ELECTRIC MOTOR CAR CONTROL APPARATUS

摘要

An electric motor car control apparatus has a speed sensorless vector control means (11) that estimates, from the output voltage command and output current of a VVVF inverter (6), a rotational speed of an AC electric motor (7) and controls, based on the estimated value, the VVVF inverter (6). The electric motor car control apparatus further has an overhead-wire current detecting means (4) that detects a current from an overhead wire (1); an irregular-operation detecting means (12) that detects an irregularity of the speed sensorless vector control means (11) from the sign of a current of the overhead wire (1) detected by the overhead-wire current detecting means (4) during the operation of the VVVF inverter (6); and a gate stop means (13) that causes the VVVF inverter to stop when the irregular-operation detecting means (12) detects the irregularity.