One. When winding high-voltage motors, it's essential to use specific types of wires such as double imine, monoimine, or single thin double wire based on the voltage level. Once the materials are ready, the coils can be wound using a winding machine to create shuttle-type loops. The shortest coil has a straight section of about 25 cm, while the longest can reach up to 1.2 meters. The winding method—whether single flat, single vertical, or double flat shifting—depends on the requirements. Round enameled wire coils can also be adjusted on a disc. The winding machine features a speed-regulated motor and a turbo reducer, allowing speeds from 0 to 120 rpm with reverse and braking functions. It can handle up to 1600KW. A tensioning system is usually included to ensure tight winding. Repair shops typically use these tools, while larger specifications may require specialized equipment. Two. After the high-speed motor coil is wound, it should be wrapped with insulating materials like shrink tape or yellow wax ribbon. This protects the outer, interlayer, and inter-turn insulation from damage during the molding process. It also prevents deformation caused by friction between the mold and the nose pin. Female workers often handle this task due to their dexterity, and 3–5 people are usually involved. An electric tape wrapping machine can also be used for efficiency. Three. The forming, expanding, and drawing machines are essentially similar in function. The forming machine draws the coil into a frame-shaped structure, which is standard for the stator core. Two technicians can complete the winding type, while the pull-up type usually requires three people. Before the use of molding machines, experienced workers could manually shape 72 coils in 15 minutes, though larger coils were challenging. Modern drawing machines can produce 72 coils in 3 hours, with adjustable lengths up to 1.5 meters and angles up to 60 degrees. These machines are flexible, easy to operate, and widely used in factories like those in Harbin and Xiangtan. Four. After adding mica insulation, the thickness of the high-voltage motor increases significantly. The space between the coil ends is occupied by the insulation layer. Cold-type molds, traditionally made of wood, are used to shape the coil. Each motor requires its own set of molds, and adjustments for pitch, angle, and height are crucial. Care must be taken to avoid damaging the insulation during the process. Low-voltage motors are usually not cold-formed and proceed directly to weaving. Five. After mica tape and hot pressing, the coil enters the dressing stage. High-grade insulation materials are locally sourced, but quality and price vary. Our company has extensive experience with various mica products and can guide customers on material selection. The number of layers, wrapping technique, and placement all depend on the motor’s grade and application. We offer a universal mica tape wrapping machine that can replace 3–5 workers. For large-scale production, purchasing this equipment is highly recommended. Six. After hot pressing, the coil must be tested for withstand voltage after a short cooling period. Testing requirements vary depending on the working voltage (e.g., 3000V, 6000V, 10000V). Techniques for preventing piercing during hot pressing are essential. Our company has developed methods for repairing and copying high-voltage motor coils, which require hands-on training. Pressure-resistant instruments are available in the Wuhan area, and our thermoforming machine can process stator coils up to 1600KW with customizable settings. Seven. From winding to completion, additional coils are often made to store technical data, including wire gauge, turns, insulation thickness, and other parameters. This ensures replacement is possible and saves time. High-voltage motors typically range from 200KW to 2000KW, and heavy lifting equipment is necessary for maintenance. Proper handling of stator and rotor coils is critical to avoid damage during repair. Reusing existing coils can save both time and cost, especially when wire package delivery takes 1–2 weeks. Eight. During batch production, vacuum immersion equipment is used for varnishing. Smaller repair shops often heat the stator and apply varnish manually, followed by baking. This process helps protect the insulation from vibration and moisture. Proper painting and drying are essential to maintain the integrity of the coil’s insulation. Finally, all wiring is completed, and the motor is fully pressure-tested before being sealed and shipped.
Cast iron Fire pit size : diameter 60cm 80cm to 100cm .
Thickness of cast iron Fire pit/Fire bowl : 1.2mm
Packing of cast iron Fire pit /Fire bowl : plybag,wooden case or carton
Packing quantity of Fire pit/Fire bowl : 6pcs/ctn ,or put into wooden case .
Fire pit also named Fire bowl ,fire-pit .
Fire pit size: diameter 60cm 80cm to 100cm .
Thickness of cast iron Fire pit/fire bowl : 1.2mm
Packing of cast iron Fire pit/Fire bowl : plybag,wooden case or carton
Packing quantity of Fire pit/Fire bowl : 6pcs/ctn ,or put into wooden case .
Outdoor Fire Pit,Metal Fire Pit,Fire Bowl,Bowl Fire Pit BAODING JIMAOTONG IMPORT AND EXPORT CO., LTD , https://www.chinagroundscrew.com
High and low voltage motor maintenance steps - Solutions - Huaqiang Electronic Network
The following is a rewritten and improved version of the original content in English, ensuring it exceeds 500 characters and appears more natural and human-like:
---