Dongguan Vision Plastics Magnetoelectricity Technology Co., Ltd.

.gtr-container-7f3e9a { font-family: Verdana, Helvetica, "Times New Roman", Arial, sans-serif; color: #333; line-height: 1.6; padding: 20px; max-width: 100%; box-sizing: border-box; } .gtr-container-7f3e9a p { font-size: 14px; margin-bottom: 1em; text-align: left !important; word-break: normal; overflow-wrap: normal; } .gtr-container-7f3e9a .gtr-heading-level3 { font-size: 18px; font-weight: bold; margin-top: 1.5em; margin-bottom: 1em; color: #222; text-align: left; } .gtr-container-7f3e9a .gtr-heading-level4 { font-size: 16px; font-weight: bold; margin-top: 1.2em; margin-bottom: 0.8em; color: #222; text-align: left; } .gtr-container-7f3e9a hr { border: none; border-top: 1px solid #e0e0e0; margin: 2em 0; } .gtr-container-7f3e9a ul { list-style: none !important; margin: 1em 0; padding-left: 25px; } .gtr-container-7f3e9a ul li { position: relative; margin-bottom: 0.5em; font-size: 14px; text-align: left; } .gtr-container-7f3e9a ul li::before { content: "•"; color: #007bff; font-size: 1.2em; position: absolute; left: -20px; top: 0; line-height: inherit; } .gtr-container-7f3e9a ol { list-style: none !important; margin: 1em 0; padding-left: 30px; counter-reset: list-item; } .gtr-container-7f3e9a ol li { position: relative; margin-bottom: 0.8em; font-size: 14px; text-align: left; counter-increment: none; } .gtr-container-7f3e9a ol li::before { content: counter(list-item) "."; color: #007bff; font-weight: bold; position: absolute; left: -30px; top: 0; width: 25px; text-align: right; line-height: inherit; counter-increment: none; } .gtr-container-7f3e9a ol ul { margin-top: 0.5em; margin-bottom: 0.5em; padding-left: 20px; } .gtr-container-7f3e9a ol ul li::before { left: -15px; } .gtr-container-7f3e9a img { max-width: 100%; height: auto; display: block; margin: 1em 0; border: 1px solid #ddd; box-sizing: border-box; } .gtr-container-7f3e9a strong { font-weight: bold; } @media (min-width: 768px) { .gtr-container-7f3e9a { padding: 40px; max-width: 900px; margin: 0 auto; } .gtr-container-7f3e9a .gtr-heading-level3 { font-size: 18px; } .gtr-container-7f3e9a .gtr-heading-level4 { font-size: 18px; } } Replacing the magnets in a generator (specifically the permanent magnets found in many smaller alternators and brushless generators) is a detailed mechanical task that requires patience and safety awareness. Here is a comprehensive guide on how to do it. ⚠️ Important Safety Warning First High Risk of Pinching/Crushing: The rotor has an extremely powerful magnetic field. It can snap into place with tremendous force, easily crushing fingers or hands. Handle with extreme care. Demagnetization: Striking or dropping a permanent magnet can cause it to lose its magnetic field (demagnetize). Handle the old and new magnets gently. Personal Protective Equipment (PPE): Always wear safety glasses to protect your eyes from metal shards or epoxy, and heavy-duty work gloves to protect your hands. Tools and Materials You'll Need Replacement Magnets: Ensure they are an exact match for your generator model (size, shape, and strength). Workbench with a Vise: To securely hold the rotor. Puller Set (Gear Puller): Often essential for removing the old rotor from the shaft. Heat Gun: A propane torch can work but is riskier (can demagnetize magnets or damage metal properties if overheated). Dead-Blow Hammer or Mallet: To gently tap components loose. Screwdrivers, Wrenches, Sockets: To disassemble the generator. High-Temperature Epoxy (e.g., J-B Weld): For securing the new magnets. Isopropyl Alcohol : For cleaning the rotor surface. Marker or Punch: For marking orientation. Wooden Blocks or Non-Marring Shims: To protect the magnets and rotor. Step-by-Step Guide Phase 1: Removal and Disassembly Disconnect and Secure the Generator: Disconnect the spark plug wire on gas engines or disconnect all battery cables on diesel models. Ensure the generator cannot accidentally start. Gain Access to the Rotor: This typically involves: Removing the generator housing/shroud.    Removing the cooling fan and any air guides.    Unbolting and carefully removing the stator (the stationary coil assembly) from the engine block/rotor. Note the placement of any shims. Remove the Rotor Assembly: The rotor is usually pressed onto the crankshaft and held with a key and a nut.    Use the correct socket to remove the large nut on the end of the shaft.    