Motor drive inverter control apparatus

Details Motor drive inverter control apparatus Motor drive inverter control apparatus

2007-06-19

2007-06-19

Masih, Karen (Department: 2837)

Electricity: motive power systems

Induction motor systems

Primary circuit control

C318S701000, C318S376000, C318S717000, C318S817000

Reexamination Certificate

active

10595074

ABSTRACT:
A motor drive inverter control apparatus includes a rectifier circuit for rectifying an AC power supply, an inverter circuit driven by an output from the rectifier circuit, a motor driven by an output from the inverter circuit, a first capacitor coupled in parallel to the output of the rectifier circuit, and a second capacitor coupled in parallel to the first capacitor via a diode. The second capacitor has capacitance not less than three times that of the first capacitor. Although the second capacitor shows a ripple content not less than 90% during practical use, it well absorbs regenerative energy produced by the motor. As a result, elements of the apparatus can be prevented from degrading caused by an over-voltage, and the apparatus can be downsized and reduced its cost.

REFERENCES:
patent: 5449993 (1995-09-01), Davis
patent: 5777861 (1998-07-01), Shimizu et al.
patent: H6/351258 (1994-12-01), None
patent: H11/27953 (1999-01-01), None
patent: 2002/44958 (2002-02-01), None
patent: 2002/51589 (2002-02-01), None
International Search Report of PCT/JP2004/016971.

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