POWER SUPPLY SYSTEM AND POWER SUPPLY UNIT THEREOF

摘要

PROBLEM TO BE SOLVED: To prevent fluctuation in voltage to be applied to a load even if the load varies, and prevent the deterioration in the power supply device.

SOLUTION: Power is supplied to a DC apparatus 102 by a plurality of power supply units 10a-10c connected in parallel and operated. The power supply units 10a-10c each includes a power circuit portion 11 capable of adjusting an output voltage; a voltage detection portion 13 for detecting the output voltage of the power supply unit portion 11; an impedance element 12 inserted between the power supply unit portion 11 and DC power feeding lines Wdc; and a communication function portion 14 for communicating with the other power supply units 10a-10c. The power supply units 10a-10c each includes a reference voltage generating portion 15 for setting a mean value of the output voltages of the power supply circuit portions 11 of all the power supply units 10a-10c as a reference voltage; and an optimum setting portion 16 for instructing so that the output voltage of the power supply circuit portion 11 of each of the power supply units 10a-10c may sequentially match the reference voltage.

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