CN105553343A - Capacitor-free direct-current brushless driving controller - Google Patents
Capacitor-free direct-current brushless driving controller Download PDFInfo
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- CN105553343A CN105553343A CN201510064103.9A CN201510064103A CN105553343A CN 105553343 A CN105553343 A CN 105553343A CN 201510064103 A CN201510064103 A CN 201510064103A CN 105553343 A CN105553343 A CN 105553343A
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Abstract
The invention relates to a direct-current brushless driver, particularly to a capacitor-free direct-current brushless driving controller comprising an EMI circuit, a rectifier circuit, an IGBT module circuit, an IGBT drive circuit, a control power supply, a voltage and current collecting circuit and a counter-electromotive-force detecting circuit. The EMI circuit is connected with the rectifier circuit connected with the control power supply; the voltage and current collecting circuit and the IGBT module circuit are connected with the IGBT drive circuit; the counter-electromotive-force detecting circuit is connected with the motor; and the microprocessor is connected with the control power supply, the voltage and current collecting circuit, the IGBT drive circuit, and the counter-electromotive-force detecting circuit. In terms of the size, compared with the size of equipment with capacitor-included control, the size of equipment with capacitor-free control is reduced by almost 30%; and in terms of the weight, compared with the weight of equipment with capacitor-included control, the weight of equipment with capacitor-free control is reduced about 25%. Therefore, the large space is saved for the inside of the driver; and the possibility is provided for manufacturing a miniature electric tool or integrated electromechanical device.
Description
Technical field
The present invention relates to brush DC driver, is without the brushless driving governor of capacitor DC specifically.
Background technology
At present, the many employings of electric tool are brushless, and driver controls, usually multiple large size electro electrolysis condenser is adopted in existing brushless internal drive circuit, because electrochemical capacitor itself should not work in high temperature environments, high temperature makes lifetime or the inefficacy of capacitor, the potential safety hazard such as also to blast time serious.Therefore not only driver design requires high to heat dispersion, also directly affects the whole service life of driver.On the other hand, because bulky capacitor volume is bigger than normal, will give to install or safeguard and bring difficulty, legacy drive must adopt independent mounting means, cannot be applicable to small-sized electric tool or integrated electromechanical equipment.
Summary of the invention
For above-mentioned technical problem, the invention provides one and improve the driver life-span, reduce driver volume, reduce manufacturing cost without the brushless driving governor of capacitor DC.
The present invention solves the problems of the technologies described above adopted technical scheme: a kind of without the brushless driving governor of capacitor DC, comprise EMI circuit, rectification circuit, IGBT module circuit, IGBT drive circuit, control power supply, electric current and voltage Acquisition Circuit and back electromotive force circuit for detecting, described EMI circuit is connected with rectification circuit, rectification circuit is connected with control power supply, electric current and voltage Acquisition Circuit, IGBT module circuit connects, IGBT module circuit is all connected with IGBT drive circuit, back electromotive force circuit for detecting is connected with motor, microprocessor respectively with control power supply, electric current and voltage Acquisition Circuit, IGBT drive circuit, back electromotive force circuit for detecting connects.
As preferably, described EMI circuit comprises piezo-resistance and the safety electric capacity of electrical connection, and the AC power of input exports described rectification circuit to after piezo-resistance and the process of safety electric capacity.
As preferably, the rectifier bridge that four diodes that described rectification circuit comprises electrical connection are formed and an electric capacity, the alternating current entering this rectification circuit is delivered to described electric current and voltage Acquisition Circuit after rectifier bridge and capacitance rectifier.
As preferably, described electric current and voltage Acquisition Circuit comprises three resistance and an operational amplifier composition of electrical connection, and the voltage and current signal of collection processes by feeding back to microprocessor after operational amplifier process.
As preferably, the control signal sent from microprocessor is supplied to IGBT module circuit after IGBT drive circuit shaping.
