Method and apparatus for detecting shortcircuit in arm of GTO in

Details Method and apparatus for detecting shortcircuit in arm of GTO in Method and apparatus for detecting shortcircuit in arm of GTO in

1980-06-17

1983-05-17

Strecker, Gerard R.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

340650, 361 86, 363 58, G01R 3102, H02H 7122, H02H 328

Patent

active

043842488

ABSTRACT:
Shortcircuit in an arm including a series connection of GTO's and reactors of an inverter is detected by sensing a voltage across the reactor. In one method, the shortcircuit in the arm is detected when voltages are coincidently applied to a P-line arm reactor and an N-line arm reactor for a predetermined time period. In another method, it is detected when an integrated value of a voltage across at least one of the reactors exceeds a predetermined level.

REFERENCES:
patent: 3343038 (1967-09-01), Johnson
patent: 3524200 (1970-08-01), Humpage et al.
patent: 3916287 (1975-10-01), Brenneisen et al.
patent: 4133018 (1979-01-01), Terunuma et al.
patent: 4228477 (1980-10-01), Claus et al.
patent: 4231083 (1980-10-01), Matsuda et al.

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