Dear All,

My application is involved with SIMOREG DC MASTER used as excitation current controller of a SYNC. Motor application with C7 634 as PLC. Earlier the motor was running with a power factor of 0.92 and since 1 month the pfdropped down to 0.85 at a constant excitation current of 7.5 A max.
What could be the reason. How to increase the pf. What is the formula between excitation current and power factor? Is it related to ageing of excitation coil or any other parameters influence.

Thanks in advance
Vijay

Dear All,

Can anybody send the relation between excitation ct and pf.

Regards,
Naga