Voltage source inverter and variable frequency, constant voltage

Details Voltage source inverter and variable frequency, constant voltage Voltage source inverter and variable frequency, constant voltage

1985-12-11

1987-09-29

Smith, Jr., David

Electricity: motive power systems

Induction motor systems

Braking

318803, 318764, H02P 320

Patent

active

046971319

ABSTRACT:
A constant voltage voltage-source inverter of a motor drive includes in its DC-link the combination of diode means, a GTO device and an auxiliary thyristor, the GTO device and the auxiliary thyristor upon transferring to the regenerating mode being cyclically controlled for conduction concurrently with the thyristor of the AC/DC converter so as to match the (voltage-current) domains converter and input of the inverter. Conduction of the GTO device is interrupted before each cyclical control thereof to allow recovery.
Initiation of GTO and auxiliary thyristor conduction upon mode transfer is retarded to allow settling of the system before firing the thyristors of the AC/DC converter with a different firing angle.

REFERENCES:
patent: 3355654 (1987-11-01), Risberg
patent: 3548275 (1970-12-01), Inagaki et al.
patent: 4156899 (1979-05-01), Matsuda et al.
patent: 4375612 (1983-03-01), Wirth
patent: 4521724 (1985-06-01), Sakamoto et al.

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