DC Motors

Question 1

What’s the electrical input and output of a electrical DC Motor?

Answer 1

Electrical input, mechanical output

Question 2

which type of DC motor has a particularly good starting torque?

Answer 2

Series Motor

Question 3

2 applications of shunt motors

Answer 3

windscreen wipers and fuel pumps

Question 4

Which type of DC motor has a low variation in speed from no load to full load?

Answer 4

Shunt motor and differential compound motor

Question 5

2 applications for series motors?

Answer 5

Starter Motor and a crane

Question 6

2 ways a DC motor can be reversed

Answer 6

Change the field polarity or change the field current direction

Question 7

Whats the function of a commutator in a DC Motor

Answer 7

Acts as a rotating switch causing the armature current to reverse at the correct point and maintain the correct torque

Question 8

2 ways in which the speed of a DC motor can be decreased?

Answer 8

Increase field current or decrease armature current

Question 9

2 ways the speed of a DC motor can be decreased

Answer 9

Armature current control
Field current control