Pwm cycloconverter
First Claim
1. A PWM cycloconverter including an AC power source in which phases are connected directly to phases of the output side thereof by means of a bi-directional switch having self-arc-extinguishing capability, wherein an AC power source voltage is PWM-controlled in response to an output voltage command to output variable voltage having variable frequency, the PWM cycloconverter comprising:
- an input current detecting means for detecting one or more input current of the PWM cycloconverter; and
a PWM converter connected to a DC voltage means, wherein an output unit of the PWM converter is connected to a place before an input filter of the PWM cycloconverter to keep down resonance of the input filter on the basis of an input current signal detected by means of the input current detecting means.
1 Assignment
0 Petitions
Accused Products
Abstract
A PWM cycloconverter easily capable of improving an input current waveform and regenerating energy of a snubber into a power source is provided. A PWM cycloconverter includes a PWM converter connected to a DC voltage system. An output unit of the PWM converter is connected to a place before an input filter of the PWM cycloconverter to keep down resonance of the input filter.
-
Citations
3 Claims
-
1. A PWM cycloconverter including an AC power source in which phases are connected directly to phases of the output side thereof by means of a bi-directional switch having self-arc-extinguishing capability, wherein an AC power source voltage is PWM-controlled in response to an output voltage command to output variable voltage having variable frequency, the PWM cycloconverter comprising:
-
an input current detecting means for detecting one or more input current of the PWM cycloconverter; and
a PWM converter connected to a DC voltage means, wherein an output unit of the PWM converter is connected to a place before an input filter of the PWM cycloconverter to keep down resonance of the input filter on the basis of an input current signal detected by means of the input current detecting means. - View Dependent Claims (2, 3)
-
Specification