A motor-to-drag durability test system and its safety protection method

Abstract

The invention discloses a motor-to-drag durability test system and a safety protection method thereof, comprising a three-phase AC motor to be tested, a motor controller to be tested, a three-phase AC motor to be tested, a motor controller to be tested, a durability test control terminal, Torque sensor, speed sensor, vibration sensor; the motor controller to be tested is used to control the output torque of the motor to be tested, the motor controller to be tested is used to control the output speed of the motor to be tested, the motor controller to be tested, the motor controller to be tested and the The three nodes of the durability test control terminal are connected to the same communication network; the safety protection method of the motor-to-drag durability test system includes the protection control of the accompanying test terminal, the protection control of the terminal to be tested, and the protection control of the durability test control terminal. In the present invention, three nodes are connected to the same communication network, so that any node can monitor the state information of the other two nodes in real time, thus ensuring that the other two nodes can quickly enter into abnormal protection when any node is abnormal.

Description

technical field [0001] The invention relates to the field of motor testing, in particular to a motor-to-drag durability test system and a safety protection method thereof. Background technique [0002] The durability test of drive motors for new energy vehicles is based on the operating conditions of the motors in actual road conditions, and equivalent strengthening experiments are carried out to accelerate the aging of the motors. Unexpected accidents may occur during the aging process. In order to avoid casualties and economic losses caused by untimely protection when accidents occur, it is particularly important to protect the motor durability test system. [0003] Patent Document 1 (publication number: CN206946305U) discloses a device for testing and aging the output capability of a Dagong motor controller. The solution in this document uses a reactor instead of a motor to test the output capability and aging of the motor controller, which improves the efficiency of dete...

AI Technical Summary

Problems solved by technology

[0005] Most of the motor-to-drag durability systems in the industry use the control terminal to monitor the controller under test and the controller under test, that is, the controller under test and the controller under test do not monitor the state of each other for security protection. This protection method When an accident occurs at one end, the control terminal needs to send the protection command to the other end. The protection is not fast enough, and the system may be out of control due to the communication loss of the control terminal.

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