Control system for a voltage-type inverter

Details Control system for a voltage-type inverter Control system for a voltage-type inverter

1984-10-05

1986-06-24

Leung, Philip H.

Electric power conversion systems

Current conversion

With means to introduce or eliminate frequency components

363 98, H02M 7537

Patent

active

045970378

ABSTRACT:
In a control system for a voltage-type inverter which comprises a bridge connection of electric valves each comprising a reverse parallel connection of a semiconductor switching element and a diode, and converts a DC power to an AC power by means of PWM control, a voltage detection device is provided to detect an output voltage of the inverter. A voltage correction circuits corrects the pulse width of the pulse width modulation signal in accordance with the comparison of the detected voltage and the PWM signal. A drive circuit, which provides a dead time during which the switching elements of the electric valves connected in series with each other are concurrently non-conductive, uses the corrected PWM signal for driving the switching element.

REFERENCES:
patent: 3919620 (1975-11-01), McMurray et al.
patent: 4063143 (1977-12-01), Forstbauer
patent: 4348734 (1982-09-01), Dougherty
patent: 4445167 (1984-04-01), Okado
patent: 4502106 (1985-02-01), Glennon
patent: 4546422 (1985-10-01), Okado
1983 Journal Article of Akamatsu et al, "Ultrasonic-Frequency-PWM Inverter Using Capable Bipolar Transistor and a New PWM Control Method".

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