Inverter system of automotive motor
First Claim
1. An inverter system equipped with an inverter, said inverter comprising:
- an upper ECU operating under electric supply of a low-voltage battery;
a communication microcomputer receiving an instruction from said upper ECU;
a motor control microcomputer receiving an instruction from said communication microcomputer;
a gate driving circuit controlled by said motor control microcomputer; and
a switching element driven by said gate driving circuit for converting a direct current of a high-voltage battery into an alternating current to drive a motor, wherein said upper ECU and said communication microcomputer are connected to each other via high-speed communication means to transmit instructions, said communication microcomputer and said motor control microcomputer are connected to each other via low-speed communication means to transmit instructions, an insulation boundary is defined between said communication microcomputer and said motor control microcomputer to isolate a low-voltage side electric component receiving electric power of said low-voltage battery from a high-voltage side electric component receiving electric power of said high-voltage battery, and insulation signal transmitting means is disposed on said insulation boundary to assure insulation and transmit signals.
1 Assignment
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Accused Products
Abstract
An inverter includes an upper ECU, a communication microcomputer receiving an instruction from the upper ECU, a motor control microcomputer receiving an instruction from the communication microcomputer, a gate driving circuit controlled by the motor control microcomputer, and a switching element driven by the gate driving circuit for converting a direct current of a high-voltage battery into an alternating current to drive a motor. The communications between the upper ECU and the communication microcomputer is performed according to a CAN protocol. The communications between the communication microcomputer and the motor control microcomputer is performed according to a low-speed serial communication protocol. An insulation boundary is defined between the communication microcomputer and the motor control microcomputer to isolate a low-voltage side electric component receiving electric power of the low-voltage battery from a high-voltage side electric component receiving electric power of the high-voltage battery. And, a photo coupler is disposed on the insulation boundary to assure insulation and transmit signals.
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Citations
4 Claims
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1. An inverter system equipped with an inverter,
said inverter comprising: -
an upper ECU operating under electric supply of a low-voltage battery;
a communication microcomputer receiving an instruction from said upper ECU;
a motor control microcomputer receiving an instruction from said communication microcomputer;
a gate driving circuit controlled by said motor control microcomputer; and
a switching element driven by said gate driving circuit for converting a direct current of a high-voltage battery into an alternating current to drive a motor, wherein said upper ECU and said communication microcomputer are connected to each other via high-speed communication means to transmit instructions, said communication microcomputer and said motor control microcomputer are connected to each other via low-speed communication means to transmit instructions, an insulation boundary is defined between said communication microcomputer and said motor control microcomputer to isolate a low-voltage side electric component receiving electric power of said low-voltage battery from a high-voltage side electric component receiving electric power of said high-voltage battery, and insulation signal transmitting means is disposed on said insulation boundary to assure insulation and transmit signals. - View Dependent Claims (2, 3, 4)
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Specification