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Control methods for the synchronization and phase shift of the pulse width modulation (PWM) strategy of power converters

  • US 20080284252A1
  • Filed: 05/15/2008
  • Published: 11/20/2008
  • Est. Priority Date: 05/19/2007
  • Status: Active Grant
First Claim
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1. A method of controlling a plurality of power converters that can be used to interface to a supply network, each power converter comprising a network bridge operating in accordance with a pulse width modulation (PWM) strategy having the same switching period and which causes at least one unwanted harmonic in the supply network voltage, the method comprising the step of providing the switching period of the PWM strategy of each network bridge with a different time offset relative to a time datum such that the at least one unwanted harmonic in the supply network voltage is at least partially cancelled.

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