KR100293589B1 - Supporting device of piezo-transformer - Google Patents

Abstract

A support device for piezoelectric plates for obtaining a high efficiency output by supporting the piezoelectric plate in the width direction is proposed. The present invention, by inserting a plurality of cylindrical support rods in the vertical direction to the upper support plate formed with at least one groove and the lower support plate formed with a groove corresponding to the upper support plate in the vertical direction is input to the groove formed between the support rod and the adjacent support rod It is formed by sandwiching a piezoelectric plate having a terminal and an output terminal in the longitudinal direction. Therefore, it is possible to achieve effective connection between the input electrode and the input terminal by supporting the piezoelectric plate to be effective and reliable, and increase the output power by driving in parallel using a plurality of piezoelectric plates.

Description

Supporting device of piezoelectric transformer {Supporting device of piezo-transformer}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a support device for piezoelectric transformers, and more particularly, to a support device for piezoelectric transformers for obtaining a high efficiency output by supporting a piezoelectric plate in a width direction.

In recent years, various information and communication devices tend to be required to be compact, thin, and light. A power conversion circuit capable of supplying stable power is essential for information and communication devices, but inductors and transformers, which have been traditionally used in circuit construction, are becoming obstacles to miniaturization, thinness, and light weight. That is, in the case of a magnetic transformer, attempts to miniaturize while securing the required voltage amplification ratio, that is, the winding ratio are limited by the winding, the magnetic core, and the like. Piezoelectric transformers have been developed to satisfy the trend of such information communication devices.

A piezoelectric transformer is a device of the principle that the current on the input side (primary side) is transformed and output on the output (secondary) side while passing through the piezoelectric material. Therefore, the winding is unnecessary as compared with the conventional magnetic transformer, the structure is simple, miniaturized, thinned, and lightweight. In addition, there is no skin effect, which is advantageous for high frequency, it is not necessary to consider the electrical insulation between the first and second, and does not generate electromagnetic (electro-magnetic) noise, has the advantage that can be more efficient than the ferrite transformer.

In particular, in recent years, there have been attempts to employ piezoelectric transformers to reduce the size, thickness, weight, and low power consumption of the driving circuit of the rear light source of the liquid crystal display device mounted in various information communication devices.

1A and 1B are schematic diagrams for explaining a structure of a general piezoelectric transformer, and FIG. 2 shows a support node for showing displacement of a support point according to each vibration mode in the piezoelectric transformer of FIG. 1.

A number of methods have been provided for supporting a conventional piezoelectric transformer in a vibrating node, and various electrode shapes, polarization methods, etc. have been provided for improving the boost ratio and output power. As shown in FIG. 1, the conventional piezoelectric transformer is configured by using a single piezoelectric plate in various electrode shapes to drive or stacked. That is, in the case of FIG. 1A, one-wavelength and half-wavelength modes operate according to the supporting method. FIG. 1B illustrates a piezoelectric transformer that vibrates in a 3/2 wavelength mode consisting of two pairs of input terminals. As shown in FIGS. 1A and 1B, the conventional piezoelectric transformer converts a voltage by generating vibration in the piezoelectric plate 10 by the voltage input to the piezoelectric plate 10 and converting the generated vibration into an electrical signal at the output side. It is to let. In such a piezoelectric transformer, a support point subjected to strong stress determines the performance of the piezoelectric transformer and enables accurate frequency driving. 2 shows the supporting position in each vibration mode.

However, conventional piezoelectric transformers use a single piezoelectric plate to stack a single plate or a plurality of piezoelectric plates formed in various electrode shapes to increase the voltage raising ratio, but the output power is about 2-3W, which limits application. There is an extremely limited problem such as being used to drive LCD backlights of notebook computers.

The present invention has been invented to solve the above problems, it is possible to provide a plurality of piezoelectric transformers in one cartridge in the width direction to obtain a high output power through parallel drive, and the electrode of the piezoelectric plate It is an object of the present invention to provide a support device for piezoelectric transformers in which reliable support in which the input terminals are connected simultaneously at the vibration node can be achieved.

It is still another object of the present invention to provide a piezoelectric transformer supporting device which provides a plurality of inputs and outputs in one piezoelectric plate to obtain a high boost ratio and high output characteristics.

1A and 1B are schematic diagrams for explaining an operation principle of a general piezoelectric transformer.

FIG. 2 illustrates a support node for showing displacement of a support point according to each vibration mode in the piezoelectric transformer of FIG. 1.

3 is a perspective view for showing a supporting device of a piezoelectric transformer according to a first embodiment of the present invention.

4 is a wiring diagram illustrating a wiring state of a piezoelectric plate having one input / output terminal in the piezoelectric transformer of FIG. 3.

