Motor overheating protection method

Abstract

The invention discloses a motor overheating protection method, which comprises the following steps of: operating a motor according to a specified parameter P given by a client, and detecting the real-time temperature R of the motor during operation; the real-time temperature R is compared with a plurality of set temperatures so that the motor can make a decision of normal operation in the state of an initial current limiting value I0 or operation with the current limiting value reduced or shutdown according to the comparison result, the set temperatures comprise the temperature Rm of an over-temperature protection point, the temperature Rmax of a shutdown protection point and the temperature Rmin of a recovery operation point, Rm is larger than Rmin and smaller than Rmax, and Rm is larger than Rmin and smaller than Rmax. When the real-time temperature R meets the condition that R is larger than Rm and smaller than Rmax, the motor enters an over-temperature protection mode, the motor operates by reducing the current limiting value in the over-temperature protection mode, and the current limiting value I is reduced along with the rise of the real-time temperature R, so that the motor is prevented from directly stopping operating when the motor reaches a protection point, the motor can keep working in the over-temperature protection mode, the motor can be suitable for various use scenes, and the service life of the motor is prolonged. Especially for occasions requiring continuous operation of the motor, the use flexibility of the motor is improved, and the motor can be conveniently used in different occasions.

Description

technical field [0001] The invention relates to a motor overheating protection method. Background technique [0002] The DC motor has the characteristics of low power consumption and low noise, coupled with the increasingly mature control technology, the DC motor control system has good speed regulation performance, so it is more and more widely used in the field of industrial automation and household appliances. [0003] At present, DC motors on the market generally include a motor unit and a motor controller. There are various electronic components inside the motor controller. During the operation of the motor, the electronic components will generate heat, which will cause the temperature of the DC motor to rise. The electronic components of the motor controller are damaged by high temperature, and the over-temperature protection function is usually designed on the DC motor. At present, the commonly used method to detect the temperature is to use the temperature detection ...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a motor overheat protection method, which can solve the technical problems in the prior art that the motor stops running directly when the temperature of the motor reaches the protection point, resulting in poor flexibility of the motor and inconvenient use by users

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