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Electronic Craftsmen has been designing and building Switch Mode Power Supplies for over 20 years. Understanding SMPS fundamentals is critical in optimizing transformer design to achieve:
Example Types of Switch Mode Transformers:
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20kW Switching Transformer for DC-DC Converter operating at 20-40kHz (EC Custom Model 215027)
Nominal Power: 20kW
Switching Frequency: 20kHz (can also operate at 40kHz)
Primary-secondary ration: 7:5 (1.4:1)
Primary voltage: 720V
Nominal output current: 60A
Approx. dim: 2.75”W x 4.25”H x 5.50”D
Approx. weight: 10Lbs
Application: Custom Test & Measurement Equipment
Electronic Craftsmen Custom Transformer Model 215027
Switching Flyback Transformer, 200kHz, 60W, discontinuous mode
Copper Foil Input winding; 7x34AWG output and 41AWG HV output. EER35 Core (PC44), Class B (130C) insulation system.
High Voltage Switching Transformer, 36.5kVA @ 25kHz
Model 215006. Designed for HV laboratory application. Input 5kV @ 400A; Resonant output 60kV @ 200A with 60kVdc isolation with 100ms on / 5 mins off time. Epoxy encapsulated Litz wire coils assembled on Ferrite Cores.
Custom built for your application, assembled with care and precision.
Switch Mode / High Frequency / Ferrite Custom Transformer Capabilities at Electronic Craftsmen
Power: From mW to 200kVA @ 20kHz (typical)
Working Voltage up to 12kV (depending on frequency); multiple stages possible for higher outputs
Frequency: To 500kHz (typical)
Temperature Class to 220C (155C / Class F typical)
Weight: 0.06 oz / 1g to 550 lbs / 250kg
Multiple taps as required
Dielectric Strength (hipot) to 30kVac or 20kVdc
Parts can be vacuum varnished or molded with a variety of hard or soft encapsulant materials with thermal conductivity.
Wire sizes from 1-45 AWG or Copper Foil to 0.050in thick (in multiple layers for higher current); Litz wire for higher frequency
Regulation to specification
Manufactured using all known state-of-the-art magnetic core materials, including but not limited to electrical grade steel laminations, ferrites & powdered iron, nickel-iron alloy, iron amorphous metal strip-wound cores, nanocrystalline cores and small toroids.
Antifungal and non-nutrient coatings available
Corrosion resistant coatings & platings available
Standard or custom terminations & leads
Mounting Configurations: pcb-mount (horizontal or vertical), custom or standard brackets or stacked configurations
Designed to meet CSA & UL (safety) or MIL PRF 27 (aerospace / military) requirements upon request
MIL PRF 27 Grade 5 & 6 encapsulation available