Engineered by Zhejiang Rilvo Automation Equipment Co., Ltd. specifically to accelerate IE3, IE4, and Super-Premium IE5 induction motor production with high slot fill factors, repeatable electromagnetic integrity, and robust industrial reliability.
Simultaneous copper wire bundle and wedge insulation insertion into lamination slots. Hardened push blades prevent enamel peeling.
High-speed tension-controlled taping for starter and auxiliary motor coil loops using Nomex, Kapton, or fiberglass insulation tape.
Heavy-duty industrial coil winder featuring precision tooling heads, programmable pitch, and rapid tooling switch for batch operations.
Hydraulic/servo press monitoring force and displacement curves in real-time, eliminating shaft runout and core distortion.
Precision inverter hot-stake or TIG welding station for hairpin stators, busbar termination, and BLDC lead terminals without spatter.
Engineered for automotive alternators and compact marine induction generators. Accommodates multi-strand high slot-fill windings.
Heavy stator lamination wire embedding station designed for three-phase induction motors with variable stack lengths and slot depths.
Turnkey automated assembly line combining core insulation, coil winding, wedge insertion, end-turn shaping, testing, and trickling.
Designing motor stator, armature, and coil machinery since 1998 in Zhejiang, China.
In-house CNC machining parks, heat treatment, electrical assembly, and testing bays.
Patented winding nozzles, non-damaging insertion fingers, and high-speed coil shapers.
100% factory acceptance test (FAT) using buyer-specific stator packs and copper wire samples.
The industrial landscape of Zadar and the broader Adriatic coastline of Croatia is undergoing a profound structural modernization driven by European Union decarbonization mandates, maritime fleet electrification, and port automation initiatives. Three-phase induction motors (asynchronous squirrel-cage motors) represent the beating heart of Dalmatian industrial infrastructure—powering high-capacity port gantry cranes at Gaženica, marine auxiliary systems, aquaculture pumping stations in the Zadar archipelago, seawater desalination facilities, and HVAC networks across coastal commercial developments.
As the European Union enforces Ecodesign Regulation (EU) 2019/1781 setting mandatory IE3 (Premium Efficiency) and IE4 (Super-Premium Efficiency) performance baselines for electric motors operating within the single market, electromechanical original equipment manufacturers (OEMs) and rewind/retrofit facilities in Zadar face urgent pressure to modernize their fabrication technology. Achieving these strict electromagnetic efficiency standards requires unprecedented precision during the stator winding, slot paper insulation, coil insertion, end-turn forming, and resin impregnation stages. Zhejiang Rilvo Automation Equipment Co., Ltd. provides direct engineering and factory-direct exporting of computerized induction motor production machinery configured specifically to meet the high slot fill factors, minimal harmonic copper losses, and saline-resistant insulation parameters demanded by Zadar's industrial operators.
Equipment deployed in Zadar operates within an aggressive Mediterranean coastal environment characterized by ambient summer temperatures surpassing 38°C, relative atmospheric humidity above 85%, and airborne sea-salt particulate (chlorides) that accelerates electrolytic corrosion and breakdown of motor insulation systems. Induction motors manufactured or serviced with Rilvo automated machinery are tailored for several pivotal Dalmatian sectors:
Heavy-duty, high-starting-torque induction motors for ship-to-shore container cranes, portal slewing cranes, automated pallet conveyors, and bulk material handling systems requiring IP66 enclosures, Class H insulation, and low rotor thermal slip under intermittent S3/S4 loading.
Auxiliary propulsion thrusters, hydraulic power packs, bilge pumps, anchor windlasses, and vessel ventilation fans constructed across local boatyards and refit yards. Stators processed on Rilvo automated trickle impregnation lines deliver void-free marine varnish penetration resilient to saline moisture.
Continuous-duty drive motors for high-volume aeration pumps, seafood processing machinery (such as tuna and sea bass farming operations in Kali, Ugljan, and Gazenica cold storage hubs) demanding washdown-resistant induction motors with tight mechanical balance and zero shaft runout.
