Product Description:

The SC104-036-T3 is a closed-loop drive controller manufactured by Pacific Scientific for the SC100 Brushless Servo Controllers series. The device converts three-phase line power into a regulated DC bus and pulse-width-modulated output that positions brushless servomotors in conveyors, indexers, or pick-and-place axes. Within an automation cell, it links motion commands from a host or PLC to real motor torque while coordinating velocity and position through feedback processing and protective logic.

At the DC link, the controller maintains a nominal bus of 320 VDC, giving the switching stage adequate headroom for producing sinusoidal phase currents. During continuous operation, it can deliver up to 20 A of stall current, corresponding to a sustained mechanical output of 6 kW when paired with a matched motor. Power losses are limited, and the unit dissipates only 130 W at full load thanks to an efficiency of more than 95%. Internally, insulated-gate transistors commutate at a carrier frequency of 5 kHz, balancing acoustic noise and current ripple. The front end accepts 230 VAC line voltage with a +10 / −15% tolerance, three input phases, and source frequencies from 47 to 63 Hz, allowing installation on common factory mains.

For short bursts, the drive supplies 60 A of phase current for five seconds, producing as much as 17 kW of peak mechanical power to accelerate high-inertia loads. Excess regenerative energy is handled by an onboard shunt regulator that absorbs a continuous 30 W and can tolerate 15 kW for 300 ms, safeguarding the DC link during rapid deceleration. Closed-loop speed control is achieved through a Tachsyn Processor interface that interprets the 2.0 V/kRPM tachometer gradient without additional signal conditioning. Full ratings are maintained at operating temperatures from 0 °C to 50 °C, and electronic components remain stable when stored from −55 °C to 70 °C, supporting equipment shipping and warehouse staging.