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Power ElectronicsPWM Inverters

In sinusoidal PWM, the frequency modulation ratio is commonly defined as?

  • ACarrier frequency divided by reference frequency
  • BReference amplitude divided by carrier amplitude
  • COutput voltage divided by input voltage
  • DLoad current divided by switch current
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Correct Answer: A. Carrier frequency divided by reference frequency
Explanation: mf=fc/fm, where fc is carrier frequency and fm is the desired fundamental/reference frequency.
Reference: Standard power electronics: pwm inverters
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