Electricity: motive power systems – Induction motor systems – Primary circuit control
Patent
1992-10-26
1994-03-22
Ip, Paul
Electricity: motive power systems
Induction motor systems
Primary circuit control
318779, 318786, H02P 142, H02P 144
Patent
active
052967956
ABSTRACT:
A solid state starting system for electric motors having main and auxiliary windings of the capacitor start induction run and capacitor start-capacitor run types uses a triac serially connected to the auxiliary winding. The system differentially measures the auxiliary winding voltage and provides a triac gate signal when in the START mode. When the auxiliary voltage reaches a calibratable cut-out voltage the triac is disabled until the auxiliary winding voltage decreases to a level below a calibratable cut-in voltage. The slope of the percent motor speed cut-out versus percent line voltage is calibratable to permit compensation for variations in line voltage. The triac can be directly driven or driven through an optically coupled interface having a triac output (OCI).
REFERENCES:
patent: 4382217 (1983-05-01), Horner et al.
patent: 4395671 (1983-07-01), Sandler et al.
patent: 4401933 (1983-08-01), Davy et al.
patent: 4409532 (1983-10-01), Hollenbeck et al.
patent: 4453118 (1984-06-01), Phillips et al.
patent: 4604563 (1986-08-01), Min
patent: 4622506 (1986-11-01), Shemanske et al.
patent: 4670697 (1987-06-01), Wrege et al.
patent: 4751449 (1988-06-01), Chmiel
patent: 4751450 (1988-06-01), Lorenz et al.
patent: 4782278 (1988-11-01), Bossi et al.
patent: 4804901 (1989-02-01), Pertessis et al.
patent: 4862053 (1989-08-01), Jordan et al.
Alvernaz James
Dropps Kevin J.
Fugere Robert H.
Thompson Herbert A.
Baumann Russell E.
Donaldson Richard L.
Grossman Rene E.
Ip Paul
Texas Instruments Incorporated
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