Electronic energy saving device

Electricity: power supply or regulation systems – For phase shift or control

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Details

323207, 363 39, G05F 502

Patent

active

053672461

ABSTRACT:
An automatic power factor correcting device for correcting the power factor of a load connected to a power line having a plurality of confuctors including a neutral conductor, a power line interface circuit for interfacing the device with the power line, a phase sensing circuit connected via the interface circuit to at least two of the conductors for sensing a phase shift between voltage and current in the two conductors. It further includes a phase correction circuit with a plurality of weighted capacitors, and capacitor connecting means having a control input connected to the phase sensing circuit for connecting at least one of the weighted capacitors to the power line for correcting the phase shift on the two conductors.

REFERENCES:
patent: 4446512 (1984-05-01), Jarvinen
patent: 4752726 (1988-06-01), Aoyama et al.
patent: 4812669 (1989-03-01), Takeda et al.
patent: 4857830 (1989-08-01), Matsuno
patent: 5198746 (1993-03-01), Gyugi et al.

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