CN211127564U

CN211127564U - Driving and protecting circuit of intelligent power module

Info

Publication number: CN211127564U
Application number: CN201922493623.8U
Authority: CN
Inventors: 卢艳; 窦志源; 张捷; 苏璐梅
Original assignee: Xi'an Weitong Electronic Technology Co ltd
Current assignee: Xi'an Weitong Electronic Technology Co ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-07-28
Anticipated expiration: 2029-12-31

Abstract

The utility model discloses a drive and protection circuit of intelligence power module belongs to the IPM field, including control chip and IPM module, control chip passes through the optoelectronic isolator and connects the IPM module, and each output of IPM module is connected with a TVS diode respectively, and the trouble output pin of IPM module is through opto-coupler connection control chip, and control chip connects display screen and host computer, gives display screen and host computer with trouble signal transmission. The utility model discloses an IPM module sets up transient overvoltage protection device, reduces device switching loss, protection device safe operation.

Description

Driving and protecting circuit of intelligent power module

Technical Field

The utility model relates to a IPM technical field especially indicates a drive and protection circuit of intelligent power module.

Background

In order to make electric devices exert the maximum efficacy and save energy and use electricity, the frequency conversion technology is widely adopted in household appliances such as air conditioners, washing machines, refrigerators, microwave ovens, induction cookers and the like. With the development of the IPM intelligent power module, the IPM integrates three technologies of an IGBT chip, a control IC, and a package, and uses the control IC as a core to provide a driving and perfect protection function. IPM is an advanced power switching device, combining the advantages of GTR (large power transistor) such as high current, low saturation voltage and high withstand voltage, and the advantages of MOSFET (field effect transistor) such as high input impedance, high switching frequency and low driving power, and has become one of the key components for power conversion in the frequency conversion technology.

The IPM is internally integrated with a control voltage undervoltage protection circuit, an over-temperature protection circuit, an over-current protection circuit and a short-circuit protection circuit, and when a fault occurs, a fault signal is output by a fault signal output end. However, in actual use, an auxiliary peripheral protection circuit is required to reliably protect the IPM module, thereby improving reliability.

The di/dt, dv/dt and instantaneous power consumption generated by the superposition of IPM in the high-frequency switching process, parasitic inductance of a power loop and the like give larger impact to the device, and the device is easy to damage. Therefore, an transient overvoltage protection device needs to be arranged for the IPM module, so that the switching loss of the device is reduced, and the safe operation of the device is protected.

SUMMERY OF THE UTILITY MODEL

The utility model provides a drive and protection circuit of intelligent power module sets up transient overvoltage protection device for the IPM module, reduces device switching loss, protection device safe operation.

The technical scheme of the utility model is realized like this:

a driving and protecting circuit of an intelligent power module comprises a control chip and an IPM module, wherein the control chip is connected with the IPM module through a photoelectric isolator, each output end of the IPM module is connected with a TVS diode, a fault output pin of the IPM module is connected with the control chip through an optical coupler, and the control chip is connected with a display screen and an upper computer and sends a fault signal to the display screen and the upper computer.

As a preferred embodiment of the present invention, the UVW output end of the IPM module is connected to a TVS diode respectively.

As a preferred embodiment of the present invention, a latch circuit is further disposed between the fault output pin of the IPM module and the control chip.

As a preferred embodiment of the utility model, control chip passes through the RS485 interface and gives fault information transmission for the host computer.

As a preferred embodiment of the present invention, the IPM module includes a driving chip, a first driver, a second driver, a third driver, a fourth driver, a fifth driver, a sixth driver, a first upper bridge arm switch tube, a second upper bridge arm switch tube, a third upper bridge arm switch tube, a first lower bridge arm switch tube, a second lower bridge arm switch tube and a third lower bridge arm switch tube, the driving chip is connected to the first driver, the second driver, the third driver, the fourth driver, the fifth driver and the sixth driver respectively, the first driver, the second driver, the third driver, the fourth driver, the fifth driver and the sixth driver respectively correspond to the first upper bridge arm switch tube, the second upper bridge arm switch tube, the third upper bridge arm switch tube, the first lower bridge arm switch tube, the second lower bridge arm switch tube and the third lower bridge arm switch tube, a frequency detection circuit is arranged between the driver and the switch tube.

As a preferred embodiment of the present invention, the frequency detection circuit is an exclusive or gate logic circuit.

As a preferred embodiment of the present invention, the frequency detection circuit is an exclusive nor gate logic circuit.

The beneficial effects of the utility model reside in that: and the IPM module is provided with a transient overvoltage protection device, so that the switching loss of the device is reduced, and the safe operation of the device is protected.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a schematic circuit diagram of an embodiment of the driving and protecting circuit of the intelligent power module.

