Apparatus and method for driving inverter circuit

Details Apparatus and method for driving inverter circuit Apparatus and method for driving inverter circuit

2007-02-22

2008-11-18

Jackson, Stephen W (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

C361S103000, C361S106000

Reexamination Certificate

active

07453679

ABSTRACT:
An inverter apparatus includes an inverter circuit, a temperature sensor, and a control circuit. The inverter circuit is driven by a PWM signal and includes switching elements that are divided in first and second groups. The temperature sensor detects a temperature of at least one of the switching elements of the first group. The control circuit controls a duty cycle of the PWM signal such that a first value of heat generated in the first group is equal to or greater than a second value of heat generated in the second group. The control circuit performs an overheat protection for protecting the inverter circuit from overheating when the detected temperature is equal to or greater than a threshold temperature.

REFERENCES:
patent: 5115388 (1992-05-01), Shigekane
patent: 5923135 (1999-07-01), Takeda
patent: A-2001-169401 (2001-06-01), None

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