47075601 Pacific Scientific
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The Pacific Scientific 47075601 servo drive is part of the SC900 Servo Drives series. It provides a continuous output current of 30.0 Amps and a continuous output power of 9.0 kilowatts at 240V, with a peak output current of 60.0 Amps. This drive offers a power stage efficiency of 97% and supports a maximum motor inductance of 0.5 Henry.
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Product Description:
The 47075601 servo drive belongs to the SC900 Servo Drives series produced by Pacific Scientific. This standalone power module converts fixed-frequency, three-phase mains power into a controlled pulse-width-modulated output for brushless servo motors. By closing current and velocity loops internally, the drive enables precise speed regulation and rapid positioning in material-handling stations, indexing tables, and vision-guided robots. The unit is intended for panel installation with forced-air cooling, allowing machine builders to integrate high-power motion axes while maintaining a compact cabinet footprint. Its independent power stage supplies regulated motor current in response to motion commands from the connected control system.
With forced airflow at an ambient temperature of 50 °C, the drive can supply a continuous phase current of 30.0 A. This current is the steady-state thermal limit of the insulated-gate bipolar transistor bridge and bus capacitors under the stated operating conditions. For short acceleration periods, the controller delivers a zero-to-peak current of 60.0 A, giving the motor additional torque to overcome static inertia without placing a continuous load on the power stage. When energized from a 240 V three-phase source, the drive provides a continuous output of 9.0 kW. Transient moves can draw up to 18.0 kW from the DC link before current foldback activates. These current and power levels support demanding motion profiles that combine sustained operation with brief periods of rapid acceleration.
The power electronics operate at an efficiency of 97%, so a relatively small portion of the input energy is converted into heat instead of useful output power. This high efficiency reduces the ventilation load inside the enclosure while the required airflow carries heat away from the power components. Motor compatibility depends partly on line-to-line inductance, and the drive supports values as low as 0.5 mH without producing excessive current ripple. It also supports line-to-line inductance values as high as 0.5 H before available voltage becomes insufficient during high-speed commutation. This inductance range allows the controller to operate with motors that have substantially different armature characteristics. Correct motor data and current settings remain necessary to keep the connected axis within the drive’s electrical and thermal limits.
