The SIMOTRAS HD AC power controller is used for the open and closed-loop control of three-phase slip-ring rotor motors for cranes and hoisting gear.

SIMOTRAS HD is a fully-controlled digital, 3-phase thyristor controller in a compact design with stator phase control and electronic field reversal with ratings of between 20 and 580 kW for the open and closed-loop control of slip-ring rotor motors for cranes and hoisting gear.

All converters are equipped with a basic PMU operator panel in the door of the unit. The PMU can be used to perform all the adaptations, settings and measured value displays required for commissioning. The basic unit can also be operated via its serial service interface using a commercially available PC and suitable software. All device settings (e.g. controller parameters, limits, etc.) are stored in the device in a non-volatile memory.