CN203554356U - MOS tube drive circuit of motor controller - Google Patents
MOS tube drive circuit of motor controller Download PDFInfo
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- CN203554356U CN203554356U CN201320683737.9U CN201320683737U CN203554356U CN 203554356 U CN203554356 U CN 203554356U CN 201320683737 U CN201320683737 U CN 201320683737U CN 203554356 U CN203554356 U CN 203554356U
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- 239000004065 semiconductor Substances 0.000 claims description 44
- 238000006243 chemical reaction Methods 0.000 abstract 2
- 230000005693 optoelectronics Effects 0.000 abstract 2
- 238000005516 engineering process Methods 0.000 description 3
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Abstract
The utility model provides a MOS tube drive circuit of a motor controller, and relates to the technical field of motor control. The MOS tube drive circuit is composed of a duty ratio signal conversion circuit and a signal drive circuit. The duty ratio signal conversion circuit comprises two voltage comparators and one optoelectronic coupler. The output ends of the comparators IC1 and IC2 are connected with a second pin and a third pin of the optoelectronic coupler. The signal drive circuit comprises a drive chip IR2112, two totem pole circuits, a bootstrap capacitor C1 and a diode D1. The MOS tube drive circuit of the motor controller is economical in control chip resources, high in signal anti-interference capability and high in drive capability.
Description
Technical field
The utility model relates to electric machines control technology field, says in detail it is a kind of resource of saving control chip, the metal-oxide-semiconductor drive circuit of the electric machine controller that driving force is strong.
Background technology
We know, in motor controller drive circuit, can use metal-oxide-semiconductor as switch element, and switch element is generally the bridge circuit of two groups of metal-oxide-semiconductor compositions.By apply the adjustable driving signal of duty ratio at the grid of metal-oxide-semiconductor, just can control the make-and-break time of metal-oxide-semiconductor, and then the adjustable voltage signal of output size.For the drive circuit of asynchronous machine controller, three groups of bridge circuits of common needs regulate the size of three-phase voltage signal, every group of bridge circuit needs two-way pwm control signal to control respectively bridge metal-oxide-semiconductor and lower bridge metal-oxide-semiconductor, three groups of bridge circuits need six road pwm control signals, the PWM number of modules of control chip is asked to high, the resource of waste control chip, cost is high.During conducting NMOS pipe, its grid voltage is greater than source class voltage, for the NMOS pipe of upper bridge, what its source class connected conventionally is load end, voltage is generally similar to supply voltage, and now the driving voltage of grid is just greater than supply voltage, needs special booster circuit, increase the complexity of structure, improved manufacturing cost.
Summary of the invention
The purpose of this utility model is to solve above-mentioned the deficiencies in the prior art, provide a kind of Zhi Yong mono-road duty cycle signals (being pwm control signal) to drive two groups of metal-oxide-semiconductors of upper and lower bridge, save the resource of control chip, the metal-oxide-semiconductor drive circuit of the electric machine controller that driving force is strong.
The utility model solves the problems of the technologies described above adopted technical scheme:
A kind of electric machine controller metal-oxide-semiconductor drive circuit, is comprised of duty cycle signals change-over circuit and signal drive circuit, and duty cycle signals change-over circuit comprises two voltage comparators and a photoelectrical coupler, duty cycle signals is received respectively the negative pole of comparator IC1 and the positive pole of comparator IC2 through a current-limiting resistance R1, and the positive pole of comparator IC1 connects reference voltage Vref-1, and the negative pole of comparator IC2 connects reference voltage Vref-2, the output of comparator IC1 and IC2 is received 2 pin and 3 pin of photoelectrical coupler, signal drive circuit comprises driving chip I R2112, two totem-pote circuits, bootstrap capacitor C1 and diode D1, two output pin 7 pin of photoelectrical coupler and 6 pin are received respectively and are driven the low side of chip I R2112 to input 14 pin and high-end input 12 pin, drive the low side of chip I R2112 to export 1 pin to receive through current-limiting resistance R8 the grid of totem-pote circuit one, totem-pote circuit one is comprised of NPN type triode Q1 and positive-negative-positive triode Q2, the drain electrode of Q1 is received 15V voltage through resistance R 7, the source ground of Q2, the source class of Q1 is connected with the drain electrode of Q2, the signal producing is for driving the lower bridge metal-oxide-semiconductor of bridge circuit, drive high-end output 8 pin of chip I R2112 through current-limiting resistance R9, to receive the grid of totem-pote circuit two, totem-pote circuit two is comprised of NPN type triode Q3 and positive-negative-positive triode Q4,7 pin that drive chip I R2112 are received in the drain electrode of Q3, receive one end of bootstrap capacitor C1, the other end of bootstrap capacitor C1 is received 6 pin of IR2112 simultaneously, the source electrode of Q4 is received the source class of driven upper bridge metal-oxide-semiconductor and is driven 6 pin of chip I R2112, and the source class of Q3 is connected with the drain electrode of Q4, and the signal of generation is for driving the upper bridge metal-oxide-semiconductor of bridge circuit, 1 pin, 4 pin and 8 pin of photoelectrical coupler connect 5V voltage through resistance R 2, R3, R4 respectively, 5 pin ground connection, 2 pin, the 15 pin ground connection that drive chip I R2112,3 pin connect 15V voltage through resistance R 7, and 11 pin connect 5V voltage through resistance R 4.