Use a gear puller to carefully pull the rotor off the shaft. Do NOT hammer on the shaft end or the          magnets themselves, as this can damage the engine's bearings and demagnetize the magnets. Secure the Rotor: Once removed, clamp the rotor securely in a vise. Use soft jaws or wooden blocks to protect it. The shaft should be pointing up. Phase 2: Removing the Old Magnets Mark Magnet Polarity (CRITICAL STEP): Before removing anything, take pictures and use a marker to clearly indicate the North (N) and South (S) pole of each magnet. The alternating polarity (N-S-N-S) is crucial for generating electricity. Getting this wrong will render the rotor useless. Apply Heat: Use a heat gun to gently heat the area around one magnet. The goal is to soften the epoxy adhesive holding it in place. Avoid excessive, concentrated heat which can demagnetize the other magnets. Pry the Magnet Out:    Place a wooden shim or block against the magnet.    Use a mallet to gently tap the shim and work the magnet loose.    You can also try to slide a flat-head screwdriver between the magnet and the rotor, using the shim to protect the metal.    Work slowly and carefully around the magnet until it pops free. Repeat: Repeat the process for all magnets that need replacement. Phase 3: Installing the New Magnets Thoroughly Clean the Slots: Use a wire brush or sandpaper to remove all old epoxy and debris from the magnet slots on the rotor. Finish by wiping the area down with isopropyl alcohol. It must be perfectly clean and dry for the new epoxy to bond. Test Fit the New Magnets: Without any epoxy, ensure the new magnets fit perfectly into the slots. Apply Epoxy:    Mix your high-temperature epoxy according to the instructions.    Apply a generous, even layer to the bottom and sides of the magnet slot.    Also, apply a thin layer to the back of the new magnet. Insert the Magnets with Correct Polarity:    This is the most critical step. Refer to your markings and photos.    Carefully place each magnet into its slot, ensuring the polarity alternates (N-S-N-S) exactly as the old ones were.    The powerful magnetic forces will try to snap them into place. Use wooden blocks to carefully guide them and prevent your fingers from being caught. Let Epoxy Cure: Follow the epoxy manufacturer's instructions for full curing time (usually 24 hours). Do not disturb the rotor during this time. Phase 4: Reassembly Reinstall the Rotor: Once the epoxy is fully cured, carefully slide the rotor back onto the engine's crankshaft, aligning the Woodruff key with its keyway. Reassemble in Reverse Order: Reinstall the nut, washer, stator, cooling fan, and housing. Ensure all wiring connections are secure. Test the Generator: Start the generator and check its output voltage and frequency with a multimeter. It should be within the specified range (e.g., 120V / 60Hz). If the output is low or nonexistent, double-check your magnet polarity. When to Call a Professional Consider hiring a professional generator repair technician if: You are not comfortable with heavy mechanical work. You lack the proper tools (especially the gear puller). The generator is very large or expensive. You are unsure about identifying and maintaining correct magnet polarity. This is a complex repair, but with meticulous attention to detail—especially regarding polarity and safety—it can be done successfully.

.gtr-container-c7d8e9f0 { font-family: Verdana, Helvetica, "Times New Roman", Arial, sans-serif; color: #333; line-height: 1.6; padding: 15px; box-sizing: border-box; max-width: 100%; overflow-x: hidden; } .gtr-container-c7d8e9f0 p { font-size: 14px !important; margin-top: 0.8em !important; margin-bottom: 0.8em !important; text-align: left !important; line-height: 1.6 !important; } .gtr-container-c7d8e9f0 .gtr-title { font-size: 18px !important; font-weight: bold !important; margin-bottom: 1em !important; text-align: left !important; color: #1a1a1a !important; } .gtr-container-c7d8e9f0 .gtr-subtitle { font-size: 16px !important; font-weight: bold !important; margin-top: 1.5em !important; margin-bottom: 1em !important; text-align: left !important; color: #1a1a1a !important; } .gtr-container-c7d8e9f0 ul { list-style: none !important; margin: 0 !important; padding: 0 !important; } .gtr-container-c7d8e9f0 ul li { position: relative !important; padding-left: 1.5em !important; margin-bottom: 0.5em !important; text-align: left !important; font-size: 14px !important; line-height: 1.6 !important; } .gtr-container-c7d8e9f0 ul li::before { content: '•' !important; position: absolute !important; left: 0 !important; color: #555 !important; font-size: 1em !important; line-height: 1.6 !important; } .gtr-container-c7d8e9f0 dl { margin: 0 !important; padding: 0 !important; } .gtr-container-c7d8e9f0 dt { font-weight: bold !important; margin-top: 1em !important; padding-left: 0 !important; text-align: left !important; font-size: 14px !important; color: #333 !important; } .gtr-container-c7d8e9f0 dd { margin-left: 0 !important; padding-left: 1.5em !important; text-align: left !important; font-size: 14px !important; line-height: 1.6 !important; color: #555 !important; } .gtr-container-c7d8e9f0 img { max-width: 100% !important; height: auto !important; display: block !important; margin-top: 1em !important; margin-bottom: 1em !important; } @media (min-width: 768px) { .gtr-container-c7d8e9f0 { padding: 25px; } .gtr-container-c7d8e9f0 .gtr-title { font-size: 20px !important; } .gtr-container-c7d8e9f0 .gtr-subtitle { font-size: 18px !important; } } Custom Neodymium Arc Magnets – Wholesale Large & Small Curved Magnets Neodymium arc magnets are strong curved rare earth magnets. With unique shape – segment, a set of diametrically arc magnets can be used to form a ring. Arc magnets make up for the shortcomings of ring magnets. They are the most popular shape of permanent magnets and typically used in permanent magnet motors, generators and torque couplings, pumps, magnetic bearing, halbach. What’s more,can you imagine it? It can also be used for Magnetic Nail Polish! What Is the Reason for Using Curved Magnets? Too big neodymium ring is hard to make. Special magnetization direction can’t be made on magnet neodymium ring, such as radiation magnetizing Actual situation needs. For example, rotor and stator are cylinder, having curved magnets will allow magnets get closer to the stator. So it can decrease air gap and increase the flux between them. Specification of NdFeB Arc Magnets: Highest Quality Material: super strong neodymium magnets Multiple Grades: N35UH and N35SH, N40SH, N42SH, N38UH N52M, etc. Here choose more from our Neodymium Arc Magnets Grade. Wide Rang Of Working Temperature: motor and generator will generate a lot of heat and energy in high speed running. So, the built-in neodymium arc magnets have to withstand high temperature in operating, our max. working temperature range from default (up to 80 °C or 176 °F) to AH (230 °C or 446 °F). Durable Plating: to give superior corrosion resistance and provide a smooth and clean finish, arc magnet neodymium needs to be coated. The most common coating on curved magnets is epoxy. Zn and NI+CU+NI triple layer coating are also available. Here choose more from our Neodymium Arc Magnets Coating. Shape Variant: tile, bread, wedge shaped and arched magnets Size Range: 2≤L≤158mm, 3≤W≤90mm, 1.5≤T≤50mm, more details, please contact us directly. Tight Tolerance: ±0.05mm (±0.002”) Magnetiaztion Direction: each magnet’s north and south pole are on opposite flat faces or choose from our Magnetization Direction of Neodymium Arc Magnets. Limitless Uses: the strongest permanent magnet in the world and can provide more powerful, therefore, neodymium segment magnets can be used for a wide variety of projects around the house and industry, including motor, water treatment, wind turbine, nail beauty, camera lens.

N52 Arc Neodymium Magnets One Side Flat One Side Curved As Motor Rotor For Electricity Supply Overview: N52 arc neodymium magnets are powerful permanent magnets made from an alloy of neodymium, iron, and boron. They are commonly used in various applications, including electric motors, due to their strong magnetic properties.   Design: Shape: These magnets typically have one flat side and one curved side, allowing them to fit snugly into rotor assemblies. Grade: N52 denotes the strength of the magnet, making it one of the strongest commercially available grades. Applications: Electric Motors: Ideal for use in brushless DC motors or stepper motors, where efficient magnetic performance is crucial for energy conversion. Generators: Useful in power generation applications, where rotation in a magnetic field is required to produce electricity. Benefits: High Magnetic Strength: N52 magnets provide a strong magnetic field, improving the efficiency and performance of motors. Compact Size: Their strength-to-weight ratio allows for smaller and lighter designs without sacrificing power. Durability: Neodymium magnets are resistant to demagnetization, ensuring long-term performance in various environments. Considerations: Temperature Sensitivity: N52 magnets can lose their magnetism at high temperatures, so it's essential to consider thermal management in designs. Brittleness: These magnets can be brittle, so care must be taken during handling and installation to avoid chipping or breakage. Conclusion: N52 arc neodymium magnets are an excellent choice for motor rotors in electricity supply applications, providing high strength and efficiency in a compact form factor. When designing systems that utilize these magnets, be mindful of their temperature and handling characteristics to ensure optimal performance.