How Does Modulation Ratio Affect Voltage and Frequency in Power Systems?

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Discussion Overview

The discussion revolves around the modulation ratio of voltage and modulation frequency in power systems, specifically focusing on the relationship between these two concepts in the context of amplitude modulation (AM).

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant inquires about the relationship between modulation ratio and modulation frequency in power systems.
  • Another participant requests clarification on whether the discussion pertains to amplitude modulation (AM), frequency modulation (FM), or other modulation schemes.
  • A participant confirms that the discussion is related to amplitude modulation.
  • It is proposed that there is no relationship between modulation ratio and modulation frequency, as changing the modulating frequency does not affect the percentage of modulation, only the position of the sidebands relative to the carrier frequency.
  • A later reply questions whether the original inquiry pertains to an inverter feeding an AC electrical motor.

Areas of Agreement / Disagreement

Participants express differing views on the relationship between modulation ratio and modulation frequency, with some asserting there is no relationship while others seek clarification on the context of the question.

Contextual Notes

The discussion lacks specific definitions and assumptions regarding modulation schemes, which may affect the clarity of the relationship being explored.

aswathymohan
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Does anyone have any idea about modulation ratio of voltage and modulation frequency in power systems?What is the relation between between two?
 
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You need to be more specific. AM? FM? Are you referring to % of modulation in AM? Modulation index in FM? Incidentally, there are a lot of other modulation schemes that are based on and similar to AM and FM. Referring to one of these?
 
It is related to Amplitude Modulation
 
Then there is no relationship between the two. 100% modulation at a modulating frequency of 100 Hz is the same as 100% modulation at 1000 Hz. All it does is move the sidebands from 100 Hz away from the carrier to 1000 Hz away from the carrier. Changing the modulating frequency will not change the percentage of modulation.
 
Is the question about an inverter feeding an AC electrical motor?
 

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