CN103904966A - Electric tool and motor control method of electric tool - Google Patents
Electric tool and motor control method of electric tool Download PDFInfo
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- CN103904966A CN103904966A CN201210579258.2A CN201210579258A CN103904966A CN 103904966 A CN103904966 A CN 103904966A CN 201210579258 A CN201210579258 A CN 201210579258A CN 103904966 A CN103904966 A CN 103904966A
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Abstract
Disclosed are an electric tool and a motor control method of the electric tool. The electric tool includes a power-output shaft, a motor used for controlling the power-output shaft to rotate, a control device used for controlling electric output of the motor and a power-supplying device used for providing electric energy to the motor and the control device. The control device includes a micro-control unit. A power-supplying circuit of the motor is connected with a field-effect transistor. The control device also includes a current regulating module, a transistor driving module used for driving the field-effect transistor and a current acquisition module used for acquiring a practical work current of the power-supplying circuit. The current regulating module and the transistor driving module are connected sequentially between the micro-control unit and the field-effect transistor. The current acquisition module is connected with the micro-control unit. After the current regulating module compares a set reference current range with the practical work current of the motor, output of the current regulating module controls the transistor driving module so that a load current of the field-effect transistor is kept to be within a range of reference current range values.
Description
Technical field
the present invention relates to the motor control method of a kind of electric tool and electric tool.
Background technology
in prior art, as drill gun, electric hammer etc., comprise pedestal, be separately positioned on power output shaft on pedestal, for control motor that described power output shaft rotates, for control described motor electronic output control device, the electric supply installation etc. of power is provided for the motor to described and described control device, described control device comprises a micro-control unit etc.In use, control device, by detecting the operating current of motor, often can run into the situation of heavy load, and now electric current can reach a very high value, and control device can cut off the output of motor, and power output shaft stops.This mode can reach the object of protection electric tool, but concerning user, if protection is frequent shutdown too, impact is greatly used.
Summary of the invention
first technical problem that the present invention will solve is to provide a kind of electric tool.
in order to solve the problems of the technologies described above, the technical solution used in the present invention is: a kind of electric tool, comprise power output shaft, the motor rotating for controlling described power output shaft, be used for the control device of the electronic output of controlling described motor, for the electric supply installation of power is provided to described motor and described control device, described control device comprises a micro-control unit, on the current supply circuit of described motor, be connected with field-effect transistor, described control device also comprises current regulating module, for driving the transistor driving module of described field-effect transistor, be used for the current acquisition module of the real work electric current that gathers current supply circuit, between micro-control unit described in described current regulating module and described transistor driving module are connected in turn and described field-effect transistor, described current acquisition module is connected with described micro-control unit, after described current regulating module compares the real work electric current of the reference current ranges of setting and described motor, described transistor driving module is controlled in its output, thereby the load current of controlling described field-effect transistor maintains within the scope of reference current ranges value.
in some embodiments, described electric tool is drill gun or electric hammer.
second technical problem that the present invention will solve is to provide a kind of motor control method of electric tool.
in order to solve the problems of the technologies described above, the technical solution used in the present invention is: a kind of motor control method that adopts above-mentioned electric tool, and for controlling the electronic output of described motor, this motor control method comprises:
described current acquisition module gathers the real work electric current of described motor;
described current regulating module compares the real work electric current of the reference current ranges of setting and described motor, in the time that real work electric current is more than or equal to the reference current ranges of setting, drive described field-effect transistor to make the current constant of described motor in a little current range, control described motor with less moment of torsion output, in the time that real work electric current is less than the reference current ranges of setting, the normal output of the motor described in recovering.
scope of the present invention, is not limited to the technical scheme that the particular combinations of above-mentioned technical characterictic forms, and also should contain by above-mentioned technical characterictic or its equivalent feature and carry out combination in any and other technical scheme of forming simultaneously.The technical characterictic that such as, in above-mentioned feature and the application disclosed (1 but be not limited to) has a similar functions is replaced mutually and technical scheme of forming etc.
because technique scheme is used; the present invention compared with prior art has following advantages: electric tool can not produce due to heavy load the situation of autostop at work; effectively avoid user to need back off tool switch and instrument is exited to stall state again to start instrument; but as long as back off tool exits stall state a little, machine just can continue normal work.
