High-Performance Motor Manufacturing Systems
Engineered for stator winding, lacing, wedge inserting, rotor surface machining, and mechanical shaft pressing. Delivered with full tooling customized to your technical drawings.
HF New CNC Auto Stator Coil Winding Machine (8 Heads, 3000 RPM)
Designed for high-speed multi-station induction and fan motor coils. Equipped with multi-axis CNC tensioners.
HF Single Side Lacing Machine for Stator End Coils (380V/220V)
Rigid single-needle binding for motor coil heads, preventing electromagnetic vibration and insulation abrasion.
Hydraulic Stator Shaft Inserting Press Machine (Gear-Driven)
Controlled ton-force interference pressing to guarantee bearing concentricity and eliminate shaft deflection.
Six-Station Outer Stator Motor Coil Winding Machine (PLC Core)
Continuous turret rotation for high-batch external winding applications. Programmable turns and wire indexing.
HF-BS20 Servo Double-Side Automatic Coil Lacing Machine
Simultaneous upper and lower coil head binding with programmable tension, pitch stepping, and edge clearance.
Precision SC45 / Low-Carbon Motor Shafts & Custom Spares
Induction-hardened, precision-ground rotor shafts tailored for submersible pumps, blowers, and automotive actuators.
Automatic Stator Coil & Wedge Paper Inserting Machine
Single-stroke simultaneous coil insertion and slot wedge feeding to eliminate enameled copper micro-scratches.
Rotor Rough Turning & Surface Cutting Machine with Coolant Pump
Rigid high-precision rotor OD skimming to guarantee micro-tolerance stator-rotor magnetic air gap symmetry.
Engineering Deep-Dive: Internal Stator Needle Winding Architecture
Analyzing kinematics, copper fill density, and tension regulation for internal slot geometries in high-efficiency brushless synchronous motors.
Precision Inner Stator Slot Topologies & CNC Needle Kinematics
Manufacturing internal slot stators—where copper coils reside within the inner diameter (ID) of an unsegmented laminated core—represents one of the most mechanically demanding tasks in electric motor manufacturing. Unlike external rotor winding or open-frame linear tooth winding, internal stator coil winding requires precision multi-axis CNC needle winding technology. In this kinematic arrangement, a hardened tungsten-carbide or polished ceramic-tipped winding needle traverses linearly inside the stator core bore while performing synchronized angular indexing within the cramped interior geometry.
Our machinery utilizes synchronized 3-axis to 6-axis servo drive configurations (interpolating X, Y, Z linear stroke with C-axis spindle rotation and A-axis needle tip angling). This allows the feeding nozzle to layer copper wire layer-by-layer directly into deep, narrow internal stator slots without scraping the delicate enamel insulation coating (Class H, 180°C to Class 220°C wire). By implementing closed-loop magnetic hysteresis tensioning units, mechanical tension fluctuations caused by rapid reciprocal acceleration changes (up to 4G deceleration at stroke ends) are held within an ultra-tight tolerance of ±1.5 grams-force.
Maximized Copper Slot Fill Factor
Standard hand-fed or traditional inserting machines achieve between 32% and 38% slot fill. Our automated internal needle winding machines consistently attain a 48% to 54% net copper fill factor, drastically cutting I²R resistive losses and increasing torque density in compact EV actuators.
Controlled End-Turn Overhang
Excess copper at the stator coil head wastes expensive raw materials and causes thermal hotspots. The multi-axis CNC path generator minimizes the physical height of the end-turn overhang by up to 22%, saving continuous wire weight and enabling tighter motor housing integration.
Zero Segmental Runout
Rather than relying on split-tooth stator cores that demand complex laser welding or interlocking dies (which degrade stator magnetic core loss by up to 15%), our internal winding process works directly on solid one-piece laminated stator stacks, preserving magnetic flux path uniformity.
Standard Technical Parameter Matrix for European Stator Production
The following baseline engineering parameters apply to our internal stator winding and ancillary assembly machines built for export into the Czech Republic and wider Central European industrial zones.
| Machine Series | Applicable Stator ID / OD | Stack Height Range | Wire Diameter Range | Max Winding / Cycle Speed | Main Control Architecture |
|---|---|---|---|---|---|
| HF-LO2 Internal Winder | ID: Ø18 mm – Ø120 mm | 10 mm – 160 mm | Ø0.12 mm – Ø1.35 mm | Up to 1,200 strokes/min | Siemens S7-1200 / Delta CNC + Servo |
| HF-CNC Multi-Head Coil Winder | OD: Ø40 mm – Ø220 mm | 12 mm – 200 mm | Ø0.08 mm – Ø1.20 mm | 3,000 RPM spindle velocity | Multi-Axis Motion Controller + HMI |
| HF-BS20 Double-Side Lacer | ID: Ø25 mm – Ø160 mm | 15 mm – 180 mm | Braided Cord / Polyester Lacing | 0.5 – 0.8 sec / stitch | Dual-Servo Needle + Turret Indexer |
| Automatic Wedge & Coil Inserter | ID: Ø30 mm – Ø150 mm | 20 mm – 220 mm | Copper & Al Enameled Wire | 25 – 45 sec / complete stator | Hydraulic / Servo Pushing Rods |
| HF-C60 Rotor Fine Lathe | Rotor OD: up to Ø140 mm | Core Length: up to 250 mm | Tolerance: ±0.005 mm runout | Continuous Variable Inverter | Pneumatic Chuck + Micro-feed PLC |
Localized Application Scenarios in Liberec & Northern Bohemia
Empowering the regional mechanical engineering cluster spanning Liberec, Jablonec nad Nisou, and the Mladá Boleslav automotive corridor.
