Engineering V / F constant control of induction motor with inverter

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The discussion centers on the operation of induction motors controlled by inverters and the relationship between converter and inverter output voltages. Participants clarify that V~ and A~ represent AC voltage and current, respectively. The output voltage of a converter is typically higher than that of an inverter because the converter provides the DC supply voltage for the inverter, and the inverter's output cannot exceed its input supply. There is acknowledgment that with proper design, inverters can produce various output voltages, but the supply voltage must remain greater than the inverter's output. The conversation emphasizes the importance of understanding these voltage relationships in the context of motor control experiments.
MissP.25_5
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Hello. I have to do an experiment on this topic, but there are many things I don't know. First of all, can you tell me what do the symbols V~ and A~ mean?
 

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Can someone tell me why is the output voltage of the converter bigger than the output voltage of the inverter? The output voltage of the converter would be a DC voltage whereas the output voltage of the inverter would be an AC voltage.
 
MissP.25_5 said:
Hello. I have to do an experiment on this topic, but there are many things I don't know. First of all, can you tell me what do the symbols V~ and A~ mean?

AC volts and AC current.
 
MissP.25_5 said:
Can someone tell me why is the output voltage of the converter bigger than the output voltage of the inverter? The output voltage of the converter would be a DC voltage whereas the output voltage of the inverter would be an AC voltage.

Why shouldn't it be?
 
rude man said:
Why shouldn't it be?

Hmmm, I guess the reason is the output voltage of the converter is the supply voltage for the inverter and output voltage can never exceed the input voltage. But I am not sure if that's enough reason for that.
 
MissP.25_5 said:
output voltage can never exceed the input voltage. But I am not sure if that's enough reason for that.

?

You can get any output voltage > or < input voltage with the right design.

For example, I have an inverter sitting in my garage that converts 12 VDC from a car battery to 115V AC 60 Hz to drive my TV set etc. if there is a power outage in my house.
 
rude man said:
?

You can get any output voltage > or < input voltage with the right design.

For example, I have an inverter sitting in my garage that converts 12 VDC from a car battery to 115V AC 60 Hz to drive my TV set etc. if there is a power outage in my house.

But the supply voltage, which is the output voltage of the converter should be bigger than the output voltage of the inverter, right? That's my question and I am trying to find the reason for that. I just guess that it's because the output voltage can't exceed the voltage supply. I said input earlier, I meant to say supply.
 

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