Alternator Voltage Frequency Change

The 5KVA rating was given for the nominal speed of the alternator. Ideally, it should provide 5KVA at any frequency. As to the open circuit voltage at any any frequency, you would have to refer to the manufacturers documentation or determine it experimentally.

Easy homework problem that has been circulating around the web since 2009, last seen in Spanish 4 days before it appeared here.

Usually this array is, seldom, used to generate High voltage to test transformers isolations at high frequency, so to avoid iron over saturation.

We use the same array , but with a variable frequency controller . No problem as it is used for a short time and low current.

Our array is a 20 Kva brush less generator, and a 4 pole motor, we use 20 Kva , is due to is the smallest we can get.

Our standard frequency is 50Hz

We use it at 50 , 100 ,and up to 120 Hz.

You will get the 100Hz

Voltage: This is going to depend on the excitation circuit setting.

You probably want to know what should be the limit(!?) when you change the frequency. This is going to depend on the generator winding insulation and the allowed maximum current.