CN202679292U - Common MCU optical coupler drive circuit for PMSM - Google Patents
Common MCU optical coupler drive circuit for PMSM Download PDFInfo
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- CN202679292U CN202679292U CN2012202614911U CN201220261491U CN202679292U CN 202679292 U CN202679292 U CN 202679292U CN 2012202614911 U CN2012202614911 U CN 2012202614911U CN 201220261491 U CN201220261491 U CN 201220261491U CN 202679292 U CN202679292 U CN 202679292U
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Abstract
Provided is a common MCU optical coupler drive circuit for a PMSM. Signals are used for driving a motor through a high speed optical coupler, a driving IC, and an IGBT, wherein the signals are generated by the common MCU (Micro-programmed Control Unit); the common MCU outputs PWM signal pin to be connected with the input pin of the high speed driving optical coupler via a current-limiting resistor; the output pin of the high speed driving optical coupler is directly connected with the IGBT grid plate via a gate pole driving resistor; the output portion of the driving upper bridge arm is provided with a bootstrap capacitor to store energy for a suspension power supply driven by the upper bridge arm IGBT; the output portion of the optical coupler employs a set of +10V-+20V voltage; and the PWM signals are directly output via the high speed drive optical coupler to drive IGBT to operate, thereby making the motor to rotate. As the driving current output by the high speed driving optical coupler can reach 2.5A, a heavy driving current, the problem of insufficient driving current for IGBT can be avoided. The DSP optical coupler drive circuit is secure and reliable, and is capable of effectively reducing the failure rate of the driving circuit, broadening the application scope of the product to power supply and IGBT, and reducing the product cost as well. The DSP optical coupler drive circuit only employs a high-speed driving optical coupler, thereby having a simple circuit structure.
Description
Affiliated technical field
The utility model relates to a kind of permagnetic synchronous motor IGBT drive circuit, especially is applied in the servo-control system of industrial sewing machine.
Background technology
Existing industrial sewing motor servo-controlled system permagnetic synchronous motor drive circuit all adopts DSP (digital signal processor) through high speed photo coupling, drive IC (integrated circuit), IGBT(insulated gate bipolar transistor) come drive motors or DSP through high speed photo coupling, IPM(Intelligent Power Module) come the form of drive motors.The high speed PWM(pulse width modulation that DSP produces) signal is inputted drive IC by high speed photo coupling, and drive IC makes electric machine rotation according to the logical relation output drive signal driving IGBT work of pwm signal; Perhaps the high speed pwm signal of DSP generation makes electric machine rotation by the IPM that high speed photo coupling is input to driver module.Above two kinds type of drive output part all need to have stable+5V and+voltage of 15V, higher to the requirement of power supply, and peripheral circuit is complicated, product cost is too high.The more important thing is, the drive IC gate drive current is smaller, may exist drive current not enough to the driving of certain IGBT, and IGBT and drive IC are punctured, and cause fried plate, so the scope of application of IGBT is wideless, and failure rate is higher.
Summary of the invention
The deficiencies such as the circuit scope of application complicated, IGBT that existing drive circuit exists is wide in order to overcome, failure rate and high expensive, the utility model provides the common MCU optocoupler of a kind of permagnetic synchronous motor drive circuit, this driving circuit structure is simple, IGBT and power supply applied widely, and failure rate and cost are low.
The technical scheme that its technical problem that solves the utility model adopts is: the common MCU optocoupler of permagnetic synchronous motor drive circuit, comprise that signal is through high speed photo coupling, drive IC, IGBT comes drive motors, it is characterized in that: described signal is by common MCU(micro-control unit) produce, common MCU output pwm signal pin is connected with high-speed driving optocoupler input pin by current-limiting resistance, high-speed driving optocoupler output pin directly links to each other with the IGBT screen by gate-drive resistance, brachium pontis output part increases bootstrap capacitor in the driving, suspended power supply stored energy for upper brachium pontis IGBT driving, optocoupler output part with one group+10V-+20V voltage, pwm signal drives IGBT by the direct output drive signal of high-speed driving optocoupler and works and make electric machine rotation.
The beneficial effects of the utility model: because high-speed driving optocoupler output driving current can reach 2.5A, drive current is very large, the problem that can not occur the drive current deficiency to IGBT, safe and reliable, can effectively reduce the failure rate of drive circuit, enlarge product to the scope of application of power supply and IGBT, can reduce product cost again simultaneously.Drive circuit only adopts the high-speed driving optocoupler, and circuit structure is simple.
Description of drawings
Fig. 1 is circuit theory diagrams of the present utility model.
