Load-commutated inverter and synchronous motor drive embodying t

Details Load-commutated inverter and synchronous motor drive embodying t Load-commutated inverter and synchronous motor drive embodying t

1987-02-06

1987-12-15

Salce, Patrick R.

Electric power conversion systems

Current conversion

Using semiconductor-type converter

363 96, 323210, H02M 7521

Patent

active

047137436

ABSTRACT:
In a load commutated inverter system, the recovery time of the outgoing static switch is extended by applying an auxiliary commutation voltage in series with the associated phase line. This action is triggered in response to the gating signal of the on-coming switch during a time interval initiated before the expiration of the overlap time interval. Its duration extends by a predetermined amount beyond the normal recovery time of the outgoing switch.

REFERENCES:
patent: 4131937 (1978-12-01), Pelly et al.
patent: 4306283 (1981-12-01), Kiwaki et al.
patent: 4517636 (1985-05-01), Uchino et al.
Laithwaite, "Natural Commutation of Current-source Thyristor Inverters, Sep.-Oct. 1980, pp. 897-902.
Rosa, "Utilization and Rating of Machine Commutated Inverter-Synchronous Motor Drive", IEEE vol. IA-15, pp. 155-164.
Le-Huy et al., "A Self-Controlled Synchronous Motor Drive Using Terminal Voltage Sensing", IEEE 1986, pp. 562-569.
Plunkett et al., "System Design Method for a Load-Commutated Inverter-Synchronous Motor Drive", IEEE vol. IA-20, May-Jun. 1984, pp. 589-597.
Steigerwald et al., "Analysis of a Novel Forced-Commutation Starting Scheme for a Load-Commutated Synchronous Motor Drive", IEEE vol. IA-15, Jan.-Feb. 1979, pp. 14-24.

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