What is another name given to solid-state, reduced-voltage starters because of their ability to provide a smoother, stepless start and acceleration?

Solid-state, reduced-voltage starters are commonly referred to as soft-start controllers due to their capability to initiate motor operation in a manner that allows for gradual acceleration. This gradual increase in voltage and current helps to minimize the inrush current typically seen with traditional direct-on-line starters, reducing mechanical stress on the motor and associated equipment during startup.

Soft-start controllers utilize electronic components to adjust and control the voltage supplied to the motor, which results in smoother acceleration and deceleration as compared to abrupt starting methods. This not only enhances the lifespan of the motor but also improves system performance and energy efficiency, reducing potential damage from sudden loads.

The other options, while related to motor control, do not specifically highlight the smooth acceleration feature of solid-state, reduced-voltage starters. Variable frequency drives focus on providing speed control over a range of frequencies, while static starters can refer to a broader category of starters without emphasizing the soft-start functionality. Speed controllers are more generic and can apply to various mechanisms of speed adjustment, but they do not specifically denote the unique benefits offered by soft-start technology.