Nanocrystalline Core: Properties, Applications & Selection Guide
Nanocrystalline magnetic cores have become the material of choice for high-efficiency transformers, common mode chokes and current sensors where ferrite is too lossy and silicon steel is too large. With permeability up to 100,000, core loss 5–10x lower than ferrite, and saturation flux density of 1.2 T, nanocrystalline cores deliver the best balance of size, […]
Coupled Inductor Design for Multiphase Buck Converters
Coupled inductors are the secret weapon of high-current multiphase voltage regulators (VRMs) used in CPUs, GPUs, FPGAs and AI accelerator power delivery. By magnetically coupling the phases, designers achieve faster transient response, smaller overall size and lower output ripple compared with using separate inductors per phase. This guide explains how coupled inductors work, the role […]
PCB Current Transformer: Working Principle, Design & Selection Guide
PCB mount current transformers (CTs) are compact, low-cost current sensors used in power supplies, motor drives, battery management systems and metering. Unlike hall-effect sensors, passive CTs require no external power and provide galvanic isolation between the measured circuit and the control board. This guide covers how PCB CTs work, key design parameters (turns ratio, burden […]
Low Frequency Transformer: Working Principle, Design & Material Selection
Low frequency transformers operating at 50 Hz or 60 Hz mains frequency remain the backbone of power distribution, industrial equipment and isolation applications. Despite the shift toward high-frequency switch-mode power conversion, line-frequency transformers are still required for galvanic isolation, voltage step-up/down, and where high reliability and simple construction matter. This guide explains how low frequency […]
Common Mode Choke Design: Core Selection, Winding & EMI Filtering Guide
Common mode chokes (CMCs) are the first line of defense against conducted EMI in switching power supplies, motor drives, EV chargers and industrial inverters. Pick the wrong core material or winding arrangement, and the choke either saturates under differential current or fails to suppress noise in the 100 kHz–30 MHz band. This guide covers how […]
Planar Magnetics Design: Core Selection, Winding Layout & Thermal Guide
Planar magnetics have moved from a niche telecom component to the default choice for high-frequency, high-power-density converters in EV charging, server power and industrial supplies. The reason is simple: flat PCB windings and low-profile ferrite cores cut height by 50–70% compared to wire-wound toroids, while improving thermal performance and repeatability. But planar transformers and inductors […]
Magnetic Core Selection for High-Frequency Transformers: Materials, Loss & Design Guide
The magnetic core is the single component that determines whether a high-frequency transformer can hit its efficiency target, survive thermal limits, and fit the enclosure. Choose the wrong material and you either leave 2–3 points of efficiency on the table or watch core loss push the temperature past 105°C. Choose the right core for the […]
Ni-Zn Ferrite Material Guide: Low-Loss Properties, Grades & Selection
“\n\n Ni-Zn Ferrite Material Guide: Low-Loss Properties, Grades & Selection \n\n Complete guide to Ni-Zn ferrite materials for high-frequency magnetic components — intrinsic properties, material grades, loss behavior, core selection, and applications from EMI suppression to power electronics. Written by Shaanxi SiRui Technology Co., Ltd, a professional manufacturer of Ni-Zn ferrite cores and magnetic components. […]
High Current Common Mode Choke Design for EV and PV Applications
“\n\n High Current Common Mode Choke Design for EV and PV Applications \n\n Engineering guide to designing high-current common mode chokes for electric vehicle and photovoltaic power electronics — core material selection, winding topology, key parameters, worked design examples, and OEM guidance. By Shaanxi SiRui Technology Co., Ltd, a professional manufacturer of common mode chokes […]
Miniature Current Transformer Design Guide: Core Selection for PCB Current Sensing
“\n\n Miniature Current Transformer Design Guide: Core Selection for PCB Current Sensing \n\n Practical engineering guide to designing miniature (PCB-mount) current transformers — core material selection, accuracy classes, burden matching, design equations, and applications. Written by Shaanxi SiRui Technology Co., Ltd, a professional manufacturer of current transformers and magnetic cores. \n\n What Is a Miniature […]