Croatian manufacturing is undergoing rapid re-industrialization through EU Cohesion funding and National Recovery and Resilience Plan (NPOO) grants. Motor manufacturers and repair hubs in Zadar are moving away from manual winding tables and semi-mechanized benches due to acute shortages of skilled winding technicians and the mathematical impossibility of achieving consistent IE3/IE4 slot fill manually. Key manufacturing transformations include:
1. Servo-Synchronized Wedge Insertion: Modern induction stators utilize multi-layer composite insulation (DMD, Nomex, or polyimide films). Rilvo’s 5 DQ-1 and DQ-2 series integrate automated wedge feeding from coil stock, precision creasing, cutting, and insertion synchronized with coil group pushes, eliminating manual insulation trimming and inter-phase short circuits.
2. Automated Horizontal Trickle Impregnation: Traditional dip-and-bake varnish tanks leave microscopic air voids inside deep stator slots, resulting in partial discharge (corona) under variable frequency drive (VFD) inverter switching frequencies. Rilvo's horizontal trickle impregnation systems apply metered epoxy/polyester resin directly to rotating pre-heated stator end-turns, utilizing capillary action to draw resin completely through the slot core, yielding 100% solid fill and superior heat dissipation.
3. Dynamic Mechanical Balancing & Real-Time Press Fit: Induction motor vibration directly impacts bearing lifespan in marine installations. Our Y-30 automatic rotor shaft pressing machine incorporates linear scales and load cells to record force-displacement graphs for each assembly, preventing lamination distortion and ensuring mechanical runouts under 0.008 mm prior to dynamic balancing.
| Equipment Model | Process Station | Stator / Rotor OD Range | Wire Diameter Range | Cycle Time / Capacity | Applicable IEC Frame |
|---|---|---|---|---|---|
| DB-5C Series | Automatic Stator Wire Winding | Ø 40 mm – Ø 220 mm | 0.15 mm – 1.40 mm (Multi-strand) | 25 – 45 sec / Stator Pack | IEC 63 to IEC 132 |
| 5 DQ-1 Series | Coil & Wedge Stator Embedding | Ø 50 mm – Ø 260 mm | 0.20 mm – 1.60 mm | 12 – 20 sec / Stroke | IEC 71 to IEC 180 |
| ZB-302 / ZB-303 | Heavy-Duty Coil Winding | Universal Spool Fixtures | 0.10 mm – 2.50 mm (Flat / Round) | Programmable Pitch Speed | IEC 80 to IEC 250 |
| DQ-226/100 | Automatic Trickle Impregnation | Ø 60 mm – Ø 300 mm | All Induction Stator Windings | Continuous Heating & Trickle | IEC 71 to IEC 225 |
| SW-130G Inverter | Terminal & Star-Point Welder | Universal Fixturing | Copper / Aluminum Terminals | 1.5 – 3.0 sec / Connection | Custom Busbars & Hairpins |
| Y-30 Series | Rotor Core Shaft Hydraulic Press | Max Stack Height 450 mm | Shaft Ø 10 mm – Ø 65 mm | 15 – 25 sec / Cycle | IEC 56 to IEC 160 |
Founded in 1998 in the Shatianyang Development Zone of Sanmen, Zhejiang, China, Zhejiang Rilvo Automation Equipment Co., Ltd. has developed over 27 years into a premier technology enterprise specializing in high-precision motor manufacturing automation. Unlike trading intermediaries, Rilvo controls every manufacturing phase inside our 60,000 m² campus—utilizing more than 150 advanced machining centers, CNC gear grinders, vacuum heat treatment furnaces, and laser calibration benches.
