How is armature reaction in a generator compensated?

Armature reaction in a generator is compensated by using interpole windings. This phenomenon occurs when the magnetic field produced by the armature current distorts the main magnetic field. Such distortion can lead to performance issues in the generator, including a reduction in voltage and efficiency.

Interpoles, or commutating poles, are specifically designed to counteract this effect. They are strategically placed between the main poles of the generator and are connected in series with the armature. The magnetic field generated by the interpoles assists in neutralizing the adverse effects of the armature reaction. This ensures that the commutation process is more effective, which leads to a smoother and more stable output voltage.

In contrast, options such as increasing the load or decreasing the field strength do not directly address the issue of armature reaction. Connecting more batteries pertains to increasing the overall voltage or capacity but does not influence the specific electromagnetic interactions occurring within the generator. Hence, the use of interpole windings stands out as the most effective method for compensating armature reaction.