What are the selection criteria for brushless motor stator winding machines? How to balance price and quality requirements?

Winding the stator of a brushless motor is a crucial process. The quality and speed of the winding directly impact a manufacturer’s production. Therefore, choosing the right winding machine and manufacturer is extremely important. So, what are the standards for selecting a brushless motor stator winding machine? How do you balance price and quality requirements? Vacuz will briefly introduce this below!

I. Selection Criteria

1. Stator Parameter Compatibility

Slot Direction: Stators with inward-facing slots require a pin-type internal winding machine (such as a four-station/six-station internal winding machine) to ensure wire routing accuracy. Stators with outward-facing slots are suitable for a fly-fork external winding machine, which is more cost-effective and efficient.

Outer Diameter vs. Inner Diameter: Small stators (10-70mm) can be equipped with multi-station equipment (such as a four-station machine), while large stators (>120mm) require single-station equipment or customized models to avoid insufficient winding space.

Stack Thickness (Height): Stack thickness exceeding 70mm requires customized equipment to prevent excessive sway and wire breakage; stack thickness exceeding 150mm requires non-standard customization, which is difficult to meet with ordinary equipment.

Number of Slots and Slot Distance: A large number of slots and a small slot distance (e.g., <0.5mm) require high-precision equipment (error ≤ ±0.01mm) to avoid scratching the wire.

2. Wire Diameter and Winding Method

Wire Diameter Range: Fine wire (<0.1mm) requires precise tension control, and the speed can be appropriately increased; thick wire (>0.8mm) requires reduced speed and increased tension to ensure coil tightness.

Multi-Wire Parallel Winding: Requires synchronous winding function and a complex wire arrangement system to prevent wire tangling, suitable for high-power-density motors.

Number of Coil Turns: For a large number of turns, choose a high-speed multi-station external winding machine (e.g., six-station) to improve efficiency; for a small number of turns but high precision requirements, choose a precision single-station machine.

3. Equipment Performance and Configuration

Core Components: Prioritize imported servo motors, precision guide rails, and high-rigidity lead screws to ensure equipment stability and lifespan.

Control System: Employ PLC or touchscreen for preset parameters, supporting multi-station collaborative control to enhance automation.

Wire Laying System: Equipped with high-precision tensioners, steel needles, and other accessories to ensure wire laying flatness ≤0.05mm, preventing wire breakage or damage.

Mold Precision: Mold error must be controlled within ±0.01mm, and wear resistance and hardness must meet long-term use requirements.

4. Production Efficiency and Flexibility

Number of Workstations: More workstations (e.g., six) result in higher production efficiency, but also increased costs; a balance must be struck based on production volume requirements.

Customization Capability: For irregularly shaped slots or ultra-thick stacked stators, select manufacturers with non-standard design capabilities to ensure equipment compatibility.

Parameter Flexibility: Support for rapid adjustment of winding speed, tension, and other parameters via the control system to adapt to diverse production needs.

5. After-sales Service and Technical Support

Response Speed: Choose manufacturers that offer 24-hour response and 48-hour on-site repair to minimize downtime losses.

Training and Maintenance: Manufacturers must provide operation training, regular maintenance (such as cleaning and lubricating key components), and spare parts supply services.

Industry Reputation: Prioritize manufacturers with a good market reputation and extensive case studies to reduce the risk of equipment failure.

II. Price and Quality Assessment Methods

1. Price Range

Standard Equipment: The price of a flying fork external winding machine is approximately 80,000-120,000 RMB, suitable for small-scale production or low-precision needs.

High-end Equipment: The price of a needle-type internal winding machine is approximately 140,000-190,000 RMB, especially six-station or eight-station high-speed internal winding machines, suitable for large-scale or high-precision production.

Customized Equipment: The price of non-standard customized models needs to be negotiated based on specific requirements, and is usually 20%-50% higher than standard models.

2. Quality Assessment Dimensions

Winding Accuracy: Check the accuracy of coil turns, wiring accuracy, and wire flatness. Errors must be controlled within ±0.05mm.

Equipment Stability: Verify through no-load operation tests (observing speed stability and bearing heating) and long-term operation tests (continuous operation for over 8 hours).

Applicability: Confirm whether the equipment supports multi-specification stator winding and whether mold replacement is convenient (e.g., quick-change structure).

Maintenance Costs: Evaluate the replacement frequency and price of vulnerable parts (e.g., tensioners, steel needles), prioritizing modular design equipment to reduce long-term costs.

3. Cost-Effectiveness Optimization Strategy

Clarify Needs: Determine the equipment type (e.g., single-station vs. multi-station) based on production scale, product specifications, and accuracy requirements.

Compare Configurations: Within the same price range, prioritize equipment with superior brands for core components such as servo motors and guide rails.

Reference Cases: Request industry application cases from manufacturers, conduct on-site inspections of equipment operation performance, and gather user feedback.

Negotiation Techniques: Utilize competitive pricing from multiple manufacturers.

 

What are the selection criteria for brushless motor stator winding machines? How to balance price and quality requirements? The above provides a simple explanation; hopefully, this information will be helpful!