As preferably, IGBT module circuit comprises five integrated power models of triode of electrical connection, and it exports three-phase electricity to motor device.
As preferably, back electromotive force circuit for detecting comprises another operational amplifier, and three phase feedback signals exported from IGBT module circuit are processed by microprocessor after amplifying process.
As preferably, described control power supply is described microprocessor, IGBT module circuit, IGBT drive circuit provide power supply.
As preferably, described controller is hermetically sealed encapsulating integral structure, the anti-paint of the first spray insulation three of its pcb board, then adopts casting glue to reinforce on integrated electric instrument.
As preferably, the protective circuit of described controller adopts the triple protection of DC bus current, DC bus-bar voltage and radiator temperature.
The present invention is compared with prior art: from volume, has Capacity control to reduce 30% nearly without capacity ratio; From weight, Capacity control is had to reduce about 25% without capacity ratio; Therefore above 2 save large quantity space, for manufacture small-sized electric tool or integrated electromechanical equipment provide possibility for internal drive.From the life-span, according to electrochemical capacitor at high temperature useful life formula to calculating, under 75 degree celsius temperature, capacitor only only has 6000h useful life, is about 250 days.Therefore the useful life of driver will greatly be extended without capacitive way.From cost, high withstand voltage, the electrochemical capacitor market price of high capacitance is partially expensive, generally accounts for 10% of driver total cost.Certainly will reduce product cost without capacitive way, and reduce and produce and maintenance difficulties.
Accompanying drawing explanation
Fig. 1 is system block diagram of the present invention.
Fig. 2 is circuit theory diagrams of the present invention.
Fig. 3 is the structural representation of pcb board of the present invention.
Embodiment
Below in conjunction with Fig. 1, Fig. 2, Fig. 3 introduces of the present invention without the brushless driving governor of capacitor DC in detail, it comprises EMI circuit 1, rectification circuit 2, IGBT module circuit 3, IGBT drive circuit 4, control power supply 5, electric current and voltage Acquisition Circuit 6 and back electromotive force circuit for detecting 7, described EMI circuit is connected with rectification circuit, rectification circuit is connected with control power supply, electric current and voltage Acquisition Circuit, IGBT module circuit connects, IGBT module circuit is all connected with IGBT drive circuit, back electromotive force circuit for detecting is connected with motor 8, microprocessor 9 respectively with control power supply, electric current and voltage Acquisition Circuit, IGBT drive circuit, back electromotive force circuit for detecting connects.
In the present invention, EMI circuit is made up of ZNR piezo-resistance in Fig. 2 and C1 safety electric capacity, in order to absorb surge voltage and to suppress conducted interference; Rectification circuit is made up of D1 and C2 in Fig. 2, makes alternating voltage become pulsating dc voltage, the non-large electrochemical capacitor of C2, only uses resistant to elevated temperatures polypropylene capactive to remove electrical network clutter; Controlling power supply to be made up of precision switch power supply control chip U1, is microprocessor, IGBT module circuit, and IGBT drive circuit etc. provide power supply; Electric current and voltage Acquisition Circuit is made up of R1, R2, R3 and U2 operational amplifier, and voltage and current signal processes by feeding back to microprocessor after operational amplifier process; IGBT drive circuit is made up of U3, and the control signal sent from microprocessor is supplied to IGBT module circuit after drive circuit shaping; IGBT module circuit is made up of the integrated power model of Q1, Q2, Q3, Q4, Q5, Q6, and export three-phase U, V, W export to motor device; Back electromotive force circuit for detecting is made up of U4 operational amplifier, processes after amplifying process from the signal of U, V, W three-phase feedback to microprocessor.
