Product Description:

The PC834-001-A is a brushless servo drive built by Pacific Scientific as part of the PC800-PCE800 Brushless Servo Drives series. It converts three-phase mains power into a regulated DC bus and a controlled PWM output for operating permanent-magnet servomotors used in industrial automation. By combining current, velocity, and position regulation in one module, the drive provides precise axis control for packaging machines, material-handling cells, and other coordinated-motion equipment.

When powered from a 240 VAC supply, the internal bus is held at 320 VDC, giving the power stage sufficient voltage headroom for rapid torque transients. The continuous mechanical output is rated at 3.0 kW and is delivered with a phase current of 7.1 ARMS. For acceleration or short overloads, the current regulator can supply up to 21.2 ARMS while maintaining stability. Current loop dynamics are assisted by a maximum bandwidth of 1.5 kHz, allowing the drive to correct load-induced disturbances quickly and maintain commanded torque. These electrical limits are protected by a 30 A, 250 V semiconductor fuse, and startup stresses are absorbed by an inrush limiter rated for 300 A over a 2.0 ms pulse.

The motion processor updates the position loop every 1 ms, while the velocity loop refreshes at 250 µs so that commanded profiles remain synchronized with encoder feedback. A power-stage efficiency of 98% minimizes panel heating and reduces the demand on cabinet ventilation. Resolver feedback is supported through an excitation frequency of 6510.42 Hz, matching the carrier requirements of standard Pacific Scientific motors. Physical integration is eased by the CA800 Basic Connector Kit, an overall width of 114 mm, and a transport weight of 2.6 kg. Average line draw during continuous 240 VAC operation is 12 A, which helps keep feeder sizing moderate for multi-axis systems.