AUTOMATIC PHASE ADVANCING IN SWITCHED RELUCTANCE MOTOR BY EMPLOYING A MECHANICAL GOVERNOR

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AFJEI E.; Sahebi m.h.

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Seminar Paper

Paper Information

Seminar: INTERNATIONAL POWER SYSTEM CONFRENCE
Year:2003 | Issue:18

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Title

AUTOMATIC PHASE ADVANCING IN SWITCHED RELUCTANCE MOTOR BY EMPLOYING A MECHANICAL GOVERNOR

Author(s)

AFJEI E. | Sahebi m.h.

Keywords

SWITCHED RELUCTANCE MOTOR

SRM

SWITCHED RELUCTANCE DRIVE

MECHANICAL GOVERNOR IN SRM

Abstract

SWITCHED RELUCTANCE (SR) MOTOR HAS REMARKABLE CHARACTERISTICS THAT MAKE IT ATTRACTIVE FOR HIGH-SPEED APPLICATIONS. AS THE MOTOR’S SPEED INCREASES THE SHAPE OF THE CURRENT WAVEFORM CHANGES IN SUCH WAY THAT LIMITS THE PRODUCTION OF MOTORING TORQUE. AT HIGH SPEEDS, IT IS POSSIBLE FOR THE PHASE CURRENT NEVER REACHES THE DESIRED VALUE DUE TO THE SELF E.M.F. OF THE MOTOR, THEREFORE, THE TORQUE FALLS OFF. IN ORDER TO REMEDY THIS PROBLEM, THE PHASE TURN ON ANGLE IS ADVANCED IN SUCH WAY THAT THE PHASE COMMUTATION BEGINS SOONER. ADVANCING THE COMMUTATION ANGLE OFFERS THE ADVANTAGES OF GETTING THE CURRENT INTO THE PHASE WINDING WHILE THE INDUCTANCE OF THE PHASE IS LOW, AND ALSO OF HAVING A LITTLE MORE TIME TO GET THE CURRENT OUT OF THE PHASE WINDING BEFORE THE ROTOR REACHES THE NEGATIVE TORQUE REGION. SINCE THE SR MOTOR IS A VARIABLE SPEED MOTOR THEN, THE AMOUNT OF ADVANCING FOR THE TURN ON ANGLE SHOULD BE ACCOMPLISHED AUTOMATICALLY ACCORDING TO THE SPEED OF THE MOTOR, MEANING, AS THE MOTOR’ PEED INCREASES SO SHOULD THE TURN ON ANGLE AND VICE VERSA. IN THIS RESPECT, THIS PAPER INTRODUCES A MECHANICAL GOVERNOR MOUNTED ON THE SHAFT OF A SR MOTOR TO ACHIEVE THIS TASK. THE OPENING OF THE GOVERNOR’S ARMS CAUSES 0-14 DEGREES AUTOMATIC ADJUSTMENT IN THE TURN ON ANGLE FROM STAND STILL TO A PRE-SET SPEED. A LINEAR ANALYSIS OF THE CURRENT WAVEFORM FOR THE MOTOR UNDER DIFFERENT ADVANCEMENTS OF THE TURN ON ANGLE HAS BEEN PERFORMED AND THE PLOTS ARE SHOWN. FINALLY, THE EXPERIMENTAL RESULTS OF EMPLOYING THE GOVERNOR ON A 6X4 SR MOTOR ARE PRESENTED.

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APA: Copy

AFJEI, E., & Sahebi, m.h.. (2003). AUTOMATIC PHASE ADVANCING IN SWITCHED RELUCTANCE MOTOR BY EMPLOYING A MECHANICAL GOVERNOR. INTERNATIONAL POWER SYSTEM CONFRENCE. SID. https://sid.ir/paper/905573/en

Vancouver: Copy

AFJEI E., Sahebi m.h.. AUTOMATIC PHASE ADVANCING IN SWITCHED RELUCTANCE MOTOR BY EMPLOYING A MECHANICAL GOVERNOR. 2003. Available from: https://sid.ir/paper/905573/en

IEEE: Copy

E. AFJEI, and m.h. Sahebi, “AUTOMATIC PHASE ADVANCING IN SWITCHED RELUCTANCE MOTOR BY EMPLOYING A MECHANICAL GOVERNOR,” presented at the INTERNATIONAL POWER SYSTEM CONFRENCE. 2003, [Online]. Available: https://sid.ir/paper/905573/en

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