Magnetics Business & Technology - Summer 2018 - 19

RESEARCH & DEVELOPMENT
III.

COMMON MODE FILTER

Common-mode chokes (CMC) in theory are made up of a single
core with two identical coils which are wound around the core in
different directions. See Fig. 4

Fig. 7 CMC w/Differential Mode Current
On the other hand, if the currents enter the CMC in the same direction, the two magnetic fields are adding together to provide a
very large inductance or impedance, which will play a role in suppressing common mode noise. See Fig. 8

Fig. 4 Common Mode Choke

Fig. 8 CMC w/Common Mode Current

Fig. 5 CMC Electronic Symbol
It is primarily use to prevent electromagnetic interference (EMI) from
the power supply lines. This can help prevent electronic equipment
in an AC circuit from malfunctioning. CMC is in fact a bifunctional
filter: To filter out external common mode electromagnetic interference and to prevent sending out electromagnetic interference.

Fig. 6 CMC Samples

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Table of Contents for the Digital Edition of Magnetics Business & Technology - Summer 2018

Magnetics Business & Technology - Summer 2018
Contents
Editor’s Choice
Magnetic Nanoparticles Leap from Lab Bench to Breast Cancer Clinical Trials
Safran, a Major Player in Plasma Propulsion, Finds Booming Market for its Hall Eff ect Thrusters
NASA Develops Hall-Eff ect Electric Propulsion to Thrust Exploration on into Deep Space
Airbus-built SES-12 Dual-mission Satellite Successfully Launched
Research & Development
Case Study
Product News
Industry News
Marketplace/ Advertising Index
Spontaneous Thoughts: Dysprosium 2.0
Magnetics Business & Technology - Summer 2018 - Magnetics Business & Technology - Summer 2018
Magnetics Business & Technology - Summer 2018 - Cover2
Magnetics Business & Technology - Summer 2018 - Contents
Magnetics Business & Technology - Summer 2018 - Editor’s Choice
Magnetics Business & Technology - Summer 2018 - 5
Magnetics Business & Technology - Summer 2018 - Magnetic Nanoparticles Leap from Lab Bench to Breast Cancer Clinical Trials
Magnetics Business & Technology - Summer 2018 - 7
Magnetics Business & Technology - Summer 2018 - Safran, a Major Player in Plasma Propulsion, Finds Booming Market for its Hall Eff ect Thrusters
Magnetics Business & Technology - Summer 2018 - 9
Magnetics Business & Technology - Summer 2018 - NASA Develops Hall-Eff ect Electric Propulsion to Thrust Exploration on into Deep Space
Magnetics Business & Technology - Summer 2018 - 11
Magnetics Business & Technology - Summer 2018 - Airbus-built SES-12 Dual-mission Satellite Successfully Launched
Magnetics Business & Technology - Summer 2018 - 13
Magnetics Business & Technology - Summer 2018 - Research & Development
Magnetics Business & Technology - Summer 2018 - 15
Magnetics Business & Technology - Summer 2018 - 16
Magnetics Business & Technology - Summer 2018 - 17
Magnetics Business & Technology - Summer 2018 - 18
Magnetics Business & Technology - Summer 2018 - 19
Magnetics Business & Technology - Summer 2018 - 20
Magnetics Business & Technology - Summer 2018 - 21
Magnetics Business & Technology - Summer 2018 - 22
Magnetics Business & Technology - Summer 2018 - 23
Magnetics Business & Technology - Summer 2018 - Case Study
Magnetics Business & Technology - Summer 2018 - 25
Magnetics Business & Technology - Summer 2018 - 26
Magnetics Business & Technology - Summer 2018 - 27
Magnetics Business & Technology - Summer 2018 - Product News
Magnetics Business & Technology - Summer 2018 - 29
Magnetics Business & Technology - Summer 2018 - Industry News
Magnetics Business & Technology - Summer 2018 - 31
Magnetics Business & Technology - Summer 2018 - Marketplace/ Advertising Index
Magnetics Business & Technology - Summer 2018 - 33
Magnetics Business & Technology - Summer 2018 - Spontaneous Thoughts: Dysprosium 2.0
Magnetics Business & Technology - Summer 2018 - Cover3
Magnetics Business & Technology - Summer 2018 - Cover4
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