A Thermal Protection Method Based on Current Sampling Motor Controller

Abstract

The invention discloses a heat protection method based on a current sampling motor controller. A motor operation current is sampled through a motor controller in real time, in combination with the software algorithm and the strategy, E=k*I2*t, the k is a constant, the I is the motor operation current, the t is the motor operation time, for a motor having a hardware heat protector and a motor having no hardware heat protector, the motor heat protection function is respectively realized, an anti-clamping reversal function is guaranteed to be preferable, and personal life safety is guaranteed. The method is advantaged in that for the motor having the hardware heat protector, the anti-clamping reversal function is guaranteed to be preferable through software heat protection, the motor can be further guaranteed to perform performance, and waste because of increase of cost caused by overlarge type selecting performance of the motor can be avoided; for the motor having no hardware heat protector, the anti-clamping reversal function is guaranteed to be preferable through software heat protection, the motor can be prevented from being burnt, and increase of extra cost of the hardware heat protector can be further avoided.

Description

technical field [0001] The invention relates to the technical field of automobile safety, in particular to a thermal protection method based on a current sampling motor controller. Background technique [0002] During the operation of the motor, there are various losses (iron loss, copper loss, etc.), and these losses are converted into heat energy, which increases the temperature of each part of the motor and eventually exceeds the ambient temperature. If the temperature of the motor is too high, the aging of the insulation material will be accelerated, the insulation performance will be reduced, and the motor may even be burned in severe cases. [0003] Motor thermal protection is a protection measure to prevent the motor from overheating and damage to the motor insulation caused by overload, poor ventilation, high ambient temperature or too frequent starts. A "bottom line" safeguard. [0004] The traditional motor thermal protection scheme uses the direct temperature mo...

AI Technical Summary

Problems solved by technology

[0010] The technical problem to be solved by the present invention is to provide a thermal protection method based on current sampling motor controller for the imperfect thermal protection function of the existing motor controller with anti-pinch function, so as to ensure the anti-pinch function, improve customer experience, protect Safety of life and property of people in the car

Images