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Kollmorgen KBM-79H03-E03
Product Introduction:
The KBM series are frameless (kit) motors consisting of a stator and rotor without housing, bearings, or feedback, intended to be integrated directly into machine structures. The “79” denotes an approximate 259.6 mm outer diameter with a 152.4 mm through-bore; “H03” indicates stack length 3; “E03” specifies winding and insulation option.
Detailed content
Technical Specifications:
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Outer Diameter: ~259.6 mm (10.22 in)
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Through-Bore: ~152.4 mm (6.0 in)
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Stack Length Identifier: 3 (mid-range for KBM-79)
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Continuous Stall Torque: ~143 Nm (for H03-A reference; varies by winding E)
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Peak Stall Torque: ~637 Nm (reference H03-A; E winding differs)
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Max Bus Voltage: 560–640 VDC typical
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Insulation: High-voltage (>240 VAC) or standard (≤240 VAC) depending on S/E suffix (H implies high voltage here)
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Thermal Rating: Windings class F, continuous operation with machine thermal management
Functional Characteristics:
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Zero backlash direct drive, eliminating gearboxes
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High torque density in a slim, open architecture
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Optimized magnet arrangement for minimal cogging
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Compatible with AKD-series drives
Application Scenarios:
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Rotary tables and indexing heads
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Collaborative robot joints
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Semiconductor lithography stages
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Aerospace gimbal systems
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Medical CT/MRI rotation frames
Structural Features:
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Stator: Laminated core with epoxy-sealed windings, pre-formed lead exits
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Rotor: Multi-pole neodymium magnet rings bonded to a carbon-steel carrier
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No bearings or housing—machine provides mechanical support
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Typically includes thermistor (PTC/NTC) for overtemperature protection
Working Principle:
Direct electromagnetic interaction between the stator’s three-phase sinusoidal field and the permanent magnets on the rotor produces continuous torque proportional to drive current, controlled via closed-loop position/velocity from externally mounted encoders.
Installation Requirements:
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Machine structure must provide precise concentricity and axial alignment for integrated bearings
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Adequate cooling (conduction/convection) must be designed into the host structure
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Stator must be securely clamped to prevent micro-movement
Usage Precautions:
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Handle rotor magnets with care—strong magnetic fields can damage tools or attract ferrous debris
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Ensure through-bore clearance for cables/wiring
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Never operate without proper thermal monitoring; no self-contained cooling
