Synchronous motor excitation refers to the DC supply given to rotor which is used to produce the required magnetic flux. … The field current, which causes this unity power factor is called normal excitation or normal field current.
What is a excitation current?
1 : a current that excites or energizes an electrical apparatus (such as the field magnets of a dynamo) 2 : the current taken by the primary of a transformer on no load.
Why DC is used for excitation?
Why only D.C is used for Excitation in Alternators? Excitation voltage or current is supplied to the field windings of a rotor to produce a static magnetic field. If we use alternating current instead of direct current; we will get a fluctuating magnetic field.
What is magnetising current?
A certain amount of current is drawn by a transformer from the source connected to it primary even when no load is connected to its secondary. A part of this current is used to create flux in the transformer core. This current is known as magnetization current.
What power factor means?
Power factor (PF) is the ratio of working power, measured in kilowatts (kW), to apparent power, measured in kilovolt amperes (kVA). … The result is expressed as kVA units. PF expresses the ratio of true power used in a circuit to the apparent power delivered to the circuit.
What is excitation in psychology?
n. the electrical activity elicited in a neuron or muscle cell in response to an external stimulus, specifically the propagation of an action potential.