CN204068673U - A kind of high reliability middle low power drive unit - Google Patents
A kind of high reliability middle low power drive unit Download PDFInfo
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- CN204068673U CN204068673U CN201420363912.0U CN201420363912U CN204068673U CN 204068673 U CN204068673 U CN 204068673U CN 201420363912 U CN201420363912 U CN 201420363912U CN 204068673 U CN204068673 U CN 204068673U
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Abstract
The utility model provides a kind of high reliability middle low power drive unit, comprise driver module, power-supplying circuit, power supply supervisory circuit, hardware protection and input circuit, fault-signal testing circuit, fault-signal feedback circuit, driver output circuit, amplitude limit and filter circuit, its driver module is connected with power-supplying circuit, hardware protection and input circuit, fault-signal testing circuit, fault-signal feedback circuit and driver output circuit; Power supply supervisory circuit and power-supplying circuit and hardware protection and input circuit are connected; The output of driver output circuit is connected with amplitude limit and filter circuit, and fault-signal testing circuit is connected with driver output circuit; The output of fault-signal feedback circuit is as the link of the control end with pwm control circuit, and the input of hardware protection and input circuit is as the link of the output with pwm control circuit.IGBT protected by the drive circuit of the utility model high reliability, increases the driving power of IGBT.
Description
Technical field
The utility model relates to a kind of high reliability middle low power drive unit, is particularly widely used in Electric Machine Control, Switching Power Supply, frequency converter and inverter etc. and requires the drive unit in quick, low-loss field.
Background technology
Insulated gate bipolar transistor IGBT (Insulated Gate Bipolar Transistor) is the NEW TYPE OF COMPOSITE voltage control power electronic device combined by BJT and MOSFET, integrate the advantage of MOSFET and GTR, have that input impedance is high, fast response time, on-state voltage drop are little, bear large, the withstand voltage advantages of higher of electric current.Since 20th century, the mid-80 occurred, be widely used in Electric Machine Control, Switching Power Supply, frequency converter and inverter etc. and required quick, low-loss field.Voltage-controlled device only the voltage of control IGBT grid just need can control its turn-on and turn-off, and can maintain lower on-state voltage drop during conducting.But due to the characteristic of IGBT self, make latching effect occur and cause gate pole out of control during its work, or because electric current is excessive or because of overtension or instability, cause IGBT to damage and cisco unity malfunction.At present for the IGBT of middle low power; the conventional driver module based on M57962 series designs corresponding drive circuit; M57962 series is the standard I GBT driver module that Japanese mitsubishi electric is produced; moderate; but there is the relatively-stationary problem of driving force in this driver module; and the Drive Protecting Circuit of design at present only leans on software cutting-off controlling signal to realize, and can not protect IGBT reliably.For overcoming these shortcomings, needing designed for greater reliability, the drive circuit of driving force can be strengthened to protect IGBT and to drive more powerful IGBT.
Summary of the invention
The problem that the utility model is unreliable for IGBT drive circuit and driving force is inadequate, designs a kind of high reliability middle low power drive unit, to improve reliability and the driving force of drive circuit.
The technical solution of the utility model is: high reliability middle low power drive unit of the present utility model comprises driver module, power-supplying circuit, power supply supervisory circuit, hardware protection and input circuit, fault-signal testing circuit, fault-signal feedback circuit, driver output circuit, amplitude limit and filter circuit, and its driver module is connected with power-supplying circuit, hardware protection and input circuit, fault-signal testing circuit, fault-signal feedback circuit and driver output circuit; Power supply supervisory circuit and power-supplying circuit and hardware protection and input circuit are connected; The output of driver output circuit is connected with amplitude limit and filter circuit, and fault-signal testing circuit is connected with driver output circuit; The output of fault-signal feedback circuit is as the link of the control end with pwm control circuit, and the input of hardware protection and input circuit is as the link of the output with pwm control circuit.
Described driver module adopts M57962AL, and fault-signal feedback circuit comprises the optically coupled circuit be made up of optocoupler U5, and hardware protection and input circuit comprise the series connection of AND circuit U2 and not circuit U3; Amplitude limit and filter circuit comprise voltage-stabiliser tube D2 and the voltage-stabiliser tube D3 of differential concatenation; Driver output circuit comprises the complementary circuit be made up of switch triode Q1 and switch triode Q2.
The advantage of the technical solution of the utility model:
The utility model provides the double protection functions of power supply supervisory circuit and over-current hardware protection, with high reliability, can strengthen the drive circuit of driving force to protect IGBT and to drive more powerful IGBT.
Accompanying drawing explanation
Fig. 1 is logic diagram of circuit of the present utility model.
Fig. 2 is physical circuit schematic diagram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described.
