Reconstruction of Current Waveform for Traction Control of Battery Car using Parallel-connected MOSFET's On-Voltage

배터리차 추진제어를 위한 병렬 MOSFET의 도통전압을 이용한 전류파형 검출

In this paper, an algorithm of reconstructing the armature current of the battery car is presented by using MOSFET's on-voltage of the dc chopper and a corresponding circuit is developed with the low-cost analog multiplexer. For driving comfort, the armature current of the motor or the traction force should be properly controlled when the car changes the direction and is accelerated or decelerated and climbs up or down the hill. Therefore, an information of the current is needed for the traction control. The proposed reconstruction algorithm is experimentally verified.