5723 Design of Damping Mechanism for Nano-Motion Actuator

Sakurada, Akira; Furuya, Masato; Mori, Shigeki; Naganawa, Akihiro; Shibuya, Yotsugi; Obinata, Goro

doi:10.1299/jsmemecjo.2006.5.0_645

Cited by 1 publication

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“…A similar compressed air-cooling system was developed to form the encapsulation for a resin-coating PEA in [21], where the maximum operating frequency under 85 °C can achieve about 1000 Hz at a peak-to-peak voltage of 170 V in comparison with 50 Hz without the encapsulation of the cooling. In [22], a forced air-cooling device was presented for a stacked PEA, with which the maximum operating frequency under 85 °C can be increased from 230 Hz to 900 Hz at a peak-to-peak voltage of 150 V. Clearly, compared to natural cooling, by adding a heatsink and external forced air/water cooling, the temperature rise of the PEA can be significantly reduced and the PEA can operate under higher power conditions. However, due to the limitations of the cooling medium and the method, it is difficult to further improve the cooling effect using these solutions.…”

Section: Introductionmentioning

confidence: 99%

Liquid cooling of stacked piezoelectric actuators for high-power operation

2022

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In this article, we propose a liquid cooling solution to reduce the temperature rise and expand the working range of stacked piezoelectric actuators (PEAs) for high-frequency and large-stroke operation. Based on an analysis and preliminary testing of the power dissipation and temperature rise, a specific liquid cooling solution for a single PEA is designed and its effectiveness is verified through experiments. To incorporate liquid cooling into a high-bandwidth fast steering mirror (FSM) system driven by PEAs, a compact and self-contained cooling unit is proposed and evaluated. Subsequent experimental results validate its effectiveness, but also show some deficiencies for this cooling solution. To further improve the cooling efficiency, two new coolants are adopted based on an analysis of the heat transfer coefficient, and a suitable direct liquid cooling solution is established. Experimental results show that the cooled PEA can operate continuously over 8 kHz with a peak-to-peak voltage of 100 V whilst its maximum temperature is restricted to around 40 ○C using this cooling solution. The reliability and coolant insulation properties have been verified by a 3-month long continuously operational test.

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Section: Introductionmentioning

confidence: 99%