Eddy current retarder controller and control method

Abstract

The invention discloses an eddy current retarder controller. The controller comprises a single chip microcomputer, a signal input module, an indicating lamp, a CAN communication interface, a drive circuit and a current sampling circuit, wherein the signal input module, the indicating lamp, the CAN communication interface, the drive circuit and the current sampling circuit are connected to the single chip microcomputer, the IGBT module of the drive circuit is connected to the single chip microcomputer through a gate circuit U3, the current sampling circuit comprises a sampling resistor R3, a retarder coil group L, an over-current protection circuit U4, a sampling signal conditioning circuit U5 and the like. The eddy current retarder controller is simple in structure, reliable in performance, judges the vehicle load situation, brake demand amount and the like of a vehicle at present by acquiring engine rotation speed, throttle opening degree, vehicle speed, temperature and other information, automatically adjusts output duty ratio of the IGBT module, reduces current of a retarder coil, accordingly automatically decreases output braking force, achieves automatic load adjustment control and ensures running safety.

Description

technical field [0001] The invention relates to the technical field of automobile control, in particular to an eddy current retarder controller. Background technique [0002] At present, the eddy current retarder is generally used in the braking of large vehicles to improve the braking force of the vehicle during driving. The eddy current retarder system is divided into two parts, the control circuit and the actuator. The actuator is a set of excitation The mechanical assembly composed of the coil and the corresponding mechanical structure, the control circuit generates a corresponding braking force on the rotating shaft (transmission shaft) of the actuator by passing current to the excitation coil of the actuator, and brakes the vehicle. Traditional eddy current retarder controllers generally adopt step-by-step control methods, such as figure 1 As shown, according to the change of the control switch (hand brake or foot brake signal), the multiple groups of excitation coils...

AI Technical Summary

Problems solved by technology

The program calculates the real-time braking force of the car after inputting relevant signals, and then applies the braking force to the braking system. Traffic conditions (mountain road, high speed, rain, snow), car load status (no load, heavy load) and other factors are related, because the braking force required by the car during acceleration or braking on flat roads, climbing, and downhill Each is different, the actual application effect of this scheme will be affected by the deviation of the parameter calculation, and the output braking effect will be significantly affected

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