Technical & Performance Specifications

• Rated Input Voltage: 240 VAC single/three-phase servo drive power supply
• Continuous Rated Torque: 14.1 Nm
• Peak Overload Torque: 42.3 Nm (300% short-time overload capacity)
• Maximum Continuous Rotational Speed: 1200 RPM
• Hollow Shaft Inner Diameter: 41 mm through-hole cable/media passage
• Feedback Device (9327-001 Suffix): 23-bit sine/cosine analog rotary encoder absolute position feedback
• Insulation Class: Class F (155°C maximum winding temperature)
• Motor Stator Protection Class: IP54; rotor assembly IP67 with optional sealing kit
• Operating Ambient Temperature: 0°C ~ +40°C full rated torque output
• Axial Allowable Static Load: 650 N
• Radial Allowable Static Load: 900 N

Functional Features

1. Frameless stator and rotor split design for direct integration into machine spindle mechanical structure without intermediate transmission parts
2. Large 41 mm hollow through-shaft allows cable, air tube, hydraulic pipeline and workpiece passage through motor center axis
3. Zero mechanical backlash, ultra-high torsional stiffness delivers arc-second level rotary positioning repeat accuracy
4. 23-bit sine/cosine analog encoder achieves ultra-high subdivision resolution for smooth low-speed rotation without torque ripple
5. Class F high-temperature insulation supports continuous full-load operation for long-duration production cycles
6. Native compatibility with AKD-M and AKD-P servo drives for automatic motor parameter identification and closed-loop tuning

Material Composition

• Stator assembly: Laminated silicon steel core with Class F vacuum-impregnated copper winding coils, aluminum mounting flange
• Rotor assembly: Thin laminated silicon steel hub embedded with high-energy NdFeB rare-earth permanent magnet rings
• Encoder unit: Hermetically sealed sine/cosine analog encoder with metal alloy protective housing mounted on rear stator flange
• Mounting hardware: Stainless steel high-strength fixing bolts for stator fixture installation
• Optional sealing components: Fluorine rubber O-ring shaft sealing gaskets for IP67 rotor environmental protection

Structural Characteristics

1. Split frameless stator-rotor two-piece independent assembly structure, no integrated motor housing
2. Large central hollow through bore running through full rotor axial length for media and cable routing
3. Stator outer circumference standard threaded mounting holes for direct bolt fixation to machine frame spindle housing
4. Rear stator flange dedicated mounting interface for encoder feedback unit fixed installation
5. Rotor inner bore keywayless interference fit design for direct press-fit onto machine main spindle shaft

Working Principle

1. AKD servo drive outputs three-phase sinusoidal variable-frequency AC current to frameless stator winding coils
2. Rotating electromagnetic field generated by stator windings interacts with rotor embedded NdFeB permanent magnet ring to produce direct rotary torque output without mechanical transmission reduction
3. Rear-mounted 23-bit sine/cosine encoder captures high-resolution absolute rotor angular position data, transmits analog feedback signal back to AKD servo drive
4. Drive executes triple closed-loop torque/velocity/position control algorithms using encoder feedback data to achieve ultra-precise backlash-free rotary motion control of machine spindle load

Advantage Highlights

1. Direct-drive frameless design removes gearbox, timing belt and coupling mechanical transmission error and backlash
2. Large hollow through-shaft central bore simplifies machine media and cable routing layout
3. Ultra-high torsional stiffness delivers exceptional rotary positioning repeatability for precision rotary indexing equipment
4. Minimal torque ripple from high-resolution sine/cosine encoder enables vibration-free ultra-slow rotary operation
5. Split frameless structure reduces overall machine spindle assembly volume vs housed servo motors with transmission components
6. Eliminates transmission part wear and maintenance requirements, extending equipment continuous service lifespan

Applicable Industries

Installation Requirements

1. Press-fit rotor assembly onto machine main spindle hollow shaft with controlled interference tolerance per official dimensional specification
2. Mount stator assembly to machine spindle housing flange via full perimeter fixing bolts, ensure uniform flat contact surface
3. Maintain concentricity tolerance ≤ 0.01 mm between stator inner bore and rotor outer diameter during assembly to eliminate air gap eccentricity torque ripple
4. Install encoder unit onto rear stator flange after completing stator-rotor coaxial assembly
5. Separate servo motor power cable and encoder feedback cable routing with shielded twisted pair wiring, single-point ground shield connection
6. Install optional fluorine rubber sealing O-rings if operating in dust or coolant mist industrial environments