Power Product Types

MIL-PRF-27

Torotel is proud to say we are a provider to the Top 10 Department of Defense contractors. In fact, we manufacture over 300 fully qualified military magnetic components and are listed on many MIL-PRF-27 Qualified Product Lists.

Our expertise in designing and manufacturing magnetic assemblies and custom magnetics has put our electronic components into the products of every major defense supplier, including Lockheed Martin, Raytheon, and Northrop Grumman. Our components are utilized in everything from avionics to tactical missiles—including laser seekers, heads-up displays (HUDs), radar, secure voice data communications systems, forward-looking infrared targeting systems (FLIRs), and missile control systems.

Product availability in military specifications MIL-PRF-27: Grades 4 (hermetically sealed), 5 (encapsulated), 6 (open construction) packaging.

400hz Power Transformers

Our 400 Hz transformers offer maximum power with a flexible design—perfect for power and control applications. They are used chiefly in the power supplies of all types of equipment, including instrumentation, welding, test equipment, communications, and navigation systems.

• 400 Hz Miniature Power Transformer — offers the maximum power available in the smallest package size. It comes in power ratings from 0.5 VA – 40 VA, and in weights from 0.4 oz. – 5.8 oz. The parts can be ordered to the MIL-PRF-27 Qualified Products List part number, or as a COTS version of the military product. * See COTS version
• 400 Hz Power Transformer — a standard epoxy encapsulated transformer, designed for inputs of 120V, 400 Hz, and secondary voltages up to 300V. These parts can be provided in single phase or 3-phase with tapewound toroids, E or C cores, or laminations. The parts can be ordered to the MIL-PRF-27 Qualified Products List for Military Programs, or as a commercial COTS part.
• 400 Hz Hermetically Sealed Power Transformer — our 400 Hz transformers can also be ordered in a hermetically sealed version.

400 Hz Miniature Power Transformers >

Three Phase Transformers

• 50 hz to 1600 hz
• Up to 600 volt class; 500 KVA max; 35 Kvrms max; 1000 amps max
• Hermetic sealed / Encapsulated / Open frame construction
• Through hole / Leadwires / custom
• -70°C through 220°C
• #48 awg through #5 twin plus litz and copper foil
• Toroidal / Strip wound cut cores / Laminations

High Frequency Planar Transformers

• SPT Series (up to 250W)
• Power Rating: Up to 250W
• Frequency Range: 100 KHz to 400 KHz
• Construction: IPC J-STD 001 Class 3 Soldering Compatibility
• Isolation (Primary to Secondary): 500 VRMS

Surface Mount Planar Transformers >

Transformers

• 50 hz to 250 Mhz
• Up to 150 KVA; convection cooled
• 20 kvms max / 100 amps max
• Hermetic sealed / Encapsulated / Molded / Open construction
• Through hole / Leadwires / Surface mount / Solder lugs / custom
• -70°C through 220°C
• #48 awg through #5 twin plus litz and copper foil
• Toroidal / Strip wound cut cores / Laminations / Various ferrite configurations

Inductors/Chokes

• 50 hz to 250 Mhz
• Hermetic sealed / Encapsulated / Molded / Open construction
• Through hole / Leadwires / Surface mount / Solder lugs / custom
• -70°C through 220°C
• #48 awg through #8 plus litz and copper foil
• Toroidal / Strip wound cut cores / Laminations / Various ferrite configurations
• Single / three phase
• 100 amps max

Current Sense Inductors >
Switch Mode Inductors >
Common Mode Inductors >
Toroidal Power Inductors >
Low Loss Power Inductors >

Molded Inductors

• Nineteen different cores and five different sizes available for a wide range of inductance, current capability and frequency combinations.
• Wide range of inductances from .05 mH to 40 Hy in various sizes.
• Inductance tolerance of ±1%.
• Temperature range: -55°C to +200°C.
• Molded in glass filled polyester for rugged environmental protection including resistance to oils and hydraulic fluids.
• Average life expectancy of 20,000 hours at 130°C.
• Threaded or clear bushings available for mounting.
• Typical vibration capability per MIL-STD-202, Method 204, test condition D.
• Typical shock capability per MIL-STD-202, Method 213, test condition C (100 G’s).
• Extreme inductance stability over temperature.

Molded Inductors >

ATRUs (Auto Transformer Rectifier Units)

Power electronics play a lead role enabling the replacement of mechanical, pneumatic and hydraulic systems in contemporary, highly electric aircraft. This shift affects commercial and military aircraft development driven by the design and development of aircraft power electronics converters with reduced weight and highly efficient operation.

Auto-transformer rectifier units (ATRUs) provide simple, affordable, efficient, light-weight and reliable converters while meeting recent stringent power quality requirements. Torotel has experience with the application of ATRUs with both symmetric and asymmetric designs. Symmetric designs are already in use for a variety of alternating current/direct current applications. ATRU converters are currently utilized in low power appliance applications as passive filters for certain bridge rectifiers and will eventually be operational in non-regenerative motor drive and other three-phase AC/DC power conversion applications.

Although we continually expand our expertise and capability, Torotel’s current design and production capacity includes: 6, 12 and 18 pulse transformer rectifier units up to 30 KVA maximum.

Custom Assemblies

Torotel has remained an industry leader because our experienced staff consistently resolves clients’ toughest problems. We specialize in generating turnkey solutions for industrial, energy, aerospace, defense and avionics clients. Our products are built to meet your specifications and perform in all types of electronic systems.

Along with our precision production of inductors and transformers, we also assemble complex electromechanical assemblies requiring special enclosures. Clients come to bank on Torotel producing their non-core, labor-intensive assembly products.