Electronic speed control circuits

Details Electronic speed control circuits Electronic speed control circuits

1983-10-17

1984-12-18

Goldberg, E. A.

Electricity: motive power systems

Induction motor systems

318767, 318772, H02P 534

Patent

active

044892632

ABSTRACT:
Circuit arrangements to improve the performance of motor speed control circuits using electronic switching on an AC waveform where it is desired to remotely control the electronic switch without either load current or the load waveforms being present at the controlling element. The voltage across the switching device, during the time it is off, is rectified, and used as the charging voltage for the phase firing circuit, with a resistor capacitor timing network determining the firing of the switching device when the capacitor voltage reaches a predetermined value.

REFERENCES:
patent: 3757184 (1973-09-01), Chute
patent: 4323835 (1982-04-01), Lee

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