Ferrite Core Transformer Design Guide: Core Selection, Material & Winding Design
“\n\n Ferrite Core Transformer Design Guide: Core Selection, Material Properties & Winding Design \n\n Complete engineering guide to designing transformers with ferrite cores — material selection, core shapes, design equations, winding rules, and practical applications. Written by Shaanxi SiRui Technology Co., Ltd, a professional manufacturer of ferrite magnetic cores and custom magnetic components. \n\n What […]
High Flux Core vs Sendust: DC Bias Comparison
Sendust and High Flux are the two most popular powder cores for DC/DC power inductors. Here is how they differ in composition, DC bias, core loss and cost — and how to pick between them. Introduction When your buck converter needs a powder core, the choice usually comes down to two materials: Sendust (Kool Mμ) […]
Core Loss Calculation: Steinmetz Equation in Practice
Core loss is the dominant loss mechanism in high-frequency magnetics. Here is how to calculate it with the Steinmetz equation, where to get the coefficients, and a worked example comparing ferrite and powder cores. Introduction When a magnetic component operates at 100 kHz or higher, core loss usually exceeds copper loss. Get it wrong and […]
Ferrite Core vs Powder Core: Which One for Your Inductor?
Ferrite cores and powder cores are the two dominant core families for power inductors. Here is how they differ in permeability, DC bias, core loss and cost — and how to choose the right one for your design. Introduction Almost every power inductor you will ever design starts with the same question: ferrite core or […]
Magnetic Shielding Design Guide: Materials, Techniques & Applications
How to shield against magnetic interference—from low-frequency magnetic fields to high-frequency EMI, and choosing the right shielding material Introduction Magnetic interference is one of the most common—and most frustrating—EMI problems. Unlike electric fields, magnetic fields penetrate most materials easily. A piece of aluminum or copper does almost nothing to block low-frequency magnetic fields. Shaanxi SiRui […]
Buck Converter Inductor Design Guide: Selection, Calculations & Core Materials
How to choose and design inductors for step-down DC/DC converters—from low-power POL to high-current point-of-load regulators Introduction The buck (step-down) converter is the most widely used DC/DC topology in the world. The inductor is the heart of every buck converter—its value directly determines output ripple, transient response, efficiency, and size. Shaanxi SiRui Technology Co., Ltd. […]
LLC Resonant Converter Magnetic Design: Resonant Inductor, Transformer & Cores
How to design magnetic components for LLC resonant converters—resonant tank, transformer design, and core material selection Introduction The LLC resonant converter is the dominant topology for high-efficiency isolated DC/DC power conversion. Youll find it in EV on-board chargers, server power supplies, solar microinverters, and industrial DC/DC modules. Its performance depends entirely on its magnetic components—the […]
Gate Drive Transformer Design Guide: IGBT, SiC MOSFET & Isolated Drives
How to design pulse transformers for gate drive applications—core selection, isolation requirements, and design best practices Introduction Gate drive transformers transfer isolated gate drive signals from the control circuit to high-side power switches—IGBTs, MOSFETs, SiC devices, and GaN transistors. As SiC and GaN push switching speeds higher, gate drive transformer requirements are getting stricter. Shaanxi […]
Motor Drive EMI Filter Design Guide: VFD, Servo & Industrial Drives
How to design input EMI filters for variable frequency drives, servo amplifiers, and motor control systems to meet EMC standards Introduction Variable frequency drives (VFDs) and servo amplifiers are some of the noisiest pieces of industrial equipment. Fast-switching IGBTs generate high dV/dt edges, common mode currents through motor parasitic capacitance, and conducted EMI across a […]
Current Sensor Comparison: CT vs Rogowski vs Hall Effect
How to choose the right current measurement technology for your application—accuracy, bandwidth, cost, and isolation Introduction Current measurement is everywhere: power supplies, motor drives, EV chargers, industrial automation, energy metering. Three dominant technologies: Current Transformer (CT), Rogowski Coil, and Hall Effect Sensor. Shaanxi SiRui Technology Co., Ltd. supplies magnetic cores for current sensor applications. 1. […]