Wherein the 1st circle coil of U phase coil (71) is across on the 1st, the 10 coil grooves around stator, the 2nd circle coil is across on the 2nd, the 9 coil grooves around stator, the 3rd circle coil is across on the 11st, the 18 coil grooves around stator, the 4th circle coil is across on the 19th, the 28 coil grooves around stator, the 5th circle coil is across on the 20th, the 27 coil grooves around stator, and the 6th circle coil is across on the 29th, the 36 coil grooves around stator; The 1st circle coil of V phase coil (72) is across on the 13rd, the 22 coil grooves around stator, the 2nd circle coil is across on the 14th, the 21 coil grooves around stator, the 3rd circle coil is across on the 23rd, the 30 coil grooves around stator, the 4th circle coil is across on the 31st, the 4 coil grooves around stator, the 5th circle coil is across on the 32nd, the 3 coil grooves around stator, and the 6th circle coil is across on the 5th, the 12 coil grooves around stator; The 1st circle coil of W phase coil (73) is across on the 7th, the 16 coil grooves around stator, the 2nd circle coil is across on the 8th, the 15 coil grooves around stator, the 3rd circle coil is across on the 17th, the 24 coil grooves around stator, the 4th circle coil is across on the 25th, the 34 coil grooves around stator, the 5th circle coil is across on the 26th, the 33 coil grooves around stator, and the 6th circle coil is across on the 35th, the 6 coil grooves around stator.
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| CN102810957A (en) * | 2012-07-25 | 2012-12-05 | 重庆市乐尔佳机械有限公司 | Ultra-efficient 7,500W bipolar three-phase asynchronous motor |
| CN203352309U (en) * | 2013-07-01 | 2013-12-18 | 河北省机械科学研究设计院 | Stator and rotor structure of 200-type submersible electric motor for well |
| CN103647385A (en) * | 2013-11-30 | 2014-03-19 | 重庆市乐尔佳机械有限公司 | Ultrahigh energy efficiency 250W two-pole three-phase asynchronous motor |
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