FIG. 5 is a wiring diagram illustrating a wiring state of a piezoelectric plate having a plurality of input / output terminals in the piezoelectric transformer of FIG. 3.

6 is a perspective view illustrating a method of supporting a piezoelectric transformer according to a second embodiment of the present invention.

7 is a perspective view illustrating a method of supporting a piezoelectric transformer according to a third embodiment of the present invention.

8 is a perspective view for showing an example used as a single element having a cover in the piezoelectric transformer according to the present invention.

<Explanation of symbols on the main parts of the drawing>

100: piezoelectric transformer 102: piezoelectric plate

104: common terminal 105: input terminal

107: output terminal 110: upper support plate

120: lower support plate 130: support rod

The present invention for achieving such an object,

At least one groove is formed in the groove formed between the support rod and the adjacent support rod by fitting a plurality of cylindrical rods in a vertical direction to the upper support plate and the lower support plate formed with a groove corresponding to the upper support plate in the vertical direction It is formed by sandwiching the piezoelectric plate in the longitudinal direction.

In addition, according to a preferred embodiment of the present invention, the piezoelectric plate is arranged in the longitudinal direction of the plurality of common terminals on the outer surface of the whole, in the longitudinal direction of the plurality of input terminals on the outer surface of the rear, a plurality of the outer surface of the top It is formed by arranging two output terminals.

According to the present invention, the piezoelectric plate can be supported to be effective and reliable to achieve an effective connection between the input electrode and the input terminal, and the output power can be increased by parallel driving using a plurality of piezoelectric plates.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of a method for supporting a piezoelectric transformer according to the present invention and an apparatus for performing the same.

3 is a perspective view illustrating a method of supporting a piezoelectric transformer according to a first embodiment of the present invention, and FIG. 4 illustrates a wiring state of a piezoelectric plate having one input / output terminal in the piezoelectric transformer of FIG. 3. 5 is a wiring diagram for illustrating a wiring state of a piezoelectric plate having a plurality of input / output terminals in the piezoelectric transformer of FIG. 3.

In addition, Figure 6 is a perspective view for showing a support device for a piezoelectric transformer according to a second embodiment of the present invention, Figure 7 is a perspective view for showing a support method of a piezoelectric transformer according to a third embodiment of the present invention, 8 is a perspective view for showing an example used as a single element having a cover in the piezoelectric transformer according to the present invention.

As shown in FIG. 3, the piezoelectric transformer 100 according to the present invention fits and supports a support rod 130 made of a cylindrical metal material or an insulating material to the upper support plate 110 and the lower support plate 120, and between the support rods 130. The piezoelectric plate 102 is constructed by standing in the width direction. That is, the support rod 130 made of metal or insulating material having a cylindrical shape is inserted into the upper support plate 110 and the lower support plate 120 formed to have a narrow area as much as possible so as to support the piezoelectric plate 102. To combine. The upper support plate 110, the lower support plate 120, and the support rod 130 are formed in the same structure by being spaced apart at regular intervals in the longitudinal direction of the piezoelectric plate 102 according to the support displacement of the piezoelectric plate 102. That is, a plurality of cylindrical support rods 130 are cylindrically fitted to the lower support plate 120 having grooves corresponding to the upper support plate 110 in the vertical direction, so that the support rod 130a is adjacent to the support rod 130b adjacent thereto. The piezoelectric plate 102 having the input terminal and the output terminal is inserted into the groove 112 formed in the vertical direction to be supported. If the support rod 130 is formed using a metal material, the support rod 130 can be used as an input terminal of the input electrode, thereby solving the difficulty of wiring, thereby achieving a reliable connection. 3 shows a method of supporting a piezoelectric transformer driven in one wavelength mode, but is also applied to a piezoelectric transformer driven in a half wavelength and 3/2 wavelength mode in the same manner. Here, the support point supported by the support rod 130 becomes a point at which a strong stress is applied to the piezoelectric plate 102. Therefore, the support rod 130 supports the piezoelectric plate 102 in a narrow range, and enables driving of the correct frequency.

In addition, the piezoelectric transformer 100 according to the present invention may be configured to support the plurality of piezoelectric plates 102a-102n between the plurality of supporting rods 130a-130b as shown in FIG. 6, as shown in FIG. 7. As described above, the upper support plate 110 may be removed.

Here, in the piezoelectric transformer 100 according to the present invention, the common terminal 104 is formed in the longitudinal direction on the outer surface of the entire portion 103 of each piezoelectric plate 102, as shown in FIG. Input terminal 105 is also formed in the longitudinal direction on the outer surface of the), the output terminal 107 may be formed on the outer surface 106 of one end.

