Motor overheating fault detection method and device, computer equipment and storage medium

Abstract

The invention relates to a motor overheating fault detection method and device, computer equipment, a storage medium and a computer program product. The method comprises the following steps: continuously obtaining power supply voltage data and motor input current data corresponding to a motor; according to the power supply voltage data and the motor input current data, multiple groups of power supply voltage relational expressions are constructed, and the power supply voltage relational expressions are used for representing the relation between the internal resistance value of each winding in the motor and the power supply voltage; obtaining the internal resistance value of each winding at the current moment according to the multiple groups of power supply voltage relational expressions; obtaining the total heating power of the motor at the current moment according to the internal resistance value; and obtaining an overheating fault detection result of the motor according to the total heating power. By adopting the method, the accurate total heating power of the motor can be obtained, so that an accurate motor overheating fault detection result is obtained.

Description

technical field [0001] The present application relates to the field of fault detection, and in particular, to a method and device for motor overheat fault detection, computer equipment, storage media and computer program products. Background technique [0002] A motor is a device that converts electrical energy into mechanical energy. It uses the energized coil (that is, the stator winding) to generate a rotating magnetic field and acts on the rotor (such as a squirrel-cage closed aluminum frame) to form a magneto-electric rotational torque. Motors are divided into DC motors and AC motors according to different power sources. Most of the motors in the power system are AC motors, which can be synchronous motors or asynchronous motors (the stator magnetic field speed of the motor and the rotor rotation speed do not maintain a synchronous speed). The motor is mainly composed of a stator and a rotor, and the direction of the energized wire in the magnetic field is related to th...

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Problems solved by technology

[0004] In the prior art, the heating power of the coil is calculated by collecting the input current of the motor and combining the internal resistance of the coil of the motor. When the heating power is greater than the preset threshold, the controller detects that the motor has an overheating fault. The resistance value of the coil is fixed, and it is impossible to detect the internal resistance of the winding caused by the change of the winding temperature and the heating fault of the motor after the heating power is increased, and the accurate detection result of the motor overheating fault cannot be obtained.

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