Automotive Subsystems & EPS Drives
Northern Bohemia is integral to Central Europe’s premier automotive supply chain. Tier-1 and Tier-2 manufacturers around Liberec require high-reliability internal stators for Electric Power Steering (EPS), electronic throttle control, active suspension actuators, anti-lock braking (ABS) pump motors, and variable valve timing systems requiring 100% automated traceability and Zero-Defect coil winding quality.
HVAC Blowers & Commercial Compressors
With industrial plants across the Liberec Region manufacturing commercial heat pumps, climate conditioning chillers, and industrial air handling systems, our winding equipment supports high-volume manufacturing of energy-efficient Permanent Magnet Synchronous Motors (PMSM) and variable-frequency fan blowers that conform strictly to EU Ecodesign ErP efficiency tiers.
Mechatronics, Robotics & Textiles
Originating from Liberec’s rich history in textile machine building and contemporary robotic automation centered around the Technical University of Liberec (TUL), local OEMs produce custom hollow-shaft frameless torque motors, automated guided vehicle (AGV) hub motors, and cobot joint actuators using our compact multi-pole inner stator winders.
Macro Trends Reshaping Stator Manufacturing in the Czech Republic
Addressing acute technical labor shortages, escalating electricity tariffs, and the imperative for Industry 4.0 integration.
Mitigating Central European Labor Deficits
The Czech manufacturing sector continuously faces ultra-low unemployment rates and fierce competition for skilled assembly technicians. Transitioning from semi-manual winding fixtures to our fully automated 6-station and needle-winding machines allows regional factories to multiply hourly unit output per worker by a factor of 4.5x while lowering scrap rates below 0.3%.
Energy Efficiency & IE4/IE5 Motor Mandates
European environmental regulations mandate high motor efficiencies. Achieving IE4 and ultra-premium IE5 performance levels demands uniform coil geometry, high slot filling, and precise slot wedge positioning to reduce internal iron and harmonic copper losses. Our automated inserting and lacing machines deliver repeatable electrical impedance and minimal phase resistance delta across large production batches.
Connected Industry 4.0 & OPC-UA Interoperability
Modern production facilities throughout the Liberec Industrial Zone mandate comprehensive SCADA/MES connectivity. Our machines offer optional Siemens S7-1500 controllers equipped with Profinet, Modbus TCP, and OPC-UA open protocols, allowing live collection of winding tension curves, cycle durations, lot numbers, and alarm histories directly into enterprise ERP databases.
Turnkey Production Architecture: From Lamination Stack to Finished Rotor
Our 8-stage synchronized manufacturing line eliminates bottlenecks and guarantees structural and electromagnetic balance.
Slot Insulation Inserting
Continuous unrolling, heating, creasing, edge-cuffing, and pushing of Nomex, DMD, or Mylar insulation paper into every core slot with zero insulation tear.
CNC Coil Winding
High-speed internal needle winding or multi-head flyer winding of enameled wire, delivering precise turn counts, precise layering, and controlled coil pitch.
Coil & Wedge Insertion
Synchronous hydraulic/servo transfer of wound coils alongside rigid composite slot wedges into the stator bore in one single mechanical stroke.
Intermediate Coil Forming
Radial expanding and axial pressing dies flare end-turns outward, establishing clear inner bore clearance for subsequent automatic needle lacing passes.
Automatic Stator Lacing
Dual-needle simultaneous upper and lower coil head binding with variable stitching patterns (slot-by-slot or interval jump) to securely lock winding leads.
Final Dimension Forming
High-tonnage die calibration of the completed stator coil heads, guaranteeing outer diameter and height clearances meet stringent OEM motor casing tolerances.
Rotor Fine Turning
Precision skim cutting of the rotor outer lamination diameter with diamond tooling, eliminating mechanical eccentricities and guaranteeing air-gap balance.
Rotor Shaft Pressing
Gear-driven hydraulic interference pressing of induction-hardened SC45 steel shafts into rotor laminations with monitored depth and load thresholds.
Engineering Advantages: Why Global OEMs Partner With Zunqi
Headquartered in Dongguan's premier manufacturing corridor with 17+ years of dedicated international machinery supply.
Custom Tooling to CAD / Stator Samples
Every winding former, inserting finger blade, and lacing fixture is custom CNC-machined to match your proprietary stator lamination drawing. We request a sample core prior to build signoff and supply high-resolution video proof of continuous testing before container crating.
Configurable Western Automation Cores
We configure electrical cabinets using the industrial component brands your Czech maintenance engineers already know and trust. Choose between Siemens, Schneider Electric, Mitsubishi, Omron, Panasonic, or Delta PLCs, complemented by SMC or Airtac pneumatic valve blocks.
Direct Manufacturer Pricing & Fast Turnaround
Eliminate distributor and agent markups. Deal directly with our 51–100-person Dongguan production plant. Our technical sales engineering desk delivers comprehensive quotations, line cycle-time calculations, and tooling schematics within an average response window of ≤9 hours.
Frequently Asked Questions: Purchasing & Commissioning in Liberec
Detailed technical, logistical, and electrical guidance for Czech engineering procurement teams.
