Method and apparatus for improved control of auxiliary impulse c

Details Method and apparatus for improved control of auxiliary impulse c Method and apparatus for improved control of auxiliary impulse c

1979-07-20

1981-02-24

Shoop, William M.

Electric power conversion systems

Current conversion

With condition responsive means to control the output...

363136, 363138, H02P 1318

Patent

active

042531403

ABSTRACT:
Performance of an auxiliary impulse commutated inverter is significantly improved by controlling the interval between gating an inverter auxiliary thyristor into conduction for commutation of a then-conductive inverter main thyristor and subsequently gating an incoming inverter main thyristor into conduction as a function of inverter load current. When inverter commutation is commenced, a timing signal generator is actuated, producing a rising amplitude timing signal.A comparator continuously monitors the amplitude difference between the timing signal and a preselected inverter reference firing delay interval signal which varies in accordance with inverter load current. When the amplitude of the timing signal and inverter reference firing delay signal are equal, a bistable trigger resets the timing generator and causes the inverter incoming main thyristor to be gated into conduction, ending the commutation interval.

REFERENCES:
patent: 3207974 (1965-09-01), McMurray
patent: 3805141 (1974-04-01), Pompa, Jr. et al.
patent: 3846694 (1974-11-01), Archer
patent: 3852657 (1974-12-01), Skogsholm et al.
patent: 3919620 (1975-11-01), McMurray et al.

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