How we can improve the power factor of an induction motor?
The power factor of the induction motor can be improved by increasing the loading on the motor. If the higher rating motor is lightly loaded, it must be replaced with a lower rating motor. This way the motor losses can be reduced.
Should power factor be raised to 1 give reasons?
A high power factor reduces the load on transformers and distribution equipment. A high power factor decreases the I2R losses in transformers, distribution cable, and other equipment, resulting in a direct saving of kilowatt-hour power consumption. A high power factor helps stabilize the system voltage.
Why power factor is improved when induction motor runs under loaded condition compare to no loaded condition?
The power factor of the motor gets improved with increased loading on the motor. With increased loading, the impedance of the rotor circuit gets decreased and the rotor draws less reactive current and thus the power factor of the motor improves.
How do we improve power factor?
What can I do to improve power factor? You can improve power factor by adding power factor correction capacitors to your plant distribution system. When apparent power (kVA) is greater than working power (kW), the utility must supply the excess reactive current plus the working current .
Why is the power factor of an induction motor low?
As the stator windings of induction motor takes lagging current 90° out of phase with Voltage, therefore the power factor of induction motor is low. If the exciting ampere-turns are excited by external AC source, then there would be no effect of exciting current on stator windings.
How is phase Advancer used to improve power factor?
Phase advancer is used to improve the power factor of induction motor in industries. As the stator windings of induction motor takes lagging current 90° out of phase with Voltage, therefore the power factor of induction motor is low.
What happens to the current after a power factor improvement?
Also note that after the power factor improvement, the circuit current would be less than from the low power factor circuit current. Also, before and after the power factor improvement, the active component of current would be same in that circuit because capacitor eliminates only the re-active component of current.
How does a synchronous motor improve the power factor?
Whenever a Synchronous motor is over-exited then it provides leading current and works like a capacitor. When a synchronous condenser is connected across supply voltage (in parallel) then it draws leading current and partially eliminates the re-active component and this way, power factor is improved.