Product Description:

The M.1302.8138 is a standalone smart drive produced by Kollmorgen for the MMC Standalone Smart Drives series. As a field-mounted servo amplifier, it supplies regulated three-phase power to synchronous or induction motors and accepts high-speed command signals from motion controllers. In automated cells, the unit manages acceleration, deceleration, and steady-state velocity without external regenerative hardware, allowing compact axes to be integrated into packaging, printing, or material-handling systems.

The drive can deliver a continuous motor phase current of 27.5 A, which supports mid-frame servomotors that require steady torque under constant load. Transient events such as rapid indexing are covered by a peak current limit of 55.0 A, giving the control system a two-to-one overload margin before current foldback. A current-loop update time of 125 µs minimizes the delay between a sensed error and the corrective output, while the velocity loop closes in 250 µs for precise speed regulation. When paired with high-resolution encoders, the command interface accepts pulse streams up to 720 kHz, so fine positional increments are not lost at high travel rates. The inverter can modulate phase voltage at frequencies up to 450 Hz, supporting high-speed spindle or linear motors without field weakening.

Stored energy for DC-bus stabilization is supplied by a capacitor bank rated at 820 µF. This buffer absorbs switching ripple and accommodates 76 J of braking energy at the full 460 V level. With an output capability of 12.0 kW, the unit draws 13.3 kVA from the mains and has a nominal input current of 16.7 A RMS, while soft-start circuitry limits maximum inrush current to 32.2 A RMS. Conversion losses are limited to 300 W, allowing panel ventilation to be sized for moderate heat dissipation. A dedicated brake driver supplies 0.5 A to motor-mounted holding brakes. The enclosed package weighs 35 lb, reducing the mounting load in compact enclosures.