Laser diode triggered soft start controller for a polyphase...

Details Laser diode triggered soft start controller for a polyphase... Laser diode triggered soft start controller for a polyphase...

2007-10-16

2007-10-16

Leykin, Rita (Department: 2837)

Electricity: motive power systems

Induction motor systems

Primary circuit control

C318S805000, C318S812000, C318S767000, C318S494000

Reexamination Certificate

active

11355259

ABSTRACT:
A solid state soft start controller system has a power supply, an electric motor, a thyristor electrically interconnected between the power supply and the electric motor so as to selectively allow current to pass from the power supply to the phases of the electric motor, a laser diode optically connected to the thyristor, and a controller connected to the laser diode for triggering the laser diode. Separate thyristors are connected to each phase of the polyphase electric motor. Separate laser diodes and associated light pipes connect the laser diode to the separate thyristors.

REFERENCES:
patent: 3573580 (1971-04-01), Shinozaki
patent: 3742370 (1973-06-01), Hansen
patent: 4361793 (1982-11-01), Nordell
patent: 4896828 (1990-01-01), Peitz, Jr.
patent: 6781342 (2004-08-01), Tolbert et al.
patent: 6929184 (2005-08-01), Barkan
patent: 7088321 (2006-08-01), Parker

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