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Electromagnetic Coil Manufacturers and Suppliers

IQS Directory provides a comprehensive list of electromagnetic coil manufacturers and suppliers. Use our website to review and source top electromagnetic coil manufacturers with roll over ads and detailed product descriptions. Find electromagnetic coil companies that can design, engineer, and manufacture electromagnetic coils to your company’s specifications. Then contact the electromagnetic coil companies through our quick and easy request for quote form. Website links, company profile, locations, phone, product videos and product information is provided for each company. Access customer reviews and keep up to date with product news articles. Whether you are looking for manufacturers of choke coils, ignition coils, or custom coils of every type, this is the resource for you.

  • Sag Harbor, NY 800-724-5952

    We are proud of the craftsmanship of our engineers. All of our products are made right here in the United States and we promise that these items are created from high quality resources. Our electrical coils are unique and efficient. We are dedicated to manufacturing the best coils around. Our teams utilize sophisticated to procedures to develop these top notch electrical coils. Give us a call today to learn more information!

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  • Bristol, CT 800-825-4319

    Established in 1973, Classic Coil Company is a Contract Manufacturer of electronic coils. We manufacture coils for a variety of industries; winding wire gauges from 4-58 AWG. We are ISO 9001-2015 certified, ITAR registered and DFARS Compliant. Our Engineering services allow us to assist with design, reduce cost, and increase efficiency in production. Call or visit our website to learn more about our capabilities.

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  • Bristol, CT 860-584-0927

    We are an ISO 9001:2015 certified company which is internationally known for manufacturing high quality electromagnetic-coils. It is our goal to provide quality products, a commitment to speedy delivery, and competitive pricing. We understand that every application is unique, so we encourage you to contact us to discuss your specific requirements. Call us at 1-860-584-0927 and find out what our 50+ years of experience can do for you.

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  • Alpha, NJ 800-867-3526

    Since 1962, Torelco has been a supplier of electric coils and transformers of superior quality. We offer custom coils, solenoid coils, ferrite core coils & toroid wound coils to serve a range of industries. Markets served include medical, military, electronics, and industrial. When you work with us, our promise is to build to the exact specifications and meet the custom needs of our customers.

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  • Antigo, WI 800-826-9741

    Johnson Electric Coil Company is a family owned manufacturer that specializes in custom transformers, coils and inductors. From three phase isolation transformers to single phase inductors and chokes, we carefully design our products to meet your exact specifications. Our experienced engineers are available to assist during every step of the process. Let Johnson make great parts for you!

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businessIndustry Information

An electromagnetic coil is a conductor of electricity that is in the shape of a coil, spiral, or helix, a series of wires wound around a core. It is used in devices where electric current interacts with a magnetic field (EMF). The coil design and shape enhance the strength of the magnetic field. The current from the coil generates a magnetic field. In cases where there is a time varying magnetic field, the interior of the coil has an EMF in the conductor.

When determining the direction of the magnetic field from a coil, the right hand, coffee mug, corkscrew, or right thumb rule is used, where the fingers represent the direction of the magnetic field lines of force, and the thumb, pointed upward, is the current. This same example can be used to determine the orientation and direction of the magnetic field.

The conducting material for an electromagnetic coil is wire, which is referred to as the winding. In the center of the coil is the core, magnetic axis, around which the wire is wound or looped. Though a core is not necessary for an electromagnetic coil, having one increases the strength of the field. The individual loops are a turn. Turns are insulated with a nonconductive material to keep them from passing current. Each end of the wrapped wire is left open and exposed to be attached to the circuit.

The strength of a coil is determined by the number of turns of wire, the number of wound wires, and the core. There are several varieties of cores made from metals or plastic. Four common cores types are iron, ferrite, toroidal, and laminated.

It is possible for any conductor to create a magnetic field around a conductor in accordance with Ampere’s Law. The coil shape significantly increases the strength of the magnetic field produced by the current. The strength of the field is further enhanced by increasing the number of windings around the core, which is an inductive or magnetic coupling.

In an inductively coupled winding, a time varying current applied to the outer winding produces a time varying winding in the other windings. The winding where the varying current is first applied is referred to as the primary, while the other windings are the secondary ones. This configuration is called a transformer.

An electromagnetic coil is an inductor that stores energy and is a passive electrical component since it has no gain and cannot control the flow of energy. Its purpose is to oppose changes in a circuit and block alternating current (AC), while letting direct current (DC) through. If there is a rapid rise in the flow of current, the electromagnetic field of an inductor inhibits and prevents the increase.

The most common form of an electromagnetic field is an inductor, which are found in radios to control interference and keeping it from being transmitted. In a transformer, two or more inductors are placed together to create overlapping magnetic fields.