A control algorithm to minimize torque ripple and acoustic noise of switched reluctance motors

Download

index.pdf

Date

2008

Author

Bizkevelci, Erdal

Metadata

Show full item record

Item Usage Stats

282
views

221
downloads

Despite its simple construction, robustness and low manufacturing cost, the application areas of SR motors are remained limited due to the high level of acoustic noise and torque ripple. In this thesis work, two different type of controllers are designed and implemented in order to minimize the acoustic noise and torque ripple which are considered as the major problems of SR motors. In this scope, first the possible acoustic noise sources are investigated. A sliding mode controller is designed and implemented to reduce the shaft torque ripple which is considered as a major source of acoustic noise. The performance of the controller is experimentally tested and it is observed that especially in low speed region reduction of torque ripple is significant. The torque ripple minimization performance of the controller is also tested at different speeds and the acoustic noise levels are recorded simultaneously. Comparing the noise mitigation with the noise reduction the correlation between the acoustic noise and shaft torque ripple is investigated. The results obtained from this investigation indicated that the torque ripple is not a major source of acoustic noise in SR motors. After this finding, radial force which is the other possible acoustic noise source of SRM is taken into consideration. The effects of control parameters on radial force and the motor efficiency are investigated via simulations. With the intuition obtained from this analysis, a switching angle neuro-controller is designed to minimize the peak level of radial forces. The performance of the mentioned controller is verified through noise records under steady state conditions. Regarding to the radial force simulations and the acoustic noise measurements, it is deduced that the radial force is the major source of acoustic noise. On the other hand, another controller is designed and implemented which increases the average torque per ampere value in order to increase the efficiency of the motor. It is seen that this controller has a good effect on increasing the efficiency but does not guarantee to operate at maximum efficiency.

Subject Keywords

Electrical engineering.

URI

http://etd.lib.metu.edu.tr/upload/2/12609866/index.pdf
https://hdl.handle.net/11511/17965

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Measurement of brushless dc motor characteristics and parameters and brushless dc motor design Şahin, İlker; Ertan, Hulusi Bülent; Department of Electrical and Electronics Engineering (2010) The permanent magnet motors have become essential parts of modern motor drives recently because need for high efficiency and accurate dynamic performance arose in the industry. Some of the advantages they possess over other types of electric motors include higher torque density, higher efficiency due to absence of losses caused by field excitation, almost unity power factor, and almost maintenance free construction. With increasing need for specialized PM motors for different purposes and areas, much effort...
A novel algorithm for prediction off-line stator leakage inductance and on-line stator resistance of induction motors Sezgin, Volkan; Ertan, Hulusi Bülent; Department of Electrical and Electronics Engineering (2009) In vector control of induction motors it is essential to know the parameters of the motor. Known approaches to this problem have some drawbacks. This thesis work is planned to develop solutions to the existing problems. The proposed solutions will be implemented and tested.
A current source converter based statcom for reactive power compensation at low voltage Biçer, Nazan; Ermiş, Muammer; Department of Electrical and Electronics Engineering (2010) This research work is devoted to the analysis, design and development of the Current-Source Converter (CSC) based distribution-type Static Synchronous Compensator (D-STATCOM) for low-voltage applications in reactive-power control in order to achieve i) faster transient response in reactive-power control, ii) lower current harmonic distortion, iii) lower power losses and iv) minimum storage elements in comparison with conventional solutions. The developed CSC-D-STATCOM includes a low-pass input filter and a ...
Novel impedance tuner, phase shifter, and vector modulators using rf mems technology Ünlü, Mehmet; Demir, Şimşek; Department of Electrical and Electronics Engineering (2009) This thesis presents the theory, design, fabrication, and measurement results of novel reconfigurable impedance tuner, phase shifter, and vector modulators using the RF MEMS technology. The presented circuits are based on triple stub topology, and it is shown both theoretically and experimentally in this thesis that it is possible to control the insertion phase and amplitude of the input signal simultaneously using this topology. The presented circuits are implemented using an in-house, surface micromachini...
Investigation of multilevel inverters for d-statcom applications Deniz, Mustafa; Ermiş, Muammer; Department of Electrical and Electronics Engineering (2009) The most important advantages of Multilevel Inverters are the absence of a coupling transformer for medium voltage applications and low harmonic current content. In this way, relocatable and economical STATCOM systems can be realized. Complex control algorithms and the isolation problems of measurement devices and power supplies are the main challenging parts of this type of application. In this study, the design, realization, and the performance of a Voltage Source Type Cascaded Multilevel Converter Based ...

Citation Formats

E. Bizkevelci, “A control algorithm to minimize torque ripple and acoustic noise of switched reluctance motors,” Ph.D. - Doctoral Program, Middle East Technical University, 2008.