Commutation circuits for thyristor inverters

Details Commutation circuits for thyristor inverters Commutation circuits for thyristor inverters

1981-08-26

1983-09-20

Shoop, William M.

Electric power conversion systems

Current conversion

Using semiconductor-type converter

363136, 363138, H02M 106, H02M 7515

Patent

active

044059779

ABSTRACT:
The commutation circuit for commutating a conducting thyristor includes an inductance, a capacitance and a commutation thyristor all connected in series with the conducting thyristor and the dc source, the commutation thyristor initiates the commutation when triggered. The circuit further includes a first diode connected in reverse polarity across the commutation thyristor and a second diode connected in reverse polarity across the commutation thyristor-capacitance series circuit. The voltage across the capacitance is zero when each commutation cycle is initiated, and also when each commutation cycle ends.

REFERENCES:
patent: 3207974 (1965-09-01), McMurray
patent: 3475674 (1969-10-01), Porterfield et al.
patent: 3781645 (1973-12-01), Grom et al.
patent: 3832573 (1974-08-01), Ver Planck et al.
patent: 4274137 (1981-06-01), Hase
Bhagwat et al., "Some New Aspects in the Design of PWM Inverters", Conference: Industry Applications Society IEEE-IAS Annual Meeting, Cleveland, OH, USA (30 Sep.-4 Oct. 1979), pp. 383-393.
Bhagwat et al., "Generalized Structure of a Multilevel PWM Inverter", IEEE-IAS Conference, Cincinnati, Ohio, USA, Sep. 28 to Oct. 3, 1980, pp. 791-803.

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