13 pin of driving chip I R2112 described in the utility model connect a cut-off signals.This signal can have controller master chip or other peripheral circuits to produce, the output being used for when having fault to occur at reliable turn-off IR2112, protection system.
7 pin of the photoelectrical coupler described in the utility model connect 5V voltage through resistance R 6, R4, and 6 pin connect 5V voltage through resistance R 5, R4.Make to be input to the performance optimal of the duty cycle signals that drives chip I R2112.
During work, controller sends Yi road pwm signal, when pwm signal is high level, and IC1 output low level, IC2 exports high level.This two paths of signals passes through again photoelectrical coupler, has strengthened driving force and the antijamming capability of signal.7 pin output low levels of photoelectrical coupler, 6 pin output high level, these two output signals are given to respectively the high low side input of driver IR2112.When the cut-off signals of IR2112 is low level, it is low level that the low side of IR2112 is exported 1 pin, and after connection totem-pote circuit, producing metal-oxide-semiconductor driving signal is low level, and lower bridge metal-oxide-semiconductor is closed; High-end output 8 pin of IR2112 are high level, and after connection totem-pote circuit, producing metal-oxide-semiconductor driving signal is high level, and bridge metal-oxide-semiconductor is opened.When pwm signal is low level, situation is contrary, and final result is that upper bridge metal-oxide-semiconductor is closed, and lower bridge metal-oxide-semiconductor is opened.When the cut-off signals of IR2112 is high level, the low side of IR2112 is exported 1 pin and all output low levels of high-end output 8 pin, and upper and lower bridge metal-oxide-semiconductor all turn-offs.
The utility model Zhi Yong mono-road duty cycle signals drives two groups of metal-oxide-semiconductors of upper and lower bridge arm, the resource of having saved control chip.Duty cycle signals, through light-coupled isolation, strengthens the antijamming capability of signal.Adopt IR2112 and two-way totem-pote circuit in conjunction with driving two-way brachium pontis, upper bridge drives and adopts outside bootstrap capacitor to power on, and driving force strengthens greatly.When duty cycle signals is low level, the node capacitance that the lower pipe of totem-pote circuit is MOS provides discharge loop, has reduced metal-oxide-semiconductor turn-off decay time.After 13 pin of driving chip I R2112 connect a cut-off signals, there is driving defencive function, when controller runs into fault, can turn-off in time metal-oxide-semiconductor, protection system.
Accompanying drawing explanation
fig. 1 is the schematic diagram of circuit structure of the present utility model.