Brief description of the drawings
the internal structure schematic diagram that accompanying drawing 1 is drill gun;
accompanying drawing 2 is circuit theory diagrams of the present invention;
the circuit diagram that accompanying drawing 3 is current regulating module;
accompanying drawing 4 is the relation principle schematic diagram of general Motor torque, current of electric and motor speed;
accompanying drawing 5 is the relation principle schematic diagram of Motor torque, current of electric and motor speed in the present invention;
wherein: 11, power output shaft; 12, motor; 13, electric supply installation; 14, pedestal; 15, micro-control unit; 16, current regulating module; 17, transistor driving module; 18, field-effect transistor; 19, current acquisition module.
Embodiment
a kind of electric tool, as shown in Figure 1, taking drill gun as example, comprise pedestal 4, also comprise the power output shaft 11 that is separately positioned on pedestal 4, for control motor 12 that power output shaft 11 rotates, for control motor 12 electronic output control device, for the electric supply installation 13 of power is provided to motor 12 and control device.
as accompanying drawing 2, accompanying drawing 3, control device comprises a micro-control unit 15, on the current supply circuit of motor 12, be provided with field-effect transistor 18, control device also comprises current regulating module 16, for driving the transistor driving module 17 of field-effect transistor 18, be used for the current acquisition module 19 of the real work electric current that gathers current supply circuit, current regulating module 16 and transistor driving module 17 are connected in turn between micro-control unit 15 and field-effect transistor 18, current acquisition module 19 is connected with micro-control unit 15, after current regulating module 16 compares the real work electric current of the reference current ranges of setting and motor 12, its output control transistor driver module 17, thereby the load current of controlling filed effect transistor 18 maintains within the scope of reference current ranges value.
wherein, micro-control unit 15 is PIC16F1936, microchip company.
please refer to Fig. 4, the pass between the output torque T of motor and current of electric and motor speed N is: in the time that current of electric is definite value, motor speed N is higher, and torque T is less; In the time that motor speed N is definite value, current of electric is larger, and torque T is larger; In the time that torque T is definite value, current of electric is larger, and motor speed N is higher.
as shown in accompanying drawing 2, accompanying drawing 5, a kind of motor control method that adopts above-mentioned drill gun, for controlling the electronic output of motor 12, this motor control method comprises:
current regulating module 16 compares the real work electric current of the reference current ranges of setting and motor 12, in the time that real work electric current is more than or equal to the reference current ranges of setting, drive field-effect transistor 18 to make the current constant of motor 12 in a little current range, control motor 12 with less moment of torsion output; And ought unclamp a little the power output shaft 1 of drill gun, and when real work electric current is less than the reference current ranges of setting, recover the normal output of motor 12, return to no-load current.
as shown in Figure 3, the operation principle of current regulating module 16: by D/A input, benchmark electric current is set, Current is current real work electric current, in the time that real work electric current is less than reference current, GATE end output high level, otherwise output low level.The GATE end that GATE end is connected to transistor driving module 17 regulates field-effect transistor 18 switches, thereby makes load current maintain reference current value.
as mentioned above, we are illustrated according to aim of the present invention completely, but the present invention is not limited to above-described embodiment and implementation method.The practitioner of correlative technology field can carry out different variations and enforcement in the scope of technological thought license of the present invention.
Claims (3)
1. an electric tool, comprise power output shaft (11), the motor (12) rotating for controlling described power output shaft (11), be used for the control device of the electronic output of controlling described motor (12), for the electric supply installation (13) of power is provided to described motor (12) and described control device, described control device comprises a micro-control unit (15), it is characterized in that: on the current supply circuit of described motor (12), be connected with field-effect transistor (18), described control device also comprises current regulating module (16), for driving the transistor driving module (17) of described field-effect transistor (18), be used for the current acquisition module (19) of the real work electric current that gathers current supply circuit, between micro-control unit (15) described in described current regulating module (16) and described transistor driving module (17) are connected in turn and described field-effect transistor (18), described current acquisition module (19) is connected with described micro-control unit (15), after described current regulating module (16) compares the real work electric current of the reference current ranges of setting and described motor (12), described transistor driving module (17) is controlled in its output, thereby the load current of controlling described field-effect transistor (18) maintains within the scope of reference current ranges value.
