CN204316373U - A kind of piezoelectric ceramic transformer - Google Patents

Abstract

The utility model discloses a kind of piezoelectric ceramic transformer, this piezoelectric ceramic transformer makes through techniques such as sintering and high voltage polarizations with ferroelectric ceramic material, utilize inverse piezoelectric effect and the direct piezoelectric effect of piezoelectric, complete the second energy conversion of electric energy-mechanic energy-electric energy, realize low-voltage input, the Novel patch device that high voltage exports.Its basic structure has various ways according to shape, electrode and polarised direction, the utility model is the piezoelectric transformer of a rectangular flap-type structure, its structure is simple, makes easily, and has higher step-up ratio, without electromagnetic interference, do not burn and the feature of not short circuit.Be applicable to the occasion such as ion generator and small high-voltage power.

Description

A kind of piezoelectric ceramic transformer

Technical field

The utility model belongs to transformer application field, particularly realizes a kind of piezoelectric ceramic transformer.

Background technology

Piezoelectric transformer is a kind of novel piezoelectric device starting in later stage the 1950's to develop, and is invented the earliest by c.A.Rosen in 1956.Along with lead zirconate titanate (PbZrTiO3) is contour and height the appearance of piezoceramic material, the development of piezoelectric transformer just achieves significant progress.Current piezoelectric transformer is in the high-tension apparatuses such as kinescope, tonotron, Xerox, electrostatic precipitation, low-power laser pipe, ion generator, high voltage polarization.

Due to piezoelectric ceramic transformer, to have size little, structure is simple, non-combustible, radiation hardness, the advantage such as highly reliable, it is the main cause that piezoelectric ceramic limit obtains extensive use, because piezoelectric ceramic transformer is a kind of novel high-pressure transformer, it has many advantages, so it makes power supply mainly for generation of adopting piezoelectric ceramic transformer stepup transformer in the device of high pressure, working stability is reliable, at present, piezoelectric ceramic transformer is just promoted the use of in the high-tension apparatus of high voltage-small current, ceramic transformer is to start to be applied to radar, laser, in the device such as electrostatic precipitation and duplicating, replace appendiron core transformer.

Summary of the invention

The utility model provides a kind of piezoelectric ceramic transformer.

The technical scheme realizing the utility model object is: piezoelectric ceramic transformer by the set of applications of the application of a piezoelectric buzzer and piezoelectrics altogether, composition piezoelectric resonator.A sinusoidal alternating voltage consistent with piezoelectric transformer resonance frequency is inputted at the drive end of buzzer, piezoelectric resonator produces vibration, conduct to the generating end of igniter, produce continuous print sine voltage, if add low frequency modulations by modulator-demodulator on high-frequency driving voltage, then Signal transmissions can be realized.The version of the utility model piezoelectric ceramic transformer as shown in Figure 1, comprises employing lead lanthanum zirconate titanate (PLZT) electrooptical ceramics material, and, the series of process such as high temperature sintering and high voltage electric field polarization shaping through high pressure is made, containing drive part and power generation part.Piezoelectric ceramic transformer adopts string configuration, and adopt all-wave mould resonance, fulcrum should be in ceramics length with point place.Drive part adopts a horizontal vertical type structure to the mapping mode of power generation part energy, adopts two-tube self-excited oscillation circuit to be drive circuit.Piezoelectric ceramic transformer, based on positive inverse piezoelectric effect, in electromechanical energy two times transfer process, is boosted by the conversion of body internal impedance.When piezoelectric transformer input (drive part) adds the alternating voltage of certain frequency, due to inverse piezoelectric effect, make piezoelectric transformer generation stretching vibration along its length, the electric energy of input is converted to mechanical energy.At power generation part, owing to there is extensional vibration, by direct piezoelectric effect, mechanical energy is converted to electric energy, makes output have high voltage to export.Because the reflected umpedance of piezoelectric ceramic transformer increases with the reduction of load impedance, this characteristic is very important when high-voltage applications.When load short circuits or electrion, the input impedance of ceramic transformer increases sharply, and ensures transformer and peripheral circuit is unlikely burns.Therefore, use piezoelectric ceramic transformer, power supply is without the need to separately establishing short-circuit protection circuit.

Compared with prior art, it is simple that the utility model provides one to have structure, makes easily, and there is higher step-up ratio, without electromagnetic interference, do not burn, not short circuit and the high feature of stability.

Accompanying drawing explanation

Fig. 1 is a kind of piezoelectric ceramic transformer structure chart of the utility model.

Fig. 2 is a kind of piezoelectric ceramic transformer equivalent circuit diagram of the utility model.

Fig. 3 is a kind of piezoelectric ceramic transformer S11 of the utility model parameter characteristic figure.

Embodiment

Below in conjunction with accompanying drawing, the utility model is described in further detail.

