CN103296946A - Driver of brushless electric machine and circuit thereof - Google Patents
Driver of brushless electric machine and circuit thereof Download PDFInfo
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- CN103296946A CN103296946A CN2013100216590A CN201310021659A CN103296946A CN 103296946 A CN103296946 A CN 103296946A CN 2013100216590 A CN2013100216590 A CN 2013100216590A CN 201310021659 A CN201310021659 A CN 201310021659A CN 103296946 A CN103296946 A CN 103296946A
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Abstract
The invention relates to a driver of a brushless electric machine. The driver of the brushless electric machine comprises a shell body, a control circuit board internally arranged in the shell body, a control output interface formed in the shell body and a power source connecting wire. The control circuit board comprises a power source circuit and an electric machine starting control unit, wherein the electric machine starting control unit comprises a driving circuit and a control single chip microcomputer. The control circuit board further comprises a power type NTC thermistor with negative temperature coefficients, wherein the power type NTC thermistor is connected between the power source circuit and the electric machine starting control unit in series. Therefore, when the brushless electric machine is started, currents are started to pass through the power type NTC thermistor, the power type NTC thermistor restrains the impact (surge) of the currents, only small currents flow into an electric machine winding, damage of devices in the control circuit board is avoided, and the starting of the electric machine is safer. When starting is finished, under the action of the currents, the temperature of the power type NTC thermistor rises, and therefore the resistance value of the power type NTC thermistor is decreased, and the normal currents of the electric machine are not influenced.
Description
Technical field
The present invention relates to a kind of brushless electric machine control field, relate in particular to a kind of driver of brushless electric machine, control circuit board in the driver of this brushless electric machine comprises the power-type NTC themistor of negative temperature coefficient, and this power-type NTC themistor is connected between power circuit and the electric motor starting control unit.The invention still further relates to a kind of safety starter circuit of brushless electric machine, this circuit also comprises the power-type NTC themistor of negative temperature coefficient, this power-type NTC themistor is connected between power circuit and the electric motor starting control unit, realizes the effect of control starting current.
Background technology
Brushless electric machine control is simple, and cost is low, and does not have carbon dust and pollute, and becomes the main flow in market gradually.But in brushless electric machine when work,, controller is brushless electric machine and part and parcel thereof, and it is related to the many indexs such as performance, noise, cost, reliability, useful life of brushless electric machine.
Yet the electric current of this brushless electric machine starting moment is big, easily causes burning of circuit element, particularly brushless electric machine starts repeatedly, it is repeatedly excessive to cause in controller or the circuit electric current to occur, and the subelement in the controller very easily occurs burning, even can cause fire.Thus, cause brushless electric machine effectively not to be used in the product.
Summary of the invention
The technical problem that the present invention solves provides a kind of driver of safe, stable brushless electric machine, can effectively control the brushless electric machine starting surge current of moment.
Another technical problem that the present invention solves is, a kind of safety starter circuit of brushless electric machine is provided, and guarantees the use safety of brushless electric machine, and then promoted the using value of brushless electric machine.
The present invention is achieved through the following technical solutions:
A kind of driver of brushless electric machine, comprise that housing, housing are built-in with control circuit board, control output interface and electric power connection line, control circuit board comprises power circuit, electric motor starting control unit, this electric motor starting control unit comprises drive circuit and control single chip computer, described control circuit board also comprises the power-type NTC themistor of negative temperature coefficient, and this power-type NTC themistor is connected between power circuit and the electric motor starting control unit.
Described drive circuit is 4 H bridge drive circuits that the MOSFET pipe is formed.
Described control single chip computer has two groups of PWM delivery outlets at least.
Also be provided with the signals collecting mouth on the described housing, brushless electric machine is provided with Hall element, and Hall element is connected with control circuit board through the signals collecting mouth.
Described Hall element is the bipolarity Hall element.
Also be provided with motor speed on the described housing and regulate button and mains switch.
A kind of safety starter circuit of brushless electric machine, comprise power circuit, electric motor starting control unit, this electric motor starting control unit comprises drive circuit and control single chip computer, described circuit also comprises the power-type NTC themistor of negative temperature coefficient, and this power-type NTC themistor is connected between power circuit and the electric motor starting control unit.
The beneficial effect that the present invention brings is:
The control circuit board of brushless electric machine driver of the present invention also comprises the power-type NTC themistor of negative temperature coefficient, and this power-type NTC themistor is connected between power circuit and the electric motor starting control unit.So, in this brushless electric machine starting moment, starting current is through the power-type NTC themistor, the power-type NTC themistor has suppressed the impact (surge) of electric current, have only very little electric current to flow into the motor winding, avoided the damage of element in the control circuit board, electric motor starting is safer, when starting end, the power-type NTC themistor is because it possesses negative temperature coefficient, under the effect of electric current, thereby the rising of power-type NTC themistor temperature reduces its resistance value, does not influence the motor normal current again.
