Electricity: power supply or regulation systems – Output level responsive – Using a transformer or inductor as the final control device
Patent
1988-01-06
1988-12-13
Beha, Jr., William H.
Electricity: power supply or regulation systems
Output level responsive
Using a transformer or inductor as the final control device
323344, G05F 126
Patent
active
047913487
ABSTRACT:
A pulse-width ac voltage regulator that provides a precisely ac output voltage without the need for any inefficient protective circuitry for ensuring proper operation when it repeatedly switches between its two alternative operating modes. A transformer is arranged with a first winding connected between an input terminal and an output terminal and a second winding connected between one end of the first winding and a control terminal. A special switch assembly including four separate circuits, each having a series connected transistor and diode, is controllably switched such that the second winding is alternatively shorted or excited, to provide a stepped-up (or stepped-down) voltage out of the first winding. The transistors are controllably switched at a frequency substantially greater than that of the ac input signal and at a duty cycle selected to provide the desired ac output voltage. Each time a transistor in the assembly is biased ON or OFF, electrical current is immediately diverted from one transistor to another, without the need for any inefficient snubber circuit or the like.
REFERENCES:
patent: 2180193 (1939-11-01), Brand
patent: 3295053 (1966-12-01), Perrins
patent: 3360714 (1967-12-01), Borkovitz et al.
patent: 3371246 (1968-02-01), Kawauchi et al.
patent: 3596172 (1971-07-01), Harrison
patent: 3944909 (1976-03-01), Reymond
patent: 4745352 (1988-05-01), McGuire
Thomas, Charles E., "60 Hz Electronic Power Conditioner Regulates Voltage, Attenuates Transients and Harmonics," PCIM, Dec. 1986, pp. 16-20.
Holmes, Jr. Charles M.
McGuire Thomas B.
Beha Jr. William H.
Square D Company
LandOfFree
Switching ac voltage regulator does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Switching ac voltage regulator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Switching ac voltage regulator will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2198115