BCL-02820-A02 Kollmorgen
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The Kollmorgen BCL-02820-A02 is a servo motor drive from the Goldline Smart Drives series. It features a compensation voltage of 230 VAC and supports a continuous output current of 20 Amps. The drive uses baseplate heatsinking for cooling and operates in current loop only mode with a PWM frequency of 20 kHz.
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Product Description:
The BCL-02820-A02 is a servo motor drive manufactured by Kollmorgen for the Goldline Smart Drives series. Intended for assembly robots, pick-and-place heads, and similar motion axes, the unit converts fixed-frequency mains power into precisely regulated phase currents that drive brushless servo motors. It serves as the power amplifier within an automation cell, translating digital torque commands into motor coil currents while providing fault monitoring and thermal protection. This arrangement allows a higher-level motion controller to manage velocity and position while the drive handles the rapid electrical response required by the connected motor.
The power stage accepts a bus supply of 230 VAC, allowing operation from standard European or split-phase North American sources. Under continuous duty, the drive delivers 20 A of phase current and can maintain that current during brief acceleration profiles without derating. The control electronics operate in current-loop-only mode, meaning the internal digital signal processor regulates instantaneous motor current while higher-level velocity algorithms remain external. Pulse-width modulation operates at 20 kHz, helping reduce audible noise and motor ripple torque. The switching stage uses a Power FET bridge that limits conduction losses and supports rapid changes in motor current. These electrical characteristics support responsive torque control during repeated acceleration and deceleration cycles.
Heat generated by the switching stage is removed through baseplate heat sinking; mounting the chassis to a cooled panel keeps semiconductor junction temperatures within their permitted range. The output stage energizes a three-phase stator, providing the alternating phase currents required for brushless motor commutation. The logic section provides power for Hall devices used to report rotor position to the commutation circuit. Ancillary regulators furnish positive and negative 15 V rails at 10 mA each for external analog circuitry. The integrated 5 V bus can source up to 250 mA for commutation sensors, encoders, or small input and output modules. Supplying these low-voltage loads from the drive reduces the need for separate power wiring inside the control cabinet.
