Electric Motor

2,100 RPM

www.kylesconverter.com ›

60 rpm per hz....

( True only for a 2 pole motor).

Option 1: it's actually pretty meaningless without knowing the construction of the motor, particularly if it were series-wound or another asynchronous type...

It's a DC motor.

...then the question is irrelevant.

Yes. I think this was a homework problem.

Option 2: it's the sort of question that begs for capitalisation and punctuation to be correct.

Option 3: it's enough to turn a permanent magnet DC motor into a convection heater, once.

...so it's academic when the motor details have been withheld from the forum.

"The more comprehensive the line of questioning, the more useful will be the answers." _{- Anonymous Poster #0}

Is there a prize for getting the right answer?

Only if the OP/AP knows what they are asking.

Are you kidding?

For a synchronous motor,one formula is: FrequencyX120/number of poles. For a 2pole synchronous motor the speed would be 2100 RPM For a 4 pole motor,half of that,etc,etc. A higher frequency motor will generate more hp per pound than a lower frequency.This is one reason airports use 400 Hz. If Tesla had used a higher standard frequency,the "pole pig" transformers would be much smaller.

Do you mean "What is 35 cycles per second expressed as cycles per minute"?

Who knows...

Now unknown to yourself, the official answer to that question is: It is twice the distance from the center to one end.

It depends. If you're in the US, you're using 60 Hz, right. So that makes it 2100* sq root of sigma/delta cubed. Why delta cubed and not squared? Think about this for a second. When you're using rms vs DC, there's a factor that you need to always remember. Cubed not squared okay!

If you're in Europe, it's 50 Hz, but they have three phase power, so you have to multiply by sin 60 deg and get the concurrent angle by using cosec of the inverse, which is cosec 120 deg. Then you are not using rms, because they are using three phase. That's the trick part of this question. Use the cube root of delta.

That should clear up any questions you have.

Hi,

I think you need to provide a little more information:

1. Can you provide the rating plate information for the machine, please. What type of machine it is, what its normal operating supply voltage is &c;
2. Are you planning to operate it on a 35hz supply? through a variable speed drive?

Folks

Unless Anonymous Poster #1 gives us more info, Lyn's response is the only thing that can be said: 35cycles/ second is equivalent to 2100 revs/min. It is the same rotational velocity. The speed of light is the same whether you express it in meters per second or furlongs per fortnight.

what is the polarity of Motor?