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Synchronous optimal pulse width modulation (SO- PWM) techniques provide an appropriate solution to the increasing demand on very low switching frequencies of power semiconductors, in order to reduce switching losses. The shape of their pulse patterns is offline computed, and the modulation techniques assume a steady state operation of the drive system. Medium voltage drives when applied to the retrofit...
In order to reduce the switching frequencies of power semiconductors, synchronous optimal pulse width modulation provides an appropriate solution. The switching angles result from complex offline calculations, assuming steady-state operation. Medium voltage drives when applied to the retrofit of existing fixed speed induction motors often include an output LC-filter which introduces a resonant circuit...
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