What is the displacement between the centers of adjacent poles in an armature commonly referred to as?

The displacement between the centers of adjacent poles in an armature is commonly referred to as "one pole pitch." This term is essential in the study of electrical machines because it defines the physical spacing between the magnetic poles of the machine. Understanding pole pitch is crucial when analyzing the design of motors and generators, as it affects the distribution of magnetic flux and the overall performance of the machine.

Pole pitch is important for determining how much of the armature coil contributes to generating voltage in the presence of a magnetic field. It influences factors like the induced voltage and the characteristics of the waveform produced in alternating current applications. By establishing the distance that covers the space for one complete electrical pole, the concept of pole pitch becomes foundational in electric machine theory.

The other options represent different concepts not directly related to the measurement of displacement between pole centers. For instance, an electrical cycle refers to one complete waveform of alternating current, while coil pitch pertains to the spacing between turns of a coil and half pole pitch is half the distance of one pole pitch, neither of which conveys the specific measurement of the space between adjacent poles. Thus, "one pole pitch" is the precise and correct terminology for this specific aspect of armature design.