5, a plurality of common terminals 104a-104n are arranged in the longitudinal direction on the outer surface of the entire portion 103 of each piezoelectric plate 102, and a plurality of common terminals 104a-104n are arranged on the outer surface of the rear portion 108. The input terminals 105a-105n are also arranged in the longitudinal direction, and a plurality of output terminals 107 may be arranged on the outer side surface 106 of the upper end.

In other words, in the case of piezoelectric transformers, a high voltage-ratio ratio and high-efficiency voltage-boosting action is possible, but the output power is low, and the places currently used are extremely limited. Therefore, in order to obtain a constant boost ratio as shown in FIG. 4, the piezoelectric plates 102a to 102n may be connected in parallel to form input and output terminals to have one input unit and one output unit. . In such a configuration, the same voltage and frequency are applied through each input unit to boost the voltage, and the voltage is output through the output unit. As shown in FIG. 5, in order to obtain high output power in the piezoelectric transformer, a plurality of inputs and outputs may be formed on one piezoelectric plate. Therefore, a voltage having a specific frequency is applied through the plurality of input electrodes, and a boosting action is performed to output a voltage through the output unit, thereby obtaining high output power.

In addition, the piezoelectric transformer according to the present invention has a plurality of piezoelectric plates 102a-102n formed in grooves formed by fitting a plurality of support rods 130a-130n between the upper and lower support plates 110 and 120 as shown in FIG. 8. In the state of inserting the upper support plate 110, the lower support plate 120 and the piezoelectric plate 102 to form a cover 150 of the rectangular parallelepiped for wrapping from the outside can be configured as a single element. Therefore, since it is firmly fixed by the cover 150, it is easy to handle and a large amount of power can be obtained with a single element.

Referring back to the present invention, since the support rod 130 supporting the piezoelectric plate 102 can be used as an input terminal, the vibration electrode can be simultaneously supported as an electrode, thereby simplifying the input electrode, and one piezoelectric plate. Since a large number of input / output terminals can be formed at 102, a high output power source can be obtained.

The piezoelectric transformer of the present invention, which forms a plurality of input / output units in one piezoelectric plate 102 and supports the plurality of piezoelectric plates using an insulating material or a support rod made of metal, can obtain a high output power. Therefore, although the piezoelectric transformer of the related art has the characteristics of high efficiency and high boost ratio (when stacked), the purpose of the high output power is not achieved, and the high output power can be obtained as compared with the limited application range. It can be applied to the required electronic and electrical equipment. For example, in the case of a fluorescent lamp, the power consumption is about 30-50W, which was previously driven using a winding-type transformer, but the piezoelectric transformer according to the present invention can be applied to fluorescent lamps.

As described above, the piezoelectric transformer according to the present invention achieves an effective connection between the input electrode and the input terminal, and by driving a plurality of piezoelectric plates in parallel to obtain high output power such as high voltage and high current, the application is not limited. There are effects that can be applied to a variety of electronic, electrical equipment.

Preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto and may be improved or modified by those skilled in the art within the technical scope of the present invention.

Claims (7)

The support rod 130a by vertically fitting a plurality of cylindrical support rods 130 having a cylindrical shape to the upper support plate 110 having at least one groove formed therein and the lower support plate 120 having grooves corresponding to the upper support plate 110. And a piezoelectric plate (102) having an input terminal and an output terminal in a groove (112) formed between the adjacent support rod (130b) and a longitudinal direction. 2. The piezoelectric plate (102) according to claim 1, wherein the piezoelectric plate (102) has a plurality of common terminals (104a-104n) arranged in the longitudinal direction on the outer surface of the whole (103), and a plurality of input terminals (105a-) on the outer surface of the rear portion (108). 105n) arranged in the longitudinal direction, the support device for a piezoelectric transformer, characterized in that formed on the outer surface 106 of the upper end by arranging a plurality of output terminals (107). The piezoelectric transformer supporting device according to claim 1 or 2, wherein the supporting device of the piezoelectric transformer is formed by supporting at least one piezoelectric plate (102). The support device of a piezoelectric transformer according to claim 1, wherein the support rod (130) is formed of a cylindrical metal material. The support device of a piezoelectric transformer according to claim 1, wherein the support rod (130) is formed of a cylindrical insulating material. The piezoelectric transformer supporting device according to claim 1, wherein the piezoelectric transformer is formed by removing the upper support plate (110) from the supporting device of the piezoelectric transformer. According to claim 1, wherein the piezoelectric transformer supporting device to the outside of the piezoelectric plate 102 is fitted between the upper support plate 110 and the lower support plate 120 and the upper support plate 110 and the lower support plate 120. Supporting device of the piezoelectric transformer, characterized in that the cover 150 of the rectangular parallelepiped for wrapping.