Electrical energy saving device for motors

Details Electrical energy saving device for motors Electrical energy saving device for motors

1982-08-31

1985-08-06

Smith, Jr., David

Electricity: motive power systems

Braking

Automatic and/or with time-delay means

318345H, 318729, H02P 516, H02P 540

Patent

active

045338574

ABSTRACT:
An electrical energy saving device for motors comprises in combination a principal circuit system and an associated control circuit system. The principal circuit system includes an input power source, a transducer unit, a load, and a triggering device. The control circuit system includes a signal amplifying unit, a feedback unit, a working-point adjusting and indicating unit, a rectifying and filtering unit, a photoelectric coupling unit, an overload protecting unit, and a delay protecting unit. The control circuit system can automatically detect the load state of the motor and develop a signal through the system to adjust the working-point voltage for enabling the triggering device of the principal circuit system to automatically adjust the firing angle so that the proper magnitude of the input voltage and current are effectively provided to the motor in accordance with its different load states. This operation results in electrical energy being economically consumed and the power factor of the system being effectively controlled.

REFERENCES:
patent: 3539892 (1970-11-01), Lindberg
patent: 3742337 (1973-06-01), Digneffe
patent: 3875485 (1975-04-01), Hornung
patent: 4078393 (1978-03-01), Wills
patent: 4243926 (1981-01-01), Phillips
patent: 4266177 (1981-05-01), Nola
patent: 4384243 (1983-05-01), Muskovac
patent: 4392093 (1983-07-01), Paule et al.

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