DC motors Flashcards
DC motors have
A) excellent start torque
B) poor start torque
A) excellent start torque
A DC motor has
A) excellent run torque
B) poor run torque
A) excellent run torque
Is a DC motor capable of speed control
Yes. Has excellent speed control and regulation
Is a DC motor self starting
Yes
In a DC motor power is supplied to what
To the armature through the brushes and commutator
The three types of DC motor are
Series, shunt, compound (series/shunt)
A series coil is made of
Few turns of large wire, low resistance
The series coil terminals are marked
S1(+) and S2(-)
The shunt coil is made of
Many coils of small wire, high resistance
The shunt terminals are marked
F1(+) and F2(-)
The armature terminals are marked
A1(+) and A2(-)
In a long shunt the shunt field is connected in parallel with
Both the armature and series field winding
In a short shunt the shunt field is connected in parallel with
The armature
How do you correct armature reaction
Add interpoles and commutating windings in series with armature current
How do you break a DC motor
Dynamic braking
