Automatic calibration of field-oriented elevator motor drive par

Elevator – industrial lift truck – or stationary lift for vehicle – With monitoring – signalling – and indicating means – Monitors operational parameter

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

318607, 64148, 181296, B66B 128, H02P 528, G05B 1302

Patent

active

058833447

ABSTRACT:
An elevator controller 7 is provided with logic 48 which automatically calculates a motor time constant (.tau..sub.R), a torque constant (K.sub.T *), and a magnetizing current (Id) for a field-oriented motor/drive system by calculating a transient inductance L.sigma., injecting a variable input frequency sinewave into a q-axis reference current I.sub.qREF and varying the input frequency while calculating an imaginary part of a rotor impedance Imag(Z.sub.R) to obtain a frequency (F.sub.PEAK) at which the maximum value of Imag(Z.sub.R) occurs, then calculating .tau..sub.R from F.sub.PEAK. K.sub.T *, Id, and a total motor voltage V.sub.M are calculated and Id is varied until a ratio of rated motor voltage (Vph.sub.-- RATED) to V.sub.M is within a predetermined tolerance of one. The procedure is performed with the rotor locked.

REFERENCES:
patent: 5476158 (1995-12-01), Mann et al.
patent: 5689169 (1997-11-01), Kerkman et al.
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 Industry 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. Summer 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 Correlation Method, University Paderborn--Germany, The European Power Electronics Association 1993, pp. 97-102.
Wang et al, An Automated rotor time Constant Measurement System for Indirect Field-Oreinted 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 Dymanics of AC Drives, Oxform Science Publications, pp. 205-251.
DeDoncker et al, The Unversity Field Oriented Controller, Unversity 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.

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

Automatic calibration of field-oriented elevator motor drive par 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 calibration of field-oriented elevator motor drive par, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatic calibration of field-oriented elevator motor drive par will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-819401

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