Every power design that needs to measure current chooses between three fundamentally different technologies — and the choice is a manufacturing decision as much as an electrical one. Current transformers, shunt resistors and Hall-effect sensors each demand a different winding, isolation barrier and test regime from the people building them. A decision guide for getting the RFQ right the first time.
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High-Frequency and Planar Magnetics for EV Onboard Chargers and DC-DC Converters
The resonant transformer inside an 11-22 kW EV onboard charger runs at hundreds of kilohertz, and it decides more than any other single component whether the charger ends up small, cool and efficient – or none of those. This article walks through the shift from wire-wound to planar PCB-integrated magnetics: why higher switching frequency shrinks the core, which materials survive 200-500 kHz, how interleaved windings tame leakage inductance, and the manufacturing tolerances that separate a working design from a hot one.
Laminated, Toroidal, or Ferrite: Choosing a Transformer Core
A practical primer on choosing between laminated silicon-steel, toroidal, and ferrite transformer cores by frequency, power, size, and EMI.