The Active Flux Concept for Motion-Sensorless Unified AC Drives: a review

Date

2011-09-10

Author

Boldea, I.
Agarlita, S. C.

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

249
views

0
downloads

Rotor and stator flux orientations are now standard concepts in vector and direct torque control of ac drives. The salient-pole rotor machines, where magnetic saturation plays a key role, still pose notable problems in flux, rotor position and speed estimations for motion-sensorless control, especially in the low-speed range (below 30 rpm in general), leading to numerous dedicated state observers. This paper review introduces a rather novel (or generalization) concept active flux or torque-producing flux and its utilization in all ac drives by employing a unified state observer for motion-sensorless control in a wide speed range. The active-flux concept "turns all salient-pole traveling field machines into nonsalient-pole ones". The active-flux vector is aligned to the rotor axis for all synchronous machines and to the rotor-flux vector axis for induction machines. This way, the rotor position and speed observer seems more amenable to a wide speed range, with smaller dynamic errors. This observer, based on the active-flux concept, is pretty much the same for all ac drives. Example of implementation, for IPMSMs, RSM, dc-excited SM with experiments are reviewed to illustrate de concept.

Subject Keywords

AC motor drives, Magnetic, Estimation, Active flux

URI

https://hdl.handle.net/11511/65798

Collections

Unclassified, Conference / Seminar

Suggestions

OpenMETU
Core

The Design, control and performance performance analysis of AC motor drives with front end diode rectifier utilizing low capacitance DC bus capacitor and comparison with conventional drives Aban, Vahap Volkan; Hava, Ahmet Masum; Department of Electrical and Electronics Engineering (2012) In this thesis the design, control, stability, input power quality, and motor drive performance of ac motor drives with front end three phase diode rectifiers utilizing low capacitance dc bus capacitor are investigated. Detailed computer simulations of conventional motor drives with diode rectifier front end utilizing high capacitance dc bus capacitor and the drives with low capacitance dc bus capacitor are conducted and the performances are compared. Performance evaluation of various active control methods...
A novel approach to detection of some parameters of induction motors Özlü Ertan, Hatice Gülçin; Colak, Baris (2007-05-05) This paper describes a novel approach for offline stator leakage inductance and online stator resistance estimation that can be used for self-tuning of induction motor drives. The paper briefly describes the theory behind the approach. The proposed methods are experimentally tested on an industrial induction motor and also tested on a washing machine motor designed for variable speed operation. Test results are given and the robustness of the approach is illustrated.
A Comparative Study on Non-Linear State Estimators Applied to Sensorless AC Drives: MRAS and Kalman Filter Akin, Bilal; Orguner, Umut; Ersak, Aydin; Ehsani, Mehrdad (2004-11-06) In this paper, two different nonlinear estimators applied to sensorless AC drives, Kalman Filtering techniques (EKF and UKF) and Model Reference Adaptive System (back emf ans reactive power models), are discussed and compared to each other. Both of the observer types are studied and analyzed both experimentally and theoretically. In order to compare the observers precisely, the observers are tested under the identical conditions.
Prediction of torque and inductance displacement characteristics of asymmetrically slotted variable-reluctance motors using a simplified model for numerical field solution Ertan, Hulusi Bülent (1999-09-01) For prediction of static and dynamic performance of doubly-salient motors, it is essential to know their flux linkage-position-excitation characteristics and also the static torque characteristics. At the design stage determination of these characteristics presents difficulties because of highly nonlinear behavior of the magnetic circuit. It is possible to use numerical field solution of the complete motor to obtain this information. This, however, requires expertise on a professional program and may be exp...
Evaluation of a 6 pole axial flux PM motor for Control Moment Gyroscope Application Zeinali, Raza; Ertan, Hulusi Bülent (2015-09-04) In a previous study a compact Control Moment Gyroscope (GMC) design, based on a 6-pole, axial flux (AF) motor was presented. The GMC design in that proposal was based on analytical expressions and naturally 3-D structure of the AF motor could not be fully taken into account. In this paper the designed motor is simulated using 3-D FEM solutions. The parameters of the design such as electric loading and current loading as well as the performance of the design such as phase current and the torque produced at 1...

Citation Formats

I. Boldea and S. C. Agarlita, “The Active Flux Concept for Motion-Sensorless Unified AC Drives: a review,” 2011, p. 1, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/65798.