Composition graphs 1, the utility model is a kind of piezoelectric ceramic transformer, comprises employing lead lanthanum zirconate titanate (PLZT) electrooptical ceramics material, and, the series of process such as high temperature sintering and high voltage electric field polarization shaping through high pressure is made, containing drive part and power generation part.Piezoelectric ceramic transformer adopts string configuration, and adopt all-wave mould resonance, fulcrum should be in ceramics length with point place.Drive part adopts a horizontal vertical type structure to the mapping mode of power generation part energy, adopts two-tube self-excited oscillation circuit to be drive circuit.Piezoelectric ceramic transformer, based on positive inverse piezoelectric effect, in electromechanical energy two times transfer process, is boosted by the conversion of body internal impedance.When piezoelectric transformer input (drive part) adds the alternating voltage of certain frequency, due to inverse piezoelectric effect, make piezoelectric transformer generation stretching vibration along its length, the electric energy of input is converted to mechanical energy.At power generation part, owing to there is extensional vibration, by direct piezoelectric effect, mechanical energy is converted to electric energy, makes output have high voltage to export.Because the reflected umpedance of piezoelectric ceramic transformer increases with the reduction of load impedance, this characteristic is very important when high-voltage applications.When load short circuits or electrion, the input impedance of ceramic transformer increases sharply, and ensures transformer and peripheral circuit is unlikely burns.Therefore, use piezoelectric ceramic transformer, power supply is without the need to separately establishing short-circuit protection circuit.

Fig. 2 is the equivalent circuit diagram of the utility model piezoelectric ceramic transformer, the S parameter characteristic of Fig. 3 circuit for this reason, and as can be seen from Figure 3, the peak signal decay of this kind of transformer is less, and invention design performance is good, can meet the requirement of system.

The utility model is a kind of piezoelectric ceramic transformer, composition graphs 1, its operation principle is summarized as follows: adopt lead lanthanum zirconate titanate (PLZT) electrooptical ceramics material, and the series of process such as, high temperature sintering shaping through high pressure and high voltage electric field polarization are made, containing drive part and power generation part.Piezoelectric ceramic transformer adopts string configuration, and adopt all-wave mould resonance, fulcrum should be in ceramics length with point place.Drive part adopts a horizontal vertical type structure to the mapping mode of power generation part energy, adopts two-tube self-excited oscillation circuit to be drive circuit.Piezoelectric ceramic transformer, based on positive inverse piezoelectric effect, in electromechanical energy two times transfer process, is boosted by the conversion of body internal impedance.When piezoelectric transformer input (drive part) adds the alternating voltage of certain frequency, due to inverse piezoelectric effect, make piezoelectric transformer generation stretching vibration along its length, the electric energy of input is converted to mechanical energy.At power generation part, owing to there is extensional vibration, by direct piezoelectric effect, mechanical energy is converted to electric energy, makes output have high voltage to export.Because the reflected umpedance of piezoelectric ceramic transformer increases with the reduction of load impedance, this characteristic is very important when high-voltage applications.When load short circuits or electrion, the input impedance of ceramic transformer increases sharply, and ensures transformer and peripheral circuit is unlikely burns.Therefore, use piezoelectric ceramic transformer, power supply is without the need to separately establishing short-circuit protection circuit.

The utility model piezoelectric ceramic transformer replaces common magnetic core wire-wound transformer, because it is both without magnetic core, copper cash winding is not needed yet, not only overcome the coiling of high pressure winding and the difficulty of insulation processing of retrace transformer, and the high pressure coordination problem of retrace transformer need not be considered, ringing can not occur, substantially increase the efficiency of transformer, meanwhile, its volume is little, lightweight, can not strike sparks punctures, is not afraid of the features such as short circuit is burnt, not mouldy, high by electromagnetic interference, failure rate is low, reliability, long service life.Require that electronic devices and components are to miniaturized and integrated direction development, piezoelectric transformer also will to this future development.Sintering temperature too high is at present unfavorable for the integrated of piezoelectric transformer.Therefore, filming, multiple stratification, low-temperature growth will be development trends of piezoelectric transformer.

Claims (1)

1. a piezoelectric ceramic transformer, is characterized in that: comprise input port, output port 2, drive and generating four parts, wherein, input port 1 coupling part structure is divided into left and right two parts, and left part is drive part, and right-hand component is power generation part; Output port 2 be positioned at input port 1 connect the central authorities of plane, the lower surface of piezoelectric transformer is connected to the ground and connects; Total adopts lead lanthanum zirconate titanate (PLZT) electrooptical ceramics material, and the series of process such as, high temperature sintering shaping through high pressure and high voltage electric field polarization are made; Piezoelectric ceramic transformer adopts string configuration, adopts all-wave mould resonance, and fulcrum should be 1/4 and 3/4 place in ceramics length; Drive part adopts a horizontal vertical type structure to the mapping mode of power generation part energy, adopts two-tube self-excited oscillation circuit to be drive circuit.