Generator field winding inductance
Generator field winding inductance
(OP)
Hi,
What are typical inductance & resistance values of generator field windings? Do these values change during operation?
What are typical inductance & resistance values of generator field windings? Do these values change during operation?






RE: Generator field winding inductance
But there are some standard assumptions you can use.
First. The resistance can be calculated from excitation voltage and excitation current. Let's say 300 V and 600 A for a synchronous motor. That means that the resistance is 500 milliohms.
Second. Typical time constants are in the 1 - 3 seconds range. Sometimes more. Since time constant is L/R, you can calculate L from T*R. If the time constant is 3 seconds, you get L = 3*0.5 = 1.5 henry in the example above.
Resistance changes with temperature - the change is around 0.4 percent/degree C. The inductance does not change with temperature - at least not so much that you need to take it into account.
Gunnar Englund
www.gke.org
RE: Generator field winding inductance