Frequency variations and how loads are affected?
Frequency variations and how loads are affected?
(OP)
I would like to know what affect variations on utility frequency would have on loads.This could be for a variety of loads whether they be quadratic in nature, resistive or inductive motors? Could anybody help or at least point me in a direction to obtain information relating to this?






RE: Frequency variations and how loads are affected?
Motor load - I have to think about that one. Torque for constant freq is proportional to (V/f)^2 which shifts torque speed curve down. The torque speed curve will also shift to the right corresponding to increase in sync frequency. Speed will be determined by intersection of load Torque-speed curve with the new (higher freq) torque speed curve. Clear as mud right? Maybe someone else can analyse it a little further?
RE: Frequency variations and how loads are affected?
regards
James
RE: Frequency variations and how loads are affected?
Note this is not an absolute for every induction motor. The two effecrt described in my first message work in opposite directions (torque speed curve shifts towards higher speeds but lower torques). But for overall modeling of large number of motors it is correct.
RE: Frequency variations and how loads are affected?
An individual motor is not likely to be affected in a manner detrimental to the motor or its operation?
RE: Frequency variations and how loads are affected?
You're only talking about a 1% variation in frequency. Should not be a problem for induction motors.
Certain types of clocks might run slow though.