QUESTIONS 1. What are the four basic parts of motors? 2. What are the five types

Question

QUESTIONS 1. What are the four basic parts of motors? 2. What are the five types of DC motors? 3. Which of the following motors will most likely have the lowest starting torque? a) Series Motor b) Shunt Motor c) Compound Motor 4. Which of the following motors will most likely have a non-constant speed? a) Series Motor b) Shunt Motor c) Compound Motor PROBLEM A Series DC motor generates a back-emf (Eo) of 50 V. The armature resistance (R.) and the field resistance (R) is 2 , and 0.5 respectively. If the voltage across the amatur is 10 V: a) determine the armature current (Ia), field current (1) and the line current (I) b) What is the value of the voltage across the field resistance (R)? c) Compute the terminal voltage (V). d) Draw the equivalent circuit of the series motor. Label all values on it with your calculated values.

Explanation / Answer

1) four basic parts of a motor are

a) stator

b) rotor

c) bearings

d) conduit box

2) five types of DC motor are

a) Permanent magnet motor

b) series motor

c) shunt motor

d) compond motor

3) motor having lowest starting torque is

b) shunt motor

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