Our engineering team comprises 150 permanent employees, including 36 specialized mechanical and electrical R&D engineers led by senior researchers recognized with national technical awards. With 17 national patents covering servo-winding kinematics, gentle wire-guiding dies, and automatic slot insulation, we guarantee equipment reliability that seamlessly conforms to European CE Machinery Directive (2006/42/EC), Low Voltage Directive (2014/35/EU), and Electromagnetic Compatibility (2014/30/EU).
Every customized stator insertion machine, winding unit, and trickle impregnation plant is configured strictly to your technical drawings (lamination slot geometry, stack height, turn count, wire gauge, and thermal insulation class). Prior to export packing, machines undergo a rigorous Factory Acceptance Test (FAT) with actual customer sample materials, recorded via high-definition video documentation with complete dimensional and electrical test reports provided prior to dispatch.
Practical commercial, engineering, and logistics answers for procurement managers, factory directors, and workshop owners in Zadar and Croatia.
All machines built for export to Croatia and the European Union are engineered strictly to CE standards under the Machinery Directive 2006/42/EC and EN 60204-1 (Safety of Machinery - Electrical Equipment of Machines). Systems incorporate Schneider or Siemens electrical components, dual-channel safety door interlocks, category 4 optical safety light curtains, ergonomic emergency stops, and comprehensive English documentation with Declaration of Conformity.
We regularly ship under CIF, FOB, CFR, or DDU/DAP terms from Ningbo Port (located just 2 hours from our Sanmen factory). Ocean containers ship directly via Adriatic liner services to the Port of Rijeka or Port of Gaženica (Zadar), with a typical ocean transit time of 28 to 35 days. Machinery is vacuum-sealed in foil with industrial desiccant and secured within heavy solid-timber fumigated crates conforming to ISPM-15 standards to prevent marine corrosion.
Yes. Custom tooling is a core strength backed by our 36-member engineering department. Whether you manufacture standard IEC frame sizes (IEC 71 up to IEC 315) or specialized naval, submersible pump, or wind turbine yaw motor stators, you simply provide your 2D/3D CAD lamination drawings (.DWG, .DXF, or .STEP) and wire specifications. We machine dedicated insertion blades, wedge guides, and winding forms from premium Cr12MoV/SKD11 vacuum-hardened steel (HRC 58-62).
We do not dispatch equipment until it has been thoroughly tested using your exact lamination stacks, magnet wire, and slot insulation paper sent to our factory. We run full automated cycles, verify slot fill factor, conduct inter-turn surge testing, inspect enamel wire surfaces under magnification for zero scrape marks, and stream real-time video FAT runs for your engineering team's formal sign-off.
We provide complete English operation and maintenance manuals, detailed wiring diagrams, and high-definition video setup tutorials. For production lines, our technical field engineers can be dispatched on-site to Zadar for mechanical assembly, commissioning, and operator training. Furthermore, every machine is equipped with remote PLC Ethernet diagnostics, and consumable wear-parts (push blades, wire guides, cutters) are stocked for rapid dispatch via DHL/FedEx within 48 to 72 hours.
Yes. Due to the differing tensile strengths, elongation characteristics, and spring-back coefficients of aluminum compared to copper, Rilvo equips its winding and inserting machines with programmable electronic tensioners and specialized smooth-radius ceramic wire guides. Switching parameters between copper and aluminum is performed instantly through saved recipes on the HMI touchscreen.
Standard commercial terms are 30% T/T deposit upon order confirmation and engineering drawing approval, with the remaining 70% payable after successful FAT video inspection prior to shipment (Irrevocable Letters of Credit at sight are also accommodated). All machines are backed by a comprehensive 12-month mechanical and electrical warranty, with lifetime engineering consultation and firmware support.
For repair facilities and small-to-medium OEMs in Zadar scaling up operations, we recommend our modular Starter Automation Cell: comprising a ZB-302 programmable coil winder, a 5 DQ-1 automatic stator wire embedding machine, and a manual/pneumatic end-turn shaper. This configuration reduces stator fabrication time by over 70% while demanding minimal factory floor space.
