公开(公告)号：US5278471A

公开(公告)日：1994-01-11

申请号：US940024

申请日：1992-09-03

申请人： Kaneo Uehara ,  Takeshi Inoue ,  Akio Iwamoto ,  Osamu Ohnishi ,  Yasuhiro Sasaki

发明人： Kaneo Uehara ,  Takeshi Inoue ,  Akio Iwamoto ,  Osamu Ohnishi ,  Yasuhiro Sasaki

IPC分类号： H01L41/107 ,  H01L41/08

CPC分类号： H01L41/107

摘要： A piezoelectric ceramic transformer includes a high impedance portion having internal electrode layers which are opposite each other in a thickness direction in a radial central portion of a piezoelectric ceramic disc; an annular insulating portion disposed externally of the high impedance portion and having no electrode; and a low impedance portion disposed externally of the annular insulating portion and having annular internal electrode layers which are opposite each other in a thickness direction, the internal electrode layers of the high impedance portion being exposed on the side end face of the piezoelectric ceramic disc at respective ends thereof without being in contact with the annular internal electrode layer of the low impedance portion and being alternately connected on the side end face with external electrodes, each of which is connected with an electric terminal, and the internal electrode layers of the low impedance portion being exposed on the side end face of the piezoelectric ceramic disc at respective ends thereof and being alternately connected on the side end face with external electrodes, each of which is connected with an electric terminal. The transformer is operable in a high frequency band and can be used for an onboard power supply.

摘要翻译： 压电陶瓷变压器包括具有在压电陶瓷盘的径向中心部分中沿厚度方向彼此相对的内部电极层的高阻抗部分; 设置在高阻抗部分外部并且不具有电极的环形绝缘部分; 以及低阻抗部，其设置在所述环状绝缘部的外侧，并且具有在厚度方向上相对的环状内部电极层，所述高阻抗部的内部电极层露出在所述压电陶瓷盘的侧端面 其端部不与低阻抗部分的环形内部电极层接触，并且在侧端面上交替地连接有与电端子连接的外部电极，并且低阻抗的内部电极层 部分露出在压电陶瓷盘的各个端部的侧端面上，并且在侧端面上交替地与外部电极连接，每个外部电极与电气端子连接。 变压器可在高频段工作，可用于车载电源。

公开(公告)号：US5241236A

公开(公告)日：1993-08-31

申请号：US861436

申请日：1992-04-01

申请人： Yasuhiro Sasaki ,  Kaneo Uehara ,  Takeshi Inoue

发明人： Yasuhiro Sasaki ,  Kaneo Uehara ,  Takeshi Inoue

IPC分类号： H01F30/00 ,  H01L41/083 ,  H01L41/107

CPC分类号： H01L41/107

摘要： A piezoelectric ceramic transformer comprises a low impedance portion 11 including a plurality of piezoelectric ceramic layers 111 to 115 having different thicknesses, a high impedance portion 12 and internal electrodes 16. The low and high impedance portions 11 and 12 are subjected to a uniform polarization treatment in a thickness direction and with the same vector of polarization. The low impedance portion 11 includes one or more piezoelectric ceramic layers having a thickness different from those of the other layers therein. No delamination of electrodes or breaking of ceramics occur upon polarization treatment. Therefore, a compact piezoelectric ceramic transformer for power source which has a high mechanical quality coefficient Qm and a high electric power transmission efficiency is provided.

摘要翻译： 压电陶瓷变压器包括具有不同厚度的多个压电陶瓷层111至115的低阻抗部分11，高阻抗部分12和内部电极16.低阻抗部分和高阻抗部分11和12经受均匀的极化处理 在厚度方向和相同的极化矢量。 低阻抗部分11包括具有与其中其它层的厚度不同的厚度的一个或多个压电陶瓷层。 极化处理后不会发生电极分层或陶瓷破裂。 因此，提供了具有高机械质量系数Qm和高电力传输效率的用于电源的紧凑型压电陶瓷变压器。

公开(公告)号：US5237239A

公开(公告)日：1993-08-17

申请号：US772333

申请日：1991-10-07

申请人： Yoshiki Inoue ,  Kaneo Uehara ,  Atsushi Ochi

发明人： Yoshiki Inoue ,  Kaneo Uehara ,  Atsushi Ochi

IPC分类号： H01L41/083

CPC分类号： H01L41/0838

摘要： In a piezoelectric actuator of the type which has a plurality of grooves on the outer side surface of the actuator body, mechanical reliability of the actuator is enhanced by providing grooves also in the respective layers of a material exhibiting electrostrictive effect located over and below the top and the bottom ends of the actuator. Moreover, a further improvement of mechanical strength can be attained by providing additional grooves onto the outer most grooves.