Product Description:

The PC833-001-N-BA is a brushless servo drive produced by Pacific Scientific within the PC800-PCE800 Brushless Servo Drives series. It regulates three-phase 240 VAC motors by converting the mains input to a controlled DC bus and modulating the resulting energy through an IGBT power stage. In automated cells, it supplies both speed and position control, allowing coordinated motion between multiple axes while maintaining compact panel depth. The design supports cabinet-mounted motion systems where several drives must fit into limited enclosure space without sacrificing responsive axis control.

The internal rectifier develops a bus voltage of 320 VDC, establishing the reference for current-mode control. Under continuous loading, the inverter delivers 3.6 ARMS and supports a mechanical output of 1.5 kW, matching small to mid-frame servomotors. During rapid accelerations, it can surge to 10.6 ARMS and release up to 4.5 kW, so drive sizing can tolerate short duty peaks without thermal trip. Peak current of 15 A zero-to-peak is handled by the power stage, while the 6 A line current drawn from the supply stays within typical branch circuit limits. The bus capacitor and shunt network are rated to absorb 30 J of regenerated energy on each deceleration event, and a 6% regeneration duty cycle limits repeated loading of the braking circuit.

Operational efficiency reaches 98%, reducing cabinet heat rise and lowering the fan load on enclosures during sustained operation. Carrier switching occurs at 20 kHz, which pushes ripple beyond the audible range and minimizes torque pulsation on high-resolution feedback loops. Motor leads may extend to 50 m without reflection problems, provided the connected windings stay between 2.0 mH and 2 H of inductance. The shunt transistor dissipates 800 W continuously and can absorb bursts up to 12.8 kW when large inertial loads return energy.