Electromagnets
 | FEATURES:
- Economical to build in low quantities
- Shortest first-unit delivery time
- Built from standard materials, utilizing standard tooling
- Enables affordable prototyping for experimental applications
- Successfully serves a broad range of applications
- Flexible options for heat dissipation
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Wire Wound Electromagnets
Stangenes electromagnets have been constructed in so many shapes and sizes that it is impossible to show them all at once. The following descriptions represent broad categories, which can be reconfigured almost infinitely.
Copper or optional aluminum windings enable a variety of weight to power output ratios.
Hollow tubes are built into the coil to provide a liquid cooling layer. Depending on power consumption and duty cycles, cooling may be unnecessary, or provided/supplemented by forced air.
Square or rectangular wire options enable reduced power requirements over round wire.
Foil Wound Electromagnets
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FEATURES:
- Extremely high winding precision
- Highest field accuracy with lowest transverse field
- Highest fill and packing factor, yielding highest field to weight ratio
- Economical to build in larger quantities
- Most compact weight and space-saving configuration
- Most flexible configuration in shape and size
- "Sculptable" for slots and holes
- Vastly improved heat dissipation
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A super-thin insulation layer between foil windings allows fill factors (compactness) unavailable from wire or hollow-tube windings. Foil also spreads current more evenly throughout each coil.
Unlike wire wound, foil coils can be cut or sculpted to accommodate special mounting or access needs. The current path is largely undisturbed, and the impact on the magnetic field is minimal.
Construction in "coil sets" (rather than a single large coil) lowers build costs and enhances field accuracy and predictability.
Copper, aluminum or combination windings enable customised coil sizes and power to weight ratios.
Foil construction has high thermal conductance, enabling cooling to occur in layers between windings.
Hollow Tube Electromagnets
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FEATURES:
- Best for "brute strength" applications requiring high power (20 kGauss and greater)
- Coaxial coolant path in direct contact with entire coil length
- Highest thermal conductance delivers maximum heat dissipation
- Extremely malleable into complex or unusual shapes
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Liquid coolant flows through the entire coil length inside the hollow tube centers. This allows greater winding heat transfer than any other construction method, enabling the highest field strengths with extremely low temperature rise.
Non-conductive tubing (plastic shown) carries coolant without impacting the magnetic field pattern.
Stangenes' design routes cooling liquid in parallel, despite the necessary series path for coil current. Each coil set receives fresh incoming coolant at the same temperature.
Positive isolation of turns eliminates shorting, allowing low AC losses.
Extreme flexibility and malleability enables electromagnets of nearly any shape, including racetrack, thin pancake, open yoke and much more.
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