In the figure, 1-control chip; 2-IPM module; 3-a photovoltaic isolator; 4-optical coupling; 5-a display screen; 6-an upper computer.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1, the utility model provides a drive and protection circuit of intelligence power module, including control chip 1 and IPM module 2, control chip 1 connects IPM module 2 through optoelectronic isolator 3, sends the PWM signal to IPM module 2, and each output of IPM module 2 is connected with a TVS diode respectively, and IPM module 2's trouble output pin is through opto-coupler 4 connection control chip 1, and control chip 1 connects display screen 5 and host computer 6, sends trouble signal for display screen 5 and host computer 6. The display screen 5 may be configured to display fault information of the IPM module 2, and the upper computer 6 may collectively obtain fault information of a plurality of IPM modules 2. TVS diodes have extremely fast response times and relatively high surge absorption capabilities. When the two ends of the TVS are subjected to instantaneous high-energy impact, the TVS can change the impedance value between the two ends from high impedance to low impedance at a very high speed to absorb an instantaneous large current and clamp the voltage between the two ends to a predetermined value, thereby protecting the IPM module 2 from instantaneous high power consumption.

The UVW output ends of the IPM module 2 are respectively connected with a TVS diode. In particular, the output end of the switching tube is referred to.

A latch circuit is also arranged between the fault output pin of the IPM module 2 and the control chip 1. The latch circuit can be used for latching the fault information of the IPM module 2, and the fault output information of the IPM module 2 is isolated by the optical coupler 4 and then sent to the latch circuit and the control chip 1.

And the control chip 1 transmits the fault information to the upper computer 6 through an RS485 interface. The control chip 1 is an MCU or a DSP, and transmits the fault information to the upper computer 6 through an RS485 interface.

The IPM module 2 comprises a driving chip, a first driver, a second driver, a third driver, a fourth driver, a fifth driver, a sixth driver, a first upper bridge arm switch tube, a second upper bridge arm switch tube, a third upper bridge arm switch tube, a first lower bridge arm switch tube, a second lower bridge arm switch tube and a third lower bridge arm switch tube, the driving chip is respectively connected with a first driver, a second driver, a third driver, a fourth driver, a fifth driver and a sixth driver, the first driver, the second driver, the third driver, the fourth driver, the fifth driver and the sixth driver respectively correspond to the first upper bridge arm switching tube, the second upper bridge arm switching tube, the third upper bridge arm switching tube, the first lower bridge arm switching tube, the second lower bridge arm switching tube and the third lower bridge arm switching tube, and a frequency detection circuit is arranged between the drivers and the switching tubes. Specifically, the frequency detection circuit is an exclusive or gate logic circuit. The frequency detection circuit is an exclusive-nor logic circuit. Two input pins of the frequency detection circuit are respectively connected with the voltage information of the input end and the output end of the switching tube, whether the frequency is the same or not is roughly judged by judging whether the voltages of the input end and the output end are the same or not, if the frequency is the same, the voltage value change of the input end and the output end is synchronous, and the output pin of the frequency detection circuit is connected with the driving chip.

The utility model discloses a IPM module 2 sets up transient overvoltage protection device, reduces device switching loss, protection device safe operation.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A drive and protection circuit of intelligent power module, includes control chip and IPM module, its characterized in that: the intelligent power supply system comprises an IPM module, a control chip, a light coupling, a display screen, an upper computer and a TVS diode, wherein the IPM module is connected with the control chip through a photoelectric isolator, each output end of the IPM module is connected with one TVS diode, a fault output pin of the IPM module is connected with the control chip through the light coupling, and the control chip is connected with the display screen and the upper computer and sends fault signals to the display screen and the upper computer.

2. The driving and protecting circuit of intelligent power module according to claim 1, wherein: and the UVW output end of the IPM module is respectively connected with a TVS diode.

3. The driving and protecting circuit of intelligent power module according to claim 2, wherein: and a latch circuit is also arranged between the fault output pin of the IPM module and the control chip.

4. The driving and protecting circuit of intelligent power module according to claim 1, wherein: and the control chip transmits the fault information to the upper computer through an RS485 interface.

5. The driving and protecting circuit of intelligent power module according to claim 1, wherein: the IPM module comprises a driving chip, a first driver, a second driver, a third driver, a fourth driver, a fifth driver, a sixth driver, a first upper bridge arm switch tube, a second upper bridge arm switch tube, a third upper bridge arm switch tube, a first lower bridge arm switch tube, a second lower bridge arm switch tube and a third lower bridge arm switch tube, the driving chip is respectively connected with a first driver, a second driver, a third driver, a fourth driver, a fifth driver and a sixth driver, the first driver, the second driver, the third driver, the fourth driver, the fifth driver and the sixth driver respectively correspond to the first upper bridge arm switching tube, the second upper bridge arm switching tube, the third upper bridge arm switching tube, the first lower bridge arm switching tube, the second lower bridge arm switching tube and the third lower bridge arm switching tube, and a frequency detection circuit is arranged between the drivers and the switching tubes.

6. The driving and protecting circuit of intelligent power module according to claim 5, wherein: the frequency detection circuit is an exclusive-OR gate logic circuit.

7. The driving and protecting circuit of intelligent power module according to claim 5, wherein: the frequency detection circuit is an exclusive-nor logic circuit.