Devices of piezoelectric effect use in transportation vehicles

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering and energy converters operating basing on the use of piezoelectric ceramic materials and can be used in any field of engineering as an electric power source. Device comprises a rotor having mechanical connection with the hub of a vehicle, spring-loaded rollers able to insignificantly move along a load acting on piezoelectric elements. Rollers interact with groups of piezoelectric elements arranged in holes made in an isolated stator. Number of rollers is equal to the number of groups of the piezoelectric elements. Piezoelectric elements in the groups are isolated from each other and are placed with their planes perpendicular to the acting load and are electrically interconnected in parallel. Mechanical connection of the roller with the piezoelectric elements is implemented by non-conductive pressing elements with recesses, while the rollers have mating circular ledges. Pressing elements are interconnected by flexible links with recesses aligned with the rollers recesses. Number of piezoelectric elements in a group is selected depending on required output voltage of the group. To create the required DC voltage, for example, for charging the vehicle accumulator battery, a high-frequency voltage converter is used containing an input capacitor, on plates of which high voltage is supplied, and located between the plates a flat output inductance, from which low voltage is removed.

EFFECT: technical result is improvement of efficiency.

3 cl, 4 dwg

 



 

Same patents:

FIELD: electricity.

SUBSTANCE: system of electric energy generation comprises a base, piezoelectric converters, installed on the base, and facilities of mechanical loading of piezoelectric converters. Piezoelectric converters are installed on elements of underwater vessel design not rigidly connected to its body, and have the working position, in which it is possible to interact with the body of the underwater vessel so that pressure of outboard water is transferred to the piezoelectric converters via the body of the underwater vessel with variation of depth of its submersion.

EFFECT: higher efficiency of energy generation and expanded area of application of piezoelectric converters.

10 cl, 4 dwg

FIELD: electricity.

SUBSTANCE: in the proposed piezoelectric generator deformation of piezoelectric elements occurs as a result of Casimir effect during modulation of distance between metal plates fixed on the rotor and piezoelements of the stator. The generator is an open system, in which it is possible to extract useful energy. Generator design differs by simplicity and may be arranged on the basis of standard commercial parts and components.

EFFECT: provision of continuous generation of energy.

5 dwg

FIELD: electricity.

SUBSTANCE: method for power generation uses a membrane operated due to pressure waves and rarefaction of air which occur during motion of transport vehicles. Oscillations of the membrane actuate an electric power generator that generates impulse alternating current. At the generator output alternating current is converted into direct current by means of a rectifier and then it is supplied to an accumulator (energy storage). Further the converter converts direct current into alternating one. In order to boost up voltage up to the required level a transformer is used; from its secondary winding voltage is supplied to respective loads.

EFFECT: improving reliability and increasing efficiency of conversion of air motion energy that occurs during motion of transport vehicles.

1 dwg

FIELD: electricity.

SUBSTANCE: invention relates to devices generating electric energy. The device for generation of electric energy comprises a solid body and two covers at the ends, which are deformed under action of hydrostatic pressure. Inside the body there are piezoelectric sensors installed tightly, onto piezoelectric material of which a force is transferred from hydrostatic pressure via covers. Under action of this force piezoelectric material of sensors is deformed, and electric voltage is generated. Some sensors inside the body are connected to each other in series, to increase voltage, creating blocks, and blocks themselves, for increasing of electric current are connected to each other in parallel into a system (8), the output voltage of which (U1) is also an output voltage of the device. This voltage is sent to terminals (7) through a switch (6).

EFFECT: invention makes it possible to create an electrical energy generator with control of value of produced electric voltage without additional devices.

2 dwg

FIELD: electricity.

