CN104821224A - Inductance based on piezoceramic ceramic material and application thereof - Google Patents
Inductance based on piezoceramic ceramic material and application thereof Download PDFInfo
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- CN104821224A CN104821224A CN201510253394.6A CN201510253394A CN104821224A CN 104821224 A CN104821224 A CN 104821224A CN 201510253394 A CN201510253394 A CN 201510253394A CN 104821224 A CN104821224 A CN 104821224A
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Abstract
The invention discloses an inductance based on a piezoceramic ceramic material and an application thereof, wherein the inductance based on the piezoceramic ceramic material uses the piezoceramic ceramic material to make into rectangle, disc-shaped, ring-shaped, triangular or trapezoidal piezoelectric elements, and a pair of upper electrodes and a pair of low electrodes are respectively arranged on the two surfaces of the piezoelectric elements. Corresponding piezoceramic ceramic inductors are designed according to the demands of different frequencies aiming to the characteristics that the piezoceramic ceramic material has an inductive condition during the process from capacitance to the inductive condition then to the capacitance in a resonant condition. A vibration mode of the inductance which works in a vibration mode comprises an elongated vibration mode, a radial vibration mode, a thickness vibration mode and a radiation vibration mode and the like. The inductance based on the piezoceramic ceramic material and the application thereof can be used for capacitive compensation in driving of a piezoelectric transformer or other occasions which apply the inductance. The inductance based on the piezoceramic ceramic material and the application thereof are convenient to integrate, have the advantages that the inductance based on the piezoceramic ceramic material and the application thereof are small in volume, light in weight, simple in structure, does not use copper and iron materials, are not afraid of be affected with damp, can not burn, are not obstructed by electromagnetism and large in energy density and the like, and can meet the demands of integrated circuits for the inductance to a certain extent.
Description
Technical field
The present invention relates to a kind of inductance component, particularly relate to a kind of inductance based on piezoceramic material and application thereof.
Background technology
Inductance component is used in the circuit element realizing inductance in circuit specially, and existing inductance element is made up of conducting material wound around magnetic cores, typical in copper cash, also magnetic core can be removed or replace with ferrimagnet.The core material higher than the magnetic permeability of air can constrain in magnetic field around inductance element more closely, thus increases inductance.Inductance has a variety of, mostly makes around ferrite (ferrite) bobbin with outer enamel coil (enamel coated wire), and some protection inductance is placed in coil in ferrite completely.The core of some inductance elements can regulate, and can change inductance size thus.Small inductor can directly be etched on pcb board, by a kind of method of laying helical trajectory.Along with the development of radio communication, increasing equipment is pursued miniaturized, and low cost, low power consuming, proposes further requirement to the integrated level of circuit.And existing traditional inductance part makes manufacturing process complicated based on the know-why of coil winding, bulky, from area to cost, all seriously govern the development of integrated circuit.
Summary of the invention
The object of this invention is to provide and a kind ofly can meet integrated circuit to the inductance based on piezoceramic material of inductance demand and application thereof.
The object of the invention is to be achieved through the following technical solutions:
Inductance based on piezoceramic material of the present invention, adopts piezoceramic material to make the piezoelectric element of any one shape following:
Rectangle, disc, annular, triangle and trapezoidal, two surfaces of described piezoelectric element arrange a pair top electrode and bottom electrode respectively.
The application of the above-mentioned inductance based on piezoceramic material of the present invention, the capacitive compensation in driving for piezoelectric transformer.
As seen from the above technical solution provided by the invention, the inductance based on piezoceramic material that the embodiment of the present invention provides and application thereof, rectangle, disc, annular, triangle or trapezoidal piezoelectric element is made owing to adopting piezoceramic material, be convenient to integrated, have that volume is little, lightweight, structure is simple, without copper-steel material material, be not afraid of and make moist, can not burn, not by advantages such as electromagnetic interference, energy density are large, the demand of integrated circuit to inductance can be met to a certain extent.
Accompanying drawing explanation
Fig. 1 a, Fig. 1 b, Fig. 1 c, Fig. 1 d are respectively the structural representation of the inductance based on piezoceramic material of rectangle that the embodiment of the present invention provides, strip, disc, annular.
Fig. 2 is Rectangular piezoelectric inductor profile radiation vibration shape schematic diagram in the embodiment of the present invention.
Fig. 3 is Rectangular piezoelectric inductor 45kHz to 110kHz impedance angle finite element simulation and experimental results schematic diagram in the embodiment of the present invention.
Fig. 4 a is Rectangular piezoelectric inductor profile radiation vibration shape equivalent inductance, equivalent resistance and impedance angle schematic diagram in the embodiment of the present invention.
Fig. 4 b is the enlarged drawing of dotted portion in Fig. 4 a.
Fig. 5 a is rectangular piezoelectric ceramic inductance in the embodiment of the present invention.
