ISSN (online) : 2395 - 7549

 
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Energy Efficient Variable Speed High Power Factor Three Phase Induction Motor Drive using Combined PWM and Extinction Angle Control


Author(s):

Mrs. Sangita H. Deshmukh , Department of Electrical Engineering, Shri Ramdeobaba College of Engineering and Managment,Nagpur-13; Sangita H Deshmukh, Shri Ramdeobaba College of Engineering and Managment; Ms. Medha R. Giri, Rajiv Gandhi College of Engineering and Technology; Afsana Shaik, Shri ramdeobabab college of engineering and Managment; Dr. D. R. Tutakne, Shri Ramdeobaba College of Engineering and Managment

Keywords:

Extinction Angle Control (EAC), Pulse Width Modulation Control (PWM), Extinction Angle (β), Power Factor (PF), Induction Motor (IM)

Abstract:

Paper presents a new energy efficient technique of three phase AC to AC voltage control using medium frequency pulse width modulation and extinction angle control. This technique is deployed to obtain independent control on speed and power factor of the three phase induction motor, using four semiconductor controllable switches. The technique has been realized using AC freewheeling switch. Power factor (PF) of induction motor reduces as it depends on the load parameters, thus induction motor draws more current, increase stator copper losses. Increased stator copper losses of induction motor causes depreciation of power factor and efficiency. Proposed drive maintains power factor of induction motor at unity for controllable speed of the motor. Thus reduces current consumption of the motor at low speeds. Stator copper losses also reduce and efficiency of the motor is improved. Advantage of proposed drive is its higher efficiency and unity power factor with simplicity of control. .If number of motors are driven using the proposed drive, plenty of power conservation is possible.

Other Details:

Manuscript Id :J4RV2I6005
Published in :Volume : 2, Issue : 6
Publication Date: 01/09/2016
Page(s): 17-23
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