Product Description:

The PC833-107-N is a brushless servo drive from Pacific Scientific in the PC800-PCE800 Brushless Servo Drives series. It regulates current and velocity loops for permanent-magnet servomotors used in positioning tables, pick-and-place gantries, and general motion axes. By converting machine-level commands into precisely timed phase currents, the unit serves as the actuator interface within multi-axis industrial automation cells.

The drive sustains a continuous phase output of 3.6 A RMS, which is the amount of current it can deliver continuously without overheating. Current, velocity, and position loops are refreshed every 62.5 microseconds, and this short update period helps reduce following error during rapid transients. Servo bandwidth reaches 1.5 kHz, allowing tight gain settings when mechanical compliance is low. Motor windings up to 2 H of inductance can be driven directly, so high-impedance coils do not require external filters. For stepper-emulation tasks, the command interpreter accepts pulse streams up to 800 kHz, allowing fine resolution on high-speed linear stages. The RS-232/485 port, ±10 V analog input, and native index tables provide alternative command paths when step/direction control is not used.

Minimum supported motor inductance is 2.0 mH, which helps keep current ripple within the loop tolerance when low-reactance servomotors are selected. Rotor excitation may reach electrical frequencies of 400 Hz, while the output ripple is centered on 20 kHz to move switching noise beyond the audible range. During acceleration bursts, the inverter supplies up to 15 A peak output, with an RMS peak of 10.6 A for 1-second events. When loop tuning cannot use maximum bandwidth, the recommended 1.0 kHz ceiling helps maintain phase margin. Command interfaces remain available during these operating conditions.

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