Controller software of the present invention does not adopt general general brushless drived control mode, and adopts microprocessor to carry out high accuracy control, makes dynamic compensation, and the low then pulsewidth of voltage strengthens, and voltage height then pulsewidth reduces.Control chip adopts the special 32-bit microprocessor of motor.After system electrification, first enter the initialization of system and parameters, wait for powering on stable, then motor starts according to setup parameter, and program now enters major cycle, and by speed setting, rotating speed PI has regulated speed to export.Wherein main program interrupts for PWM cycle interruption, reads busbar voltage instantaneous value on the one hand and carries out digitized processing, obtain 2 zero crossings and the wave crest point of pulse voltage, then read by current sample, the links such as speed changes input, voltage compensation, the compensation of PI electric current loop upgrade PWM and export.On the other hand, program divides syllogic starter motor, starts time-out and then increases starting resistor, not overtime, enter back electromotive force and detect commutation interruption, then carry out turn count, back-emf compensation angle calculation etc., enter commutation timer interruption commutation operation, then return main program.
In implementation process, controller control mode adopts without Hall's mode, and brushless motor controller and external cabling only have power line and DC brushless motor line; Protective circuit adopts the triple protection of DC bus current, DC bus-bar voltage and radiator temperature.Controller is hermetically sealed encapsulating integral structure, the anti-paint of brushless driving PCB plate 10 first spray insulation three, then adopts the casting glue of good heat conductivity to reinforce on integrated electric instrument.Therefore have good insulation property and heat conductivility, anti-seismic performance also has significant increase in addition.Controller PCB plate is reduced size, formulates for coordinating electric tool motor bonnet given shape.
Again through bulky capacitor filtering voltage regulation mode after the AC rectification of controller abandoning tradition of the present invention, and use the high withstand voltage CBB thin-film capacitor of single low capacity to substitute, namely the direct current after AC rectification directly supplies three phase full bridge IGBT drive circuit, the supply of its energy and storage rely on special high accuracy control mode dynamically to make up, controlled to make dynamic compensation in motor operation by microprocessor, the low then pulsewidth of voltage strengthens, voltage height then pulsewidth reduces, after adopting this kind of control mode, the mode processed after can replacing traditional large electrochemical capacitor smothing filtering, therefore under avoiding Yin Gaowen, capacitor life-span is short, the unsteadiness such as loss or blast factor.This driver has been compared Capacity control mode, greatly will improve input power factor, and decrease reactive power, and improve the quality of power supply without electric capacity, reduces electric energy loss, can also improve power supply unit utilance.
Above-mentioned execution mode is used for illustrative purposes only, and be not limitation of the present invention, the those of ordinary skill of relevant technical field, without departing from the spirit and scope of the present invention, can also make various change and modification, therefore all equivalent technical schemes also should belong to category of the present invention.
Claims (10)
1. one kind without the brushless driving governor of capacitor DC, comprise EMI circuit, rectification circuit, IGBT module circuit, IGBT drive circuit, control power supply, electric current and voltage Acquisition Circuit and back electromotive force circuit for detecting, described EMI circuit is connected with rectification circuit, rectification circuit is connected with control power supply, electric current and voltage Acquisition Circuit, IGBT module circuit connects, IGBT module circuit is all connected with IGBT drive circuit, back electromotive force circuit for detecting is connected with motor, microprocessor respectively with control power supply, electric current and voltage Acquisition Circuit, IGBT drive circuit, back electromotive force circuit for detecting connects.
2. controller according to claim 1, is characterized in that: described EMI circuit comprises piezo-resistance and the safety electric capacity of electrical connection, and the AC power of input exports described rectification circuit to after piezo-resistance and the process of safety electric capacity.
3. controller according to claim 2, it is characterized in that: the rectifier bridge that four diodes that described rectification circuit comprises electrical connection are formed and an electric capacity, the alternating current entering this rectification circuit is delivered to described electric current and voltage Acquisition Circuit after rectifier bridge and capacitance rectifier.
4. controller according to claim 3, it is characterized in that: described electric current and voltage Acquisition Circuit comprises three resistance and an operational amplifier composition of electrical connection, and the voltage and current signal of collection processes by feeding back to microprocessor after operational amplifier process.
