Electricity: motive power systems – Induction motor systems – Primary circuit control
Patent
1982-12-08
1984-10-16
Truhe, J. V.
Electricity: motive power systems
Induction motor systems
Primary circuit control
318813, 318814, H02P 540
Patent
active
044777612
ABSTRACT:
In order to minimize the current consumption of an alternating-current motor of the induction or the synchronous type (or possibly a plurality of such motors connected in parallel) driving a variable load, a sensor coupled to a supply line of the motor detects the occurrence of a significant change in its operating current and determines the sense of that change. A controller responsive to signals from the sensor then reduces the supply voltage by an incremental or decremental step and, if the sensor detects a resulting decrease in amperage, continues with one or more similar steps until the current levels off. If the initial voltage modification causes the current to rise, the controller progressively changes the supply voltage in the opposite sense until the amperage reaches a minimum. In the case of an induction motor whose rotor speed is controllable by variations in slip frequency with the aid of an arithmetic unit responsive to a tachometric signal and to voltage feedback from the input of its stator, the desired current reduction is achieved by an incrementation or decrementation of the feedback voltage.
REFERENCES:
patent: 4052648 (1977-10-01), Nola
patent: 4055795 (1977-10-01), Mathien
patent: 4160940 (1979-07-01), Wolf
patent: 4186334 (1980-01-01), Hivata
patent: 4344025 (1982-08-01), Okuyama et al.
patent: 4361792 (1982-11-01), Davis
Evans Arthur G.
Ross Karl F.
Truhe J. V.
Zinser Textilmaschinen GmbH
LandOfFree
Method of and system for minimizing current consumption of one o does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of and system for minimizing current consumption of one o, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of and system for minimizing current consumption of one o will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1947184