Variable and Constant Torque Soft Starts
Starting up an electrical motor and ramping it up to speed requires a lot of energy. But too much energy at startup can lead to motor burnout. That’s why electrical motors need a soft starter or a variable frequency drive (VFD) to prevent motor burnout. In short, variable and constant torque soft starts models both can start up AC motors without causing motor burnout. A soft starter is a solid-state device that protects AC motors from sudden surges of power by limiting electrical current and torque at startup, and are used in compressors, conveyors, and mixers. While a soft starter is only active at motor startup, a VFD adjusts motor speed throughout the run cycle, until the motor is shut off. A VFD drive varies the frequency and voltage supplied to a motor at startup, and are used in fans, blowers, and centrifugal pumps. Typically, the higher the frequency, the faster the motor goes, producing greater torque. The VFD will adjust the frequency to prevent the motor from producing more torque than the motor can safely handle. We have many VFD models from top-brands, such as Schneider Electric, Fuji Electric and Eaton. Zoro also has bypass soft starts, HMI control soft starts, dial control soft starts, and soft start acccessories to help your machine motors go to the max.