Motor protection control system and method

Abstract

The invention discloses a motor protection control system and method. The control system comprises a temperature protector which is arranged in a motor and used for performing temperature protection on the motor; a rotating speed detection board which is arranged in the motor and is provided with a rotating speed detection device and a temperature detection device, wherein the rotating speed detection device is used for detecting the rotating speed of the motor and the temperature detection device is used for detecting the temperature in the motor; and a control device which is arranged outside the motor and used for supplying power to the motor stator through the temperature protector to drive the motor rotor to rotate and regulating the input voltage of the motor in a stepped way according to the temperature in the motor to control the stepped change of the rotating speed of the motor. According to the control system, the temperature detection device is additionally arranged on the rotating speed detection board of the motor so that real-time transmission of the temperature in the motor can be realized, then active protection can be performed on the motor according to the real-time temperature in the motor and suspension or loss of the function of the motor can be avoided.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a motor protection control system and a motor protection control method. Background technique [0002] During the operation of the AC motor, a large amount of heat will be generated, which will increase the temperature inside the motor. When the temperature rises to a certain value, the insulation performance inside the motor will be destroyed, and it may also cause other damage due to excessive temperature, and may even cause a fire. [0003] In order to protect the motor, in related technologies, such as figure 1 As shown, install a temperature protector in the winding. Such as Figure 2a , Figure 2b , Figure 2c As shown, at time t0, the temperature around the temperature protector is higher than the temperature protection threshold, the temperature protector actively cuts off the power supply of the motor, and reduces the input voltage of the motor from V1 to 0, so that ...

AI Technical Summary

Problems solved by technology

[0005] 1. Cause the motor function to be suspended or lost, such as the fan stops and there is no wind output;

[0006] 2. The protection impact is relatively large, which may cause the motor to jump from stop to turn;

[0007] 3. The active protection of the motor by the upper computer cannot be realized

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