Power inverter

Details Power inverter Power inverter

2006-03-21

2006-03-21

Patel, Rajnikant B. (Department: 2838)

Electric power conversion systems

Current conversion

With condition responsive means to control the output...

C363S132000, C363S050000

Reexamination Certificate

active

07016207

ABSTRACT:
In a power converting apparatus including a capacitor connected in series which serves to divide a DC voltage, and a PWM inverter bridge for converting the DC voltage into an AC phase voltage having three electric potentials of a positive voltage, a negative voltage and an intermediate voltage in a plurality of phases, a zero voltage period generator (11) is switched by signal switching devices (5to10) when a load current reaches a first overcurrent level based on the detection of an overcurrent detector (12), and there is provided a zero voltage period having an intermediate voltage in which output phase voltages having all phases of the power converting apparatus become the intermediate voltages, thereby carrying out a current limitation. With an inexpensive structure, consequently, a rapidly increased current in an inverter can be instantaneously suppressed at time of the detection of an overcurrent.

REFERENCES:
patent: 5608595 (1997-03-01), Gourab et al.
patent: 5910892 (1999-06-01), Lyons et al.
patent: 6351397 (2002-02-01), Sawa et al.
patent: 10-164854 (1998-06-01), None
patent: 11-032426 (1999-02-01), None
patent: 2000-102257 (2000-04-01), None
patent: 2001-061283 (2001-03-01), None

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