- #1
girts
- 186
- 22
Hi folks , a simple question, is it true that generators are like transformers in regard to the frequency of the AC being generated versus the size of the device for given amount of power transfer?
We know that transformers can have smaller cores with fewer turns if the frequency of the AC is increased, like in smps. Does the same logic applies to generators?
Let's take for example a hydro power plant generator mounted on top of a turbine, the rotor field current is DC so the rotor has given amount of magnetic pole pairs that travel past a fixed stator poles into which AC is induced whose frequency is proportional to the rpm of the rotor, now let's forget that we need to maintain the grid frequency, if we would say double or quadruple the rpm of the rotor, how would that affect the output power for size of the generator?
So essentially what I want to understand is the relationship between the physical size and the frequency in generators and does it relates to the same law in transformers?
We know that transformers can have smaller cores with fewer turns if the frequency of the AC is increased, like in smps. Does the same logic applies to generators?
Let's take for example a hydro power plant generator mounted on top of a turbine, the rotor field current is DC so the rotor has given amount of magnetic pole pairs that travel past a fixed stator poles into which AC is induced whose frequency is proportional to the rpm of the rotor, now let's forget that we need to maintain the grid frequency, if we would say double or quadruple the rpm of the rotor, how would that affect the output power for size of the generator?
So essentially what I want to understand is the relationship between the physical size and the frequency in generators and does it relates to the same law in transformers?