Inductance vector angle based sensorless speed estimation in switched reluctance motor drive

Fuat Kucuk, Hiroki Goto, Hai Jiao Guo, Osamu Ichinokura

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Feedbacks signals of rotor speed and motor torque are essential in most of Switched Reluctance (SR) motor control applications. An SR motor has highly nonlinear characteristics that do not allow to be modeled by simple equations. Hence, the feedback signals can not be mathematically calculated from the model. Instead of calculation, they should be measured or estimated. In Direct Torque Control (DTC) drive, which enables easy control of torque ripple in the SR motor, position sensor is employed to obtain the feedback signals. Position sensor causes DTC drive not only less reliable but also more expensive. Estimation of feedback signals is required in order to eliminate position sensor (or encoder). This paper concerns about sensorless speed estimation under the DTC condition and presents a simple method. The proposed method is based on inductance vector angle. The inductance vector angle is obtained by applying α-β transformation to the phase inductances. A relay triggers a speed calculation circuit according to its band limits and the inductance vector angle. Inside the circuit, triggering time is kept in a memory until the next triggering. Then, rotor pole pitch is divided by the time difference between two consecutive triggerings. Finally, the estimation circuit outputs the rotor speed. Estimation method is simulated and verified experimentally to show its validity.

Original languageEnglish
Title of host publication7th Internatonal Conference on Power Electronics, ICPE'07
PublisherIEEE Computer Society
Pages635-639
Number of pages5
ISBN (Print)9781424418725
DOIs
Publication statusPublished - 2007
Event7th Internatonal Conference on Power Electronics, ICPE'07 - Daegu, Korea, Republic of
Duration: 2007 Oct 222007 Oct 26

Publication series

Name7th Internatonal Conference on Power Electronics, ICPE'07

Other

Other7th Internatonal Conference on Power Electronics, ICPE'07
CountryKorea, Republic of
CityDaegu
Period07/10/2207/10/26

ASJC Scopus subject areas

  • Energy Engineering and Power Technology

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