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Investigation on Switching Function Algorithm of Matrix Rectifier under Abnormal Power Supply Conditions
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| Author(s) |
Xi-jun Yang, Peng-sheng Ye, Xing-hua Yang, Jian-quan Wang, Luan-guo Zhang |
| Abstract |
Based on the switching function algorithm of the
traditional matrix converter, that of matrix rectifier (MR) is
derived in positive and negative phase sequence with fourquadrant
capability. Afterward that of MR under
unbalanced input voltage conditions is also derived by
detecting and using instantaneous values of input voltages.
But the gained algorithm in the case is not fully suitable for
the unbalanced conditions without any modification, such as
amplitude unbalance, initial phase angle unbalance and
waveform distortion. This is mainly because the constraints
of switching function algorithm would be destroyed, even
worse at high desired DC output voltage. The constraints
include two aspects: the sum of relative switching functions
for an output phase is always zero and the value of each
switching function is within [0, 1]. At this point, a simple
process method is proposed to meet the constraints to a
large extent by means of regulating each switching function
according to the actual unbalance before use. Eventually
thorough simulations are performed with Simulink6.0
under balanced and unbalanced conditions, inclusive of
input voltage and input current waveforms, output DC
voltage waveforms, etc. The simulation results prove the
theoretical analysis. |
| Download |
| Filename: | T2-312.pdf |
| Filesize: | 292.4 KB |
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| Type |
Members Only |
| Date |
Last modified 2007-03-08 by System |
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