5. controller according to claim 4, is characterized in that: the control signal sent from microprocessor is supplied to IGBT module circuit after IGBT drive circuit shaping.
6. controller according to claim 5, is characterized in that: IGBT module circuit comprises six integrated power models of triode of electrical connection, and it exports three-phase electricity to motor device.
7. controller according to claim 6, is characterized in that: back electromotive force circuit for detecting comprises another operational amplifier, and three phase feedback signals exported from IGBT module circuit are processed by microprocessor after amplifying process.
8. controller according to claim 1, is characterized in that: described control power supply is described microprocessor, IGBT module circuit, IGBT drive circuit provide power supply.
9. controller according to claim 1, is characterized in that: described controller is hermetically sealed encapsulating integral structure, the anti-paint of the first spray insulation three of its pcb board, then adopts casting glue to reinforce on integrated electric instrument.
10. controller according to claim 1, is characterized in that: the protective circuit of described controller adopts the triple protection of DC bus current, DC bus-bar voltage and radiator temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510064103.9A CN105553343A (en) | 2015-02-06 | 2015-02-06 | Capacitor-free direct-current brushless driving controller |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510064103.9A CN105553343A (en) | 2015-02-06 | 2015-02-06 | Capacitor-free direct-current brushless driving controller |
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| Publication Number | Publication Date |
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| CN105553343A true CN105553343A (en) | 2016-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510064103.9A Pending CN105553343A (en) | 2015-02-06 | 2015-02-06 | Capacitor-free direct-current brushless driving controller |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108233787A (en) * | 2018-01-03 | 2018-06-29 | 江苏华频电子科技有限公司 | The control system for non-brush direct currunt electromotors without pfc circuit |
| CN108702111A (en) * | 2017-05-17 | 2018-10-23 | 深圳和而泰智能控制股份有限公司 | A kind of brushless electric tool |
| WO2020073463A1 (en) * | 2018-10-10 | 2020-04-16 | 深圳拓邦股份有限公司 | Electronic device and electrical tool |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102307034A (en) * | 2011-09-15 | 2012-01-04 | 威海克莱特机电有限公司 | Driving device of integrated brushless direct current motor |
| JP2013179833A (en) * | 2007-12-10 | 2013-09-09 | Panasonic Corp | Electric compressor and household electrical appliance |
| CN104084934A (en) * | 2014-07-03 | 2014-10-08 | 长沙启科电子有限公司 | Novel intelligent control direct-current brushless electric pick |
| CN204539016U (en) * | 2015-02-06 | 2015-08-05 | 长沙启科电子有限公司 | A kind of without the brushless driving governor of capacitor DC |
-
2015
- 2015-02-06 CN CN201510064103.9A patent/CN105553343A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013179833A (en) * | 2007-12-10 | 2013-09-09 | Panasonic Corp | Electric compressor and household electrical appliance |
| CN102307034A (en) * | 2011-09-15 | 2012-01-04 | 威海克莱特机电有限公司 | Driving device of integrated brushless direct current motor |
| CN104084934A (en) * | 2014-07-03 | 2014-10-08 | 长沙启科电子有限公司 | Novel intelligent control direct-current brushless electric pick |
| CN204539016U (en) * | 2015-02-06 | 2015-08-05 | 长沙启科电子有限公司 | A kind of without the brushless driving governor of capacitor DC |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108702111A (en) * | 2017-05-17 | 2018-10-23 | 深圳和而泰智能控制股份有限公司 | A kind of brushless electric tool |
| CN108233787A (en) * | 2018-01-03 | 2018-06-29 | 江苏华频电子科技有限公司 | The control system for non-brush direct currunt electromotors without pfc circuit |
| WO2020073463A1 (en) * | 2018-10-10 | 2020-04-16 | 深圳拓邦股份有限公司 | Electronic device and electrical tool |
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Application publication date: 20160504 |
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