Motor temperature protection device, motor, electric vehicle and control method

Abstract

The invention relates to the field of motors, and provides a motor temperature protection device, a motor, an electric vehicle and a control method. A temperature sensor of the motor temperature protection device detects the temperature of the motor in real time, detected temperature signals are transmitted to a control circuit to be compared, the control circuit controls a driving device to control a driving current of the motor according to a comparison result so that the operating state of the motor can be changed, and meanwhile prompting signals are output to enable a prompting device to do a prompting motion to prompt a user for the current operating state of the motor. When the user receives the prompting motion, the user can reduce speed, drive an electric motorcycle or an electric bicycle close to sides and take other related safety measures, and therefore damage to the motor and safety accidents are prevented. Therefore, the motor temperature protection device and the control method can solve the problems that in the prior art, when the temperature of the motor of the electric motorcycle or the electric bicycle is over-high, damage to the motor is caused, and potential safety hazards occur.

Description

technical field [0001] The invention relates to the field of motors, in particular to a motor temperature protection device, a motor, an electric vehicle and a control method. Background technique [0002] The electric motor is one of the three core components of the electric vehicle, and its basic performance is related to the overall performance of the electric vehicle. The use environment and operating state of the electric motor on the electric vehicle are complex and changeable. When the environment and operating state change, the temperature inside the electric motor will also change accordingly. At this stage, electric motorcycles and electric bicycles mostly use DC brushless permanent magnet motors. If the motors run for a long time in a state of high temperature, it is easy to cause demagnetization of the permanent magnets of the motors and damage to the winding insulation materials, which will lead to performance degradation or even failure of the motors. Affect t...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a motor temperature protection device and control method and an electric vehicle, aiming to solve the problem of motor damage and potential safety hazards in the prior art when the motors of electric motorcycles and electric bicycles are running at too high a temperature question

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