Exam 16: Dc Generators

When magnetism is used to produce electricity, it makes no difference whether the conductor moves through the field or the magnetic field moves across the conductor.

Armature core disks are commonly called ____.

In a(n) ____ generator, the magnetization current for the field coils is supplied from a source outside of the generator. This supply may be another DC generator, batteries, or a rectifier.

The current decreases as the armature coils of a generator move through the ____ plane. Theoretically, the current drops to zero.

Two basic types of windings are in general use for DC generator armatures: the lap winding and the parallel winding.

A generator's coils produce the most voltage when they move parallel to the magnetic lines of force.

A generator that maintains a nearly constant output voltage from no load to full load has excellent ____.

In the past, ____ generators were used extensively for series arc lighting, particularly for street lighting.

The stationary part of the generator is called the rotor.

____ windings eliminate armature reaction.

A commutator is a type of rotating switch that changes the connections to the load circuit at the same instant as the emf reverses in the armature.

To prevent the possibility of unwanted load shifting when connecting compound generators in parallel, connect the series field of each machine to a common ____.

____ connect the commutator to the load conductors.

A(n) ____ generator is a type of self-excited generator in which the field and armature are connected in parallel.

A(n) ____ winding is used to obtain high current capacity.