Turnkey motor stator and armature production stations designed to integrate seamlessly into Zagreb’s automation cells, EV sub-assemblies, and heavy rail electrical overhaul yards.
How hydraulic-servo compaction and calibrated radial forming eliminate partial discharge risks, lower copper losses, and maximize slot fill factor in high-torque industrial stators.
In high-efficiency electric motors—ranging from IEC 60034-30-1 standard IE4/IE5 industrial drives to modern multi-phase electric traction powertrains—the magnetic slot-fill ratio is the primary determinant of continuous electrical performance and thermal resistance. Achieving an aggressive slot fill factor exceeding 78% necessitates not merely precision needle or wave winding, but dedicated secondary electro-hydraulic pressing and intermediate coil expansion. Without accurate stator coil pressing machinery, inserted copper bundles retain micro-voids, uneven overhang contours, and high parasitic loop resistances.
Modern stator coil pressing equipment manufactured by Zhejiang Rilvo Automation Equipment Co., Ltd. addresses the thermodynamic vulnerability of enameled magnet wire. During the pressing stroke, segmented expanding shoes and high-rigidity outer clamping dies exert controlled multi-axial mechanical forces. By synchronizing the bottom push-up cylinder, lateral shaping plates, and upper hydraulic head, our machines enforce symmetrical overhang geometry without micro-cracking the primary polyamide-imide (PAI) or polyimide (PI) insulation enamel layers.
For factory engineers operating within the Zagreb industrial ring, managing coil compaction repeatability translates directly into lower core losses and zero interference during rotor insertion. Our servo-hydraulic pressing units monitor continuous force-displacement curves (P-s profiles), arresting mechanical feed instantly if force deviations exceed 1.5%. This high-integrity monitoring prevents core skewing, tooth deflection, and the destructive delamination of silicon steel sheet stacks commonly seen under crude mechanical screw-press operations.
Furthermore, intermediate versus final pressing phases demand radically distinct kinematics. Intermediate pressing opens the stator slot mouth and compacts the bottom winding layer, freeing crucial clearance for two-phase or three-phase secondary insertions. Final coil reshaping compresses both end-turns axially and flares them radially away from the inner bore line, ensuring critical air gap tolerances (typically between 0.35 mm and 1.2 mm) remain entirely uncompromised prior to trickle impregnation or VPI (Vacuum Pressure Impregnation) cycles.
Tailored electro-mechanical tooling and automation lines supporting OEM factories in Jankomir, Žitnjak, Sesvete, and the wider Krapina-Zagorje industrial corridors.
Zagreb and Sveta Nedelja are recognized global epicenters for high-performance electric vehicle engineering. Rilvo's hydraulic coil shaping and pressing machinery supports custom copper hairpins, dense segmented stators, and liquid-cooled axial-flux architectures where millimeter fractions dictate overall power density and inverter switching stability.
Rooted in Zagreb’s long-standing electrical transport heritage, manufacturers of electric locomotives, low-floor trams, and regional rail vehicles require massive coil pressing tooling capable of shaping heavy-gauge square and flat copper conductors. Our high-tonnage units eliminate manual mallet shaping on auxiliary stators and main propulsion units.
From water treatment infrastructure along the Sava river to decentralized pump assemblies and marine electric propulsion built across Croatia, our equipment delivers consistent multi-slot wedge inserting, flat wire shaping, and automated end-turn coil compaction for standard IEC industrial frames 63 through 355.
Understanding the technical shifts, regulatory directives, and supply chain reshoring driving machine procurement in continental Europe.
1. Strict Adherence to EU Ecodesign Regulation (EU) 2019/1781: As European mandates enforce the phasing out of inefficient three-phase electric induction systems, Croatian electrical equipment fabricators are aggressively shifting lines toward IE4 (Super Premium) and IE5 (Ultra Premium) topologies. Meeting these stringent hysteresis and copper dissipation limits requires increased slot packing densities that cannot be achieved through manual winding and wooden-wedge compaction. Automated servo pressing guarantees an ultra-tight geometric overhang, shortening total mean coil length and cutting copper joule losses by 3.5% to 6.2% per stator assembly.
2. Transition from Round Wire Bundles to Hairpin Flat Copper Technology: Driven by tier-1 automotive suppliers throughout Zagreb County, hairpin stator architectures have migrated from niche prototypes to full-scale batch fabrication. Flat wire requires specialized pre-forming, CNC bar twisting, slot insertion, and final end-turn crown pressing. Our 5-SC-2B flat wire shaping systems and coordinated axial presses deliver uniform slot edge clearance without stripping thin PEEK or PPS high-temperature polymer dielectric films.
3. Nearshoring and Autonomous Production Robustness: In response to international logistics bottlenecks, Zagreb-based assembly plants are repatriating key winding, trickle impregnation, and coil pressing operations back within Croatian borders. Sourcing high-durability machines backed by proven ISO9001 quality infrastructure and in-house component machining eliminates dependency on multi-tiered sub-contracting networks across third countries.
Thirty years of industrial manufacturing prowess, vertical CNC production control, and proprietary automation intelligence engineered in Taizhou, Zhejiang.
Over 27 years of dedicated electro-mechanical fabrication. Our sprawling 60,000 m² campus features 20,000 m² of modern workshops with an additional 30,000 m² phase expanding automated assembly capacity.
Equipped with more than 150 dedicated machine tools, vertical machining centers, and surface grinders. Every clamping fixture, guide blade, and pressing die is turned in-house for extreme concentricity.
Under the stewardship of our President and Chief Engineer—honored as a National Knowledge-Worker Model—we combine mechanical, electronic, and optical vision disciplines with 17 national invention patents.
Zero blind deliveries. Every machine is calibrated and test-run with your specific stator laminations, slot paper, and magnet copper wire samples before departure from Ningbo Port, supported by video sign-off.
Clear, unvarnished technical and commercial clarifications addressing trade, commissioning, safety standards, and customized stator tooling.
Prior to machine fabrication, our engineering team requires your DWG/DXF drawings specifying stack outer diameter (OD), inner diameter (ID), slot count, lamination height, wire diameter, and overhang tolerances. Our in-house toolroom machines custom-segmented expanding fingers and contour dies hardened to HRC 58-62, ensuring zero deflection across hundred-thousand cycle runs.
Yes. All machines exported to Croatia are wired natively for 400V 3-Phase, 50Hz electrical supply networks. Control cabinets incorporate Schneider, Omron, or Siemens high-grade switchgear, CE-marked safety circuits, dynamic dual-hand start relays, optical light curtains, and localized English HMI operator panels.
We routinely export under CIF, CFR, FOB, and EXW incoterms. Cargo is typically dispatched from Ningbo or Shanghai port, transiting through the Adriatic gateway of Port of Rijeka (Croatia) or Port of Koper (Slovenia) before swift bonded trucking directly to your industrial site in Zagreb.
Every unit arrives packed in export-grade treated wooden crates with comprehensive electrical schematics, hydraulic loop diagrams, and replacement seal kits. We supply high-resolution video commissioning walk-throughs, remote PLC diagnostics over encrypted VPN gateways, and can dispatch commissioning technicians directly to Zagreb for multi-machine assembly line integrations.
Submit your stator dimensional blueprints, target cycle time, and production volume targets. Our lead application engineers will compile a detailed tooling proposal, mold simulation, and formal quotation within 24 hours.