Intelligent control driver for electric eddy speed damper and its control method

Abstract

The invention discloses an intelligent control drive and the control method for an eddy current retarder. Switching signals includes switch signals which has 7 manual shifts: neutral, 1 block, 2 block, 3 block, 4 block, 5 block, constant rate, ABS switch signals, vehicle speed switch signals and acceleration pedal switch signals; analog signals includes: braking pedal analog signals and rotor temperature analog signals. A microprocessor gathers signals at real time, counts braking moment whose size is needed by the braking and outputs PWM signals of duty rate corresponding to the braking moment, simultaneously, instructs circuits, drive circuits of the microprocessor and brake light drive circuits, and speeds up pedal redundant wrong direction output circuit to send out corresponding control orders; the invention uses a discrete structure, causes a electrically controlled unit and a power module to be separated respectively, and has the advantages of saving space, easy installation and that coils are not easily damaged; rotor disk is not deformed by uniform stress; the life of the eddy current retarder is improved.

Description

technical field [0001] The invention relates to an auxiliary safety device for a vehicle braking system, that is, a control driver for an eddy current retarder. The invention also relates to a control method for a control driver for an eddy current retarder, which is suitable for large passenger cars, buses and trucks. Background technique [0002] At present, the hardware part of the eddy current retarder includes: the stator part has 8 excitation coils, and every 2 excitation coils are connected in series to form a group, and the 8 excitation coils are divided into 4 groups, and the coils in these 4 groups 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 in the middle or both ends of the stator and connected in series with the transmission shaft. [0003] The controller used in the eddy current retarder mainly has two control modes: hierarchical contr...

AI Technical Summary

Problems solved by technology

This hierarchical control method has the following problems: (1) The working probability of each group of excitation coils is different, resulting in uneven heating and aging of each group of excitation coils, which increases the maintenance cost

(2) The force on the rotor disk is uneven, and it is easy to deform after heating, which affects the service life of the retarder

(3) Due to the frequent pull-in of the relay, the contact life is low, and the braking force cannot be adjusted continuously and evenly

(4) The braking torque output by the eddy current retarder shows a step change, which affects the braking stability of the vehicle

This simple control measure leads to unpredictable sudden changes in the braking torque, which reduces the vehicle's braking stability and riding comfort, and may cause traffic accidents in severe cases

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