Increasing the speed of an ac motor

[HWeber]

Hey. I was doing a question and it asked what would be the graph of an AC motor if the speed was doubled. (the previous period was 10 ms).

I think that the frequency would be doubled but would anything happen to the amplitude?

 

[Andrew Mason]

Hey. I was doing a question and it asked what would be the graph of an AC motor if the speed was doubled. (the previous period was 10 ms).

I think that the frequency would be doubled but would anything happen to the amplitude?

What do you mean by the "graph of an AC motor"? Do you mean the electrical power plotted as a function of speed? voltage vs speed? frequency vs. speed? speed vs frequency? etc...

AM

 

[thepatientmental]

Hi there! Great question. Doubling the speed of an AC motor would indeed result in a doubling of the frequency. However, the amplitude would not necessarily change. The amplitude of an AC motor's graph represents the strength or power of the motor, which is determined by the voltage and current. Unless the voltage or current is also increased, the amplitude would remain the same. However, the shape of the graph may change as the motor is operating at a higher speed, resulting in a shorter period of time for each cycle. Hope this helps!