Inverter units with duty cycle control based on the...

Electric power conversion systems – Current conversion – With means to introduce or eliminate frequency components

Reexamination Certificate

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C363S132000, C363S098000, C363S017000

Reexamination Certificate

active

11366512

ABSTRACT:
An inverter unit includes a DC power source, an inverter circuit having two or more pairs of switching elements which are connected in parallel to the DC power source, so that a DC voltage of the DC power source is converted into a pulse train-like, pseudo-AC voltage output from the inverter circuit, and a PWM generator connected to the inverter circuit for adjusting the pseudo-AC voltage by pulse width modulation. Further, the inverter unit includes a voltmeter for detecting an actual, output voltage which is output from the inverter circuit, and a duty cycle controller for controlling an output duty cycle, so that the detected, actual, output voltage becomes a target output voltage. In this inverter unit, a desirable, output voltage may be obtained stably and accurately even if a voltage of a power source fluctuates.

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patent: 7190130 (2007-03-01), Wogari et al.
patent: 3084941 (2000-07-01), None

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