Product Description:

The PC834-101-N is a brushless servo drive built by Pacific Scientific as part of the PC800-PCE800 Brushless Servo Drives series. It converts incoming three-phase power and high-resolution resolver feedback into precise current, velocity, and position commands, allowing coordinated motion of industrial robots, conveyors, and material-handling axes. By integrating a multi-protocol command interface and onboard regulation loops, the drive serves as the electrical link between a motion controller and a low-inductance servomotor in automated production cells.

During continuous operation, the power stage delivers 7.1 ARMS to the motor windings, while transient moves can draw up to 21.2 ARMS for rapid acceleration. Those currents are sourced from a three-phase input that accepts 180–265 Vac, 3-phase, and they are regulated by a current loop that switches at 16 kHz. Control electronics are powered separately through 85–265 Vac, 47–440 Hz or 130–370 Vdc inputs, allowing the logic to remain active during mains fluctuations. With a measured power-stage efficiency of 98%, heat generation is low, so the 198.1 × 114 × 158 mm housing can be panel mounted without forced airflow. A typical installation draws 12 A RMS from a 240 Vac supply, and position error stays within ±5.3 arc-min.

The velocity regulator is tuned for dynamic moves, and it supports a loop bandwidth of >400 Hz. Current commands propagate through the inner loop at 1.5 kHz max. High-precision feedback is provided by a resolver with 24 bits of native resolution, ensuring smooth interpolation between command updates. Combined with the indexing, step/direction, ±10 V analog, and RS-232/485 command options, the drive can be integrated with PLCs or stand-alone motion sequences. All capability is packaged in a frame that weighs only 2.6 kg, easing installation on machine panels without heavy support hardware.