2. electric tool according to claim 1, is characterized in that: described electric tool is drill gun or electric hammer.
3. according to a motor control method for the electric tool of claim 1 or 2, for controlling the electronic output of described motor (12), it is characterized in that: this motor control method comprises:
Described current acquisition module (19) gathers the real work electric current of described motor (12);
Described current regulating module (16) compares the real work electric current of the reference current ranges of setting and described motor (12), in the time that real work electric current is more than or equal to the reference current ranges of setting, drive described field-effect transistor (18) to make the current constant of described motor (12) in a little current range, control described motor (12) with less electric current output, in the time that real work electric current is less than the reference current ranges of setting, the normal output of the motor (12) described in recovering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210579258.2A CN103904966A (en) | 2012-12-27 | 2012-12-27 | Electric tool and motor control method of electric tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210579258.2A CN103904966A (en) | 2012-12-27 | 2012-12-27 | Electric tool and motor control method of electric tool |
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| Publication Number | Publication Date |
|---|---|
| CN103904966A true CN103904966A (en) | 2014-07-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210579258.2A Pending CN103904966A (en) | 2012-12-27 | 2012-12-27 | Electric tool and motor control method of electric tool |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105500295A (en) * | 2015-07-01 | 2016-04-20 | 刘国建 | Electric tool with using state capable of being inquired |
| WO2016082701A1 (en) * | 2014-11-27 | 2016-06-02 | 天佑电器（苏州）有限公司 | Electric tool control circuit |
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| US20050083630A1 (en) * | 2002-10-11 | 2005-04-21 | Young-Hoan Jun | Overload protective apparatus of a compressor and a method thereof |
| CN101141107A (en) * | 2006-09-04 | 2008-03-12 | 希尔蒂股份公司 | Method for actuating a motor |
| US20090098971A1 (en) * | 2006-08-01 | 2009-04-16 | Chi Hong Ho | Automatic transmission for a power tool |
| CN201483037U (en) * | 2009-07-10 | 2010-05-26 | 苏州宝时得电动工具有限公司 | Electric tool |
| CN101771379A (en) * | 2009-01-04 | 2010-07-07 | 苏州宝时得电动工具有限公司 | Control method of electric tool and electric tool executing same |
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2012
- 2012-12-27 CN CN201210579258.2A patent/CN103904966A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050083630A1 (en) * | 2002-10-11 | 2005-04-21 | Young-Hoan Jun | Overload protective apparatus of a compressor and a method thereof |
| US20090098971A1 (en) * | 2006-08-01 | 2009-04-16 | Chi Hong Ho | Automatic transmission for a power tool |
| CN101141107A (en) * | 2006-09-04 | 2008-03-12 | 希尔蒂股份公司 | Method for actuating a motor |
| CN101771379A (en) * | 2009-01-04 | 2010-07-07 | 苏州宝时得电动工具有限公司 | Control method of electric tool and electric tool executing same |
| CN201483037U (en) * | 2009-07-10 | 2010-05-26 | 苏州宝时得电动工具有限公司 | Electric tool |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016082701A1 (en) * | 2014-11-27 | 2016-06-02 | 天佑电器（苏州）有限公司 | Electric tool control circuit |
| CN105700463A (en) * | 2014-11-27 | 2016-06-22 | 天佑电器（苏州）有限公司 | Control circuit of electric tool |
| US10483884B2 (en) | 2014-11-27 | 2019-11-19 | Suzhou Cleva Electric Appliance Co., Ltd | Electric tool control circuit |
| CN105500295A (en) * | 2015-07-01 | 2016-04-20 | 刘国建 | Electric tool with using state capable of being inquired |
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Application publication date: 20140702 |
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