Speed control of D.C Motors (Shunt type)
D.C shunt motor speed can be controlled by the following methods:
i. Flux control method.
ii. Armature control method.
iii. Voltage control method.
N a 1/F ; By decreasing flux, speed can be increased and vice – versa. The
flux of DC motor can be changed by changing the field current with the help
of shunt field rheostat.
N a (V-Ia Ra), The speed / armature current characteristics show that greater
the resistance in armature circuit , greater fall in speed.
Shunt field of motor is connected permanently to a fixed exciting voltage, but
armature is supplied with different voltages by connecting it across one of the
several different voltage by means of suitable switchgear.
gregorymasila answered the question on February 20, 2018 at 16:26
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