A small imbalance in phase-to-phase voltage can result in?

A small imbalance in phase-to-phase voltage can lead to increased heat generated in motor windings. Electric motors are designed to operate under balanced voltage conditions. When there is a voltage imbalance, it can cause uneven current flow through the windings of the motor.

This uneven current can result in higher currents in certain phases, leading to Excessive heat due to increased power losses, primarily in the form of I²R losses, where I represents current and R represents resistance. Over time, this heat can lead to insulation damage, reduced lifespan of the motor, and potentially catastrophic failure if the imbalance is significant enough.

While reduced motor efficiency and decreased operating speed may be consequences of a malfunctioning motor, the direct relationship between voltage imbalance and overheating is the more immediate concern. Improved torque performance is generally not a result of voltage imbalance; in fact, an imbalance typically degrades torque capabilities due to the inconsistent magnetic fields created by the uneven currents.