Alternating current power control device
US5808454A · kind A · utility
Inventor
Key dates
| Filing date | Feb 28, 1997 |
| Grant date | Sep 15, 1998 |
| Priority date | — |
| Expiry date | Feb 28, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F1/66
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An alternating current power control device including a phase comparison controller for comparing a phase of an input voltage with that of a first reference voltage, a single-winding transformer for varying the input voltage, a mutual induction reactor for lowering the input voltage by a desired level in response to an output voltage from the single-winding transformer, an output voltage comparator for comparing an output voltage with a second reference voltage, an output current comparator for comparing an output current with a reference current, an OR logic controller for performing an OR operation with respect to output signals from the phase comparison controller and output current comparator, and a switch array for selectively transferring the output voltage from the single-winding transformer to the mutual induction reactor in response to output signals from the output voltage comparator and OR logic controller. According to the present invention, the mutual induction reactor is implemented on the basis of the principle of a linear transformer and has a small capacity corresponding to about 1/10 of a load power. Therefore, a proper power necessary to the saving of energy can …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.