Inverter device using capacitance for controlling waveform slew

Details Inverter device using capacitance for controlling waveform slew Inverter device using capacitance for controlling waveform slew

1995-08-04

1997-07-15

Wong, Peter S.

Electric power conversion systems

Current conversion

Using semiconductor-type converter

363 98, H02M 7537

Patent

active

056488963

ABSTRACT:
A DC voltage polarity switching circuit includes four switches connected in a bridge configuration. Switches in opposing legs are paired with each other and turned on and off in alternate phases to deliver a low frequency alternating signal having a trapezoidal waveform to a co-axial cable load. Circuitry is included to control the slew rate when the output signal transitions from one polarity to the other. Also, turn on of a switch in one phase is delayed during turn off of a switch in the end of the interval of presently conducting switches in one phase.

REFERENCES:
patent: 4158224 (1979-06-01), Kreyer et al.
patent: 4860189 (1989-08-01), Hitchcock
patent: 4876635 (1989-10-01), Park et al.
patent: 5001621 (1991-03-01), Egawa

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