302
Alternative Fuels for Transportation
Armature
Armature
Input
voltage
Input
voltage
Series
field
Series
field
Shunt
field
long
Shunt
field
short
Figure 10.6
DC compound motor.
S h u n t
S e r i e s
C o m p o u n d
120
100
80
60
40
20
0 0
100
200
300
Percentage of rated speed
400
Percentage of rated torque
Figure 10.7
Typical speed and torque characteristics of DC motors.