G101A - Mag Part 8 & 9

Generators are devices that convert

_______ energy into _______ energy.

• chemical; mechanical

• mechanical; electrical

• electrical; mechanical

• potential; kinetic

Fleming's LEFT HAND rule applies for:

• Motors

• Generators

• Both

• Neither

Fleming's RIGHT HAND rule applies for:

• Motors

• Generators

• Both

• Neither

When applying Fleming's right hand rule:

Thumb - ?

Pointer Finger - ?

Middle Finger - ?

• Thumb - Motion

  Pointer Finger - Direction Of Current Flow

  Middle Finger - Direction Of Lines Of Force

• Thumb - Direction Of Current Flow

  Pointer Finger - Direction Of Lines Of Force

  Middle Finger - Motion

• Thumb - Motion

  Pointer Finger - Direction Of Lines Of Force

  Middle Finger - Direction Of Current

• Thumb - Direction Of Current Flow

  Pointer Finger - Motion

  Middle Finger - Direction Of Lines Of Force

One side of a motor coil produces a force of 1N when connected to the supply. If the distance from the motor shaft to the coil side is 500mm, how much torque would the entire coil produce?

 $T\ =\ Fr$  

What component is labelled 1?

• Stator

• Bearings

• Brushes

• Armature Winding

What component is labelled 2?

• Commutator

• Field Magnet

• End Shield

• Frame

What is the power output of this motor?

What is the current rating of this motor?

The part of a DC motor that usually requires the most maintenance is:

• the bearings

• the end shields

• the field system

• the commutator and brush gear