Providing of Rod Piezoceramic Electroacoustic Transducers Thermal Mode Operation

Perchevska, Liudmyla; Drozdenko, Oleksandr Ivanovych; Drozdenko, Kateryna; Leiko, Oleksandr

doi:10.20535/2523-4455.2019.24.5.190452

Cited by 1 publication

(1 citation statement)

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“…An analytical calculation of the thermal field of a rod transducer can be obtained by solving the Fourier thermal conductivity equation, replacing the PET components with a system of layers. This option is suitable for a rough estimate of the heating temperature of the transducer and quite accurately coincides with the simulation results for rod and cylindrical transducers excluding the housing [27,28]. But the analytical calculation is difficult to take into account the housing, due to the impossibility of replacing the volume of the cavity in the housing with an infinite layer.…”

Section: Methods Of Researchsupporting

confidence: 61%

Study of the influence of the housing on the cooling efficiency of the piezoceramic electroacoustic Langevin-type transducer

Pershevska¹,

Drozdenko²,

Drozdenko³

et al. 2021

TAPR

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The object of research is thermal processes in Langevin-type piezoceramic electroacoustic transducers (PET), taking into account the housing. The piezoceramic electroacoustic transducers heat up during operation. Overheating of the converter leads to negative consequences, accompanied by a change in the parameters, characteristics of the device, as well as the failure of the converter. Or limitation on the duration and mode of operation, output power, current, amplitude and speed of oscillation of the converter. The paper investigates the effect of the housing on the temperature field of a Langevin-type PET by the finite element method, using modeling in SolidWorks. The results of temperature reduction of such cooling methods are shown: – filling the housing cavity with electrical insulating liquid, gas, a mixture of thermal paste; – use of holes in the housing; – changing the shape of the rear cover to have radiator side fins, vertical radiator fins, cylindrical radiator fins; – heat-resistant layer; – use of active air cooling at three different speeds. The most efficient 53 % and a uniform temperature field were found when filling with a mixture of thermal paste, but this solution is accompanied by additional experiments and a preparatory stage with the mixture. The cooling efficiency of 47 % was provided by active cooling – blowing with air, and this method requires additional equipment. Filling with insulating liquid gave a cooling efficiency of 27 % – an optimal result that does not require expensive investments. Slow blowing of the housing or adding only holes resulted in a decrease in the maximum heating temperature from 10 to 20 %, therefore, if the PET design allows the presence of holes, then it is necessary to rationally place them. Changing the shape of the back plate, heat-absorbing element, filling the housing with gas gave an efficiency decrease in the maximum temperature by 6–8 % compared to a closed housing with air. The research results make it possible to choose the optimal option for reducing the heating temperature of the Langevin-type PET to increase its efficiency and long-term trouble-free operation.

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Section: Methods Of Researchsupporting

confidence: 61%