Product Description:

The CR06502 is a servo drive released by Kollmorgen within the CD Servostar CD Drives series. Classified in the Compact Drive product family, the unit interfaces between a regulated DC bus and brushless servomotors in automated machinery. By gating insulated-gate transistors through pulse-width modulation, it delivers three-phase power while processing resolver feedback to keep velocity and position loops aligned with external motion commands. Its small footprint and integrated protections allow mounting close to the axis without dedicated cooling plenums, which helps in compact machine layouts where cabinet space is limited.

Internally, the CR06502 operates from a bus link of 325 VDC, and its power stage switches at a PWM carrier of 8 kHz. The resulting waveform shows a motor-side current ripple of 16 kHz, which helps reduce cogging at speeds handled by the 400 Hz maximum commutation rate. Closed-loop speed error is held within 0.01% when the resolver transducer, energized with 4.25 VAC and working through a 0.47 transformation ratio, returns position data. For quick torque demands, the amplifier allows a peak of 12 A for two seconds, yet it disconnects the output when the DC rail exceeds 430 VDC. Continuous service is supported at a rated current of 6 A, allowing the drive to handle sustained motor operation without relying on short overload intervals.

The drive dissipates 80 W of internal heat at full load, and control logic trips if the heat sink temperature reaches 80 °C. During very short transients, it can furnish 18 A for 500 milliseconds before reverting to its lower peak band. Undervoltage protection activates below 90 VDC to prevent control faults while supply power is recovering. Resolver tracking and the preset current ripple support stable commutation during changing load conditions. The aluminum housing weighs only 2.22 kg, which makes the unit easier to place on densely populated electrical panels.