CN202602583U - Three-phase half-wave brushless DC (direct current) motor controller with reverse connection protection function - Google Patents
Three-phase half-wave brushless DC (direct current) motor controller with reverse connection protection function Download PDFInfo
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- CN202602583U CN202602583U CN2012202081014U CN201220208101U CN202602583U CN 202602583 U CN202602583 U CN 202602583U CN 2012202081014 U CN2012202081014 U CN 2012202081014U CN 201220208101 U CN201220208101 U CN 201220208101U CN 202602583 U CN202602583 U CN 202602583U
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Abstract
The utility model discloses a three-phase half-wave brushless DC (direct current) motor controller with a reverse connection protection function, which comprises a brushless DC motor, a rotor position detection circuit, a microcontroller, a power device drive circuit, a three-phase half-wave inverter, a follow-current control circuit and a reverse connection protection circuit. The three-phase half-wave brushless DC motor controller with a reverse connection protection function, disclosed by the utility model, can provide a good follow-current channel for the winding energy storage of the brushless DC motor through the follow-current control circuit when an inverter power switch device is turned off, and effectively avoids the problem of electromagnetic interference caused by relatively high induced potential; and through the reverse connection protection circuit of the power supply, the high-current fault caused by reverse connection of the polarity of the power supply can be avoided.
Description
Technical field
The utility model relates to a kind of motor control assembly, relates in particular to a kind of three-phase semiwave brushless direct current motor controller with reverse connecting protection function.
Background technology
Adopt the brshless DC motor system of three-phase semiwave topological structure, it is simple to have a control system major loop structure, and reliability is high, does not have advantages such as shoot through fault, is highly suitable for the industrial applications that system reliability is had relatively high expectations.Yet traditional three-phase semiwave brshless DC motor system can produce higher winding inductance electromotive force when device for power switching turn-offs, be prone to cause comparatively serious electromagnetic interference problem.And conventional brshless DC motor system does not possess power supply reverse connecting protection function, therefore in case when error-polarity connection of power supply took place, power supply can form path through device for power switching inner counter parallel connection fly-wheel diode, produces big electric current, threatens system safety.
The utility model content
The purpose of the utility model in order to solve the problem that above-mentioned prior art exists, provides a kind of three-phase semiwave brushless direct current motor controller with reverse connecting protection function exactly, can accelerate the speed that connects.
In order to achieve the above object, the utility model has adopted following technical scheme: a kind of three-phase semiwave brushless direct current motor controller with reverse connecting protection function links to each other with positive source, power cathode; Comprise brshless DC motor, rotor position detection circuit, microcontroller, power device drive circuit, three-phase semiwave inverter, afterflow control circuit and reverse-connection protection circuit; The input of rotor position detection circuit is connected brshless DC motor, and output connects microcontroller; The output of microcontroller connects the power device drive circuit; The output of power device drive circuit connects the three-phase semiwave inverter; The three-phase semiwave inverter comprises the device for power switching of three parallel connections, three device for power switching respectively with the three-phase windings in series of brshless DC motor; The afterflow control circuit comprises three sub-circuit, three sub-circuit respectively with the three-phase windings in series of brshless DC motor; The input of reverse-connection protection circuit connects the three-phase semiwave inverter, and output connects power cathode.
Three device for power switching in the described three-phase semiwave inverter are three triodes.
Three sub-circuit in the described afterflow control circuit are made up of a triode and a diode series connection respectively.
Described reverse-connection protection circuit is the reverse connecting protection diode circuit.
The three-phase semiwave brushless direct current motor controller that the utlity model has the reverse connecting protection function is through special freewheeling circuit design; Can be that the energy storage of brshless DC motor winding provides good afterflow path when the inverter power switching device turn-offs, effectively avoid because the electromagnetic interference problem that higher induced potential causes.Simultaneously, this controller has power supply reverse connecting protection function, can avoid because the big current failure that error-polarity connection of power supply causes.
Description of drawings
Fig. 1 is the overall structure sketch map that the utlity model has the three-phase semiwave brushless direct current motor controller of reverse connecting protection function.
