Magnetic Noise Experiment with a Tuning Fork: Constant Frequency
This simple experimental setup illustrates the phenomenon of electromagnetic acoustic noise and vibrations - also called electromagnetically-excited noise, e-NVH or electrical noise - occurring in electrical systems such as rotating machines (e.g. permanent magnet synchronous machine, induction machines) or passive components (e.g. inductors). A coil powered by a fixed frequency AC current is put around a Tuning Fork prong. The current source create an AC flux density flowing in the magnetic circuit and the airgap created by the two iron prongs. Maxwell forces attract the two fork tips (equivalent magnetic dipole) similarly to what happens between the opposite polarities of North and South magnets. This magnetic force creates a vibration of the tuning fork prongs at twice the current frequency because magnetic force is proportional to the square of the flux density. The fork tips behave like an acoustic linear quadrupole. A strong tonal noise is created without any mechanical contact between excitation coig and tuning fork, illustrating the origin of the whining noise of electric motors. ©Eomys Engineering 2017 -- http://www.eomys.com #EOMY'SENGINEERING #PhysicsDemos #onestx #brian50g #OfficePlayground #MarkRober #TED #GrandIllusions #FlinnScientific #TopViralTalent #SugiKokor #BBC #TheSlowMoGuys #luikreig #VideoAdvice #adminofthissite #J.PLaplante #Space(Official) #MELChemistry #CuriousWorld #KidsFunScience #AmazingScience #KurtesBaute #ScienceBeyond #10MinutesofQualityTime #RhettAlain #Sciencelion #YOHAIBARDA #ConnorDunwoodie #KatrinaKahler #StudyAnimated ❣️Subscribe For More New Videos 💖 Thanks For Watching 😍🙂🤗 Disclaimer--Copyright Disclaimer Under Section 107 of the Copyright Act 1976, allowance is made for "fair use" for purposes such as criticism, comment, news reporting, teaching, scholarship, and research. Fair use is a use permitted by copyright statute that might otherwise be infringing. Non-profit, educational or personal use tips the balance in favor of fair use. PLEASE SUBSCRIBE, LIKE AND SHARE MS ZYRELLE -