SUBSTANCE: piezoelectric generator comprises a dielectric substrate, nanosized pillars from a piezoelectric semiconductor, perpendicular to a substrate, and nanosized current collector wire electrodes laid between rows of vertical nanosized pillars and contacting with them in zones of their bases. Nanosized pillars are rigidly mounted into a dielectric substrate, and nanosized current collector wire electrodes are laid on a substrate at both sides of the pillars, besides, between each two electrodes laid between neighbouring rows of pillars there is a gap, and electrodes themselves are enclosed into a layer of an elastoplastic insulator, height of which corresponds to the diameter of electrodes. The piezoelectric generator includes permanent nanosized magnetic elements rigidly connected to tops of nanosized pillars or populated into tops of nanosized pillars or submerged into drop-shaped nanosized elements, or into each permanent nanosized magnetic element.

EFFECT: expansion of piezoelectric generator functional capabilities.

1 dwg

FIELD: electrical engineering.

SUBSTANCE: element pole metal surface tapping off potential from piezoelectric element, opposite the ball (roll) rolling surface is cut into sectors perpendicular to rolling direction. Independent potential tap-off is performed from each said sector generated in transfer and removal of ball (roll) pressure from element section above sector. Proposed method is based on using periodic system of loading and unloading sections of piezoelectric element section above sectors that tap off variable static potential from regular harmonics element to be directed in conductor as AC current. Potential is tapped off identical-phase sectors arranged next but one into two common buses of opposite phase and directed into conversion device made up of dual step-down transformer with earthed primary. Variable static potential is supplied to second end. Variable eclectic current is induced in secondary with frequency corresponding to that of variable static potential.

EFFECT: generation of variable electric current.

2 cl, 5 dwg

FIELD: electricity.

SUBSTANCE: base of a device for collection and accumulation of a low-frequency magnetic field energy and mechanical oscillations is a layer structure, which is made of attached magnetostriction and piezoelectric layers. This structure is equipped with a thin-film rectifier, which consists of a rectifying diode and a capacitor. The diode is made of p-n-p semiconductor layers. A capacitor made of two metal and one dielectric layer, which are arranged directly on a structure in a single process cycle together with a substrate.

EFFECT: invention makes it possible to increase efficiency of energy collection due to transformation of oscillations energy with a value of resonant frequency in the infrasound area and to produce constant voltage at the outlet without use of additional rectification modules.

2 dwg

FIELD: electricity.

SUBSTANCE: generation method of electric pulse in inductance load of explosive piezogenerator involves impact loading with diverging wedge-shaped blast wave of piezoelectric converter in which conversion of energy of blast wave to electric energy is performed. Impact loading is formed at detonation of explosive agent. Piezoconverter is made at least of one piezoplate with electrodes on opposite edges. Shock-wave front is perpendicular to electrodes of piezoplate. Then, piezoconverter is loaded with opposite converging wedge-shaped blast wave with time difference Δt between the beginnings of the first and additional loadings of piezoelectric converter, which is chosen from the following condition: Δt=y0/2D, where y0 - length of piezoplate; D - detonation speed of explosive agent.

EFFECT: possibility of generation of electric pulse with maximum current amplitude at maintaining the value of allowable voltage on inductance load of generator and reducing the volume of piezoconverter.

4 dwg

FIELD: oil and gas production.

SUBSTANCE: magnetic clutch converts mechanical power into electrical. The device converting mechanical power into electrical one corresponds to a piezo-electric package with units of mechanical deformation on both sides of the package. The units of mechanical deformation are made as carriers mounted on a shaft; the carriers have axles and deforming rollers on them. The piezo-electric package is made as bimorph piezo-electric rings installed inside a protective case on a bushing. The magnetic clutch can be either an end-type, or cylinder-type. It consists of a driven and driving half-couplings and of a pressure-tight partition between them. The partition contains parts out of magnet-transparent material. Also, the driven half-coupling is connected to a rotor, while the driving half-coupling is connected to the shaft. A cavity of the driving half-coupling is filled with lubricating liquid, while cavities of the driven half-coupling and the device for converting mechanical power to electric power are united. They are pressure tight and are filled with lubricating liquid.

EFFECT: increased reliability and capacity of generator of power supply for downhole equipment at reduced diametre dimensions and weight of electric generator.

10 cl, 4 dwg

FIELD: engines and pumps.

