Elevator – industrial lift truck – or stationary lift for vehicle – With monitoring – signalling – and indicating means
Patent
1997-12-22
1999-04-27
Nappi, Robert E.
Elevator, industrial lift truck, or stationary lift for vehicle
With monitoring, signalling, and indicating means
187296, 318807, B66B 128, H02P 528
Patent
active
058969543
ABSTRACT:
An elevator controller 7 is provided with logic 48 which automatically calculates a motor time constant (.tau..sub.R) for a field-oriented current regulator/motor drive 20 by running the elevator up and down while computing an average of a sign-adjusted error signal DXD.sub.ERR for the up/down run and while varying .tau..sub.R and determining the value of .tau..sub.R at which the average of DXD.sub.ERR for the up and down runs equals zero within a predetermined tolerance. Alternatively, instead of computing the average of DXD.sub.ERR, a single elevator run may be used to determine the value of .tau..sub.R at which DXD.sub.ERR equals zero within a predetermined tolerance.
REFERENCES:
patent: 5476158 (1995-12-01), Mann et al.
patent: 5510689 (1996-04-01), Lipo et al.
patent: 5796236 (1998-08-01), Royak
M. Depenbrock and N.R. Klaes, Determination of the Induction Machine Parameters and their Dependencies on Saturation, Ruhr-University Bochum, Germany, pp. 17-22.
N.R. Klaes, Parameter Identification of an Induction Machine with Regard to Dependencies on Saturation , IEEE Transactions on Industry Application, vol. 29, No. 6, Nov. 1993.
A.M. Khambadkone and J. Holtz, Vector-Controlled Induction Motor Drive with a Self-Commissioning Scheme, IEEE Transactions on Industrial Electronics, vol. 38, No. 5, Oct. 1991.
J. Holtz and T. Thimm, Identification of the Machine Parameters in a Vector-Controlled Induction Motor Drive, IEEE Transactions on Industry Applications, vol. 27, No. 6 Nov./Dec. 1991.
T. Rowan, R. Kerkman and D. Leggate, A Simple On-Line Adaption for Indirect Field Orientation of an Induction Machine, IEEE Transactions on Industry Applications, vol. 27, No. 4 Jul./Aug. 1991.
R. Kerkman, J. Thunes, T. Rowan and D. Schlegel, A Frequency-Based Determination of Transient Inductance and Rotor Resistance for Field Commissioning Purposes, IEEE Transactions on Indusry Applications, vol. 32, No. 3, May/Jun. 1996.
H. Schierling, Self-Commissioning -A Novel Feature of Modern Inverter-Fed Induction Motor Drives, pp. 287-290.
M. Sumner and G. Asher, Autocommissioning for voltage-referenced voltage-fed vector-controlled induction motor drives, IEEE Proceedings, vol. 140, No. 3, May 1993.
Kudor et al, Self-Commissioning for Vector Controller Inductor Motors, IEEE 1993, pp. 528-535.
Tungpimolrut et al, A Direct Measuring Method of Machine Parameters for Vector-Controlled Induction Motor Drives, 1993 IEEE pp. 997-1002.
Green et al, Measurement and On-line Estimation Approaches to a Parameter Variation in Vector Controllers, IEEE Colloq. 1993. pp. 3/1-3/5.
Wade et al, Parameter Identification for Vector Controlled Induction Machines, Heriot-Wat University, UK, pp. 1187-1192.
Bunte et al, Parameter Identification of an Inverter-fed Induction Motor at Standstill with a Correlation Method, Universal Paderborn -Germany, The European Power Electornics Association 1993, pp. 97-102.
Wang et al, An Automated rotor time Constant Measurement System for Indirect Field-Oriented Drives, IEEE Transaction on Industry Applications, vol. 24, No. 1, Jan./Feb. 1988.
Lorenz, Tuning of Field-Oriented Induction Motor Controllers for High-Performance Applications, IEEE Transactions on Industry Applications, vol. 1A-22, No. 2, Mar./Apr. 1986.
D.W. Novotny and T.A. Lipo, Vector Control and Dynamics of AC Drives, Oxform Science Publications, pp. 205-251.
DeDoncker et al, The Universal Field Oriented Controller, University of Wisconsin.
Lorenz et al, A control systems Perspective of field oriented Control for AC Servo Drives, University of Wisconsin.
Novotny and Lipo, WEMPEC, Wisconsin Electric Machines and Power Electronics Consortium, Tutorial Report, Chapter 4-1 -4-73.
Colby Roy Stephen
Greiner Neil
Vecchiotti Alberto
Nappi Robert E.
Otis Elevator Company
LandOfFree
Automatic fine tuning of rotor time constant in field-oriented e does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Automatic fine tuning of rotor time constant in field-oriented e, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatic fine tuning of rotor time constant in field-oriented e will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-678309