What is the purpose of a starter in motor control?

The primary function of a starter in motor control is to limit the starting current when an electric motor is energized. When a motor starts, it can draw a significant amount of inrush current, often several times higher than its normal running current, which can lead to various issues such as overheating, mechanical stress, and damage to equipment.

By incorporating a starter, the electrical and mechanical systems are protected from these high inrush currents. Starters can gradually apply power to the motor, allowing it to accelerate smoothly to its operating speed. This soft-start capability not only protects the motor but also reduces the stress on connected equipment and the electrical supply system.

While the other options mention various benefits related to motor operation, they do not specifically address the critical function of current limitation at startup, which is the essential role of a starter. For instance, increasing voltage or improving energy efficiency do not directly pertain to how starters function, and while reducing motor wear may be a consequence of smoother starts, it is not the fundamental purpose of a starter.