Synchronous motor protection

Details Synchronous motor protection Synchronous motor protection

1984-09-21

1987-02-03

Smith, Jr., David

Electricity: motive power systems

Synchronous motor systems

Synchronization systems

318709, 318778, 318783, H02P 540

Patent

active

046410740

ABSTRACT:
A digital controller for synchronous motors prevents excessive heating of squirrel cage windings during motor starting. It reduces motor excitation if the actual accrued excitation time exceeds the maximum allowable excitation time of the controlled motor. It provides for adjustment of allowable time responsive to changes in excitation voltage. The thermal characteristic of the controlled motor is automatically derived from merely a few manually entered set point values.

REFERENCES:
patent: 2308304 (1943-01-01), Reagan
patent: 4286303 (1981-08-01), Genheimer et al.
patent: 4288828 (1981-09-01), Kuntner et al.
patent: 4291263 (1981-09-01), Stevenson et al.
patent: 4470092 (1984-09-01), Lombardi
patent: 4510548 (1985-04-01), Boothman
patent: 4542324 (1985-09-01), Leuthen

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