compound motors
series or shunt
DC motors
DC motors
random
100

compound motors have _____ field windings 

series and shunt 

100

Series motors must never be operated under

a no load condition 

100

What are the three basic types of DC motors 

Shunt, Series, Compound

100

when full voltage is applied to the armature and reduced current flows through the shunt field, the motor operates at 

overspeed 

100

The force that tends to cause rotation is known as

Torque 

200

Protective device that is connected in series with the shunt field, and found on most large compound motors 

Field loss relay 

200

A shunt motor is also knows as a

"constant speed motor"

200

A device that converts electrical input into mechanical output is called 

Motor

200

When reduced voltage is applied to the armature and full voltage is maintained to the shunt field, the motor operates at 

underspeed 

200
The amount of counter-electromotive force is proportional to 

The number of turns of wire in the armature, The strength of the magnetic field of the pole pieces, and the speed of the armature 

300

Compound motor connection that is rarely used 

differential 

300

A shunt motors has the shunt field connected in ______ with the armature 

parallel

300

The speed regulation of a DC motor is proportional to 

Resistance of the armature 

300

permanent magnet motors have ______ efficiency than wound motors 

Higher 

300

Because the rotor of a ServoDisc motor is made from copper laminated onto a fiberglass disc, the motor is also called a 

Printed circuit motor 

400

The cumulative compound motor connection means that the fields of the series and shunt field windings 

Add

400

A ______motor can develop extremely high starting torque 

shunt

400

A motor that does not contain a wound armature, commutator, or brushes is a 

Brushless motor 

400

When full voltage is applied to both the armature and the shunt field, the motor operates at

base speed 

400
Some DC servo motors have square wave input voltage. To vary the motor speed, the on and off time ratio of the square wave is varied. This is called 

Pulse-width modulation 

500

In a compound DC motor control circuit, the field loss relay will disconnect the _______ if power is lost to the ______

armature, shunt field 

500

In a series motor the speed is controlled by the 

amount of load connected 

500

What determines the amount of torque produced by a DC motor 

Strength of the magnetic field of the pole pieces, and Strength of the magnetic field of the armature

500

When a DC machine is used as a motor what function does the commutator perform 

Rotary switch 

500

Counter-electromotive force limits _______ through the armature when the motor is in operation 

the flow of current

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