INVERTER SYSTEM FOR VEHICLE-MOUNTED AIR CONDITIONER
First Claim
1. An inverter system for a vehicle-mounted air conditioner that controls an operation of a motor for driving a compressor that constitutes a vehicle-mounted air conditioner, comprising:
- a switching element for rotationally driving said motor;
a gate circuit for driving a gate of said switching element;
a control circuit that controls said gate circuit; and
a communication interface that communicates with a host control circuit that issues a command to said control circuit from outside said inverter system,wherein said switching element and said gate circuit are isolated from said control circuit, and isolated signal transmission means for transmitting signals while ensuring electrical isolation is provided between said control circuit and said gate circuit.
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Accused Products
Abstract
The present invention has an object to provide an inverter system for a vehicle-mounted air conditioner that prevents noise from entering a control circuit and allows high speed communication. A motor control microcomputer 24 is isolated from a gate circuit 22, and communication therebetween is performed via a photocoupler 80. This suppresses the influence of noise resulting from changes caused by changes in voltage and current that occur in a high voltage system for driving a motor 30. Also, the motor control microcomputer 24 and a communication driver 27 can be directly bus-connected without a photocoupler, thereby allowing high speed communication therebetween.
10 Citations
7 Claims
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1. An inverter system for a vehicle-mounted air conditioner that controls an operation of a motor for driving a compressor that constitutes a vehicle-mounted air conditioner, comprising:
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a switching element for rotationally driving said motor; a gate circuit for driving a gate of said switching element; a control circuit that controls said gate circuit; and a communication interface that communicates with a host control circuit that issues a command to said control circuit from outside said inverter system, wherein said switching element and said gate circuit are isolated from said control circuit, and isolated signal transmission means for transmitting signals while ensuring electrical isolation is provided between said control circuit and said gate circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification