Method of phase synchronization between two AC signals

Details Method of phase synchronization between two AC signals Method of phase synchronization between two AC signals

1992-12-14

1995-10-24

Shoop, Jr., William M.

Electrical transmission or interconnection systems

Plural supply circuits or sources

Substitute or emergency source

307 73, 364492, H02J 700, H02M 700

Patent

active

054612632

ABSTRACT:
An uninterruptible power supply for supplying a load with AC output power generates the AC output power from an AC input source when the AC input source is within settable voltage limits and transfers to generating the AC output power from an auxiliary source of DC power when the AC input source is outside the voltage limits. A microprocessor provides monitoring and sampling of the AC input voltage to determine its amplitude and frequency, and uses this information to set the magnitude and frequency of the AC output voltage by generating a sine reference signal to control the AC output frequency and voltage phase angle. The microprocessor maintains a voltage phase relationship between the AC input power and AC output power to eliminate voltage and current transients at transfer times between the AC and DC input sources that would be present if the AC output suddenly had a drastic, voltage phase angle change. Compensation of the sine reference signal is provided to correct for cycle to cycle sampling time differences.

REFERENCES:
patent: 4827151 (1989-05-01), Okado
patent: 5264732 (1993-11-01), Fiorina et al.

Affiliated with

Also associated with

Rating

Method of phase synchronization between two AC signals does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of phase synchronization between two AC signals, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of phase synchronization between two AC signals will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1888627