| 摘要 |
PROBLEM TO BE SOLVED: To achieve a power supply device for a vibration compressor that has a preferential automatic switching function, without going via a configuration of diode OR connection and a DC/DC converter in a current path, when supplying input-side DC power supply of an inverter, driving a vibration compressor, from power supplies of two systems of battery input and AC/DC input.SOLUTION: The power supply device for a vibration compressor is configured, such that a power supply of battery input conduction-controls a current path by first/second MOS-FETs connected in series so that source terminals are connected to each other and gate terminals are driven by a common gate voltage. A power supply of AC/DC input conduction-controls a current path by a third MOS-FET in a control part. The power supply of the battery input is directly supplied to an inverter. When the power supply of the AC/DC input is connected, the third MOS-FET is made conductive so as to supply power to the inverter, preferentially to the power supply of the battery input. Furthermore, the first/second MOS-FETs prevent supply from the power supply of the battery input and charging to the power supply of the battery input. |