SUBSTANCE: proposed method converts kinetic energy of ICE exhaust gases into electric power. In compliance with this method, kinetic energy of ICE exhaust gas pulsations is converted into electric pulses. Conversion is performed by piezoelectric converters that feature various frequency of natural oscillations owing to different weights of moving parts which allow continuous operation of at least one piezoelectric converter in resonance mode. Electric pulses are transformed into constant stabilised voltage. Electric generator generates electric power that is arranged in ICE exhaust pipes and incorporates piezoelectric converters and pulse-to-voltage converters. Outputs of piezoelectric converters are connected with appropriate inputs of electric pulse conversion unit inputs. Output of the latter unit is connected to the car electric system.

EFFECT: reliable automotive electric generator, fuel savings, improved ecology.

2 cl, 1 dwg

FIELD: electric generators; fluid medium (water, air) mechanical energy conversion to electricity.

SUBSTANCE: proposed piezoelectric generator has base, case accommodating piezoids, and device for loading these piezoids. Case is made in the form of neutral-buoyancy high-drag body of revolution and is coupled with base. Frequency of natural longitudinal vibrations of body equals that of swirl detachment from body at maximal possible Strouhal number.

EFFECT: enhanced operating effectiveness.

1 cl, 1 dwg

FIELD: electric generators; mechanical-to-electrical energy conversion.

SUBSTANCE: proposed piezoelectric generator has first bimorph piezoceramic ring with electrodes on main surfaces, as well as rollers and second bimorph piezoceramic ring with electrodes on main pins which is installed inside first bimorph piezoceramic ring coaxially with the latter. Rollers are disposed between these rings. Ring ends carry separators provided with slits accommodating springs. Rollers are held tight against one of rings or against both rings by means of these springs through rods disposed on roller pins. Internal or external ring is free to rotate. Rollers are made of piezoelectric material and have electrodes. One roller electrode is disposed on side surface, and conducting rod disposed on axis of roller revolution functions as second electrode. Electrodes may be mounted on side surface of roller along and perpendicular to axis of revolution and interconnected through switching circuit, or else they may be installed on roller ends perpendicular to its axis of revolution.

EFFECT: enhanced specific power.

5 cl, 1 dwg

FIELD: engineering of high power pulse equipment, possible implementation as executive mechanism in single time effect systems.

SUBSTANCE: explosive piezo-generator has flat-wave air blast generator and piezo-electric transformer. Piezo-transformer is made in form of additional set of rectangular piezo-plates with maximal value of remainder polarization. Piezo-plates are mounted adjacently to each other by edges with electrodes, parallel to direction of movement of air blast, and are connected electrically in parallel. Polarity of connection of at least one piezo-plate is opposite to polarity of connection of other piezo-plates, one-pole electrodes of which are connected to each other.

EFFECT: stabilized voltage at output clamps of explosive piezo-generator with RLC-load, decreased dimensional and mass characteristics of the same.

1 cl, 2 dwg

FIELD: high-voltage pulse engineering; pulse power supply to various electrophysical installations.

SUBSTANCE: proposed generator has a number of stages connected into Marx circuit arrangement. Each stage has one or more capacitors and discharge gap. At least one capacitor of each stage is made in the form of polarized ferroelectric working medium incorporating device for producing mechanical load therein, primarily in the form of explosive material charge. Generator is designed for off-line operation independently of external power supplies.

EFFECT: reduced warm-up period (about a few seconds) required to make generator ready for pulse generation.

4 cl, 1 dwg

FIELD: high power impulse engineering, explosive piezo-generators, may be used as executive mechanism in one-time action systems.

SUBSTANCE: piezo-generator contains initiation device, blast wave generator in form of monolithic body with a charge in form of a layer of explosives and piezo-electric transformer made at least of one piezo-plate with electrodes on two opposite surfaces. The layer of explosive substance is positioned in parallel to electrodes of piezo-plate, and initiation device is mounted relatively to the layer of explosive substance with its possible initiation in given points.

EFFECT: simplified construction.

