Day 13 DC Generator/Motor

The amount of torque developed in a coil depends on what three things in a dc motor:

• voltage, resistance, weight of the coil
• position of coil in the magnetic field, number of turns, strength of the magnetic field

• diameter of the coil, length of the wire, color of the insulation
• friction, temperature, humidity

The major parts of the DC motor include:

• stator, rotor, brushes, axle, field magnet, AC power supply
• armature assembly, field assembly, brush assembly, end frames

• armature, slip rings, brushes, axle, field magnet, DC power supply
• armature, commutator, brushes, axle, field magnet, AC power supply

Tags

NGSS.HS-PS3-3

This part of DC motor consists of several segments insulated from each other and the armature shaft by pieces of mica:

• brushes
• field windings
• armature core
• commutator

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

This ____ consist of the field frame, a set of pole pieces, and field coils:

• commutator
• field assembly

• armature
• rotor

The ___ assembly consists of brushes and their holders:

• battery
• brush

• circuit
• gear

What are the two most common brushes used in DC motors:

• aluminum and carbon

• tube type and box type

• primary and secondary

When a new brush is installed in a generator use this specification of sand paper:

• No. 000

• No. 124

• No. 434

• 12%

The ___ is the part of the motor that the armature assembly rotates in.

• shaft
• gear
• end frame

• coil

Tags

NGSS.MS-ETS1-1

True or False: In some DC generators, an interpole is placed between the main poles of

                                    the generator in order to reduce magnet field distortion

• True
• False

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

Types of DC motors include: Series, ___, and Compound

• Shunt
• Universal
• Induction