What type of current do interpoles carry in generator systems?

In generator systems, interpoles are specifically designed to improve the performance of the machine by providing additional magnetic fields that help in commutation. They are positioned between the main poles and are connected in such a way that they carry a portion of the armature current.

The armature current is the total current produced by the generator that flows through the armature winding. When the generator is operating under load, this current is critical to maintaining the appropriate magnetic field interactions and minimizing sparking at the brushes, which is essential for efficient operation and longevity of the electrical machinery. Interpoles are energized with this armature current, allowing them to dynamically adjust their magnetic field strength to counteract effects that could lead to poor commutation, such as changes in load or speed.

In contrast to the other currents listed, field current refers to the current flowing through the main field windings, load current pertains to the current consumed by the connected load, and excitation current specifically relates to the current supplied to create the magnetic field in the generator. None of these currents directly define what interpoles carry during operation, as interpoles are reliant on the armature current to fulfill their purpose.