| 摘要 |
<p>PURPOSE:To compensate the error of a speed data of an electric motor vehicle due to acceleration or deceleration of the vehicle by correcting the speed data with data which represents the acceleration of the vehicle. CONSTITUTION:A speed signal arithmetic circuit 51 inputs a speed pulse SP from a speed detector 3 and calculates a speed frequency signal fp. An accleration signal detector 511 detects an acceleration signal f'p from the speed frequency signal fp, adds the signal f'p and the signal fp and produces a correction speed frequency signal fpc. A slip frequency arithmetic circuit 52 calcultes a slip frequency signal fs with an instruction signal from a controller 6, an armature current signal, the correction speed frequency signal fpc. The signals fpc and the signal fs are added to produce a frequency signal fi of an inverter 2. A voltage signal arithmetic circuit 54 outputs a voltage signal Vi of the inverter 2 which has the prescribed relationship to the signal fi.</p> |
