CN204539016U - A kind of without the brushless driving governor of capacitor DC - Google Patents
A kind of without the brushless driving governor of capacitor DC Download PDFInfo
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- CN204539016U CN204539016U CN201520084341.1U CN201520084341U CN204539016U CN 204539016 U CN204539016 U CN 204539016U CN 201520084341 U CN201520084341 U CN 201520084341U CN 204539016 U CN204539016 U CN 204539016U
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- 239000003990 capacitor Substances 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 claims description 13
- 238000009413 insulation Methods 0.000 claims description 4
- 238000005266 casting Methods 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims description 3
- 239000003973 paint Substances 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
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- Control Of Motors That Do Not Use Commutators (AREA)
- Control Of Direct Current Motors (AREA)
Abstract
The utility model relates to brush DC driver, a kind of without the brushless driving governor of capacitor DC specifically, it comprises 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.From volume, Capacity control is had 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.
Description
Technical field
The utility model 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.
Utility model content
For above-mentioned technical problem, the utility model provides one to improve the driver life-span, reduces driver volume, reduce manufacturing cost without the brushless driving governor of capacitor DC.
The utility model 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 utility model 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 utility model.
Fig. 2 is circuit theory diagrams of the present utility model.
Fig. 3 is the structural representation of pcb board of the present utility model.
Embodiment
Below in conjunction with Fig. 1, Fig. 2, Fig. 3 introduces of the present utility model 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 utility model, 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 utility model 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 the utility model controller abandoning tradition, 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 only for illustration of the utility model, and be not to restriction of the present utility model, the those of ordinary skill of relevant technical field, when not departing from the utility model spirit and scope, can also make various change and modification, therefore all equivalent technical schemes also should belong to category of the present utility model.
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 are connected with IGBT drive circuit respectively, back electromotive force circuit for detecting is connected with motor, and microprocessor is connected with control power supply, electric current and voltage Acquisition Circuit, IGBT drive circuit, back electromotive force circuit for detecting respectively.
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 |
|---|---|---|---|
| CN201520084341.1U CN204539016U (en) | 2015-02-06 | 2015-02-06 | A kind of without the brushless driving governor of capacitor DC |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520084341.1U CN204539016U (en) | 2015-02-06 | 2015-02-06 | A kind of without the brushless driving governor of capacitor DC |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204539016U true CN204539016U (en) | 2015-08-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520084341.1U Expired - Fee Related CN204539016U (en) | 2015-02-06 | 2015-02-06 | A kind of without the brushless driving governor of capacitor DC |
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| Country | Link |
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| CN (1) | CN204539016U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105553343A (en) * | 2015-02-06 | 2016-05-04 | 长沙启科电子有限公司 | Capacitor-free direct-current brushless driving controller |
-
2015
- 2015-02-06 CN CN201520084341.1U patent/CN204539016U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105553343A (en) * | 2015-02-06 | 2016-05-04 | 长沙启科电子有限公司 | Capacitor-free direct-current brushless driving controller |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150805 |