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A simple and novel modulation technique used to produce two-phase symmetric output from two-phase asymmetric input

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5 Author(s)
Salimi, A. ; Fac. of Electr. & Comput. Eng., Shahid Beheshti Univ. G.C., Tehran, Iran ; Esmaeili, M. ; Sadati, A.M. ; Ziar, H.
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In this paper a new modulation technique that can be adopted to obtain various possible output voltages depending on the switching topology and the voltage inputs available is presented. Then this technique is used to obtain a symmetric two-phase sinusoidal voltage with π/2 phase difference from an asymmetric two-phase sinusoidal input. A symmetric two-phase voltage source can be useful in many cases such as driving a two-phase induction motor. Basically two methods are presented here. In the first method the phase difference between the input and output voltages in not controlled whereas in the second method the phase difference is controlled to reach maximum possible amplitude in the output. First the general idea behind this technique is explained and its equations and constraint are derived. Next the technique is used to produce the desired voltage that was mentioned and the proper switching topology is explained. Then the method and its equations and constraints are fully discussed over this particular case. Finally the simulation results are presented and analyzed.

Published in:

Electric Power and Energy Conversion Systems (EPECS), 2011 2nd International Conference on

Date of Conference:

15-17 Nov. 2011

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