Control method of eddy current retarder braking moment and driving controller

Abstract

The invention discloses a control method of an eddy current retarder braking moment and a driving controller. The control method is characterized by comprising the following steps that: a microprocessor (1) acquires vehicle speed signals, wheel locking signals sent by an anti-skid brake system (ABS) and rotor temperature signals in real time; and when the temperature of an eddy current retarder rotor does not exceed the set threshold temperature, the microprocessor (1) performs open loop control on the eddy current retarder braking moment according to a pulse width modulation (PWM) control signal, the current gear output duty ratio of which is a fixed value. The eddy current retarder driving controller comprises an eddy current retarder, a driving controller connected with the eddy current retarder, and a vehicle power supply system connected with the eddy current retarder and the driving controller respectively. When the temperature of the eddy current retarder rotor exceeds the set threshold temperature, the microprocessor (1) performs closed loop control on the eddy current retarder braking moment according to the rotor temperature difference and the temperature difference change rate, and controls the temperature of the rotor nearby the set threshold temperature. Therefore, the balance of the temperature and the braking moment of the rotor in a high-temperature state is realized, the sudden acceleration problem of a vehicle because the operation of the retarder is stopped is avoided, and the driving safety is improved.

Description

technical field [0001] The invention relates to a method for controlling the braking torque of an eddy current retarder based on the temperature difference of a rotor and the rate of change of the temperature difference, and a drive controller for the eddy current retarder. It belongs to the technical field of automobile control. Background technique [0002] The body part of the eddy current retarder includes: the stator part has 8 excitation coils, every 2 excitation coils are connected in parallel or in series as a group, and the 8 excitation coils are divided into 4 groups, and these 4 groups of coils are connected in parallel . The stator is fixed on the casing by a bracket, and the casing is fixed on the vehicle frame by bolts. The rotor of the eddy current retarder is connected in series with the transmission shaft. Various eddy current retarder controllers have the same requirements on the body of the eddy current retarder. [0003] The gear control of the brakin...

AI Technical Summary

Problems solved by technology

However, stopping the retarder when the driver is unpredictable will inevitably bring about sudden acceleration of the vehicle, especially for cars driving on long-distance downhill mountain roads, which is very dangerous

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