45983001 Pacific Scientific
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The Pacific Scientific 45983001 is a servo drive featured in the SC900 Servo Drives series. It offers a continuous output current of 7.5 Amps at 25°C convection and a continuous output power of 2.2 kW at 240V three-phase. The drive delivers a peak output current of 15 Amps and operates with a power stage efficiency of 96%.
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Product Description:
The 45983001 servo drive is a stand-alone power module developed by Pacific Scientific for the SC900 Servo Drives series. As a digital amplifier, it converts three-phase mains power into controlled current for brushless servomotors, allowing automated machinery to regulate position, speed, and torque with precision. The unit is intended for cabinet installation in motion axes that require midrange power and passive heat dissipation.
Under natural convection at 25 °C, the drive provides a continuous phase output of 7.5 A while maintaining acceptable internal semiconductor temperatures. The module operates from a 240 V three-phase supply and sustains a continuous mechanical output of 2.2 kW for routine production cycles. During rapid indexing or acceleration, its peak current capability rises to 15.0 A, temporarily increasing the available motor torque without activating overcurrent protection. This difference between continuous and peak current allows the power stage to support brief dynamic loads while remaining within its thermal operating limits. Cabinet airflow should leave enough clearance around the housing for naturally rising warm air to escape without obstruction.
The power stage is optimized for servomotors with a line-to-line inductance of 2.0 mH, supporting stable current regulation and accurate electronic commutation. Using a motor with unsuitable inductance can alter the current rate of change, reduce loop stability, and increase electrical stress on the switching components. During high-demand moves, the drive can deliver up to 4.5 kW before thermal foldback reduces the available output. The drive operates with a conversion efficiency of 96%, so a relatively small portion of the incoming electrical power is dissipated as heat. Proper motor matching and unobstructed cabinet ventilation help the drive maintain current-loop performance during repeated acceleration, deceleration, and positioning cycles.