Also be provided with the signals collecting mouth on the housing of the present invention, brushless electric machine is provided with Hall element, and Hall element is connected with control circuit board through the signals collecting mouth.Realize rotor-position is detected by Hall element, so that the commutation information of control circuit board to be provided, guarantee the stationarity of brushless electric machine commutation.
The safety starter circuit of brushless electric machine of the present invention, comprise power circuit, electric motor starting control unit, this electric motor starting control unit comprises drive circuit and control single chip computer, described circuit also comprises the power-type NTC themistor of negative temperature coefficient, and this power-type NTC themistor is connected between power circuit and the electric motor starting control unit.So, suppressed the impact (surge) of electric current by the power-type NTC themistor, have only very little electric current to flow into the motor winding, avoided the damage of element in the control circuit board, electric motor starting is safer, effectively promote the security performance of brushless electric machine, reduced the danger that element is burnt, and then enlarged the range of application and the using value that has promoted brushless electric machine of brushless electric machine.
Description of drawings
Fig. 1 is the structural representation of the driver of brushless electric machine of the present invention;
Fig. 2 is the control circuit board block diagram of Fig. 1;
Fig. 3 is the circuit block diagram of the safety starter circuit of brushless electric machine of the present invention.
Embodiment
The present invention is described in further detail below in conjunction with execution mode:
Execution mode one:
See also the execution mode of the driver of Fig. 1, Fig. 2 and brushless electric machine of the present invention 10 shown in Figure 3, comprise that housing 11, housing 11 are built-in with control circuit board 12, housing is provided with control output interface 111 and electric power connection line 112, control circuit board 12 comprises power circuit 13, electric motor starting control unit 14, and this electric motor starting control unit 14 comprises drive circuit 141 and control single chip computer 142.Described control circuit board 12 also comprises the power-type NTC themistor 15 of negative temperature coefficient, and this power-type NTC themistor 15 is connected between power circuit 13 and the electric motor starting control unit 14.
Also be provided with motor speed on the described housing 11 and regulate button 16 and mains switch 17.Electric machine speed regulation button 16 connects control circuit board 12.Mains switch 17 connects power line and control circuit board 12.
Described power circuit 13 is switching power circuit.
The power-type NTC themistor 15 of described negative temperature coefficient is when 25 ℃ of temperature, resistance 0.7 Ω-400 Ω, about general 7 Ω, maximum steady state electric current 0.1A-13A, about general 6A, the maximum limit flow resistance is worth 0.018 Ω-9.852 Ω, general resistance 0.162 Ω, NTC themistor 15 external diameter 6.5mm-26.5mm, thickness 5mm-8mm; Negative tempperature coefficient thermistor is by Mn (manganese) mostly; Ni (nickel); Co (cobalt); Fe (iron); Cu metal oxides such as (copper) is made through the semi-conducting material that oversintering forms; have very high sensitivity and good performance; start moment at brushless electric machine 10; electric current is through NTC themistor 15; five to ten times surge current when being used for suppressing motor 10 startups; have only this moment very little electric current to flow into the motor winding; exempt from destruction with components and parts such as the pipes of the MOSFET in the rapid protective circuit; after NTC themistor is finished surge current; thereby because self-temperature rises resistance is reduced, do not influence the motor operate as normal.
In addition, also be provided with signals collecting mouth 18 on the housing 11 of the present invention, brushless electric machine 10 is provided with Hall element 19, and Hall element 19 is connected with control circuit board 12 through signals collecting mouth 18.This Hall element 19 is the bipolarity Hall element.Realize rotor-position is detected by the bipolarity Hall element, so that the commutation information of control circuit board 12 to be provided, guarantee the stationarity of brushless electric machine 10 commutations, further promote the performance of brushless electric machine.
The safety starter circuit of brushless electric machine of the present invention, comprise power circuit 13, electric motor starting control unit 14, this electric motor starting control unit 14 comprises drive circuit 141 and control single chip computer 142, described circuit also comprises the power-type NTC themistor 15 of negative temperature coefficient, and this power-type NTC themistor is connected between power circuit 13 and the electric motor starting control unit 14.So, the power-type NTC themistor 15 of serial connection negative temperature coefficient between power circuit 13 and electric motor starting control unit 14.Effectively suppressed the surge current of brushless electric machine starting moment, and do not influenced the steady operation of later stage motor, reliable and stable, security performance is higher.
