Commutation failure correction scheme for a controlled current i

Details Commutation failure correction scheme for a controlled current i Commutation failure correction scheme for a controlled current i

1981-12-23

1984-05-15

Smith, Jr., David

Electricity: motive power systems

Induction motor systems

Primary circuit control

318806, 363 57, 363 58, H02M 106, H02P 1324

Patent

active

044490887

ABSTRACT:
A system, for use with a controlled current inverter to prevent malfunction of inverter action resulting from an insufficient capacitor voltage to effect commutation of an inverter bridge controlled rectifier, provides that the capacitor voltage is sensed and, if it is of insufficient value to effect rectifier commutation, the application of gating signals to the next to be rendered conductive controlled rectifier is inhibited. In order to achieve initial inverter operation, the inverter current is also sensed and the inhibit function is rendered ineffective until such time as the current reaches a predetermined value.

REFERENCES:
patent: 3821630 (1974-06-01), Kornrumpf et al.
patent: 4161010 (1979-07-01), Mann et al.
patent: 4183081 (1980-01-01), Cutler et al.
patent: 4251763 (1981-02-01), Walker et al.
patent: 4309731 (1982-01-01), Okado
"Current Source Converter for AC Motor Drives", by K. E. Phillips, IEEE Conference Record of 1971 Sixth Annual Meeting of the IEEE Industry and General Applications Group.

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