Reversing DC Motors
DC Motor Construction
Operating Principles
100

A DC motor can be reversed by changing the _____ of either the armature winding or the field winding?

What is polarity?

100

The rotating part of a DC motor consisting of the laminated core with slots for the coils, the main shaft, and the commutator and brushes.

What is an Armature?

100

A voltage induced in the windings that is opposite in polarity to that of the power supply.

What is countervoltage/Counter EMF (CEMF) ?

200

the Reverse braking process is often referred to as ________?

What is Plugging?

200

A ring made of insulated segments that keep the armature windings in the correct polarity to interact with the main fields.

What is a commutator?

200

A permanent magnet motor uses permanent magnets instead of ?

What are Field Windings?

300

DC motors and DC ________ are very similar to each other and in certain situations may be interchanged.

What is Generators?

300

A _____ is an extended, flexible connection or a braided copper conductor.

What is a Pigtail?

300

A series motor has the field windings in series with the _______ windings.

What is Armature?

400

A permanent magnet DC motor can be reversed by changing the polarity of the source _______?

What is Power?

400

The stationary part of a DC motor is called ?

What is the Field Frame?

400

An Armature includes a ___________ and brushes to switch DC current as the armature rotates through the field.

What is a Commutator?

500

Name the 2 electrical braking methods that utilize resistors in their braking process.

What are Regenerative and Dynamic braking?

500

Which DC Motor classification has a series field and a shunt field?

What is Compound?

500

_________ is the line through the armature cross section that is perpendicular to the maximum amount of magnetic flux.

Neutral plane

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