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piezoelectric transformer

A piezoelectric transformer and transformer technology, applied in the field of piezoelectric transformers, can solve problems such as increased loss of piezoelectric elements

Active Publication Date: 2021-11-09
EPCOS AG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, outside the maximum efficiency range, the losses in the piezoelectric element also increase

Method used

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Embodiment Construction

[0038] figure 1 has been discussed in detail above, and similarly, according to Figure 5 The equivalent circuit diagram of the piezoelectric transformer is also discussed in detail above.

[0039] figure 2 A schematic diagram showing the layer structure of parts of a piezoelectric transformer according to the prior art. The transformer includes a piezoelectric element 1 having a predetermined length dimension of length L defined from the left side (length=0) to the right side (length=L). The piezoelectric element 1 has an input side 2 and an output side 3 . The outer end of output side 3 can be metallized, for example, and form an output electrode. The input side 2 extends on the left side of the piezoelectric element 1 in the range of 0 to 1 / 2L of the length dimension. The output side 3 extends in the range of 1 / 2L to L of the length dimension on the right side of the piezoelectric element 1 .

[0040] The piezoelectric element 1 is constructed in a multi-layer constr...

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Abstract

The invention relates to a piezoelectric transformer comprising a piezoelectric element (1) of length L, wherein an input voltage U can be applied to the input side (2) in To be converted to the output voltage U on the output side (3) according to the transformation ratio formula (1) out . The piezoelectric element (1) has a plurality of layers (4a, 4b, 4c) of internal electrodes, which are arranged in a plurality of different layers (S1, S2, S3). Each ply (4a, 4b, 4c) of the internal electrode extends along at least one predetermined subsection of a predetermined length, wherein subsections of plies (4a, 4c) of the first set of layers (S1, S3) and the subsections of the plies (4b) of the second set of layers (S2) have different dimensions such that the piezoelectric transformer satisfies the following condition: C in ≤N 2 C out , where C in Indicates the input capacitance, C out denotes the output capacitance, and N denotes the transformation ratio of the ideal transformer.

Description

technical field [0001] The invention relates to a piezoelectric transformer comprising a piezoelectric element having a predetermined length dimension of length L along which at least one input side and at least one output side of the transformer are defined. The input voltage U can be applied on the input side in , according to the transformation ratio U out / U in = K u Converted on the output side to the output voltage U out . The piezoelectric element here has a plurality of plies of internal electrodes which are arranged in a plurality of different layers along a direction which is perpendicular to the direction of the length dimension. Background technique [0002] Such piezoelectric transformers are often used for voltage conversion. The impedance of such a piezotransformer is reached at a particular resonant frequency when the load on the output side corresponds to the impedance of the output capacitance of the piezotransformer (capacitance between the area of ​...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L41/047H01L41/107H10N30/87H10N30/04H10N30/045H10N30/06H10N30/40H10N30/50H10N30/80
CPCH10N30/871H10N30/40H10N30/045H10N30/06H10N30/50H10N30/804
Inventor 迈克尔·韦尔古尼弗朗茨·林纳
Owner EPCOS AG
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