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Radial vibration piezoelectric transformer and preparation method thereof

A piezoelectric transformer and radial vibration technology, applied in the field of piezoelectric transformers, can solve the problems of not considering how to eliminate, not taking into account the influence of the driving voltage waveform on the depolarization of the primary monolith, and increasing the loss of the transformer, so as to reduce the Insulation coating, the effect of eliminating heat generation and reducing insulation loss

Inactive Publication Date: 2010-02-10
中陶久源(北京)电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]A spacer is used between the primary and secondary, and the sides of the primary and secondary are covered with insulation. They form a complete insulation combination, and the primary (or Secondary) is encapsulated as a whole, although it has reached a specific safety standard, but it has greatly increased the loss of the transformer. In addition, it has not considered how to eliminate the pressure difference between the primary and secondary sheets on both sides of the isolation sheet, resulting in The impact of the leakage current loss between the primary and secondary, not to mention the impact of the driving voltage waveform on the depolarization of the primary single chip

Method used

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  • Radial vibration piezoelectric transformer and preparation method thereof
  • Radial vibration piezoelectric transformer and preparation method thereof
  • Radial vibration piezoelectric transformer and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0051] The preparation method of a radial vibration piezoelectric transformer provided in this embodiment includes the following steps:

[0052] 1. Transformer structure

[0053] 1. Preparation method of circular (or regular polygonal) ceramic monolithic electrode

[0054] Take the preparation method of a circular ceramic monolithic electrode as an example.

[0055] 1.1 Class AB monolithic

[0056] As shown in Figure 2, it is a front view of a class AB monolithic sheet, and the upper and lower surfaces are A and B respectively. Divide the single piece into four quadrants I, II, III, and IV. The surface electrode on the A surface of the upper surface is concentric with the circular surface, and the radius is smaller than that of the A surface. There is a radial protrusion in the IV quadrant and a radial depression in the I quadrant. The irregular circles are formed by silver, such as image 3 As shown; the B side of the lower surface is opposite to the A side, the radial co...

Embodiment 2

[0164] The design requirements for the piezoelectric transformer required in this embodiment are as follows:

[0165] Input voltage V 1 =140V;

[0166] output voltage V 2 =10V;

[0167] Rated output power P=20W;

[0168] Rated load R=5Ω;

[0169] Working temperature -40°C-+50°C;

[0170] In the range of 0.4P-1P;

[0171] The input voltage and the input current are in the same phase or the phase difference is π;

[0172] Phase error <5°.

[0173] According to the preparation method of the radial vibration piezoelectric transformer provided by the present invention, the solution is as follows:

[0174] m 1 / m 2 = 1 / 14,k m =1, that is, the primary is composed of ceramic monoliths in series, and the secondary is composed of ceramic monoliths in parallel; Ka=2.18, when the radius of ceramic monoliths a=0.013m, the piezoelectric transformer wave number K=167; so ω=Kv=2π× 89×10 3 l / sec; δ=1.39, N=0.28; m 1 τ 1 / m 2 τ 2 =1.13; m 2 / τ 2 =6086l / m,τ 2 =0.00023m,τ 1 =...

Embodiment 3

[0183] The design requirements of the piezoelectric transformer in this embodiment are as follows:

[0184] Input voltage V 1 = 42.5V;

[0185] output voltage V 2 =85V;

[0186] Rated output power P=36W;

[0187] Rated load R=200Ω;

[0188] In the range of 130Ω-260Ω, without adjusting the working frequency;

[0189] Output power ≈P±5%P;

[0190] Constant current in the range of 0~40Ω, deviation <5%.

[0191] According to the preparation method of the radial vibration piezoelectric transformer provided by the present invention, the solution is as follows:

[0192] m 1 / m 2 = 2 / 1,k m =1, the primary is composed of ceramic monoliths in parallel, and the secondary is composed of ceramic monoliths in series; Ka=2.088, when a=0.0175m, K=119.3, so ω=2π×64.8×10 3 l / sec, δ=0.401; N=2.004×10 -3 ;m 1 τ 1 / m 2 τ 2 = 1, m 2 / τ 2 =333l / m;τ 2 =0.003m;τ 1 =0.0015m; m 1 = 2, m 2 = 1, a = 0.0175m; R i =1 / 5×R=40Ω; f=64.8KHz.

[0193] The characteristics of the prepared pi...

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Abstract

The invention relates to a radial vibration piezoelectric transformer and a preparation method thereof. The primary and the secondary of the piezoelectric transformer are formed by overlapping circular or regularly polygonal ceramic chips in series or in parallel; the surface electrodes of the piezoelectric transformer are in non-centrosymmetry; the side electrodes formed by coating silver from the convex part of each surface electrode to the edges of the chips along the side surface and coating the silver to the edges of the other surface are also in non-centrosymmetry; each chip is polarizedalong the overlapping direction; a spacer or no spacer exists between the primary and the secondary; and the side electrodes are coated with an insulating material. The piezoelectric transformer hasgood characteristics of constant current output, constant power output, input voltage and input current having the same phase or a phase difference pi and the like, improves the efficiency of the piezoelectric transformer to the maximum, reduces the loss of the piezoelectric transformer, and improves the reliability of the piezoelectric transformer by rationally matching the relationship between the structural parameters of the primary and the secondary and the load.

Description

technical field [0001] The invention relates to the technical field of piezoelectric transformers, in particular to a radial vibration piezoelectric transformer with an optimized structure and some special properties and a preparation method thereof. Background technique [0002] The radial vibration piezoelectric transformer is a new type of piezoelectric transformer under development. The outstanding advantage of this piezoelectric transformer is that it can realize low-voltage high-power output with a small size, and can be used in electronic rectifiers, adapters and power supplies. Taking the circular radial vibration mode transformer as an example, the previous radial vibration piezoelectric transformers have paid attention to the monolithic shape of the transformer, the multi-chip stacking method, the lead-out of electrodes, the composition of insulating components, etc., so that it can achieve output step-down Or boost the purpose, and achieve a certain technical perf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L41/107H01L41/02H01L41/22H10N30/40H10N30/071
Inventor 夏定豪
Owner 中陶久源(北京)电子科技有限公司
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