| 摘要 |
<p>PURPOSE:To reliably readhere wheels of an electric railcar by providing a torque control signal to the prescribed value smaller than a reference torque signal when a spinning occurs at the wheels. CONSTITUTION:When wheels spin in place while an electric railcar travels, a spinning signal S having a magnitude in response to the slip outputted from a slip detector 3 is amplified by an amplifier 3 and outputted as an output signal L1. On the other hand, a limiter 5, to which the signal S is inputted, outputs a signal L2 which increases until the signal S is eliminated at the prescribed time constant. Signals L1, L2 outputted when the signal S is generated are substrated by an adder 4 from a reference torque signal Tp, and a suppressing control for decreasing the torque of the motor can be performed by a torque control signal T0 outputted from the adder 4. Thus, the readherence of wheels can be facilitated.</p> |
