Heat dissipation control method for oil-cooled motor

Abstract

The invention discloses a heat dissipation control method for an oil-cooled motor. The method employs a housing, a stator, a rotor, and a cooling oil path. The method particularly comprises the following steps of A, checking whether the motor current exceeds an upper limit or not, and stopping power output if the motor current exceeds the upper limit, B, checking whether the temperature of the winding sensor exceeds the overtemperature or not, C, if the temperature is overhigh, limiting motor power output or stopping, and increasing the rotating speed of an oil pump, D, if the motor is not overheated, checking whether the rotating speed of the motor exceeds a critical rotating speed, E, if the motor exceeds the electromagnetic noise rotating speed, reducing the rotating speed, and F, if the critical rotating speed is not exceeded, returning to the step A. According to the heat dissipation control method for the oil-cooled motor, the problems of motor burnout and motor electromagnetic noise caused by motor stalling are prevented. What is ensured is that motor temperature operation is within a reasonable temperature range, and obvious electromagnetic noise is not generated.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a heat dissipation control method for an oil-cooled motor. Background technique [0002] The windings and magnets of existing oil-cooled motors generate a large amount of heat during operation. In order to protect the windings of the motor from overheating, it is necessary to cool the motor with oil. The cooling oil circuit enters the motor from the hollow shaft of the motor, and then cools the motor windings and magnets through the oil injection and oil rejection pipelines. At present, the motor heat dissipation control is to ensure that the motor windings do not overheat by monitoring the winding temperature and the inlet oil temperature; [0003] However, there are two problems as follows: first, the motor heat dissipation control strategy does not take into account the motor stall, when the motor stalls, the motor current increases rapidly, the motor heats up rapidly, and ther...

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Problems solved by technology

[0003] However, there are two problems as follows: first, the motor heat dissipation control strategy does not take into account the motor stall, when the motor stalls, the motor current increases rapidly, the motor heats up rapidly, and there is a risk of overheating of the motor winding; second, The heat dissipation strategy of the motor does not consider the problem of electromagnetic noise caused by excessive motor speed. Therefore, we propose a heat dissipation control method for oil-cooled motors.

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