Counter controlled pulse width modulated inverter

Details Counter controlled pulse width modulated inverter Counter controlled pulse width modulated inverter

1981-01-05

1982-04-13

Pellinen, A. D.

Electric power conversion systems

Current conversion

With means to introduce or eliminate frequency components

363132, H02M 7537

Patent

active

043251129

ABSTRACT:
A voltage source inverter has a main circuit with a switching device to which is connected a DC power source through a load, and a control circuit for controlling the on-off operation of the switching device. The control circuit includes a function generator for outputting a first signal representative of the voltage-time-integration value in correspondence with the phase of the load voltage, a time counter for outputting a second signal representative of total time of the integrated time of the period during which the DC voltage is applied to the load, and a comparator for comparing the first signal with the second signal. The output of the comparator controls the on-off operation of the switching device through a logic circuit and supplies a pulse-width-modulated AC voltage to the load.

REFERENCES:
patent: 3538420 (1970-11-01), Klein
patent: 3958171 (1976-05-01), Sekino
patent: 4099109 (1978-07-01), Abbondanti
patent: 4153930 (1979-05-01), Marceau et al.

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