CONTROLLER FOR ELECTRIC VEHICLE

摘要

PURPOSE:To improve availability of adhesive force, by detecting the absolute speed of a train and producing a reference speed based on the detected absolute speed upon occurrence of idling or slippage on all shafts. CONSTITUTION:Comparators COMgamma1-COMgamma4 produce idling/slippage detection signals Slgamma1-Slgamma4 when jerk signals gamma1-gamma4 obtained through time differentiation of acceleration signals alpha1-alpha4 obtained based on shaft speed signals V1-V4 exceed over a reference value gamma0. The shaft speeds V1-V4 are fed to a maximum speed generator MAX and a minimum speed generator MIN. On the other hand, an acceleration signal alphaz of body fed from an acceleration sensor (dalpha) is integrated to produce a maximum absolute speed Vzmax and a minimum absolute speed Vzmin. A reference speed generator GVS provides the maximum or minimum shaft speed to a controller TC when idling or slippage does not occur on all the shafts, while provides the maximum or minimum absolute value to the torque controller TC when idling or slippage occurs on all the shafts.