Embodiment
Electric machine controller metal-oxide-semiconductor drive circuit as shown in the figure, is comprised of duty cycle signals change-over circuit and signal drive circuit, and duty cycle signals change-over circuit comprises two voltage comparators and a photoelectrical coupler, duty cycle signals is received respectively the negative pole of comparator IC1 and the positive pole of comparator IC2 through a current-limiting resistance R1, and the positive pole of comparator IC1 connects reference voltage Vref-1, and the negative pole of comparator IC2 connects reference voltage Vref-2, the output of comparator IC1 and IC2 is received 2 pin and 3 pin of photoelectrical coupler, signal drive circuit comprises driving chip I R2112, two totem-pote circuits, bootstrap capacitor C1 and diode D1, two output pin 7 pin of photoelectrical coupler and 6 pin are received respectively and are driven the low side of chip I R2112 to input 14 pin and high-end input 12 pin, drive the low side of chip I R2112 to export 1 pin to receive through current-limiting resistance R8 the grid of totem-pote circuit one, totem-pote circuit one is comprised of NPN type triode Q1 and positive-negative-positive triode Q2, the drain electrode of Q1 is received 15V voltage through resistance R 7, the source ground of Q2, the source class of Q1 is connected with the drain electrode of Q2, the signal producing is for driving the lower bridge metal-oxide-semiconductor of bridge circuit, drive high-end output 8 pin of chip I R2112 through current-limiting resistance R9, to receive the grid of totem-pote circuit two, totem-pote circuit two is comprised of NPN type triode Q3 and positive-negative-positive triode Q4,7 pin that drive chip I R2112 are received in the drain electrode of Q3, receive one end of bootstrap capacitor C1, the other end of bootstrap capacitor C1 is received 6 pin of IR2112 simultaneously, the source electrode of Q4 is received the source class of driven upper bridge metal-oxide-semiconductor and is driven 6 pin of chip I R2112, and the source class of Q3 is connected with the drain electrode of Q4, and the signal of generation is for driving the upper bridge metal-oxide-semiconductor of bridge circuit, 1 pin, 4 pin and 8 pin of photoelectrical coupler connect 5V voltage through resistance R 2, R3, R4 respectively, 5 pin ground connection, 2 pin, the 15 pin ground connection that drive chip I R2112,3 pin connect 15V voltage through resistance R 7, and 11 pin connect 5V voltage through resistance R 4.Drive 13 pin of chip I R2112 to connect a cut-off signals.This signal can have controller master chip or other peripheral circuits to produce, the output being used for when having fault to occur at reliable turn-off IR2112, protection system.7 pin of photoelectrical coupler connect 5V voltage through resistance R 6, R4, and 6 pin connect 5V voltage through resistance R 5, R4.Make to be input to the performance optimal of the duty cycle signals that drives chip I R2112.The type selecting of each components and parts is: R1=47K, R2=470 Ω, R3=470 Ω, R4=20 Ω, R5=1K, R6=1K, R7=10 Ω, R8=150 Ω, R9=150 Ω, C1 select the electric capacity of 330uF/16V,, D1 selects RS1D diode.
During work, controller sends Yi road pwm signal, when pwm signal is high level, and IC1 output low level, IC2 exports high level.This two paths of signals passes through again photoelectrical coupler, has strengthened driving force and the antijamming capability of signal.7 pin output low levels of photoelectrical coupler, 6 pin output high level, these two output signals are given to respectively the high low side input of driver IR2112.When the cut-off signals of IR2112 is low level, it is low level that the low side of IR2112 is exported 1 pin, and after connection totem-pote circuit, producing metal-oxide-semiconductor driving signal is low level, and lower bridge metal-oxide-semiconductor is closed; High-end output 8 pin of IR2112 are high level, and after connection totem-pote circuit, producing metal-oxide-semiconductor driving signal is high level, and bridge metal-oxide-semiconductor is opened.When pwm signal is low level, situation is contrary, and final result is that upper bridge metal-oxide-semiconductor is closed, and lower bridge metal-oxide-semiconductor is opened.When the cut-off signals of IR2112 is high level, the low side of IR2112 is exported 1 pin and all output low levels of high-end output 8 pin, and upper and lower bridge metal-oxide-semiconductor all turn-offs.
The utility model Zhi Yong mono-road duty cycle signals drives two groups of metal-oxide-semiconductors of upper and lower bridge arm, the resource of having saved control chip.Duty cycle signals, through light-coupled isolation, strengthens the antijamming capability of signal.Adopt IR2112 and two-way totem-pote circuit in conjunction with driving two-way brachium pontis, upper bridge drives and adopts outside bootstrap capacitor to power on, and driving force strengthens greatly.When duty cycle signals is low level, the node capacitance that the lower pipe of totem-pote circuit is MOS provides discharge loop, has reduced metal-oxide-semiconductor turn-off decay time.After 13 pin of driving chip I R2112 connect a cut-off signals, there is driving defencive function, when controller runs into fault, can turn-off in time metal-oxide-semiconductor, protection system.
