Real-time igbt overload protection method
An overload protection and switching tube technology, applied in emergency protection circuit devices, automatic disconnection emergency protection devices, instruments, etc., can solve the problems of motor overtemperature, high current design level, inability to achieve effective protection, etc., to achieve overload capacity, cost reduction effect
Active Publication Date: 2022-04-12
BEIJING SWORD ELECTRIC IND
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Problems solved by technology
[0005] In order to solve the above-mentioned problems in the prior art, that is, in order to solve the problems of poor accuracy of over-temperature protection and slow response to rapid overload in the current overload protection of IGBT devices; effective protection cannot be realized when multiple overload conditions occur at the same time , it is prone to the problem of motor overheating or even frying machine; the current design level is high, which increases the cost of IGBT and other problems
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[0028] Preferred embodiments of the present invention are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention, and are not intended to limit the protection scope of the present invention.
[0029] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and embodiments.
[0030] figure 1 An exemplary system architecture to which embodiments of the real-time IGBT overload protection method of the present application can be applied is shown. Such as figure 1 As shown, the system includes a controller, motor driver, motor and sensing device. Among them, the controller is connected with the motor driver and the sensing devi...
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The invention relates to the field of safety control of motor drivers, and proposes a real-time IGBT overload protection method, aiming at solving the problems of poor over-temperature protection accuracy and slow response to rapid overload in the overload protection of IGBT devices. The method includes: acquiring information related to the operation of the IGBT module as the operation information; respectively determining the heat loss of the IGBT switch tube and the heat loss of the diode in the IGBT module according to the above operation information; according to the heat loss of the IGBT switch tube and the diode Calculate the junction temperature and case temperature of the above IGBT module; compare the temperature values represented by the above junction temperature and the above case temperature with the preset junction temperature threshold and case temperature threshold respectively, and the above junction temperature is greater than the above junction temperature. threshold value, or when the above-mentioned case temperature is greater than the above-mentioned case temperature threshold value, it is determined that the above-mentioned IGBT module is overloaded, and the above-mentioned IGBT module is protected from overload. The invention realizes the real-time over-temperature protection and overload protection of the IGBT module.
Description
technical field [0001] The invention relates to the field of safety control of motor drivers, in particular to a real-time IGBT overload protection method. Background technique [0002] IGBT (Insulated Gate Bipolar Transistor, Insulated Gate Bipolar Transistor) is a power tube device that controls strong current with weak current. During the operation of the motor, when the motor drive system is overloaded, the current of the power tube device will rise in a short period of time, causing the motor to lose control, and even causing fire and other personal or equipment hazards. It is necessary to protect the IGBT in time. [0003] At present, the protection methods for IGBT devices in the motor drive system are: Over-temperature protection implementation: the inverter realizes over-temperature protection through the NTC temperature sensor of the IGBT device. NTC is generally integrated on the copper substrate of the IGBT device, reflecting the IGBT The temperature of the devi...
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IPC IPC(8): H02H7/20H02H5/04G01K1/02G01K7/16
CPCH02H7/20H02H5/04G01K7/16G01K1/02
Inventor 丁习兵高建涛
Owner BEIJING SWORD ELECTRIC IND