Unified sensorless vector control of synchronous and induction motors

In this paper, a unified theory for sensorless flux estimation and vector control of induction motors and nonsalient permanent-magnet synchronous motors (PMSMs) is developed. It is shown that an estimator and vector controller for one of the motor types can also be applied to the other, with only minor modifications necessary. Two candidate estimators are considered: a variant of the well-known "voltage model" (VM) and a phase-locked-loop-type speed and position estimator. These are applied to both motor types, and evaluated experimentally. For the nonsalient PMSM, an important result is that synchronization can be guaranteed from any initial rotor position.

[1]  Robert D. Lorenz,et al.  Measuring, modeling and decoupling of saturation-induced saliencies in carrier signal injection-based sensorless AC drives , 2000, Conference Record of the 2000 IEEE Industry Applications Conference. Thirty-Fifth IAS Annual Meeting and World Conference on Industrial Applications of Electrical Energy (Cat. No.00CH37129).

[2]  Lennart Harnefors,et al.  Design and analysis of general rotor-flux-oriented vector control systems , 2001, IEEE Trans. Ind. Electron..

[3]  Manfred Schroedl.  Sensorless control of permanent magnet synchronous motors , 1994 .

[4]  G.M. Asher,et al.  The effect of rotor design on sensorless speed estimation using rotor slot harmonics identified by adaptive digital filtering using the maximum likelihood approach , 1997, IAS '97. Conference Record of the 1997 IEEE Industry Applications Conference Thirty-Second IAS Annual Meeting.

[5]  Marko Hinkkanen,et al.  Modified integrator for voltage model flux estimation of induction motors , 2003, IEEE Trans. Ind. Electron..

[6]  Toshihiko Noguchi,et al.  A New Quick-Response and High-Efficiency Control Strategy of an Induction Motor , 1986, IEEE Transactions on Industry Applications.

[7]  F. Meibody-Tabar,et al.  A globally converging observer of mechanical variables for sensorless PMSM , 2000, 2000 IEEE 31st Annual Power Electronics Specialists Conference. Conference Proceedings (Cat. No.00CH37018).

[8]  Hans-Peter Nee,et al.  Model-based current control of AC machines using the internal model control method , 1995 .

[9]  Bimal K. Bose,et al.  A programmable cascaded low-pass filter-based flux synthesis for a stator flux-oriented vector-controlled induction motor drive , 1997, IEEE Trans. Ind. Electron..

[10]  Dong-Seok Hyun,et al.  An improved stator flux estimation for speed sensorless stator flux orientation control of induction motors , 1998 .

[11]  Lennart Harnefors,et al.  Torque-maximizing field-weakening control: design, analysis, and parameter selection , 2001, IEEE Trans. Ind. Electron..

[12]  Nik Rumzi Nik Idris,et al.  An improved stator flux estimation in steady state operation for direct torque control of induction machines , 2000 .

[13]  Shinji Wakao,et al.  New approaches with sensorless drives , 2000 .

[14]  Bimal K. Bose,et al.  Power Electronics and Variable Frequency Drives , 1996 .

[15]  Thomas G. Habetler,et al.  Sensorless speed measurement using current harmonic spectral estimation in induction machine drives , 1994 .

[16]  Roberto Oboe,et al.  Sensorless full-digital PMSM drive with EKF estimation of speed and rotor position , 1999, IEEE Trans. Ind. Electron..

[17]  M. Depenbrock,et al.  Direct self-control (DSC) of inverter-fed induction machine , 1988 .

[18]  R. D. Lorenz,et al.  Rotor position and velocity estimation for a salient-pole permanent magnet synchronous machine at standstill and high speeds , 1998 .

[19]  Hans-Peter Nee,et al.  A general algorithm for speed and position estimation of AC motors , 2000, IEEE Trans. Ind. Electron..

[20]  R. Lorenz,et al.  A physically insightful approach to the design and accuracy assessment of flux observers for field oriented induction machine drives , 1992 .

[21]  J. Stensby,et al.  Phase-Locked Loops: Theory and Applications , 1997 .

[22]  L. Harnefors,et al.  Instability phenomena and remedies in sensorless indirect field oriented control , 2000 .