A hands-on look at how brush position reshapes a repulsion motor’s action
The book presents a focused study of a four‑pole repulsion motor and how moving the brushes changes the motor’s internal actions. It explains the interplay between generator and transformer effects as the brush position shifts, using a specially built brush shifter and detailed measurements.
Designed as a thesis, the work documents a practical experiment: a ten‑horse‑power, single‑phase series motor tested at 27‑cycle current. It describes the setup, the method, and the data collected from variations in brush position, current, voltage, and speed. The result is a clear look at how timing and currents produce torque and speed in this type of machine.
- What changes when the brushes move: transformer action, generator action, and the resulting torque and speed behavior.
- How a four-pole arrangement and brush width affect short‑circuiting and current flow in the armature.
- How speed responds to imposed voltage, brush position, and load, with practical test data and observations.
- Notes on practical testing, including a description of the test bench and measurement approach.
Ideal for readers of engineering and motor theory who want a concrete, data‑driven look at repulsion motor behavior and brush shifting.