Utility current feedback filter with pulse-width modulated power

Electric power conversion systems – Current conversion – With means to introduce or eliminate frequency components

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

363 97, 323207, H02M 75395

Patent

active

055262520

ABSTRACT:
A utility feedback filter for a self-commutated, pulse-width modulated power electronic converter. A feedback node is coupled to detect the utility current which is then utilized in a feedback loop through a feedback circuit. The feedback processed utility current is summed with the requested utility current, and the difference is used to generate a pulse-width modulation pattern. The damping factor can be adjusted by the feedback circuit, which preferably has a transfer function of K.sub.f +K.sub.d, where K.sub.f is a proportional feedback gain and K.sub.d is a derivative feedback gain. Utilization of the actual utility current provides precise control of the current supplied to the utility, which substantially reduces or even eliminates the high frequency harmonic components. Furthermore, by proper choice of the components in the feedback circuit, the resistive value of a damping resistor can be decreased, thereby reducing wasteful dissipation of power.

REFERENCES:
patent: 4251735 (1981-02-01), Coleman
patent: 4251736 (1981-02-01), Coleman
patent: 4277692 (1981-07-01), Small
patent: 4666020 (1987-05-01), Watanabe
patent: 4700081 (1987-10-01), Kos et al.
patent: 4719550 (1988-01-01), Powell et al.
patent: 4780660 (1988-10-01), Shima et al.
patent: 4903184 (1990-02-01), Hirose
patent: 4942511 (1990-07-01), Lipo et al.
patent: 4954726 (1990-09-01), Lipman et al.
patent: 4994981 (1991-02-01), Walker et al.
patent: 5111058 (1992-05-01), Martin
patent: 5150032 (1992-09-01), Ho
patent: 5172009 (1992-12-01), Mohan
patent: 5187427 (1993-02-01), Erdman
patent: 5241217 (1993-08-01), Severinsky
patent: 5243224 (1993-09-01), Tagney, Jr.
patent: 5272429 (1993-12-01), Lipo et al.
00i, et al., "An Integrated AC Drive System Using a Controlled-Current PWM Rectifier/Inverter Link", 17th Annual IEEE Power Electronics Specialists Conference, 1986, pp. 494-501.
Murphy, et al., "Power Electronic Control of AC Motors", Pergamon Press, 1988, Section 4.5 The Three-Phase Bridge PWM Inverter, pp. 123-147, and Section 7.13, Implementation of Field-Oriented Control, pp. 320-330.
Niermeyer, et al., "AC-Motor Drive with Regenerative Braking and Reduced Supply Line Distortion", Aachen, 1989, pp. 1921-1926.
Shoji et al., "Current Source Rectifier/Inverter System with Sinusoidal Currents", IEEE, 1988, pp. 909-914.
Sul, et al., "Design of an Optimal Discrete Current Regulator", IEEE Industry Applications Society Annual Meeting, Part 1, 1989, pp. 348-354.
Ogata, Modern Control Engineering, Prentice Hall, 1970, p. 526.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Utility current feedback filter with pulse-width modulated power does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Utility current feedback filter with pulse-width modulated power, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Utility current feedback filter with pulse-width modulated power will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-358073

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.