Transformer & Coil Winding
Custom wound electromagnetic components manufactured to customer drawings, specifications and test requirements for demanding applications.
R.A.M. has years of experience in transformer winding, coil winding and custom wound electromagnetic components. All winding is performed to customer-provided drawings, specifications and test requirements. R.A.M. supports a wide range of winding geometries, core materials, wire types and insulation systems.
Transformer Winding
Custom transformers wound to customer drawings for a range of applications including power transformers, signal transformers, pulse transformers, current sensing transformers and high-frequency transformers. All windings are produced according to customer-specified turns, wire gauge, insulation and test requirements.
- Power transformers (various frequencies)
- High-frequency transformers
- Signal and pulse transformers
- Current sensing transformers
- Isolation transformers
- Military and aerospace transformers
- Multi-winding configurations
- Custom bobbin and toroidal cores
Coil Winding
Custom coils, inductors and chokes wound to customer requirements. R.A.M. supports bobbin-wound coils, air coils, single-layer and multi-layer winding, and specialty winding configurations including bifilar, trifilar and multi-strand winding.
- Bobbin-based coils and inductors
- Air core coils
- Single and multi-layer winding
- Bifilar and trifilar winding
- RF coils and inductors
- Filter chokes and common-mode chokes
- Custom inductance values
Toroidal Components
Toroidal transformers and toroidal inductors wound on customer-specified or R.A.M.-sourced cores. Toroidal winding is available across a range of core sizes, materials and applications.
- Toroidal power transformers
- Toroidal inductors
- Custom toroidal geometries
- Various core materials (ferrite, powdered iron, nanocrystalline, amorphous)
- High-density winding
Testing & Verification
All wound components are tested per customer requirements. Testing may include electrical characterization, dimensional inspection and visual inspection.
- Inductance measurement
- DC resistance measurement
- Turns ratio and polarity
- Insulation resistance
- Hi-Pot testing when specified
- Certificate of Conformance
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Have a requirement?
Send your drawing, specification or BOM and the R.A.M. team will review manufacturing feasibility and next steps.
Send RequirementsHave a Drawing, Specification
or Production Requirement?
Send us your requirements and the R.A.M. team will review the manufacturing approach, production feasibility, testing requirements and next steps.
Typical response within 1–2 business days · Build-to-print manufacturing partner · AS9100 & ISO 9001 certified