Motor temperature protection method and motor control equipment and motor system

Abstract

The invention discloses a motor temperature protection method. Operating temperature of a motor at the present moment is obtained every other preset time, a permission parameter of the motor is obtained according to the operating temperature at the present moment, an operating parameter of the motor is controlled to be smaller than or equal to the permission parameter, therefore operating parameters of the motor can be adjusted at real time, adjustment can be achieved in time when the temperature of the motor is abnormal, the motor is protected from over-temperature, and meanwhile smooth output can be obtained. The invention further provides motor control equipment and a motor system.

Description

technical field [0001] The present application relates to the field of motor control, in particular to a motor temperature protection method, motor control equipment and a motor system. Background technique [0002] At present, the application of new energy hybrid power systems is becoming more and more extensive. As a key component of new energy hybrid power systems, the motor must ensure the safety and reliability of the motor. When the motor is working, part of the electrical energy is converted into mechanical energy output, and part of it is converted into Thermal energy, heat is transmitted to the air or other media through the motor material, if the large amount of heat generated by the continuous operation of the motor accumulates to a certain extent, the motor may be burned. [0003] The existing method to protect the motor temperature from being too high is: if the temperature of the motor reaches the warning threshold, directly reduce the maximum output power of t...

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Problems solved by technology

[0003] The existing method to protect the motor temperature from being too high is: if the temperature of the motor reaches the warning threshold, directly reduce the maximum output power of the motor to half of the maximum design value, and if the temperature of the motor cannot be controlled after reducing the output power , the temperature of the motor rises to the maximum allowable operating temperature of the motor. At this time, it is considered that the motor has a serious heat dissipation problem, and the motor is controlled to be turned off. After the motor is turned off, the hybrid power system will also fail.

[0004] In a hybrid system, the motor may need to output a large power for a short time, and the temperature of the motor will rise accordingly. If the temperature exceeds the warning threshold, the output power of the motor will be directly limited to half, and the fluctuation of the adjustment is too large. Large, so that the hybrid system cannot obtain continuous and smooth power output, and it is easy to cause over-protection to the motor

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