Filter with increased first harmonic response and reduced...

Electricity: motive power systems – Induction motor systems – Primary circuit control

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C318S727000, C318S807000, C318S503000

Reexamination Certificate

active

07106024

ABSTRACT:
A method and apparatus for use with a controller that supplies voltages to an induction machine via supply lines, the voltages including a fundamental voltage component and an injected voltage component, the line voltages also including harmonic voltage components where the harmonic voltage components include at least a high frequency first harmonic component having a frequency substantially equal to the sum of the fundamental component frequency and the injected component frequencies, the method for identifying the high frequency first harmonic component and comprising the steps of sensing the line voltages, identifying a zero sequence voltage component of the line voltages, rectifying the zero sequence voltage component to generate a rectified signal and using the rectified signal to identify the high frequency first harmonic component.

REFERENCES:
patent: 4196463 (1980-04-01), Dickerson
patent: 4775924 (1988-10-01), Sweezy
patent: 5446923 (1995-08-01), Martinson et al.
patent: 5502360 (1996-03-01), Kerkman et al.
patent: 5559419 (1996-09-01), Jansen et al.
patent: 5608276 (1997-03-01), Suelzle
patent: 5614770 (1997-03-01), Suelzle
patent: 5668457 (1997-09-01), Motamed
patent: 5689169 (1997-11-01), Kerkman et al.
patent: 5731698 (1998-03-01), Fujii et al.
patent: 5793167 (1998-08-01), Liang et al.
patent: 6239582 (2001-05-01), Buzan et al.
patent: 6281659 (2001-08-01), Giuseppe
patent: 6710495 (2004-03-01), Lipo et al.
patent: 2003/0085627 (2003-05-01), Lipo et al.
A New Zero Frequency Flux Position Detection Approach for Direct Field Oriented Control Devices, 1999 IEEE, pp. 2290-2297, Consoli, et al.
Using Multiple Saliencies for the Estimation of Flux, Position, and Velocity in AC Machines, IEEE Trans. of Ind. Applns, vol. 34, No. 5, Sep./Oct. 1998, pp. 1097-1104, Denner et al.
Sensorless Field Orientation Control of an Induction Machine by High Frequency Signal Injection, IEEE Ind. Applns. Soc., Annual Meeting, Oct. 1997, pp. 426-432, Ha et al.
Air-Gap Flux Position Estimation of Inaccessible Neutral Induction Machines by Zero Sequence Voltage, 6 pages, Jun. 6, 2000, Consoli et al.
Sensorless Field Oriented Control Using Common Mode Currents, 2000, 8 pages, Consoli et al.
U.S. Appl. No. 10/610,427 filed Jun. 30, 2003, Flux Position Identifier Using High Frequency Injection, 10 sheets of drawings, Royak, et al.

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

Filter with increased first harmonic response and reduced... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Filter with increased first harmonic response and reduced..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Filter with increased first harmonic response and reduced... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3567241

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