In addition, adopt safety starter circuit of the present invention, even the startup repeatedly of brushless electric machine, surge current also can obtain good restraining, and is safe and reliable, satisfies the demand of motor discontinuous operation pattern, promote the application safety of brshless DC motor, and then promoted its using value.
Certainly, described power circuit also can be transformer circuit.
Certainly, to regulate button also can be the speed governing knob for described motor speed.Rotor also can be by being made up of a pair of utmost point permanent magnetism.
Certainly, the arc radius of described second cambered surface also can be less than the arc radius of first cambered surface.
Certainly, the quantity of described pole body also can be more than 4.The variation of so this non-essence of the present invention is also in protection range of the present invention.
Claims (7)
1. the driver of a brushless electric machine, comprise that housing, housing are built-in with control circuit board, are located at control output interface and electric power connection line on the housing, control circuit board comprises power circuit, electric motor starting control unit, this electric motor starting control unit comprises drive circuit and control single chip computer, it is characterized in that: described control circuit board also comprises the power-type NTC themistor of negative temperature coefficient, and this power-type NTC themistor is connected between power circuit and the electric motor starting control unit.
2. the driver of brushless electric machine according to claim 1, it is characterized in that: described drive circuit is 4 H bridge drive circuits that the MOSFET pipe is formed.
3. as the driver of brushless electric machine as described in the claim 2, it is characterized in that: described control single chip computer has two groups of PWM delivery outlets at least.
4. as the driver of brushless electric machine as described in claim 1 or 2 or 3, it is characterized in that: also be provided with the signals collecting mouth on the described housing, brushless electric machine is provided with Hall element, and Hall element is connected with control circuit board through the signals collecting mouth.
5. as the driver of brushless electric machine as described in the claim 4, it is characterized in that: described Hall element is the bipolarity Hall element.
6. as the driver of brushless electric machine as described in the claim 5, it is characterized in that: also be provided with motor speed on the described housing and regulate button and mains switch.
7. the safety starter circuit of a brushless electric machine, comprise power circuit, electric motor starting control unit, this electric motor starting control unit comprises drive circuit and control single chip computer, it is characterized in that: described circuit also comprises the power-type NTC themistor of negative temperature coefficient, and this power-type NTC themistor is connected between power circuit and the electric motor starting control unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100216590A CN103296946A (en) | 2013-01-02 | 2013-01-02 | Driver of brushless electric machine and circuit thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100216590A CN103296946A (en) | 2013-01-02 | 2013-01-02 | Driver of brushless electric machine and circuit thereof |
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| Publication Number | Publication Date |
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| CN103296946A true CN103296946A (en) | 2013-09-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013100216590A Pending CN103296946A (en) | 2013-01-02 | 2013-01-02 | Driver of brushless electric machine and circuit thereof |
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| CN (1) | CN103296946A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105867200A (en) * | 2016-06-20 | 2016-08-17 | 国家电网公司 | Intelligent control method for switch cabinet handcart and earthing knife switch |
| CN107503620A (en) * | 2017-10-17 | 2017-12-22 | 东莞市天纳科汽车自动化有限公司 | A kind of push rod controller |
| CN107817732A (en) * | 2017-11-28 | 2018-03-20 | 美尚生态景观股份有限公司 | A kind of wireless electric saw control system |
| CN108988623A (en) * | 2018-08-23 | 2018-12-11 | 深圳市弘粤驱动有限公司 | A kind of short-circuit protection of external load |
| CN110601616A (en) * | 2019-10-16 | 2019-12-20 | 南京盛伯智能科技有限公司 | Direct current brush motor driver |
-
2013
- 2013-01-02 CN CN2013100216590A patent/CN103296946A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105867200A (en) * | 2016-06-20 | 2016-08-17 | 国家电网公司 | Intelligent control method for switch cabinet handcart and earthing knife switch |
| CN107503620A (en) * | 2017-10-17 | 2017-12-22 | 东莞市天纳科汽车自动化有限公司 | A kind of push rod controller |
| CN107817732A (en) * | 2017-11-28 | 2018-03-20 | 美尚生态景观股份有限公司 | A kind of wireless electric saw control system |
| CN108988623A (en) * | 2018-08-23 | 2018-12-11 | 深圳市弘粤驱动有限公司 | A kind of short-circuit protection of external load |
| CN110601616A (en) * | 2019-10-16 | 2019-12-20 | 南京盛伯智能科技有限公司 | Direct current brush motor driver |
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Application publication date: 20130911 |