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Power ElectronicsPWM Inverters

In sinusoidal PWM, increasing the carrier frequency while keeping the fundamental reference frequency fixed generally moves dominant switching harmonics?

  • ATo higher frequencies
  • BTo DC
  • CExactly onto the fundamental
  • DTo zero frequency
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Correct Answer: A. To higher frequencies
Explanation: Higher carrier frequency shifts switching-related harmonic groups upward, which can simplify output filtering at the cost of higher switching losses.
Reference: Standard power electronics: pwm inverters
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