Transcription of UNDERSTANDING AND CONTROLLING COMMON-MODE …
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UNDERSTANDING AND CONTROLLING COMMON-MODE …
Henry W. OttHOCELECTROMAGNETICCOMPATIBILITY2001 ByHenry W. OttHenry Ott ConsultantsLivingston, NJ 07039(973) AND CONTROLLINGCOMMON-MODE EMISSIONSIN HIGH-POWER ELECTRONICSPage 1 Henry W. OttHOCELECTROMAGNETICCOMPATIBILITYTHE BASIC PROBLEM!Switching Power Supplies and Variable Speed Motor DrivesProduce Large Noise Currents Which are Conducted Out tothe Load, as Well as Conducted Back to The Power Source!These COMMON-MODE Noise Currents are the Cause of: Low Frequency Conducted Emission, and High Frequency Radiated Emission!
©Henry W. Ott HOC ELECTROMAGNETIC COMPATIBILITY COMMON-MODE & DIFFERENTIAL MODE NOISE! Differential-Mode Noise — Involves the Normal Operation of the Circuit — Currents Flowing Around Loops — Is Documented • Schematics • PCB Layout • Wiring Diagrams — Is Easy to Understand Common-Mode Noise
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