Tsubakimoto Chain Company

Shingo Koyama

Makoto Uehira

Satoshi Takashige

A power control device is provided which can execute self-sustaining operation only when conditions for allowing the self-sustaining operation are satisfied reliably, so as to supply AC power to a power load connected with a power system before the self-sustaining operation. In a case where an instruction to change the power control device into the self-sustaining operation state is accepted, the inverter is connected with the loads by the disconnection relay and the self-sustaining operation is started when voltage to be applied to a wiring portion between the disconnection relay and the earth leakage breaker is not detected, when current flowing between the main breaker and the power system is not detected and when a contact signal indicative of the open/close state of the main breaker indicates an open state. Moreover, the inverter is disconnected from the power system by the disconnection relay and the self-sustaining operation is stopped when the power control device is in the self-sustaining operation state in addition to that current flowing to or from the power system is detected or to that a contact signal indicative of the open/close state of the main breaker indicates a close state.

Power control device

In a power feeding apparatus having pickup coils L and L , a rectifier circuit and output terminals U and V, the relays R and R are connected between the output side terminals of the rectifier circuit and the output terminals U and V. Whereas a protective circuit (switching control circuit) , which is connected to the pickup coils L and L and the relay coils r and r to obtain the electric power from the output side terminals of the rectifier circuit in order to carry out ON/OFF control of the relays R and R corresponding to the voltage at the both ends of the pickup coils L and L , is provide. The power feeding apparatus enables to prevent an overcurrent from flowing through a load, to prevent the circuit elements from being destroyed or burnt out due to an overcurrent generated in the pickup coils or an overvoltage generated in a resonance capacitor, to indicate an occurrence of an abnormality and to control the electric power supply by means of a remote control.

Growing community of inventors

Osaka, Japan

Shingo Koyama