Claims (3)
1. an electric machine controller metal-oxide-semiconductor drive circuit, is comprised of duty cycle signals change-over circuit and signal drive circuit, it is characterized in that duty cycle signals change-over circuit comprises two voltage comparators and a photoelectrical coupler, duty cycle signals is received respectively the negative pole of comparator IC1 and the positive pole of comparator IC2 through a current-limiting resistance R1, and the positive pole of comparator IC1 connects reference voltage Vref-1, and the negative pole of comparator IC2 connects reference voltage Vref-2, the output of comparator IC1 and IC2 is received 2 pin and 3 pin of photoelectrical coupler, signal drive circuit comprises driving chip I R2112, two totem-pote circuits, bootstrap capacitor C1 and diode D1, two output pin 7 pin of photoelectrical coupler and 6 pin are received respectively and are driven the low side of chip I R2112 to input 14 pin and high-end input 12 pin, drive the low side of chip I R2112 to export 1 pin to receive through current-limiting resistance R8 the grid of totem-pote circuit one, totem-pote circuit one is comprised of NPN type triode Q1 and positive-negative-positive triode Q2, the drain electrode of Q1 is received 15V voltage through resistance R 7, the source ground of Q2, the source class of Q1 is connected with the drain electrode of Q2, the signal producing is for driving the lower bridge metal-oxide-semiconductor of bridge circuit, drive high-end output 8 pin of chip I R2112 through current-limiting resistance R9, to receive the grid of totem-pote circuit two, totem-pote circuit two is comprised of NPN type triode Q3 and positive-negative-positive triode Q4,7 pin that drive chip I R2112 are received in the drain electrode of Q3, receive one end of bootstrap capacitor C1, the other end of bootstrap capacitor C1 is received 6 pin of IR2112 simultaneously, the source electrode of Q4 is received the source class of driven upper bridge metal-oxide-semiconductor and is driven 6 pin of chip I R2112, and the source class of Q3 is connected with the drain electrode of Q4, and the signal of generation is for driving the upper bridge metal-oxide-semiconductor of bridge circuit, 1 pin, 4 pin and 8 pin of photoelectrical coupler connect 5V voltage through resistance R 2, R3, R4 respectively, 5 pin ground connection, 2 pin, the 15 pin ground connection that drive chip I R2112,3 pin connect 15V voltage through resistance R 7, and 11 pin connect 5V voltage through resistance R 4.
2. electric machine controller metal-oxide-semiconductor drive circuit according to claim 1, is characterized in that 13 pin of described driving chip I R2112 connect a cut-off signals.
3. electric machine controller metal-oxide-semiconductor drive circuit according to claim 1 and 2, is characterized in that 7 pin of described photoelectrical coupler connect 5V voltage through resistance R 6, R4, and 6 pin connect 5V voltage through resistance R 5, R4.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320683737.9U CN203554356U (en) | 2013-11-01 | 2013-11-01 | MOS tube drive circuit of motor controller |
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| CN201320683737.9U CN203554356U (en) | 2013-11-01 | 2013-11-01 | MOS tube drive circuit of motor controller |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106178528A (en) * | 2016-08-31 | 2016-12-07 | 北京趣智阿尔法科技有限公司 | Education unmanned plane able to programme |
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- 2013-11-01 CN CN201320683737.9U patent/CN203554356U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106178528A (en) * | 2016-08-31 | 2016-12-07 | 北京趣智阿尔法科技有限公司 | Education unmanned plane able to programme |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: The metal-oxide-semiconductor drive circuit of electric machine controller Effective date of registration: 20151116 Granted publication date: 20140416 Pledgee: Weihai commercial bank Limited by Share Ltd. Pledgor: WEIHAI HHH COOPERATION MACH.&ELEC. CO.,LTD. Registration number: 2015990001004 |
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| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20170919 Granted publication date: 20140416 Pledgee: Weihai commercial bank Limited by Share Ltd. Pledgor: WEIHAI HHH COOPERATION MACH.&ELEC. CO.,LTD. Registration number: 2015990001004 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: The metal-oxide-semiconductor drive circuit of electric machine controller Effective date of registration: 20170920 Granted publication date: 20140416 Pledgee: Weihai City Commercial Bank Limited by Share Ltd. high tech branch Pledgor: WEIHAI HHH COOPERATION MACH.&ELEC. CO.,LTD. Registration number: 2017990000889 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20200528 Granted publication date: 20140416 Pledgee: Weihai City Commercial Bank Limited by Share Ltd. high tech branch Pledgor: WEIHAI HHH COOPERATION MACH.&ELEC. Co.,Ltd. Registration number: 2017990000889 |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140416 |