Electricity: motive power systems – Induction motor systems – Primary circuit control
Patent
1980-07-03
1981-10-27
Truhe, J. V.
Electricity: motive power systems
Induction motor systems
Primary circuit control
318778, 318812, H02P 736, H02P 126
Patent
active
042976286
ABSTRACT:
A standard, unmodified AC induction motor has its stator winding energized from a sine wave source through a signal-responsive wave modifier operative to control the portion of each cycle of the sine wave which is coupled from said source to the stator winding. A motor current demodulator, responsive to efficiency-related parameters of the inrush current to the stator winding each time the current in the stator winding increases from zero, produces a control signal for the wave modifier, which signal varies with a decrease in motor operating efficiency below the maximum inherent efficiency of the motor to increase the field density of the stator winding in response to increases in motor load and to decrease said stator field density in response to decreases in said load and/or to maintain the most energy-efficient stator field density at rated motor loads when the voltage magnitude of the sine wave source increases or decreases from its nominally rated magnitude.
REFERENCES:
patent: 3443188 (1969-05-01), Mortimer
patent: 3619750 (1971-11-01), Mokrytzki
patent: 3813589 (1974-05-01), Boice
patent: 4041361 (1977-08-01), Cornell
patent: 4172991 (1979-10-01), Akamatsu et al.
patent: 4176307 (1979-11-01), Parker
patent: 4190793 (1980-02-01), Parker et al.
patent: 4215305 (1980-07-01), D'Atre et al.
Moose Richard M.
Parker Louis W.
Truhe J. V.
LandOfFree
Energy economizer for induction motors does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Energy economizer for induction motors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Energy economizer for induction motors will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-281660