Electricity: power supply or regulation systems – External or operator controlled – Phase controlled switching using electronic tube or a three...
Patent
1981-09-09
1984-01-17
Wong, Peter S.
Electricity: power supply or regulation systems
External or operator controlled
Phase controlled switching using electronic tube or a three...
323319, 323272, G05B 2402, G05F 146
Patent
active
044266154
ABSTRACT:
A solid state electronic power switch selectively controls power delivered to a load such as a fan. A momentary contact control switch is provided which is connected to a switching logic circuit whose output state changes when the control switch is activated. A plurality of power control circuits are connected in parallel with one another and in series with a load across a power source. Each of the power control circuits includes either an SCR or a triac element. A turn-on control circuit is provided connected to the SCR or triac for initial turn-on only when a voltage across the element is small compared to a peak-to-peak voltage across it prior to application of gate voltage. With the system of the invention, the load such as a fan can be operated at various discrete power levels without the associated mechanical and electrical noise problems of previous systems.
REFERENCES:
patent: 3353078 (1967-11-01), Maynard
patent: 3403314 (1968-09-01), Maynard
patent: 3447057 (1969-05-01), Brown et al.
patent: 3448361 (1969-06-01), Dinter
patent: 3466529 (1969-09-01), Grafham
patent: 3470436 (1969-10-01), Steele
patent: 3475677 (1969-10-01), Swinehart et al.
patent: 3539892 (1970-11-01), Lindberg
patent: 3551787 (1970-12-01), Walters
patent: 3596158 (1971-07-01), Watrous
patent: 3646560 (1972-02-01), Barlow, Jr.
patent: 3663950 (1972-05-01), Bartlett
patent: 3739198 (1973-06-01), Clements
patent: 3875486 (1975-04-01), Barton
patent: 3896355 (1975-07-01), Guicheteau
patent: 3925688 (1975-12-01), Kalfus
patent: 4002961 (1977-01-01), Chang
patent: 4037135 (1977-07-01), Novey
patent: 4093899 (1978-06-01), Denny
patent: 4232258 (1980-11-01), Matsumura
Draco Laboratories, Inc.
Wong Peter S.
LandOfFree
Solid state electronic power switch does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Solid state electronic power switch, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Solid state electronic power switch will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-702305