Speed position estimation by demodulating rotor slot harmonics

Date

2011-11-11

Author

Keysan, Ozan

Metadata

Show full item record

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

Item Usage Stats

153
views

0
downloads

It is well known that slotting harmonics exist in most of the electrical machines. These harmonics may supply valuable information for condition monitoring of bearings, windings or rotor bars. Utilization of these harmonics for rotor speed and position estimation is limited mainly due to long sampling periods required by spectral estimation techniques. In this study, a novel speed and position estimation method is proposed that does not need any kind of spectral estimation. In this approach extracting the required information can be done within a typical control cycle of a vector controlled drive algorithm. In the application of the method, higher order rotor slot harmonics have been utilized. The approach is explained in the paper and illustrated with experimental results.

Subject Keywords

Rotors, Harmonic analysis, Power harmonic filters, Coils, Estimation, Induction motors, Demodulation

URI

https://hdl.handle.net/11511/44720

DOI

https://doi.org/10.1109/icelmach.2010.5607856

Collections

Department of Electrical and Electronics Engineering, Conference / Seminar

Suggestions

OpenMETU
Core

Real-Time Speed and Position Estimation Using Rotor Slot Harmonics Keysan, Ozan; Ertan, Hulusi Bülent (2013-05-01) It is well known that slotting harmonics exist in most of the electrical machines. So far, these harmonics are mainly identified using spectral estimation techniques. However, this approach requires long sampling and computation periods. In this study, a novel speed and position estimation method based on identification of rotor slot harmonics (RSH) that does not require any kind of spectral analysis is proposed. The required information is extracted by demodulating the information available in an external ...
Higher Order Rotor Slot Harmonics for Rotor Speed & Position Estimation Keysan, Ozan; Ertan, Hulusi Bülent (2010-05-21) Air-gap flux of all electrical machines contains harmonics. Some of these harmonics stem from rotor slotting of the machine. These harmonics can be utilized for control or diagnostic purposes. In the literature, rotor slot harmonics are mostly utilized for condition monitoring. There is also some research utilizing them for rotor speed estimation. However, it is observed that in the existing work spectral analysis techniques are employed which require long samples of data and in this from they are not suita...
Implementation issues of real time position estimation for induction motors using rotor slot harmonics Ertan, Hulusi Bülent; Keysan, Ozan (2013-11-15) In this paper, an approach to identify rotor slot harmonics, from motor currents or from induced voltage in an internal or external search coil voltage is described. The importance of this method is that instantaneous value of the rotor slot harmonics can be determined in real time. In this manner, it is possible to determine motor speed or rotor position of a motor in a short enough time, for use in vector control. This method is independent of motor parameters. Using this method an additional feedback bec...
STARTING TRANSIENTS IN SLIP ENERGY RECOVERY INDUCTION-MOTOR DRIVES .1. FORMULATION AND MODELING AKPINAR, E; PILLAY, P; Ersak, Aydın (1992-03-01) A detailed study of the rotor phenomena including the rectifier commutation angle and inverter harmonics is facilitated by the use of the actual rotor conduction sequence variables instead of transformed variables that are used in most other IM drive systems. The starting transients of slip energy recovery IM drives comprising three stages are presented here; (a) the starting from zero speed with a starting resistor connected to the output of the rotor rectifier; (b) a transition period in which the invert...
Efficiency Control of Single Phase Induction Motor Drive Asadabadi, Y. Abdellahi; Markadeh, Gh. R. Arab; Soltani, J.; Heidar, R. (2011-09-10) Single-phase induction motors are widely used in home appliances and industrial control. The multispeed operation and multipurpose operation are provided by controlling the speed of these motors. This paper presents variable-frequency motor drive system implemented by PWAI voltage source inverter, to improve a single-phase induction machine (SIM) efficiency.

Citation Formats

O. Keysan, “Speed position estimation by demodulating rotor slot harmonics,” 2011, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/44720.