Electronic control system for motors and the like

Details Electronic control system for motors and the like Electronic control system for motors and the like

1975-05-21

1977-12-27

Miller, J D

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

361 24, 361 29, 361 31, 361100, 361106, H02H 310

Patent

active

040658040

ABSTRACT:
A controller for a motor or like electrical equipment. A thyristor in series with a power conductor that feeds the equipment and a control circuit for activating the gate terminal of the thyristor in accordance with the operating conditions of the equipment. The control circuit includes a transformer having a secondary winding connected to the gate terminal and means for varying the current flow in the secondary winding according to load demands. A three phase system having a thyristor in each conductor and a transformer secondary winding for each thyristor, which windings are on a common core.

REFERENCES:
patent: B504404 (1976-02-01), Gary et al.
patent: 2896127 (1959-07-01), Seeley
patent: 3329869 (1967-07-01), Obenhaus
patent: 3502944 (1970-03-01), Squiers
patent: 3555356 (1971-01-01), Kaiser
patent: 3824430 (1974-07-01), Hentschel

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