Motor coil rewinding repair: We accommodate all types of motors, regardless of model, year, or country of production!
■What is coil rewinding for motors? - Coil rewinding refers to the process of removing a burnt or deteriorated coil and replacing it with a newly manufactured coil to restore a faulty motor. - Our company is capable of repairing coil rewinding (rewinding) for various types of motors. We can handle rewinding and manufacturing for low-voltage squirrel cage motor stator coils, as well as high-voltage motor stator coils, DC motors, winding type motors, and more, regardless of the type of motor. We also support rewinding repairs for rotor (armature/rotor) coils. Additionally, we accept rewinding repairs for brake coils and magnet coils, as well as prototype production for special coils used in research and development. ■Strengths of Kamaishi Electric - Since our establishment, we have been engaged in the maintenance of motors and pumps, and we have also been involved in the rewinding maintenance of burnt coils since the beginning, which is one of our strengths. - We have started nationwide support for coil rewinding maintenance. If you are experiencing issues with burnt coils, please feel free to contact us.
Inquire About This Product
basic information
■Features of Our Motor Coil Rewinding Maintenance 1. There are no restrictions on the type of motor or its output capacity. We accommodate various types of motors, including high-voltage motors and DC motors. 2. With over 70 years of experience since our founding, we have honed our skills in motor coil rewinding, insulation reinforcement through impregnation, and thermal spraying, ensuring high quality. We not only rewind motor coils but also extend their lifespan. 3. We propose appropriate measures for extending the life of the motor based on the specific condition of each customer's motor, reducing costs compared to purchasing a new motor. 4. We will consider expedited service based on the customer's situation. Please consult with us first. ■Support for Old Motors / Imported Models <Motors Eligible for Coil Rewinding Maintenance> - Low-voltage squirrel-cage motors - Wound motors (both stator and rotor coils) - High-voltage motors - DC motors (both stator and rotor) - Brake coils - Magnet coils - Various coils for generators *The above are examples. We can rewind various types of motor coils, so please feel free to consult with us.
Price information
We will provide a free estimate for the rewinding (recoiling) of motor coils. Feel free to contact us even if it's just for an estimate inquiry.
Delivery Time
※Depending on the motor specifications (please feel free to contact us).
Applications/Examples of results
- Rewinding of high-voltage motor stator coils (340kW) - Rewinding of DC motor armature coils (75kW) - Rewinding of coil for winding-type high-voltage motor (75kW 8P) - Rewinding of rotor coils for generators for ships (400kVA) - Rewinding of coils for underwater pump motors (37kW) - Rewinding of excitation coils for generators - Rewinding and repair of crane brake coils, etc. *The above are examples.
Detailed information
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High Voltage Motor Stator Coil Rewinding ● Condition Before Maintenance This motor has been in use for many years. Although the coil is not burnt out, signs of aging deterioration have been observed. The customer requested, "We plan to update the equipment in a few years, but we want to operate without issues until the update," so we responded with coil rewinding maintenance. ● Results After Maintenance For high voltage motor coils, it is common to wind the coils using a wooden mold and then finalize the shaping with a pull-out machine or similar equipment. This is not limited to high voltage motors; during the coil insertion process, careful work is required to avoid damaging insulating materials such as insulation tape. After conducting a pressure test and confirming there are no issues, assembly and finishing are performed, and finally, a no-load test is conducted to complete the maintenance. One Point Advice While round wire is often used for low voltage motor coils, flat wire is generally used for high voltage motors. In the case of flat copper wire, recent years have seen significant delays in material delivery due to major domestic manufacturers withdrawing from the market or relocating production overseas. However, our company has secured procurement routes for coil materials.
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Rewinding of the Armature Coil of a DC Motor ● Condition Before Maintenance In this case, the armature coil was burned out, and it was necessary to rewind the armature (the rotor of the DC motor). Upon disassembly and inspection, it was confirmed visually that the coil had turned black overall, indicating a burned condition. ● Maintenance Result The armature coil was removed, and a newly manufactured (rewound) armature coil was installed. Various insulating materials were updated, and insulation treatment (such as varnish impregnation) was performed, completing the rewinding. ● One Point Advice In the maintenance of DC motors, there are cases where rewinding the coil is not necessary even when there is zero insulation. Specifically, when the main pole (or auxiliary pole) coil is mounted on the stator, it may show zero insulation, but upon removing the coil and measuring, no issues with insulation or coil resistance are observed. In such cases, it is often the degradation of the insulating material between the stator (iron core) and the coil that causes the insulation to be zero. In this case, regeneration is achieved through the new manufacture and replacement of insulating materials and overhaul.
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We received a consultation from a customer regarding a burnt brake coil, and we picked it up from the site and repaired it at our factory. The item we are introducing this time is the rewinding repair of the electromagnetic brake coil used in a 10-ton crane at a logistics center. ● Condition before maintenance (Before) As reported by the customer, the brake coil was completely burnt out. ● Maintenance results (After) During the repair process, we disassemble the coil and check the number of turns. Once the coil is rewound, we complete the process with varnish impregnation, compound treatment, varnish finishing, and various insulation treatments. ● One-point advice When brake failure is confirmed, burnt brake coils are suspected, so please feel free to contact us. We also accept repairs, manufacturing, and prototyping for coils other than those for motors, so please don't hesitate to reach out.
Company information
Since our establishment in 1949, we have been involved in the repair and maintenance of rotating machinery such as motors and pumps. Nowadays, we are engaged with various customers not only within Iwate Prefecture but also throughout the Tohoku region. We can service a wide range of motors, including AC (low voltage/high voltage), DC, wound types, and various gear motors, regardless of their type, including older models and those manufactured overseas. Of course, the same applies to pumps. In particular, there are now few companies in the Tohoku area that can rewind burnt coils, but since our founding, we have continued to rewind coils and can accommodate various types of motors as mentioned above. Recently, it often takes a long time to receive new products, so please consider coil rewinding maintenance in the event of burning troubles or insulation failures. We also accept coil manufacturing. We can handle prototype coils for research and development purposes, so feel free to consult us. Additionally, we have thermal spraying equipment (for the regeneration of worn parts) and large no-load testing equipment (capable of handling large capacity motors), allowing us to provide comprehensive motor maintenance in-house. We also offer on-site maintenance services. Furthermore, we are actively engaged in the development of photocatalytic technology using thermal spraying. For more details, please visit our website.