PC834-116-N Pacific Scientific
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The Pacific Scientific PC834-116-N is part of the PC800 - PCE800 Brushless Servo Drives series and delivers a continuous output current of 7.1 ARMS with a peak output current of 21.2 ARMS. It features a continuous power rating of 3.0 kW at 240V 3-phase, with peak output power reaching 9.0 kW and a power stage efficiency of 98%. The drive supports a maximum motor cable length of 50 meters and a max external regen duty of 6%.
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Product Description:
The PC834-116-N is a brushless servo drive manufactured by Pacific Scientific for the PC800–PCE800 Brushless Servo Drives series. It conditions three-phase line power, maintains an internal DC bus, and modulates current through a high-frequency inverter so that a matched servomotor can follow velocity or position commands with minimal error. By combining power conversion, protection logic, and diagnostic ports in one package, it simplifies cabinet layouts for automated packaging lines, material-handling axes, and light machine-tool spindles that depend on tight dynamic response.
The drive maintains a DC-link voltage of 320 VDC when supplied from a 240 V three-phase source. Under continuous operating conditions, it can deliver 7.1 A RMS to the motor, corresponding to a sustained mechanical output of 3.0 kW. For rapid acceleration or disturbance rejection, it supplies up to 21.2 A RMS and supports a transient mechanical demand of 9.0 kW. The power stage operates at 98% efficiency, keeping heat generation modest and easing panel thermal management. A bus energy absorption capacity of 40 J protects the link capacitors from moderate regenerative surges. The drive accepts motor inductances from 1.25 mH to 1 H, allowing it to operate with a broad range of compatible Pacific Scientific motors. Inrush current is limited to a peak of 300 A for a 2 ms pulse, reducing stress on upstream circuit protection.
The internal shunt dissipates continuous regenerative power of up to 800 W and tolerates peaks of 12.8 kW, provided the external regeneration duty remains below 6%. Excess braking energy is switched at an output ripple carrier frequency of 16 kHz, placing the electrical corner frequency above most servo bandwidths and minimizing audible noise. A maximum motor-cable length of 50 m supports installations where the motor is positioned away from the drive. The controller also monitors the motor cable for fault currents, helping protect the power stage and connected motor during operation.
