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Coil Arrangement for Use With Ultrasonic Resonators

IP.com Disclosure Number: IPCOM000095074D
Original Publication Date: 1965-Sep-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Preisinger, M: AUTHOR

Abstract

Magnetostrictive resonators are excited into mechanical oscillations by a coil surrounding them. That causes the production of heat due to energy losses in the resonator. For dissipating such heat, radiation cooling is frequently insufficient and cooling by a liquid or air flow is required. In case of liquid cooling, an undefined coupling of the coil to the resonator is established due to viscosity. In case of air cooling, the heat can be dissipated substantially only at the coil surface as the coil covers the resonator. In order to avoid these disadvantages, the coil is fixedly coupled with the resonator mechanically such as by cementing with a suitable adhesive. This measure merely results in a change in the characteristic impedance of the resonator.

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Coil Arrangement for Use With Ultrasonic Resonators

Magnetostrictive resonators are excited into mechanical oscillations by a coil surrounding them. That causes the production of heat due to energy losses in the resonator. For dissipating such heat, radiation cooling is frequently insufficient and cooling by a liquid or air flow is required. In case of liquid cooling, an undefined coupling of the coil to the resonator is established due to viscosity. In case of air cooling, the heat can be dissipated substantially only at the coil surface as the coil covers the resonator. In order to avoid these disadvantages, the coil is fixedly coupled with the resonator mechanically such as by cementing with a suitable adhesive. This measure merely results in a change in the characteristic impedance of the resonator.

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