PWM inverter with trapezoidal output

Details PWM inverter with trapezoidal output PWM inverter with trapezoidal output

1986-02-27

1987-12-29

Wong, Peter S.

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

363 97, H02M 3337

Patent

active

047165090

ABSTRACT:
A pulse-width-modulated inverter-converter for generating a direct current output from a direct current supply which utilizes a power inverter having smoothed trapezoidal waveform at the inverter output. A nonlinear inductive element, e.g. a reactor, is provided in series with the center tap of the primary winding of the power transformer which is connected to the power transistors of the inverter to allow storage in a capacitor upstream of this inductor of energy during the recovery times of the transistors.

REFERENCES:
patent: 3303406 (1967-02-01), Bedford
patent: 3921005 (1975-11-01), Watrous
patent: 3938024 (1976-02-01), Clarke
patent: 4176392 (1979-11-01), Cronin et al.
patent: 4287556 (1981-09-01), Borland
patent: 4443840 (1984-04-01), Grissler et al.
patent: 4558230 (1985-12-01), Western
patent: 4559591 (1985-12-01), Grunsch
patent: 4570212 (1986-02-01), Edward et al.
patent: 4599686 (1986-07-01), Muller et al.
patent: 4608499 (1986-08-01), Rathmann

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