3 dwg

FIELD: electricity.

SUBSTANCE: piezoelectric generator is meant for emergency power supply for low-power devices - mobile telephones and electronic locks. The generator has an actuating arm, which can act on a piezoelectric element through an actuating device, made in form of a vibromechanism meant for converting movement of the actuating arm into pulsed effect on the piezoelectric element. The actuating arm can be linked to the vibromechanism through a damper spring or mechanical spring mechanism, and the vibromechanism can be self-exciting.

EFFECT: simplicity and reliability of the design; high output of electrical energy for single mechanical action on the actuating arm.

2 dwg

FIELD: engines and pumps.

SUBSTANCE: proposed method converts kinetic energy of ICE exhaust gases into electric power. In compliance with this method, kinetic energy of ICE exhaust gas pulsations is converted into electric pulses. Conversion is performed by piezoelectric converters that feature various frequency of natural oscillations owing to different weights of moving parts which allow continuous operation of at least one piezoelectric converter in resonance mode. Electric pulses are transformed into constant stabilised voltage. Electric generator generates electric power that is arranged in ICE exhaust pipes and incorporates piezoelectric converters and pulse-to-voltage converters. Outputs of piezoelectric converters are connected with appropriate inputs of electric pulse conversion unit inputs. Output of the latter unit is connected to the car electric system.

EFFECT: reliable automotive electric generator, fuel savings, improved ecology.

2 cl, 1 dwg

FIELD: oil and gas production.

SUBSTANCE: magnetic clutch converts mechanical power into electrical. The device converting mechanical power into electrical one corresponds to a piezo-electric package with units of mechanical deformation on both sides of the package. The units of mechanical deformation are made as carriers mounted on a shaft; the carriers have axles and deforming rollers on them. The piezo-electric package is made as bimorph piezo-electric rings installed inside a protective case on a bushing. The magnetic clutch can be either an end-type, or cylinder-type. It consists of a driven and driving half-couplings and of a pressure-tight partition between them. The partition contains parts out of magnet-transparent material. Also, the driven half-coupling is connected to a rotor, while the driving half-coupling is connected to the shaft. A cavity of the driving half-coupling is filled with lubricating liquid, while cavities of the driven half-coupling and the device for converting mechanical power to electric power are united. They are pressure tight and are filled with lubricating liquid.

EFFECT: increased reliability and capacity of generator of power supply for downhole equipment at reduced diametre dimensions and weight of electric generator.

10 cl, 4 dwg

FIELD: electricity.

SUBSTANCE: generation method of electric pulse in inductance load of explosive piezogenerator involves impact loading with diverging wedge-shaped blast wave of piezoelectric converter in which conversion of energy of blast wave to electric energy is performed. Impact loading is formed at detonation of explosive agent. Piezoconverter is made at least of one piezoplate with electrodes on opposite edges. Shock-wave front is perpendicular to electrodes of piezoplate. Then, piezoconverter is loaded with opposite converging wedge-shaped blast wave with time difference Δt between the beginnings of the first and additional loadings of piezoelectric converter, which is chosen from the following condition: Δt=y0/2D, where y0 - length of piezoplate; D - detonation speed of explosive agent.

EFFECT: possibility of generation of electric pulse with maximum current amplitude at maintaining the value of allowable voltage on inductance load of generator and reducing the volume of piezoconverter.

4 dwg

FIELD: electricity.

SUBSTANCE: base of a device for collection and accumulation of a low-frequency magnetic field energy and mechanical oscillations is a layer structure, which is made of attached magnetostriction and piezoelectric layers. This structure is equipped with a thin-film rectifier, which consists of a rectifying diode and a capacitor. The diode is made of p-n-p semiconductor layers. A capacitor made of two metal and one dielectric layer, which are arranged directly on a structure in a single process cycle together with a substrate.

EFFECT: invention makes it possible to increase efficiency of energy collection due to transformation of oscillations energy with a value of resonant frequency in the infrasound area and to produce constant voltage at the outlet without use of additional rectification modules.

2 dwg

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