Product Overview
Engineered for applications demanding high torque-to-weight ratios and precise motion control, the High-Torque Brushless Servo Motor combines multi-pole permanent magnet rotor geometry with advanced slot-pole combinations to deliver exceptional continuous torque at low speeds without heavy gearboxes. This direct-drive architecture minimizes mechanical backlash, optimizes dynamic response, and ensures rigid positioning accuracy for demanding industrial automation environments.
Technical Specification Matrix
|
Parameter Category |
Performance Data |
|
Torque & Speed |
Continuous Torque: 5 Nm to 180 Nm Peak Torque: 15 Nm to 540 Nm Rated Speed: 100 RPM to 3000 RPM |
|
Electrical Rating |
Voltage: 48V DC to 380V AC Insulation: Class H (180 deg C) Dielectric: 1800V AC (1 min) |
|
Feedback Precision |
Encoders: 17-bit to 23-bit absolute / Resolver Accuracy: plus-minus 20 arcseconds Repeatability: plus-minus 5 arcseconds |
|
Mechanical & Environment |
Protection: IP65 standard (IP67 optional) Ambient Temp: -20 deg C to +50 deg C Cooling: Natural convection / Liquid jacket |
Performance Advantages
High Torque Density
Finite element analysis (FEA) increases active copper filling factors to over 78%, yielding up to 40% higher torque output within identical frame sizes.
Minimal Torque Ripple
Skewed stator slot designs and optimized air-gap flux distribution maintain torque ripple below 0.8% at speeds under 50 RPM for ultra-smooth velocity control.
Thermal Stability
Vacuum pressure impregnation (VPI) with high-conductivity epoxy eliminates internal air pockets, lowering thermal resistance and preventing thermal runaway.
Structural Rigidity
Integrated nodular cast iron and forged aluminum front flanges absorb severe radial and axial shock loads without housing deformation or bearing misalignment.
Target Applications
Robotics
Joint actuators for articulated and collaborative arms requiring high payloads and zero backlash.
CNC Machinery
Direct-drive rotary tables and indexing heads replacing worm-gear setups to eliminate wear.
Mobile Automation
Wheel-hub traction drives offering high starting torque and compact axial depth for heavy AGVs.
Semiconductor Tools
Wafer handling mechanisms requiring sub-micron positioning repeatability in cleanrooms.
Electromagnetic & Material Engineering
Slot-Pole Optimization
Minimizes cogging torque and harmonic distortion, ensuring smooth sinusoidal back-EMF waveforms across the speed range.
Magnet Grade Selection
N42SH to N52UH neodymium-iron-boron magnets maintain coercive force stability up to 150 deg C, preventing demagnetization under overload.
Winding Construction
High-purity oxygen-free copper wound using automated multi-axis insertion machinery for uniform phase resistance balance.
Internal Mechanical Construction
Rotor Assembly
Surface-mounted or interior permanent magnet configurations balanced dynamically to G0.4 grade to suppress high-speed vibration.
Stator Core
Stacked using 0.35mm and 0.5mm non-oriented silicon steel laminations with low core loss coefficients to reduce eddy current heat generation.
Bearing System
Preloaded angular contact and heavy-duty roller bearings rated for L10h operational life exceeding 50,000 hours under rated loads.
Control & Driver Compatibility
Protocol Support
Supports pulse/direction, plus-minus 10V analog, CANopen, EtherCAT, and Modbus RTU communication standards.
Autotuning Algorithms
Adaptive inertia identification measures load torque within three rotation cycles to optimize PID loop gains automatically.
Fault Monitoring
Real-time hardware signals for over-voltage, under-voltage, phase loss, over-current, and over-temperature protection.
Mechanical Installation Guide
Flange Alignment
Match the pilot diameter with the machine register and secure evenly using grade 12.9 socket head cap screws in a cross-pattern.
Coupling Practice
Use precision clamp-type or shrink-disc couplings. Avoid hammer impacts during installation to prevent bearing Brinell damage.
Shielded Wiring
Route power cables separately from encoder signal lines inside grounded metallic conduit and connect the housing ground stud directly to earth.
Customization & OEM/ODM Options
Electrical Adaptation
Custom winding turns, voltage constants (Ke), torque constants (Kt), and resistance matching for specific inverter bus supplies.
Mechanical Modifications
Tailored shaft diameters, keyways, splines, dual-shaft extensions, custom bolt circle diameters (PCD), and specialized flange geometry.
Integrated Options
Factory-integrated fail-safe permanent magnet holding brakes, planetary gearboxes, custom connector orientations, and IP68 housings.
Quality Control & Testing Protocols
Raw Material Testing
Spectral analysis of silicon steel sheets and magnetic flux hysteresis testing for every magnet batch.
In-Process Checks
Inter-turn insulation surge testing, high-potential dielectric testing, and dynamic balancing verification on all sub-assemblies.
End-of-Line Bench
100% automated load testing evaluating back-EMF symmetry, resolver zero-position alignment, thermal rise curves, and vibration spectra.
Frequently Asked Questions
Q: How is low-speed torque maintained without a gearbox?
A: High pole-count rotor designs generate strong magnetic flux linkage, allowing high continuous torque production directly at zero to low RPMs.
Q: What prevents permanent magnet demagnetization under overload?
A: High coercivity NdFeB material combined with optimized magnetic path clearance ensures peak currents up to 300% cause no degradation.
Q: Can windings be modified for non-standard DC bus voltages?
A: Yes, stator winding turns and wire gauges are engineered to match battery or unregulated supplies ranging from 24V to 650V.
Q: What encoder interfaces are supported?
A: Standard setups support BiSS-C, SSI, EnDat 2.2, incremental TTL/HTL, and multi-turn absolute magnetic feedback protocols.
Q: What is the sample lead time for custom designs?
A: Standard mechanical and electrical modifications typically require 3 to 4 weeks from drawing approval to sample dispatch.
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