DC Generator

_______________ is the twisting or bending of the magnetic lines of flux of the pole pieces.

Armature reaction

_______________ is a measure of the useful electric energy produced by the generator.

Countertorque

What is a device that converts mechanical energy into DC electrical energy?

a generator

The rotating part of a generator is called the _____.

armature

The _____ ride against the commutator segments and are used to connect the armature to the external circuit of the DC machine.

brushes

What is the component of a DC generator that converts the armature AC into DC?

commutator

A generator containing both series and shunt fields is called a _____ generator.

compound

The relationship of the strengths of the two fields in a generator determines the amount of _____.

compounding

A compound generator has both series and shunt field windings. When those windings are connected so they aid each other in the production of magnetism, that connection is called _____.

cumulative-compound

A compound generator has both series and shunt field windings. When those windings are connected so their fields oppose each other in the production of magnetism, that connection is called _____.

differential-compound

Series field windings are connected in series with the armature. They are wound with _____ turns of fairly _____ wire.

few; large

The output voltage of a generator is usually controlled by the amount of _____.

field excitation current

Armatures are wound to provide high voltage, high current or some specific combination of voltage and current. Which type of winding provides moderate voltage and moderate current?

frogleg-wound

Armatures are wound to provide high voltage, high current, or some specific combination of voltage and current. Which type of winding provides low voltage and high current?

lap-wound

Shunt field windings are connected in parallel with the armature. They are wound with _____ turns of fairly _____ wire.

many; small

Shunt generators contain only a shunt field winding connected in _____ with the armature.

parallel

What provide(s) the magnetic field necessary for the operation of a DC machine?

pole pieces

The series generator has only a series field, which is connected in _____ with the armature.

series

In a generator, the _____ permits part of the current that normally flows through the series field to flow through the resistor.

series field shunt rheostat

Armatures are wound to provide high voltage, high current, or some specific combination of voltage and current. Which type of winding provides high voltage and low current?

wave-wound