CN215263833U

CN215263833U - IGBT/SiC device fault on-line automatic monitoring system

Info

Publication number: CN215263833U
Application number: CN202120524657.3U
Authority: CN
Inventors: 孙厚强; 张高瑞; 秦浩楠; 李小伟; 王知学
Original assignee: Qingdao Zhongmiao Invasive Core Electronics Co ltd; Shandong Jiaotong University
Current assignee: Qingdao Zhongmiao Invasive Core Electronics Co ltd; Shandong Jiaotong University
Priority date: 2021-03-12
Filing date: 2021-03-12
Publication date: 2021-12-21
Anticipated expiration: 2031-03-12

Abstract

The utility model discloses an IGBT/SiC device fault on-line automatic monitoring system, which comprises an IGBT/SiC power device, an acquisition module, a driving module, a communication module and a server, the acquisition module acquires corresponding data of the IGBT/SiC power device and transmits the data to the server through the communication module, the collecting module comprises a loop current collecting module, a loop voltage collecting module, a temperature collecting module and a working time collecting module, the processing circuit provides the server with switching frequency data of the IGBT/SiC power device, the utility model provides an on-line automatic monitoring system for the faults of the IGBT/SiC power device, the method can predict the failure probability of the IGBT/SiC power device in real time, effectively reduce the failure occurrence rate of the equipment, ensure the operation safety and reliability of the equipment, reduce the maintenance cost and improve the operation efficiency of the equipment.

Description

IGBT/SiC device fault on-line automatic monitoring system

Technical Field

The utility model relates to an electron device technical field especially relates to an IGBT/SiC device trouble automatic monitoring system on line.

Background

With the increasing development of the fields of new energy automobiles, industrial power supplies and the like, the cost of a power device accounts for about 10% of the system, so that the working stability and safety of the power device such as IGBT/SiC and the like are increasingly concerned by people; how to avoid equipment shutdown or safety accidents caused by the damage of power devices through effective monitoring means is an important research hotspot.

SUMMERY OF THE UTILITY MODEL

The utility model provides an online automatic monitoring system of IGBT/SiC device trouble.

The scheme of the utility model is that:

the utility model provides an IGBT/SiC device trouble on-line automatic monitoring system, includes IGBT/SiC power device, collection module, drive module, communication module, server, collection module gathers corresponding data of IGBT/SiC power device pass through communication module to the server transmission data, collection module includes return circuit current collection module, return circuit voltage collection module, temperature collection module, operating time collection module, the server is to drive module transmission signal, collection module is the sensor, drive module is the driver, and processing circuit does the server provides IGBT/SiC power device's switching frequency data.

The power supply system supplies power to the IGBT/SiC power device, the acquisition module, the driving module, the server and the processing circuit.

As a preferred technical scheme, the communication module is in a CAN communication mode, and the server transmits a signal to the driving module through the communication module.

As a preferable technical scheme, the server comprises an IGBT/SiC power device fault prediction model, and the GBT/SiC power device fault prediction model module is used for predicting the GBT/SiC power device fault.

As a preferred technical scheme, the acquisition module further comprises a speed acquisition module and a heat dissipation power acquisition module.

The loop current acquisition module, the loop voltage acquisition module, the temperature acquisition module, the working time acquisition module, the speed acquisition module and the heat dissipation power acquisition module are respectively a loop current acquisition sensor, a loop voltage acquisition sensor, a temperature acquisition sensor, a working time acquisition sensor, a speed acquisition sensor and a heat dissipation power acquisition sensor.

Due to the adoption of the technical scheme, the on-line automatic monitoring system for the faults of the IGBT/SiC device comprises the IGBT/SiC power device, a collecting module, a driving module, a communication module and a server, wherein the collecting module collects corresponding data of the IGBT/SiC power device and transmits the data to the server through the communication module, the collecting module comprises a loop current collecting module, a loop voltage collecting module, a temperature collecting module and a working time collecting module, the server transmits signals to the driving module, the collecting module is a sensor, the driving module is a driver, and a processing circuit provides switching frequency data of the IGBT/SiC power device for the server.

