45982901 Pacific Scientific
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The Pacific Scientific 45982901 is part of the SC900 Servo Drives series and provides a continuous output current of 3.75 Amps at 25°C convection. It delivers a continuous output power of 1.1 kW at 240V three-phase and has a power stage efficiency of 95 percent. The drive also supports a peak output current of 7.5 Amps and peak output power of 2.2 kW at 240 VAC.
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Product Description:
The 45982901 servo drive is manufactured by Pacific Scientific and belongs to the SC900 Servo Drives series. It is a three-phase PWM amplifier used in industrial automation to convert fixed mains voltage into controlled sinusoidal current for brushless servo motors. When integrated into a motion control loop, the unit regulates motor torque and speed in response to commands from the machine controller. This control supports precise positioning and repeatable velocity profiles in packaging machines, gantry axes, and electronic cam systems.
With natural convection at 25 °C, the drive delivers a continuous phase output of 3.75 A, supporting medium-frame servomotors without external cooling. At the same thermal point, it sustains 1.1 kW of continuous mechanical power. Motor inductance compatibility ranges from 4.0 mH to 4 H line-to-line, allowing the amplifier to operate with low- or high-impedance windings while maintaining current-loop stability. For short dynamic bursts, the power stage supplies a peak current of 7.5 A to handle acceleration and sudden load changes. Conversion efficiency reaches 95%, limiting the amount of incoming energy dissipated as heat inside the cabinet and reducing the cooling demand around the drive.
During rapid indexing, the drive can supply 2.2 kW at 240 VAC for short intervals, providing additional output for acceleration phases. The control algorithm compensates for energy stored in high-inductance motor windings, helping current settle without excessive torque ripple. Sinusoidal current regulation also supports smooth motor operation when an axis changes speed or reverses direction. Pluggable terminal strips keep field wiring organized and provide direct access to the drive connections when the enclosure is opened for service. Serial diagnostics report bus voltage, operating temperature, and recorded faults, giving the control system access to important operating data without requiring separate measurement circuits.