Fig. 2 is the driving circuit principle figure of a half-bridge among Fig. 1.
Fig. 3 is the utility model permagnetic synchronous motor optocoupler drive principle block diagram.
Among the figure: U1 is MCU, and U2 and U3 are the high-speed driving optocoupler, and Q1 is lower brachium pontis IGBT, and Q2 is upper brachium pontis IGBT, and M is permagnetic synchronous motor, and C2 is bootstrap capacitor, and D1 is diode, and R1 and R2 are current-limiting resistance, and R7 and R8 are for driving resistance.
Embodiment
Below in conjunction with accompanying drawing and example the utility model drive circuit is further specified.
Fig. 1 is the driving circuit principle figure of complete permagnetic synchronous motor, is comprised of 3 half-bridge drive circuits, and the driving circuit principle of these 3 half-bridges is identical.
Fig. 2 is the driving circuit principle figure of one of them half-bridge.
In Fig. 2, MCU(U1) be connected with high-speed driving optocoupler (U2, U3) input by current-limiting resistance (R1, R2), high-speed driving optocoupler (U2, U3) output is by driving resistance (R7, R8) and IGBT(Q1, Q2) screen is connected permagnetic synchronous motor (M) and IGBT(Q1, Q2) half-bridge drive circuit of composition is connected.
In Fig. 1, during normal operation, MCU(U1) output 6 road pulse signals drive the signal of lower brachium pontis after high-speed driving optocoupler (U3, U5, U7) isolation is amplified, control IGBT(Q1, Q3, Q5).The signal of brachium pontis carries out the current potential conversion through boostrap circuit after isolating amplification through high-speed driving optocoupler (U2, U4, U6) again in the driving, becomes the driving pulse of 3 road electric potential floatings, control IGBT(Q2, Q4, Q6).
In Fig. 2, bootstrap capacitor (C2) is the suspended power supply stored energy of upper brachium pontis IGBT, and the DC bus-bar voltage the when effect of diode (D1) prevents brachium pontis IGBT conducting is added on high-speed driving optocoupler (U2) power supply and makes device failure.Driving resistance (R7, R8) is IGBT(Q2, Q1) gate-drive resistance.
Claims (1)
1. the common MCU optocoupler of permagnetic synchronous motor drive circuit, comprise that signal is through high speed photo coupling, drive IC, IGBT comes drive motors, it is characterized in that: described signal is by common MCU(micro-control unit) produce, common MCU output pwm signal pin is connected with high-speed driving optocoupler input pin by current-limiting resistance, high-speed driving optocoupler output pin directly links to each other with the IGBT screen by gate-drive resistance, brachium pontis output part increases bootstrap capacitor in the driving, suspended power supply stored energy for upper brachium pontis IGBT driving, optocoupler output part with one group+10V-+20V voltage, pwm signal drives IGBT by the direct output drive signal of high-speed driving optocoupler and works and make electric machine rotation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202614911U CN202679292U (en) | 2012-06-05 | 2012-06-05 | Common MCU optical coupler drive circuit for PMSM |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202614911U CN202679292U (en) | 2012-06-05 | 2012-06-05 | Common MCU optical coupler drive circuit for PMSM |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202679292U true CN202679292U (en) | 2013-01-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012202614911U Expired - Fee Related CN202679292U (en) | 2012-06-05 | 2012-06-05 | Common MCU optical coupler drive circuit for PMSM |
Country Status (1)
| Country | Link |
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| CN (1) | CN202679292U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114301368A (en) * | 2021-12-24 | 2022-04-08 | 兰州飞行控制有限责任公司 | Permanent magnet synchronous motor IPM isolation driving circuit based on vector control |
-
2012
- 2012-06-05 CN CN2012202614911U patent/CN202679292U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114301368A (en) * | 2021-12-24 | 2022-04-08 | 兰州飞行控制有限责任公司 | Permanent magnet synchronous motor IPM isolation driving circuit based on vector control |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: NINGBO YUNSHENG ELECTRONIC CONTROL TECHNOLOGY CO., Effective date: 20140724 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20140724 Address after: 315040 Zhejiang province Ningbo City Jiangdong District Road No. 348 Min'an Patentee after: Ningbo Yunsheng Co., Ltd. Patentee after: NINGBO YUNSHENG ELECTRONIC CONTROL TECHNOLOGY CO., LTD. Address before: 315040 Zhejiang province Ningbo City Jiangdong District Road No. 348 Min'an Patentee before: Ningbo Yunsheng Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130116 Termination date: 20170605 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |