Product Description:

The KBM-35H01-D20 is a frameless brushless motor supplied by Kollmorgen within the KBM Brushless Motors series. Because the stator and rotor are delivered without a housing, the unit can be embedded directly into the mechanical structure of an automation axis, eliminating transmission components and shortening servo loops. In packaging machinery, robotics, or semiconductor tooling, the motor provides direct-drive torque while keeping the overall envelope compact.

The motor delivers a continuous torque of 12.65 N·m while drawing a steady phase current of 10.57 Arms; these stall values indicate the sustainable torque and thermal load that the drive and machine frame must accommodate. A back electromotive-force constant of 74 Vrms/kRPM links generated voltage to rotational speed, guiding inverter sizing and regeneration limits. The torque constant is 1.23 N·m/Arms, showing the proportional relationship between phase current and developed torque, which helps with tuning current-mode control loops. Winding characteristics include 1.08 Ω of DC resistance at 25 °C and 8.5 mH of inductance, which influence copper losses and current ripple. The motor has ten magnetic poles, allowing high torque density at a moderate electrical frequency while improving low-speed smoothness.

Dynamic margins support rapid indexing: peak torque reaches 41.2 N·m when the drive supplies a surge current of 43.5 Arms for short intervals, allowing the axis to overcome inertial loads during acceleration. With a 240 Vac bus, the motor operates continuously at a rated speed of 2450 RPM and produces 2760 W of mechanical power. When commanded to full voltage under light loading, the rotor can reach 3252 RPM, providing additional speed capacity for applications with varying throughput requirements. The electrical characteristics support precise commutation, which helps minimize cogging during low-speed positioning. Appropriate current control is required to keep short acceleration demands within the motor’s peak operating range.