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Reduced Switching in Randomized Schemes for DC-DC Power Conversion
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| Author(s) |
S. Sathiakumar, Y. Shrivastava, Y.S. Lee |
| Abstract |
Random switching schemes for power conversion
are expected to reduce annoying electromagnetic interference and
acoustic noise caused by switching. This is achieved by spreading
the spectrum of the switching waveforms in different random
schemes reported in the literature and as a result the output
characteristics of the converter are altered differently. A
comparative study of random pulse width modulated schemes for
DC-DC power converter is presented in this paper. The spectral
performance of four random schemes for the DC-DC power
conversion is studied and their relative merits and demerits are
highlighted. A method to reduce the average switching frequency
of the random schemes without significantly affecting the output
characteristics of the converter is also proposed. The random
schemes discussed as well as the proposed schemes are
implemented using a laboratory setup with a buck converter
driven by the DSP TMS320C240 and the experimental results are
presented comparing the performance of different schemes. |
| Download |
| Filename: | 230 |
| Filesize: | 291 KB |
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| Type |
Members Only |
| Date |
Last modified 2006-02-08 by System |
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