Product Description:

The SC933-001-01 servo drive is produced by Pacific Scientific as part of the SC900 Servo Drives series. It is a power-conversion module that conditions three-phase 240 V input and sends regulated current to a matched servo motor. In an automation cell, the drive interprets motion commands from the controller and produces the required torque or velocity on the motor shaft. Because it includes regulation logic and power switching in one enclosure, the unit reduces cabinet space and simplifies wiring.

Under natural convection at 25 °C, the drive can deliver a continuous armature current of 7.5 A. This is the maximum steady-state load the connected motor can handle without overheating. The same cooling condition supports a continuous mechanical output of 2.2 kW when a 240 V three-phase supply is available. The IGBT bridge reaches a power-stage efficiency of 96%, so only a small fraction of energy is lost as heat. Control flexibility is provided through a command interface that accepts analog, incremental digital, or serial command signals, letting the drive integrate with legacy and modern motion controllers. To protect the power devices, the servo section expects the motor inductance to be no lower than 2.0 mH, which prevents excessive current ripple during PWM switching.

For short transients such as rapid acceleration, the drive can supply a peak output current of 15.0 A, doubling the continuous level for limited durations. When this current is delivered at full bus voltage, the result is a peak mechanical power of 4.5 kW, adequate for inertia-loaded starts or sudden load spikes. The allowable motor inductance extends up to 2 H; values beyond that range slow the current-loop response and reduce bandwidth. Operational feedback and parameter storage move across the integrated RS-232/485 serial link, so the drive can communicate through standard terminal software.