Product Description:

The M-405-A-21 is a brushless AC servo motor produced by Kollmorgen and assigned to the M Goldline Servo Motors series. In automated machinery, it converts drive amplifier output into precise rotational motion, supplying repeatable torque and speed for indexing tables, packaging axes, or material-handling gantries. It is intended for closed-loop use with a compatible servo amplifier, where commanded current is translated into controlled shaft acceleration and holding torque. The brushless design supports controlled motion without brush wear, which helps the motor remain suitable for repetitive cycle operation. The unit follows a standard metric flange pattern for straightforward installation in compatible machine layouts.

The continuous phase current drawn under steady load is 6.0 A RMS, supporting demanding duty cycles during normal operation. At its rated operating point, the motor delivers 2.0 kW of mechanical power while turning at 1500 RPM, a combination suitable for mid-speed processes that still need significant torque capacity. A back electromotive force of 139.0 VRMS/kRPM indicates the voltage generated per thousand revolutions, allowing the drive to account for commutation and regenerative braking behavior. The winding inductance of 102 mH influences current ripple and the current-control bandwidth of the servo amplifier. Copper resistance is 4.10 Ω, and resolver feedback provides rotor position data with an analog sensing method that is well suited to industrial motion systems. These electrical characteristics affect how the amplifier responds to load changes at low and moderate speeds.

Dynamic events are handled by a peak torque of 35.9 N-m, which can be commanded when the amplifier supplies a surge current of 16.4 A RMS. This margin over the continuous operating range supports rapid acceleration and short-term load changes during start-stop motion. A rotor inertia of 0.00441 kg-m² balances responsiveness with torsional stability, which helps the axis remain predictable during tuning and direction changes. Sealing to IP65 prevents dust ingress and resists low-pressure water jets in exposed machine areas. The bayonet power connector and the absence of mating plugs support compact cable routing, and the resolver cable exits through the same interface. The connector arrangement keeps the external interface consolidated at one exit point, which helps reduce cable clutter around the motor body.