Electrical Engineers and Master Electricians (EEAME) Portal
Home
Dictionary
Tutorials
General
Specifications
Forums
Disclaimer
Devices
Dictionary of Electrical Engineering
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
ALL
Commonly used terms in the Electrical industry.
overexcited
the condition where the field winding current is greater than a rated value that produces the rated MMF in the armature. With a synchronous or a DC machine, the excitation current is a direct current in the field windings.
If a machine is overexcited, the excess MMF must be counterbalanced in the armature. In the case of a DC motor, the overexcitation is counterbalanced by the increase of armature current, which is translated by the increase of both torque and speed. In the case of synchronous motor, a leading component of the armature current is present and the machine operates at a leading power factor.