Electricity: motive power systems – Induction motor systems – Primary circuit control
Patent
1985-10-02
1988-02-02
Smith, Jr., David
Electricity: motive power systems
Induction motor systems
Primary circuit control
318798, 318806, 318729, H02P 540
Patent
active
047231041
ABSTRACT:
An energy-saving system for feeding an electric induction motor serving as a load, and which is operated from a 3-phase voltage power line, and in conjunction with feeding conductors for the motor includes a power-delivery sub-system operating in a magnetically linear region and coupled to the 3-phase voltage power line for providing variable feeding voltages to the induction motor, a sensing device coupled to the induction motor for generating a signal indicative of the derivatives of active power consumed by the induction motor with respect to the voltage of at least one phase provided to the induction motor, and a control apparatus coupled to the sensing device and to the power-delivery sub-system for regulating at least one of the feeding voltages, so that the derivative of the active power with respect to the voltage of that at least one phase is always substantially zero; thus for a given mechanical power output the power consumption of the induction motor is optimized, while concurrently losses in the feeding conductors are being minimized.
REFERENCES:
patent: 3044008 (1962-07-01), Cooley
patent: 3287624 (1966-11-01), Perry
patent: 3427530 (1969-02-01), Oakes et al.
patent: 3544885 (1970-12-01), Friedlander et al.
patent: 3723840 (1973-03-01), Opal et al.
patent: 3763413 (1973-10-01), Wattenbarger
patent: 3851234 (1974-11-01), Hoffman et al.
patent: 4013937 (1977-03-01), Pelly et al.
patent: 4276505 (1981-06-01), Bose
patent: 4387329 (1983-06-01), Harlow
patent: 4408149 (1983-10-01), Collings et al.
patent: 4445078 (1984-04-01), Lange
patent: 4477761 (1984-10-01), Wolf
patent: 4554502 (1985-11-01), Rohatyn
Rowan et al., "A Quantative Analysis of Induction Motor Performance Improvement by SCR Voltage Control", Power Electronic Conference Record, Jan. 1982, pp. 312-321.
Queenboro Instruction Book #1060, Queenboro Transformer & Machinery Corp. College Point, New York.
Rohatyn, F. "Automatic Voltage-Drop Compensation", Queenboro Transformer & Machinery Corp. College Point, N.Y.
Smith Jr. David
Teltscher Erwin S.
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