Fig. 5 b be in the embodiment of the present invention piezoelectric ceramic inductance drive for piezoelectric transformer in the equivalent schematic diagram of capacitive compensation.
Fig. 6 is the impedance angle change of piezoelectric transformer before and after rectangular piezoelectric ceramic inductance compensation in the embodiment of the present invention.
Fig. 7 a is the voltage and current oscillogram of piezoelectric transformer before rectangular piezoelectric ceramic inductance compensation in the embodiment of the present invention, and voltage delay is in electric current.
Fig. 7 b is the voltage and current oscillogram of piezoelectric transformer after rectangular piezoelectric ceramic inductance compensation in the embodiment of the present invention, voltage leading current.
Embodiment
To be described in further detail the embodiment of the present invention below.
Inductance based on piezoceramic material of the present invention, its preferably embodiment be:
Piezoceramic material is adopted to make the piezoelectric element of any one shape following:
Rectangle, disc, annular, triangle or trapezoidal, two surfaces of described piezoelectric element arrange a pair top electrode and bottom electrode respectively.
Described rectangle comprises square and strip.
Should based on piezoceramic material inductance the vibration mode of mode of oscillation work comprise following any one or multiple:
Strip vibration mode, radial vibration mode, thickness vibration mode, radiation vibration mode.
The application of the above-mentioned inductance based on piezoceramic material of the present invention, its preferably embodiment be:
Capacitive compensation in driving for piezoelectric transformer, also may be used for the occasion of other any application inductance.
Inductance based on piezoceramic material of the present invention, for piezoelectric resonance condition from capacitive to perception again in capacitive process, there is the feature of perceptual state, according to the demand of different frequency, design corresponding piezoelectric ceramic inductor.
Compared with electromagnetic type inductance, piezoelectric ceramic inductance utilize piezoelectric resonance condition from capacitive to perception again in capacitive process, there is the feature of perceptual state, realize corresponding piezoelectric ceramic inductor according to the demand of different frequency.Piezoelectric ceramic inductance is convenient to integrated, has that volume is little, lightweight, structure is simple, without copper-steel material material, is not afraid of and makes moist, can not burn, not by advantages such as electromagnetic interference, energy density are large, can meet the demand of integrated circuit to inductance to a certain extent.
The operation principle of piezoelectricity inductance utilizes the piezoelectric effect of piezoelectric ceramic by the voltage of the natural frequency of applying, converts mechanical oscillation to, make piezoelectric ceramic be operated in perceptual state.Piezoelectric electro sensor roughly can be divided into Four types according to the working method of piezoelectric ceramic: strip vibration mode type, radial vibration mode type, thickness vibration mode type and radiation vibration mode type.
The present invention, by utilizing piezoelectric in the perceptual region of resonance condition, makes the inductor of characteristic frequency section, meets the demand of existing electronic circuit to coil inductance.By the vibration mode of piezoelectric, the inductor of size and dimension design characteristic frequency section, be applicable to strip vibration mode type, radial vibration mode type, thickness vibration mode type and radiation vibration mode type.Vibration mode type piezoelectric electro sense device working frequency, generally between 5kHz-100MHz, uses MEMS (Micro-Electro-Mechanical System, MEMS (micro electro mechanical system)) technique can accomplish the scope of megahertz.
Specific embodiment one:
Inductance based on piezoceramic material is mainly divided into four classes according to vibration mode:
The first kind: strip vibration mode type inductor;
Equations of The Second Kind: radial vibration mode type inductor;
3rd class: thickness vibration mode type inductor;
4th class: radiation vibration mode type inductor.
The shape of the inductance based on piezoceramic material of the present invention comprises:
Rectangular piezoelectric inductor (as Fig. 1 a), strip piezoelectric electro sensor (as Fig. 1 b), disc piezoelectric electro sensor (as Fig. 1 c), annular piezoelectric electro sensor (as Fig. 1 d) etc. are operated in the piezoelectric electro sensor of mode of oscillation.
Advantage of the present invention and good effect:
Piezoelectric ceramic inductance utilize piezoelectric resonance condition from capacitive to perception again in capacitive process, there is the feature of perceptual state, realize corresponding piezoelectric ceramic inductor according to the demand of different frequency.Piezoelectric ceramic inductance is convenient to integrated, has that volume is little, lightweight, structure is simple, without copper-steel material material, is not afraid of and makes moist, can not burn, not by advantages such as electromagnetic interference, energy density are large, can meet the demand of integrated circuit to inductance to a certain extent.
Below for Rectangular piezoelectric inductor, explain piezoelectric electro sensor method for designing in detail:
Rectangular piezoelectric inductor design:
Fig. 1 a shows Rectangular piezoelectric inductor, comprises piezoelectric element, has: two relative rectangle first type surfaces, i.e. the first and second surfaces; And connecting four side surfaces on the first and second surfaces, top electrode is arranged on the first surface of piezoelectric element; Bottom electrode is arranged on the second surface of piezoelectric element.
