Switching device and related operating method

Details Switching device and related operating method Switching device and related operating method

2007-09-11

2007-09-11

Laxton, Gary L (Department: 2838)

Electric power conversion systems

Current conversion

With means to introduce or eliminate frequency components

C455S298000

Reexamination Certificate

active

11395154

ABSTRACT:
A switching device and a method of operating a switching power element are disclosed for generating a train of drive pulses (D1to D32) in a basic pattern for a repetition cycle time (T to TF) having leading time intervals (Th1to Th3, Th1′ to Th3′), associated with leading edges (a1to a32) of the drive pulses, and trailing time intervals (Tl1to Tl3, Tl1′ to Tl3′), associated with trailing edges (b1to b32) of the drive pulses, which are different from each other, whereby switching frequencies and associated harmonics, resulting from the leading edges and the trailing edges of the drive pulses, are diffused. A diffusion frequency, representing an inverse number of the repetition cycle time for the basic pattern is set to be higher than an audible frequency.

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