Front end of the present utility model connects pwm control circuit, and it exports and connects power switch pipe IGBT.As shown in Figure 1, high reliability middle low power drive unit described in the utility model comprises driver module 1, power-supplying circuit 2, power supply supervisory circuit 3, hardware protection and input circuit 4, fault-signal testing circuit 5, fault-signal feedback circuit 6, driver output circuit 7, amplitude limit and filter circuit 8, and driver module 1 is connected with power-supplying circuit 2, hardware protection and input circuit 4, fault-signal testing circuit 5, fault-signal feedback circuit 6 and driver output circuit 7; Power supply supervisory circuit 3 and power-supplying circuit 2 and hardware protection and input circuit 4 are connected; The output of driver output circuit 7 is connected with amplitude limit and filter circuit 8, and fault-signal testing circuit 5 is connected with driver output circuit 7; The output of fault-signal feedback circuit 6 is as the link of the control end with pwm control circuit, and the input of hardware protection and input circuit 4 is as the link of the output with pwm control circuit.
Fig. 2 is physical circuit schematic diagram of the present utility model: driver module 1 adopts M57962AL chip; Power-supplying circuit 2 comprises Vee power supply and electric capacity C7 ~ C10; The input circuit that power supply supervisory circuit 3 comprises power supply control chip U1 and is made up of resistance R1, R2, R3 and electric capacity C1, C2, C3; Hardware protection and input circuit 4 comprise the series connection of AND circuit U2 and not circuit U3; Fault-signal testing circuit 5 is composed in series by voltage-stabiliser tube D4 and diode, and Ud is connected to the drain electrode of controlled power switch pipe IGBT; Fault-signal feedback circuit 6 comprises the optically coupled circuit be made up of optocoupler U5 and resistance R6, R7, and F1 is connected to the control end of pwm control circuit; Driver output circuit 7 comprises by the complementary circuit be made up of switch triode Q1 and switch triode Q2; Amplitude limit and filter circuit 8 comprise two voltage-stabiliser tubes D2, D3 of differential concatenation, and Ug is connected to the grid of controlled power switch pipe IGBT.
Power-supplying circuit 2 provides both positive and negative power supply for driver module 1; Power supply supervisory circuit 3 monitors the power supply of pwm control circuit; Hardware protection and input circuit 4 receive the signal of the output signal of pwm control circuit, the monitor signal of power supply supervisory circuit 3 and fault-signal feedback circuit 6, and the input signal of driver module 1 is made and after process be to comprehensive three signals; Fault-signal testing circuit 5 detects IGBT in real time and crosses stream information, and give driver module 1 and process, driver module 1 processes rear signal feeds back to pwm control circuit control end through fault-signal feedback circuit 6, feeds back to hardware protection and input circuit 4 simultaneously; Driver output circuit 7 realizes amplifying and current-limiting function the output signal of driver module 1; Amplitude limit and filter circuit 8 realize the function to output signal amplitude limit and filtering.
Described power-supplying circuit 2 is connected with 4,6 ends of driver module 1, for driver module provides both positive and negative power supply, ensures IGBT fast conducting and shutoff, can reduce turn-on and turn-off loss simultaneously.Power supply supervisory circuit 3 is connected with the control end of pwm control circuit, for monitoring the supply voltage of pwm control circuit, thus ensures the accuracy of pwm control circuit control signal.Hardware protection and input circuit 4 are connected with the output of pwm control circuit; receive the input signal of control signal as driver module 1 of pwm control circuit; wherein hardware protection and input circuit 4 comprehensively carry out control signal, the power supply monitoring signal of power supply supervisory circuit 3, the feedback signal of fault-signal feedback circuit 6 of pwm control circuit, carry out with computing after give driver module 1.
Fault-signal testing circuit 5 exports (i.e. IGBT) whether overcurrent for detecting driver module 1; be connected with 1,2 ends of driver module 1; by the comparison of driver module 1; feed back to the control end of pwm control circuit again through fault-signal feedback circuit 6, feed back to hardware protection and input circuit 4 simultaneously.
Driver output circuit 7 is connected with 5 ends of driver module 1, and driver output circuit 7 comprises power amplification circuit and current-limiting circuit, and wherein power amplification circuit is switch triode Q1 and the switch triode Q2 that work is in complementary state.Current-limiting circuit is made up of current-limiting resistance R8 and R9.Amplitude limit and filter circuit 8 comprise the filter circuit be made up of the voltage-stabiliser tube D2 of differential concatenation and voltage-stabiliser tube D3 amplitude limiter circuit and resistance R10 and electric capacity C11.
During utility model works; input 13, the 14 end inside of driver module 1 (M57962AL) is an optocoupler; when 13 terminations receive the input signal of hardware protection and input circuit 4 and are low; 5 ends of driver module 1 export high level (VDD level); when 13 terminations receive the input signal of hardware protection and input circuit 4 and are high, the 5 end output low levels (VEE level) of driver module 1.
