Kollmorgen KBM™ Frameless Servo Motors Provide a Flexible, Compact, Low Cost Solution to Achieving Positional Accuracy

Published On: 16 January 2012

Servo control specialist, Inmoco, has extended its precision servo motor range with the introduction of the Kollmorgen KBM™ Series of frameless brushless servo motors. The frameless design of the KBM series provides a cost-effectively, compact solution to achieving positional accuracy in a smaller, more reliable motor package. It gives system designers the flexibility to specify a motor that fits the specific performance and dimensional requirements of the application, without incurring expensive engineering costs.

Derived from the proven and extensive portfolio of Kollmorgen servo motor designs, the KBM brushless series delivers optimised torque, power and speed within a cost-effective package and compact footprint. A wide range encompasses 14 frame sizes, from 60mm to 825mm in diameter, for 240V ac or 480V AC operation. In addition, to meet specific customer requirements, additional motor windings can be provided to allow optimised performance at lower voltages, typically 12VDC or 24V DC.

Each frame size of the KBM series is available with up to 3 or 4 stack lengths, and the motors feature fully encapsulated stator windings for superior thermal and environmental performance. Internal windings are rated for continuous duty operation up to 155oC (311oF), enabling highly reliable performance even under extreme duty and temperature conditions.

Key to the excellent torque performance of the KBM motors are rare-earth high-performance magnets. These provide high continuous torque ranging from 1.45 N-m to 3445 N-m, peak torque from 4.91 N-m to 12,812 N-m, across the power range from 550W to 18.5KW and speed range from 105rpm up to 18,600rpm.

The flexibility of the KBM series for OEM use is extended by a feature enabling the rotor hub dimensions of the motors to be customised within certain constraints, enabling machine builders to tailor the KBM to their unique physical requirements. In these and the standard motors, the rotor magnets are protected by metal retaining bands to enable fail-safe motor operation.

Further operational safeguarding is provided by integral PTC thermistor (avalanche-type) overload protection, which meets UL / CE agency compliance guidelines.

The flexible design and performance attributes of the KBM frameless brushless motors make them an attractive option for use in medical, metal processing/cutting, packaging, printing, aerospace, defence, and oil and gas equipment applications that demand a highly optimised and tightly integrated motion solution. The motors are also well suited for use in semiconductor and electronic assembly, renewable energy and vehicle electrification applications.

The KBM frameless brushless motors provide an ideal combination with Kollmorgen’s AKDTM Servo Drives for a complete, fully optimised motion solution. RoHS compliant, they have also been designed to UL and CE guidelines in order to more easily facilitate certification in customer’s higher-level assemblies.


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