Embodiment
Referring to Fig. 1, the three-phase semiwave brushless direct current motor controller with reverse connecting protection function of the utility model links to each other with positive source, power cathode; Comprise brshless DC motor 1, rotor position detection circuit 2, microcontroller 7, power device drive circuit 6, three-phase semiwave inverter 4, afterflow control circuit 3 and reverse-connection protection circuit 5.The input of rotor position detection circuit 2 is connected brshless DC motor 1, and output connects microcontroller 7; 7 outputs of microcontroller connect power device drive circuit 6; The output of power device drive circuit 6 connects three-phase semiwave inverter 4; Three-phase semiwave inverter 4 comprises the device for power switching of three parallel connections, three device for power switching respectively with the three-phase windings in series of brshless DC motor; Three device for power switching in the utility model are three triode T4, T5, T6; Wherein, Triode T4 connects with the A phase winding of brshless DC motor, and triode T5 connects with the B phase winding of brshless DC motor, and triode T6 connects with the C phase winding of brshless DC motor.Afterflow control circuit 3 comprises three sub-circuit, three sub-circuit respectively with the three-phase windings in series of brshless DC motor; Three sub-circuit are made up of a triode and a diode series connection respectively.Wherein, triode T1 and diode D1 connect with the A phase winding of brshless DC motor, and triode T2 and diode D2 connect with the B phase winding of brshless DC motor, and triode T3 and diode D3 connect with the C phase winding of brshless DC motor.The input of reverse-connection protection circuit 5 connects three-phase semiwave inverter 4, and output connects power cathode.Reverse-connection protection circuit in the utility model is reverse connecting protection diode circuit D4.
The operation principle and the function thereof of the utility model are:
1, when the DC power supply both positive and negative polarity correctly is connected to controller, microcontroller is according to three-phase semiwave control algolithm output three-phase inverter device for power switching control signal.This signal exports three-phase inverter device for power switching gate pole to and is used to control each phase winding conducting phase sequence of motor and carries out pulse-width modulation after the power device drive circuit amplifies.
2, when the device for power switching conducting, power supply will be through motor windings, inverter power switching device that is connected with this motor windings and power supply reverse connecting protection diode formation work loop.When device for power switching turn-offs, the energy that is stored in the motor windings will carry out afterflow through the release loop that motor windings and corresponding afterflow control circuit constitute.
3, when DC power supply generation error-polarity connection since power supply reverse connecting protection diode reverse connect can not conducting, make electric current can't form the loop, thereby played the effect of protection controller.Above-mentioned freewheeling circuit design and power supply reverse connecting protection method are equally applicable to DC MOTOR CONTROL.
Claims (4)
1. the three-phase semiwave brushless direct current motor controller with reverse connecting protection function links to each other with positive source, power cathode; It is characterized in that: comprise brshless DC motor, rotor position detection circuit, microcontroller, power device drive circuit, three-phase semiwave inverter, afterflow control circuit and reverse-connection protection circuit; The input of rotor position detection circuit is connected brshless DC motor, and output connects microcontroller; The output of microcontroller connects the power device drive circuit; The output of power device drive circuit connects the three-phase semiwave inverter; The three-phase semiwave inverter comprises the device for power switching of three parallel connections, three device for power switching respectively with the three-phase windings in series of brshless DC motor; The afterflow control circuit comprises three sub-circuit, three sub-circuit respectively with the three-phase windings in series of brshless DC motor; The input of reverse-connection protection circuit connects the three-phase semiwave inverter, and output connects power cathode.
2. the three-phase semiwave brushless direct current motor controller with reverse connecting protection function according to claim 1 is characterized in that: three device for power switching in the described three-phase semiwave inverter are three triodes.
3. the three-phase semiwave brushless direct current motor controller with reverse connecting protection function according to claim 1 is characterized in that: three sub-circuit in the described afterflow control circuit are made up of a triode and a diode series connection respectively.
4. the three-phase semiwave brushless direct current motor controller with reverse connecting protection function according to claim 1 is characterized in that: described reverse-connection protection circuit is the reverse connecting protection diode circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202081014U CN202602583U (en) | 2012-05-09 | 2012-05-09 | Three-phase half-wave brushless DC (direct current) motor controller with reverse connection protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202081014U CN202602583U (en) | 2012-05-09 | 2012-05-09 | Three-phase half-wave brushless DC (direct current) motor controller with reverse connection protection function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202602583U true CN202602583U (en) | 2012-12-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012202081014U Expired - Lifetime CN202602583U (en) | 2012-05-09 | 2012-05-09 | Three-phase half-wave brushless DC (direct current) motor controller with reverse connection protection function |
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| CN (1) | CN202602583U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102664575A (en) * | 2012-05-09 | 2012-09-12 | 上海日用-友捷汽车电气有限公司 | Three-phase half-wave brushless direct-current motor controller with reverse connection protection function |
-
2012
- 2012-05-09 CN CN2012202081014U patent/CN202602583U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102664575A (en) * | 2012-05-09 | 2012-09-12 | 上海日用-友捷汽车电气有限公司 | Three-phase half-wave brushless direct-current motor controller with reverse connection protection function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121212 |
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| CX01 | Expiry of patent term |