The servo motor core is a crucial part of servo motors, usually manufactured from high-performance silicon steel to enhance motor efficiency and performance. Its structural design focuses on high precision and reliability, enabling rapid response and precise control. The design also considers winding convenience and slot fill factor to improve motor performance. For example, segmented stator cores can significantly improve winding efficiency and slot fill factor.
Yuma Precision: Deep Customization & Full-Process Manufacturing Redefining the Benchmark of Servo Motor Cores
As high-end equipment advances toward ultimate performance, servo motor cores are no longer standard components, but strategic, highly customized parts that define the upper limit of overall system performance. Yuma Precision focuses on the deep customization and full-process in-house manufacturing of servo motor cores and stator assemblies. Starting from customer requirements, we provide one-stop solutions from collaborative design to finished product delivery, empowering every motor to achieve precise, efficient, and reliable power output.
I. Full-Process In-House Manufacturing: Controlling Every Performance-Critical Step
The core advantage of Yuma Precision lies in full control over all key processes across the entire industrial chain that influence the final performance of motor cores, ensuring that customization requirements are implemented accurately and consistently.
1. Material Customization & Precision Stamping
Material database & selection support: A comprehensive material portfolio ranging from conventional silicon steel (0.2 mm / 0.35 mm / 0.5 mm) to top-grade ultra-thin, high-performance materials. Professional material selection analysis is provided based on efficiency, cost, and operating frequency requirements.
In-house mold development: Independent design and manufacturing of high-precision progressive dies, enabling rapid response to non-standard slot shapes and special positioning hole designs. Stamping accuracy reaches ±0.01 mm, with burr height ≤ 0.02 mm.
2. Deep Customization Across the Core Process Chain
Yuma Precision’s proprietary full-process chain of “stamping → stacking → insulation frame insertion → winding → circular assembly → resin potting” is fully open to customization at every stage:
| Process Step | Customization Options | Impact on Performance |
| Insulation & Skeleton | Material (PPS, PA46, LCP, etc.), Temperature Rating (H~C grade), Structure (Single/Double Layer, with Guide Grooves) | Insulation reliability, heat dissipation, winding efficiency, and slot filling rate. |
| Winding | Wire Gauge, Winding Type (Concentrated/Distributed, Uniform Pitch/Short Pitch), Winding Method (Flying Fork/Pin Style), Number of Parallel Branches | Torque constant, back EMF, resistance and inductance, power density. |
| Roundness Fixing | Process Choices (Core Customization Points): Pure Encapsulation (High Precision), Laser Welding + Encapsulation (Ultra High Strength), Clip + Encapsulation (Economical) | Core stiffness, heat dissipation, cogging torque, manufacturing cost. |
| Encapsulation | Gel Performance (Thermal Conductivity, Viscosity, Elastic Modulus), Encapsulation Area (Local/Full) | Heat dissipation efficiency, environmental protection level (moisture-proof/corrosion-proof), vibration damping and noise reduction. |
II. How Custom Solutions Empower High-End Applications
Case 1: Collaborative Robot Joint Motors — Extreme Compactness & High Torque Density
Challenge: Extremely limited joint space, requiring continuous torque exceeding 30 Nm within a Φ30 mm envelope, with strict temperature rise control.
Yuma Precision solution:
Material: 0.20 mm high-grade silicon steel to reduce high-frequency core losses.
Design: 9/12-slot, 8/10-pole fractional-slot configuration to optimize cogging torque, combined with a large hollow structure.
Process: “Winding first, then potting and circular assembly” process, achieving an extreme slot fill factor exceeding 78%, while using high-thermal-conductivity potting resin to form efficient heat dissipation paths.
Results: Power density increased by 40%. Torque output far exceeded industry benchmarks within the same volume, while temperature rise was reduced by 15 K, ensuring long-term stable robot operation.
Case 2: High-Speed Electric Spindles — Precision & Reliability at Ultra-High Speed
Challenge: Spindle speed up to 40,000 RPM, requiring extremely low dynamic runout and long service life under high-speed conditions.
Yuma Precision solution:
Material: 0.15 mm ultra-thin silicon steel sheets with customized ultra-low-loss annealing process.
Process: Laser micro-welding + overall vacuum impregnation + precision resin potting triple-solidification process to ensure absolute structural integrity under extreme centrifugal forces. Litz wire is used for winding to reduce high-frequency eddy current losses.
Integration: Integrated micro cooling oil channels inside the stator for precise oil-spray cooling.
Results: Stable operation at extreme speeds, vibration level below G0.4 grade, and precision service life improved by more than three times.
III. Yuma Precision’s Manufacturing Commitments
Digital full-process traceability: Complete data recording from material batches and stamping parameters to winding tension and potting process parameters, supporting quality traceability and continuous process optimization.
Flexible production response: Production lines with rapid changeover capability, supporting both large-scale stable delivery and efficient small-batch, multi-variant R&D prototyping.
Systematic testing & validation: Comprehensive test reports covering single components (core loss testing) to assemblies (withstand voltage, insulation, functional tests), providing reliable performance validation.
Conclusion
As servo motors advance toward higher performance and broader application boundaries, Yuma Precision takes “deep customization” as its core and “full-process manufacturing” as its foundation, transforming servo motor cores from standardized parts into customized power cores that carry customers’ core competitive advantages. We are not only a supplier, but also a collaborative designer and manufacturing partner on our customers’ journey to higher motor performance. Through every sincere collaboration, we are committed to jointly advancing high-end equipment innovation.
Amid rapid breakthroughs in industrial control, automotive manufacturing, and embodied intelligence, Yuma Precision remains focused on the most critical components of servo motors—cores and stator assemblies. With deep process expertise, flexible customization capabilities, and reliable scalable manufacturing, we transform customers’ innovative concepts into stable, outstanding product performance. Yuma Precision is not merely a key link in the supply chain, but a long-term strategic partner that helps customers overcome technical challenges, define product benchmarks, and secure early market leadership.
Applications of Servo Motors
Robotics: Enabling precise motion control for robotic arms.
Automation Systems: Integral components for accurate positioning and velocity regulation.
CNC Machine Tools: Essential equipment for high-precision machining and cutting operations.
Pumps: Optimising performance and efficiency within fluid handling systems.
Customized Solutions for Servo Motor Core Laminations
Multiple Sizes: YUMA precision offers 300 variants of split cores, with dimensions ranging from 29mm to 410mm for custom servo motor stator laminations, catering to diverse motor design requirements. Our rapid OTS sample submission scheme allows for quick prototyping using pre-engineered molds, ensuring consistency between the development and mass production stages.
Custom Manufacturing Processes: Choose between simple die and progressive die processes, each customisable to meet your unique specifications and production demands.
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