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SMTnet Express, November 7, 2019, Subscribers: 32,325, Companies: 10,919, Users: 25,284

Technical Library

Origin and Quantification of Increased Core Loss in MnZn Ferrite Plates of a Multi-Gap Inductor

Credits: Power Electronic Systems Laboratory (PES)

Inductors realized with high permeable MnZn ferrite require, unlike iron-powder cores with an inherent dis-tributed gap, a discrete air gap in the magnetic circuit to prevent saturation of the core material and/or tune the inductance value. This large discrete gap can be divided into several partial gaps in order to reduce the air gap stray field and consequently the proximity losses in the winding. The multi-gap core, realized by stacking several thin ferrite plates and inserting a non-magnetic spacer material between the plates, however, exhibits a substan-tial increase in core losses which cannot be explained from the intrinsic properties of the ferrite. In this paper, a comprehensive overview of the scientific literature regarding machining induced core losses in ferrite, dating back to the early 1970s, is provided which suggests that the observed excess core losses could be attributed to a deterioration of ferrite properties in the surface layer of the plates caused by mechanical stress exerted during machining...

Forum search results for related keywords: inductors, air gap.

SMT / PCB Products

PCB ASSEMBLY

Dispensing

GPD Global

Solder Materials

Qualitek

Hand Assembly

Virtual Industries

Productronica
Hall A4 Booth 114

Coating

Nordson Asymtek

Productronica
Hall A2 Booth 345
Hall A2 Booth 445

Reflow

Heller

Productronica
Hall A2 Booth 461
Hall A1 Booth 305

PCB CLEANING

Cleaning

Seika Machinery

Productronica
Hall A1 Booth 131

Cleaning

ZESTRON

Cleaning Agents

Kyzen

Productronica
Hall A4 Booth 465

PCB INSPECTION

PCB REWORK

PCB SOFTWARE

Inspection

Mirtec

Productronica
Hall A2 Booth 413

Solder Paste Stencils

BEST, Inc.

Software

Unisoft

Electronic Equipment Mart

Panasonic RL-131 Radial Lead Inserter

THT Equipment

Robo-Tek

USI Ultra-Coat Prism 350 Conformal Coater

Coating and Encapsulation

IBE SMT Equipment

DEK 03i Screen Printer

Screen Printers

Capital Equipment Exchange

Camalot, MPM, Quad Parts

Pick and Place/Feeders

PPM Parts

Universal Instruments 6380H

Through Hole Equipment

KD Electronics Ltd.

Juki FX-3RL

Chipshooters / Chip Mounters

Qinyi Electronics Co.,Ltd

Productronica
Hall A2 Booth 104

Events Calendar

San Diego Expo & Tech Forum | November 5 | SMTA

IPC Electronics Materials Forum 2019 | November 5 - 7 | IPC

PCB Cleaning Webinar Series | ZESTRON Corporation

Training Courses

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Career Center

Field Service Engineer

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Pitman, NJ | ESSEMTEC USA

Field Service Engineer

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Buford, GA | Seika Machinery

SMT Process Engineer (Starlink)

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Hawthorne, CA | SpaceX

Industry Associations Events

SMTA

SMTA - Surface Mount Technology Association is a non-profit international association of companies and individuals (totalling 4,000) involved in all aspects of advanced electronics assembly, surface mount and related technologies.

Membership Info | SMTA Certification | Bookstore | Upcoming Events

IPC

IPC - Association Connecting Electronics Industries is a US-based trade association dedicated to the competitive excellence and financial success of its nearly 2,600 member companies which represent all facets of the electronic interconnection industry, including design, printed wiring board manufacturing and electronics assembly.

Membership Info | Training & Certification | Online Store | Upcoming Events

Technical Editor - Davef (submit your technical articles)

Newsletter Editor - Anna Girouard

SMTnet.com, 98 Elm Street, Portland, Maine 04101 USA, Tel.207-780-0887.

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Used PCB Assembly Equipment - CE Exchange

Zestron PCB Cleaning Academy

ELEVATE THE EXCELLENCE OF ELECTRONICS - Plan now to be in San Diego for IPC APEX EXPO 2020

Unused Equipment? - let BajaBid turn your EXCESS ASSETS into cash!

Kyzen Free PCB Cleaning Audit

A turn-key conformal coating solution with single supplier support for the entire line.

Hioki 1240 Flying Probe Tester - ultra-high speed measuring, fine pitch inspection.

HELLER - Choose an Oven for Your Reflow Needs

NEW Fully featured benchtop dispenser - GPD Global

Vacuum Tweezers - pick up small components with ease

Used SMT Equipment - IBE

Quality Pre-Owned SMT Eequipment - Robo-Tek

SMT Parts Store Online - MPM, Camalot, Quad, Mirae - nozzles, feeders, accessories.

Nitrogen Capable SMD & BGA Rework Station

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