The utility model discloses an IGBT/SiC device trouble automatic monitoring system on line, but real-time prediction IGBT/SiC power device fault probability effectively reduces equipment trouble incidence, ensures equipment operation security and reliability, reduces the maintenance cost, promotes equipment operating efficiency;

the method can predict the fault probability of a typical application system, and can be widely applied to various different IGBT/SiC power device application working conditions such as new energy vehicles, charging facilities, industrial special power supplies and the like.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

fig. 2 is a schematic diagram of the LSTM neural network model structure of the present invention.

Detailed Description

In order to make up for above not enough, the utility model provides an online automatic monitoring system of IGBT/SiC device trouble is in order to solve the problem in the above-mentioned background art.

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention will be further described with reference to the following embodiments.

Example (b):

in the 20KW electric driving system of the electric automobile, a main control chip adopts a 1200V 200A IGBT/SiC module to form a three-phase full-bridge converter circuit, a three-phase voltage is output to control a motor, a current, voltage, temperature and speed data sampling module is added into an IGBT/SiC module unit to monitor the running state of the main control chip in real time, and simultaneously, the sampled data and time data are utilized to establish,

the input data acquisition is carried out through a current, voltage and temperature sampling module, and the switching frequency is obtained through a CPLD logic processing circuit; transmitting data to background server for model training and prediction through CAN communication

The method is characterized in that a fault prediction model of the IGBT/SiC power device based on the LSTM neural network obtains the health state of the main control chip in the whole life cycle through a big data analysis means, and when certain data is detected to exceed the normal value of the model, the fault state cycle of the main control chip can be predicted through a training model, so that the main control chip can be effectively prevented from gradually entering a failure mode, and the working reliability and stability of the main control chip are improved.

Acquiring current, voltage, switching frequency, temperature, speed, loss and heat dissipation power data of a main loop by sampling a main control chip and a CPLD (complex programmable logic device) logic processing circuit of the main control chip to establish a database, wherein the database data set contains n ten thousand collected data, covers the data of a full life cycle of a power device from production to failure, can be divided into a training set and a testing set, and can be divided into two parts, namely the training set and the testing set, wherein two third of the data set is used as the training set for the fault prediction model training of the IGBT/SiC power device, and one third of the data set is used as the testing set for verifying the accuracy of the fault prediction model of the IGBT/SiC power device; the data sets are updated in real time according to the sampling time and are carried out in the background.

After the training of the IGBT/SiC power device is completed, the module temperature rise and the loss of the IGBT/SiC power device in the future (1-2) seconds can be predicted in real time through sampling data at different time in an actual circuit, and when certain data is detected to exceed the numerical value predicted by a fault prediction model module of the IGBT/SiC power device, the impending fault is determined through the comparison of 3-5 periods of data; the switching frequency output of the IGBT/SiC power device control circuit can be automatically adjusted according to the module state, the driving circuit of the IGBT/SiC power device is adjusted, and the breakdown fault of the power device caused by the fact that the surface temperature and the loss of the power device are sharply increased due to the fact that the IGBT/SiC power device enters a failure mode is avoided.

The IGBT/SiC power device is automatically adjusted in a targeted mode, closed-loop feedback is achieved through the output state of the module, the switching frequency output of the IGBT/SiC control circuit is adjusted in real time according to the current and voltage of the main loop of the module, and the working and closing states of the IGBT/SiC power device are controlled in time.

The basic principles, main features and advantages of the present invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides an IGBT/SiC device trouble on-line automatic monitoring system which characterized in that: including IGBT/SiC power device, collection module, drive module, communication module, server, the collection module is gathered IGBT/SiC power device's corresponding data pass through communication module to the server transmission data, the collection module includes return circuit current collection module, return circuit voltage collection module, temperature collection module, operating time collection module, the server transmits the signal to drive module, collection module is the sensor, drive module is the driver, and processing circuit does the server provides IGBT/SiC power device's switching frequency data.

2. The IGBT/SiC device fault on-line automatic monitoring system of claim 1, characterized in that: the power supply system supplies power to the IGBT/SiC power device, the acquisition module, the driving module, the server and the processing circuit.

3. The IGBT/SiC device fault on-line automatic monitoring system of claim 1, characterized in that: the communication module is in a CAN communication mode, and the server transmits signals to the driving module through the communication module.

4. The IGBT/SiC device fault on-line automatic monitoring system of claim 1, characterized in that: the acquisition module further comprises a speed acquisition module and a heat dissipation power acquisition module.