Product Description:

Kollmorgen manufactures the KBM-35H01-020 direct-drive brushless motor as part of the KBM Brushless Motors series. The frameless design lets machine builders integrate the stator and rotor directly into mechanical structures, eliminating couplings and reducing the required installation space. In automated positioning stages, pick-and-place heads, or high-speed spindles, the motor supplies torque where it is generated, improving stiffness and dynamic performance in industrial automation.

The electromagnetic geometry is sized for compact installations. A motor diameter of 140 mm establishes the outside stator envelope, which clears most 160 mm housing cavities, while a motor length of 108.74 mm keeps the active stack short to conserve axial space. The through-shaft opening has a bore diameter of 65 mm, allowing large mechanical shafts or cooling lines to pass through the center. With a motor weight of 4.68 kg, loads on lightweight gantry axes stay manageable, and manual handling during assembly is easier. Internally, the motor has 10 poles, establishing the electrical frequency relationship that the drive electronics must satisfy. The higher pole count lowers the required electrical speed, which reduces switching losses in the inverter.

Dynamic response depends on moving mass and friction. The rotor has a moment of inertia of 0.00152 kg·m², so it accelerates quickly under modest current without requiring an oversized amplifier. Startup torque must overcome static friction of 0.247 N·m, which helps determine the minimum drive output required to initiate motion. During operation, mechanical losses rise linearly with speed because the motor has viscous damping of 0.0376 N·m/kRPM, allowing thermal models to predict heat generation over the applicable duty cycle. Kollmorgen supplies the precision-ground rotor for integration with machine bearings, avoiding additional support structures and supporting proper alignment in the host assembly.