Power supply control device

Patent metadata

Field	Value
Publication number	US-9425610-B2
Application number	US-201314376736-A
Country	US
Kind code	B2
Filing date	Jan 22, 2013
Priority date	Feb 8, 2012
Publication date	Aug 23, 2016
Grant date	Aug 23, 2016

Abstract

A power supply control device includes an inverter having plural switching elements, an inverter controller that controls the inverter, a device power supply that generates a first power supplied to the inverter controller, a detector that detects whether there is an abnormality relating to the compressor, and a power supply controller. The inverter generates drive voltages usable to drive a compressor motor that is a drive source of a compressor as a result of the switching elements switching on or off, and outputs the drive voltages to the compressor motor. The power supply controller stops generation of the first power by the device power supply to thereby stop the control of the inverter controller in a case where there is an abnormality relating to the compressor.

First claim

What is claimed is:

1. A power supply control device comprising:
an inverter having plural switching elements, the inverter being configured
to generate drive voltages usable to drive a compressor motor that is a drive source of a compressor as a result of the switching elements switching on or off, and
to output the drive voltages to the compressor motor;

an inverter controller configured to control the inverter;
a device power supply configured to generate a first power supplied to the inverter controller;
a detector arranged and configured to detect whether there is an abnormality relating to the compressor; and
a power supply controller configured to stop generation of the first power by the device power supply to thereby stop the control of the inverter controller in a case where there is an abnormality relating to the compressor.

2. The power supply control device according to claim 1 , wherein
the device power supply is further configured to generate the first power using outside power supplied from an outside power supply located outside, and
the power supply controller is further configured to stop the generation of the first power by the device power supply by cutting off a supply of the outside power to the device power supply in a case where there is an abnormality relating to the compressor.

3. The power supply control device according to claim 2 , wherein
the power supply controller has a relay disposed on a power supply line interconnecting the outside power supply and the device power supply, and
a current flowing through the power supply line is smaller than a current flowing in the inverter.

4. The power supply control device according to claim 1 , further comprising
an inverter driver arranged and configured to switch each of the switching elements on or off based on an output of the inverter controller,
the device power supply being further configured
to generate a second power that is separate from the first power and is supplied to the inverter driver, and
to stop generating the second power in a case where there is an abnormality relating to the compressor.

5. The power supply control device according to claim 2 , further comprising
an inverter driver arranged and configured to switch each of the switching elements on or off based on an output of the inverter controller,
the device power supply being further configured
to generate a second power that is separate from the first power and is supplied to the inverter driver, and
to stop generating the second power in a case where there is an abnormality relating to the compressor.

6. The power supply control device according to claim 3 , further comprising
an inverter driver arranged and configured to switch each of the switching elements on or off based on an output of the inverter controller,
the device power supply being further configured
to generate a second power that is separate from the first power and is supplied to the inverter driver, and
to stop generating the second power in a case where there is an abnormality relating to the compressor.

Assignees

• Daikin Ind Ltd

Inventors

• Nakashita Yuuko
• Yagi Satoshi

Classifications

• H02H7/0833 Primary

  for electric motors with control arrangements · CPC title

• H02M7/5387

  in a bridge configuration · CPC title

• H02M1/36

  Means for starting or stopping converters · CPC title

• Y10S388/903

  Protective, e.g. voltage or current limit · CPC title

• H02M7/44

  by static converters · CPC title