Motor Winding Copper Wire
Motor Winding Copper Wire
Dimension: Round：0.016一7.0mm or Flat type：Thickness(a)0.3一10.0mmWidth(b):1.0一22mm
Thermal Class: 120(Class E), 180(Class H), 200(Class C), 220(Class C+), 240(Class HC)
Insulation Thickness: G1, G2 or single build, heavy build
Certificate: UL,CE,REACH,RoHS
Motor Winding Copper Wire
Motor winding copper wire plays a crucial role in the motor’s electrical energy-mechanical energy conversion system. These copper wires are usually installed in the motor’s stator; when an electric current passes through the wires, a magnetic field is generated in accordance with Ampère’s Law. This magnetic field then interacts with another magnetic field inside the motor, and an electromagnetic force is produced based on Fleming’s Left-Hand Rule. Finally, the electromagnetic force drives the motor’s rotor to rotate, thereby enabling the motor to operate.
Why Copper Winding Wires?
Although aluminum wires have an advantage in terms of cost, copper wires are widely used in mid-to-high-end and high-power motors compared with aluminum wires, thanks to their high electrical conductivity, low power loss, and strong reliability. Furthermore, we use 99.9% pure copper to produce the winding wires, which further enhances the motor’s performance, efficiency, and service life.
Popular SWG Specifications of Motor Winding Copper Wires
Swg 10 motor winding wire size is one hot sale wire, besides common models, we also support other standard and customized sizes, whether for round wires (0.016 – 7.0 mm) or flat wires (a: 0.3 – 10.0 mm, b: 1.0 – 22 mm).
| SWG | mm | SWG | mm |
| 8# | 4.064 | 18# | 1.219 |
| 10# | 3.261 | 19# | 1.016 |
| 11# | 2.946 | 20# | 0.914 |
| 12# | 2.642 | 21# | 0.813 |
| 13# | 2.337 | 22# | 0.711 |
| 15# | 1.829 | 23# | 0.610 |
| 16# | 1.626 | 24# | 0.559 |
| 17# | 1.422 | 25# | 0.508 |
Insulating Varnishes
Insulating varnishes mainly affect the temperature class of enameled wires, and also have an impact on their mechanical properties and chemical properties. Below are several types of insulating varnishes commonly used in our company:
| Type of Insulating Varnish | Main Chemical Composition | Typical Temperature Resistance Class | Key Characteristics | Typical Application Areas | Insulation Layer |
| Polyurethane (PUR) | Polyurethane | 155°C / 180°C | Directly solderable, good crack resistance, pinhole resistance | Small motors, instrument coils, electronic components, watches | Single / Double Layer |
| Polyester Imide (TPEI) | Polyester Imide | 180°C | High heat resistance, good mechanical/chemical resistance | Electric motors, transformers, ballast coils, refrigeration equipment | Single / Double Layer |
| Polyamide Imide (PAI) and Composite Varnishes | Polyester Imide + Polyamide Imide | 200°C / 220°C | Extremely high heat resistance, high mechanical/chemical resistance, corona discharge resistance | New energy vehicle motors, wind turbines, aerospace, high-voltage transformers | Single / Double Layer |
| Self-bonding Varnish | Polyvinyl Acetal + Polyamide + Bonding Layer | 155°C / 180°C | Self-curing and forming, no skeleton required | Voice coils, speakers, sensors, small motors | Single / Double Layer |
Why Choose Us?
1.We use high-quality raw materials: 99% oxygen-free copper (OFC) + high-quality insulating varnish = high-quality motor winding copper wires.
2.For each batch of products, we conduct sampling inspections. We perform tests including structural dimension testing, mechanical property testing, breakdown voltage testing, and direct solderability testing, and ensure the test results comply with the standards of IEC and GB .
3.Our products have obtained certifications such as UL, CE, REACH , and RoHS , so you can purchase with complete confidence.
4.Our team has over 10 years of export experience, enabling us to deliver the goods to you as soon as possible without delaying your production.
Motor Winding Copper Wire Price
The price of motor winding copper wires varies depending on the size and fluctuations in metal prices. Please contact us for specific prices. Our competitive prices ensure you obtain high-quality products without incurring excessive costs.
LP Industry’s Main Specifications for Motor Winding Copper Wire
| Name | Motor Winding Copper Wire |
| Conductor | Copper |
| Dimension | Round：0.016一7.0mm orFlat type：Thickness(a)0.3一10.0mmWidth(b):1.0一22mm |
| Thermal Class | 120(Class E), 180(Class H), 200(Class C), 220(Class C+), 240(Class HC) |
| Insulation Thickness | G1, G2 or single build, heavy build |
| Standard | IEC60317-16,60317-16/28,MW36 60317-29BS6811,MW1860317-18 ,MW20 60317-47 |
| Certificate | UL,CE,REACH,RoHS |
| Packing | 30kg-150kg ply-wood spool(250*400 / 250*500/ 250*600/ 250*730) |
| Standard | IEC,NEMA,GB,JIS |