| 摘要 |
PURPOSE:To reduce the variance of a load current by allowing each power source to have a negative output resistance characteristic when plural power sources are operated simultaneously and allowing power sources which are not stopped to have non-negative high or low output resistance characteristics when a part of power sources is stopped. CONSTITUTION:Currents IA and IB transmitted from current sources 10A and 10B are shunt to a current IR flowed to a resistance R and a load current IL. A current detecting circuit 16 detects the current IR. When an output voltage VA is lower than a preliminarily determined voltage, the resistance R becomes a negative resistance to obtain a desired load sharing characteristic; and when the voltage VA exceeds a set voltage, the resistance R becomes a positive resistance to reduce the variance of the load current for operation of one current source. Currents iA and iB transmitted from voltage sources 20A and 20B are flowed to a load through a control circuit 7, and a current detecting circuit 17 detects the current iA. When the output current iA is lower than a preliminarily determined current, the resistance R becomes a negative resistance to obtain a desired load sharing characteristic; and when the current iA exceeds a set current, the resistance R becomes a positive resistance to reduce the variance of the load current for operation of one voltage source. |