Fig. 2 shows the Rectangular piezoelectric inductor profile radiation vibration shape.This mode bottom offset of rectangle geometric center point minimum (being zero in theory), applies medium and is put in minimum on whole vibration shape impact herein, namely affect minimum on power transimission and power transfer efficiency by pretightning force.
Fig. 3 is Rectangular piezoelectric inductor 45kHz to 110kHz impedance angle finite element simulation and experimental results.Can the frequency of Computer Aided Design Rectangular piezoelectric inductor and inductance value by emulation.
Fig. 4 a and Fig. 4 b shows Rectangular piezoelectric inductor profile radiation vibration shape equivalent inductance, equivalent resistance and impedance angle.Near resonance point, along with the increase of frequency, impedance angle becomes perception from capacitive, and catastrophe point has appearred in 87kHz in fig .4, and impedance angle becomes+90 degree by-90 degree.Be by perceptual scope section enlarged drawing in Fig. 4 b, can find out that along with the increase inductance of frequency increases gradually, just entering induction areas, is linear increase substantially, occurs the increase that index rank is huge to the later stage close to resonance point in resonance perception region.Therefore inductance value can be adjusted according to characteristic frequency.
Specific embodiment two:
Rectangular piezoelectric inductance is used for the capacitive compensation in piezoelectric transformer driving:
Fig. 5 a shows a slice rectangular piezoelectric ceramic inductance.Fig. 5 b shows the equivalent schematic diagram of this piezoelectric ceramic inductance for the capacitive compensation in piezoelectric transformer driving.Piezoelectric transformer is in capacitive at the operating frequencies, and capacitive load is disadvantageous relative to front-end driven circuit.Drive circuit is most effective under purely resistive load, and under capacitive load, can increase switching damage, affects the drive efficiency of circuit.Existing solution is between drive circuit and piezoelectric transformer, add a capacitive compensation inductance.And traditional coil inductance complex manufacturing technology, the volume of whole circuit can be increased simultaneously, lose piezoelectric transformer advantage inherently.Therefore, adopt piezoelectric ceramic inductance to replace traditional coil inductance here, the capacitive in piezoelectric transformer work is compensated.According to practical application, piezoelectric ceramic inductor size is here 30 × 20 × 0.4mm
3, the operating frequency of piezoelectric transformer is 92.18kHz.Under this frequency, the equivalent inductance of piezoelectric ceramic is 264.6 μ H.
Fig. 6 shows the impedance angle change of piezoelectric transformer before and after rectangular piezoelectric ceramic inductance compensation.Before compensation, along with the increase of driving power, the capacitive of piezoelectric transformer is increase tendency, is unfavorable for that the efficiency of drive circuit improves.After rectangular piezoelectric ceramic inductance compensation, overall phase angle becomes perception from capacitive, and along with the increase of driving power, compensation effect is more stable, describes the reliability of piezoelectric ceramic inductance.
Fig. 7 shows the voltage and current oscillogram of piezoelectric transformer before and after rectangular piezoelectric ceramic inductance compensation.In Fig. 7 a, voltage delay, in electric current, illustrates that before compensating, piezoelectric transformer is capacitive.In Fig. 7 b, voltage leading current, illustrates that after compensating, piezoelectric transformer, in perception, demonstrates the validity and reliability of rectangular piezoelectric ceramic as inductance.
The above; be only the present invention's preferably embodiment, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claims.
Claims (4)
1. based on an inductance for piezoceramic material, it is characterized in that, adopt piezoceramic material to make the piezoelectric element of any one shape following:
Rectangle, disc, annular, triangle or trapezoidal, two surfaces of described piezoelectric element arrange a pair top electrode and bottom electrode respectively.
2. the inductance based on piezoceramic material according to claim 1, is characterized in that, described rectangle comprises square and strip.
3. the inductance based on piezoceramic material according to claim 2, is characterized in that, should based on piezoceramic material inductance the vibration mode of mode of oscillation work comprise following any one or multiple:
Strip vibration mode, radial vibration mode, thickness vibration mode, radiation vibration mode.
4. an application for the inductance based on piezoceramic material described in claim 1,2 or 3, is characterized in that, the capacitive compensation in driving for piezoelectric transformer.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107239596A (en) * | 2017-04-27 | 2017-10-10 | 株洲中车时代电气股份有限公司 | A kind of rail traffic vehicles transformer limit element artificial module construction method |
| CN112366271A (en) * | 2020-11-02 | 2021-02-12 | 安徽大学 | Integrated piezoelectric transformer capable of realizing capacitive impedance self-compensation |
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| CN112366271A (en) * | 2020-11-02 | 2021-02-12 | 安徽大学 | Integrated piezoelectric transformer capable of realizing capacitive impedance self-compensation |
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