When the voltage that driver module 1 detects 1 end is 7V, driver module 1 judges that IGBT is as short circuit, by 8 ends of driver module 1, fault-signal is outputted to the control end of pwm control circuit immediately by fault-signal feedback circuit 6, the control end of pwm control circuit, pwm control circuit is correspondingly processed.Meanwhile, fault-signal is fed back to hardware protection and input circuit 4 by fault-signal feedback circuit 6, is high, realizes turning off IGBT in time, play the effect of protection IGBT by the input of driver module 1 that oppositely makes of AND circuit U2 and not circuit U3.When the power supply (Vcc) of pwm control circuit is abnormal (as brownout), pwm control circuit inside is out of control, the pwm signal exported is out of control, output signal abnormal, now will the circuit controlled be impacted, power supply supervisory circuit 3 monitors the voltage of pwm control circuit, when voltage is abnormal, power supply supervisory circuit 3 will export low to hardware protection and input circuit 4 immediately, hardware protection and input circuit 4 are high by the input of driver module 1 that oppositely makes of AND circuit U2 and not circuit U3, realize turning off IGBT in time, play the effect of protection IGBT.
Output signal is amplified by the complementary circuit of switch triode Q1, Q2 composition by the power amplification circuit in driver output circuit 7, improves driving force, realizes current limliting by resistance R8 and R9, protection IGBT.Amplitude limiter circuit voltage-stabiliser tube D2 in amplitude limit and filter circuit 8 and the effect of voltage-stabiliser tube D3 guarantee that IGBT reliably turns on and off; The effect of filter circuit resistance R10, electric capacity C11 carries out filtering to output signal, also has protection IGBT not by the effect of electrostatic breakdown simultaneously.
Claims (2)
1. a high reliability middle low power drive unit, comprise driver module (1), power-supplying circuit (2), power supply supervisory circuit (3), hardware protection and input circuit (4), fault-signal testing circuit (5), fault-signal feedback circuit (6), driver output circuit (7), amplitude limit and filter circuit (8), it is characterized in that: driver module (1) and power-supplying circuit (2), hardware protection and input circuit (4), fault-signal testing circuit (5), fault-signal feedback circuit (6) and driver output circuit (7) connect, power supply supervisory circuit (3) and power-supplying circuit (2) and hardware protection and input circuit (4) are connected, the output of driver output circuit (7) is connected with amplitude limit and filter circuit (8), and fault-signal testing circuit (5) is connected with driver output circuit (7), the output of fault-signal feedback circuit (6) is as the link of the control end with pwm control circuit, and the input of hardware protection and input circuit (4) is as the link of the output with pwm control circuit.
2. high reliability middle low power drive unit according to claim 1, it is characterized in that: driver module (1) adopts M57962AL, fault-signal feedback circuit (6) comprises the optically coupled circuit be made up of optocoupler U5, and hardware protection and input circuit (4) comprise the series connection of AND circuit U2 and not circuit U3; Amplitude limit and filter circuit (8) comprise voltage-stabiliser tube D2 and the voltage-stabiliser tube D3 of differential concatenation; Driver output circuit (7) comprises the complementary circuit be made up of switch triode Q1 and switch triode Q2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420363912.0U CN204068673U (en) | 2014-07-01 | 2014-07-01 | A kind of high reliability middle low power drive unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420363912.0U CN204068673U (en) | 2014-07-01 | 2014-07-01 | A kind of high reliability middle low power drive unit |
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| CN204068673U true CN204068673U (en) | 2014-12-31 |
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| CN201420363912.0U Active CN204068673U (en) | 2014-07-01 | 2014-07-01 | A kind of high reliability middle low power drive unit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107834834A (en) * | 2017-11-06 | 2018-03-23 | 湖北三江航天万峰科技发展有限公司 | A kind of power tube drive device with power-down protection |
| CN108233804A (en) * | 2018-01-25 | 2018-06-29 | 江西精骏电控技术有限公司 | A kind of PWM redundancy detections system |
| CN110429802A (en) * | 2019-08-15 | 2019-11-08 | 上海地铁电子科技有限公司 | High-power IGBT drive control plate and control method based on optical fiber technology |
-
2014
- 2014-07-01 CN CN201420363912.0U patent/CN204068673U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107834834A (en) * | 2017-11-06 | 2018-03-23 | 湖北三江航天万峰科技发展有限公司 | A kind of power tube drive device with power-down protection |
| CN108233804A (en) * | 2018-01-25 | 2018-06-29 | 江西精骏电控技术有限公司 | A kind of PWM redundancy detections system |
| CN110429802A (en) * | 2019-08-15 | 2019-11-08 | 上海地铁电子科技有限公司 | High-power IGBT drive control plate and control method based on optical fiber technology |
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