| 摘要 |
PROBLEM TO BE SOLVED: To provide a DC power supply system and DC power supply unit capable of stably generating output voltage in parallel operation.SOLUTION: A DC power supply unit (100) having a constant power drooping characteristic comprises a control section (140) for making the DC power supply unit operate according to the constant power drooping characteristic when output current of the DC power supply unit changes by a predetermined amount. The control section comprises: a voltage detection section (141) for detecting output voltage; a shunt resistor (142) and differential amplifier section (143) which function as a current detection section for detecting output current; a reference voltage generating section (144) for generating a reference value for the output voltage according to the constant power drooping characteristic when the output current changes by the predetermined amount; and a calculation section (145) for calculating a control amount for making the DC power supply unit operate according to the constant power drooping characteristic, from the reference value and the output voltage detected by the voltage detection section. |
