Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei, Anhui, People’s Republic of China.
IEEE Trans Ultrason Ferroelectr Freq Control. 2012 Jan;59(1):73-81. doi: 10.1109/TUFFC.2012.2157.
Based on contact heat transfer, a novel method to increase power density of piezoelectric transformers is proposed. A heat transfer structure is realized by directly attaching a dissipater to the piezoelectric transformer plate. By maintaining the vibration mode of the transformer and limiting additional energy losses from the contact interface, an appropriate design can improve power density of the transformer on a large scale, resulting from effective suppression of its working temperature rise. A prototype device was fabricated from a rectangular piezoelectric transformer, a copper heat transfer sheet, a thermal grease insulation pad, and an aluminum heat radiator. The experimental results show the transformer maintains a maximum power density of 135 W/cm(3) and an efficiency of 90.8% with a temperature rise of less than 10 °C after more than 36 h, without notable changes in performance.
基于接触热传递，提出了一种提高压电变压器功率密度的新方法。通过直接将耗散器附着在压电变压器板上来实现热传递结构。通过保持变压器的振动模式并限制接触界面的额外能量损失，可以通过有效抑制其工作温升来大规模提高变压器的功率密度。从一个矩形压电变压器、一个铜散热片、一个热油脂绝缘垫和一个铝散热器制造了一个原型装置。实验结果表明，在超过 36 小时后，该变压器的最大功率密度为 135 W/cm3，效率为 90.8%，温升小于 10°C，性能没有明显变化。
