Pulse-width modulation type inverter apparatus

Details Pulse-width modulation type inverter apparatus Pulse-width modulation type inverter apparatus

1990-05-03

1991-12-10

Stephan, Steven L.

Electric power conversion systems

Current conversion

With means to introduce or eliminate frequency components

363 58, 363 98, 318811, H02M 112, H02M 75387

Patent

active

050723545

ABSTRACT:
An improvement of control for prevention of a short circuit between controllable elements used as switching elements in a pulse-width modulation type inverter apparatus which outputs a variable amplitude or variable frequency a.c. voltage. The pulse-width modulation type inverter apparatus is of a type wherein, a selecting means selects an output from a processing means within a period during which the result of detection by a current detector falls within a region of substantially zero level and also selects only a signal corresponding to each switching element which effectively acts on the generation of the output current, out of signals generated by a PWM signal generating means during a period other than the above-described period, thereby to output the same as a drive signal for the switching element.

REFERENCES:
patent: 4621316 (1986-11-01), Uesugi
patent: 4847743 (1989-07-01), Kamiyama
patent: 4878163 (1989-10-01), Yamato et al.

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