Electricity: motive power systems – Induction motor systems – Primary circuit control
Patent
1984-12-11
1986-08-05
Smith, Jr., David
Electricity: motive power systems
Induction motor systems
Primary circuit control
318785, H02P 104
Patent
active
046045635
ABSTRACT:
In an AC motor having a main winding (1) and a start winding (2) both connectable to an AC power source (3), and having a switch (22) for disconnecting the start winding from the AC source, an improved control circuit for the switch is provided. A pulse generator (15) responds to main and start winding or capacitor voltage sensors (11 and 12) for generating a first set of variable width output pulses (16) having a width determined by the phase differential between the voltages. A comparator timer (17) responds to the pulse generator for outputting a second set of variable width pulses (18) having a width determined by the amount of which the pulse width of the pulses of first set (16) exceed a selected duration (42). An output pulse detector (20) responds to the comparator timer for detecting the second set of variable width pulses and outputs a delayed turn-off signal (21) to the switch (22).
REFERENCES:
patent: 1974989 (1934-09-01), Hamm
patent: 2181734 (1939-11-01), Mooney
patent: 2576084 (1951-11-01), Trevitt
patent: 2774021 (1956-12-01), Ehret
patent: 2919391 (1959-12-01), Charbonneaux
patent: 2929978 (1960-03-01), Petrocelli
patent: 2991402 (1961-07-01), Tamotsu Imada et al.
patent: 3071717 (1963-01-01), Gordon
patent: 3071718 (1963-01-01), Gordon
patent: 3116445 (1963-12-01), Wright
patent: 3202899 (1965-08-01), Gambill et al.
patent: 3226620 (1965-12-01), Elliott et al.
patent: 3258668 (1966-06-01), Milligan
patent: 3307093 (1967-02-01), Wright
patent: 3349307 (1967-10-01), Licata et al.
patent: 3414789 (1968-12-01), Prouty
patent: 3421064 (1969-01-01), Phillips
patent: 3453516 (1969-07-01), Conner
patent: 3530348 (1970-09-01), Conner
patent: 3573579 (1971-04-01), Lewus
patent: 3667017 (1972-05-01), Ramirez
patent: 3671830 (1972-06-01), Kruper
patent: 3761792 (1973-09-01), Witney et al.
patent: 3766457 (1973-10-01), Fink, Jr. et al.
patent: 3777232 (1973-12-01), Woods et al.
patent: 3792324 (1974-02-01), Suarez et al.
patent: 3859591 (1975-01-01), Saunders
patent: 3882364 (1975-05-01), Wright et al.
patent: 3895275 (1975-07-01), Rostad
patent: 3950657 (1976-04-01), Sheng et al.
patent: 3970908 (1976-07-01), Hansen et al.
patent: 4065804 (1977-12-01), Rostad
patent: 4072880 (1978-02-01), Oshima et al.
patent: 4145646 (1979-03-01), Werderitch
patent: 4152758 (1979-05-01), Bailey et al.
patent: 4292555 (1981-09-01), Schaefer
patent: 4307327 (1981-12-01), Streater et al.
patent: 4325012 (1982-04-01), Schaefer
patent: 4361792 (1982-11-01), Davis, Jr. et al.
patent: 4366426 (1982-12-01), Turlej
patent: 4375613 (1983-03-01), Fuller et al.
patent: 4382217 (1983-05-01), Horner et al.
patent: 4395671 (1983-07-01), Sandler et al.
patent: 4399394 (1983-08-01), Ballman
patent: 4401933 (1983-08-01), Davy et al.
patent: 4422023 (1983-12-01), Iwasawa et al.
patent: 4422030 (1983-12-01), McAllise
patent: 4453118 (1984-06-01), Phillips et al.
patent: 4496895 (1985-01-01), Kawate et al.
Excerpted from the article "What's New in Rotary Speed Switches", by Milton Leonard, Associate Editor, Machine Design; Jul. 27, 1972, Copyright, 1972, by the Penton Publishing Co., Cleveland, Ohio.
SCR Manual, Fourth Edition, General Electric, 1967, pp. 222-223, General Electric Company, Dept. B. 3800 North Milwaukee Ave., Chicago, IL 60641.
"Single-Phase Two-Valued Capacitor Motor Relay Section", D. L. Trower and C. Evert, AIEE Transactions, Feb. 1962, pp. 1141-1143.
PT Components, Inc.
Smith Jr. David
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