Product Description:

Pacific Scientific designs the PC834-001-T as part of its PC800 – PCE800 Brushless Servo Drives series. This drive is a power stage intended to regulate brushless servo motors in automated machinery, where it modulates current and voltage so the motor follows motion commands without position error. By saturating the motor windings with controlled three-phase output, the unit lets system builders obtain rapid acceleration and precise velocity control in packaging lines, pick-and-place axes, and material-handling equipment.

The drive supplies a continuous phase current of 7.1 ARMS, allowing motors to hold rated torque without thermal overload, while its continuous mechanical output reaches 3.0 kW for steady-state duty. For dynamic moves it can furnish a peak winding current of 30 A (0-pk) and deliver up to 9.0 kW of instantaneous shaft power, supporting short high-torque bursts during acceleration or impact loading. The power stage operates at 98% conversion efficiency, so only a small fraction of input energy is lost as heat, easing panel cooling requirements. Internal capacitors are switched by a PWM bridge running at 16 kHz, a ripple frequency high enough to minimize audible noise and motor torque ripple.

Cabling between the drive and motor can extend to 50 m, giving designers freedom in machine layout while staying within the specified motor inductance window of 1 H maximum and 1.25 mH minimum. The shunt regulator dissipates regenerated energy at 800 W continuously and up to 12.8 kW on transients, coordinated with a 6 % duty cycle and a 40 J absorption limit to protect the DC bus. Forced-air cooling raises permissible current to 10.6 ARMS, and the supply draws an rms line current of 12 A under rated output. The complete module weighs only 2.6 kg, simplifying mounting on vertical DIN rails or within moving control enclosures.