18 results about "Piezoelectric transformer" patented technology

The invention relates to a piezoelectric transformer (1) having an input region (2) and an output region (3), wherein the input region (2) is configured to convert an applied alternating voltage into a mechanical oscillation, wherein the output region (3) is configured to convert the mechanical oscillation into a voltage, and wherein the piezoelectric transformer (1) has a longest edge (13) and a shortest edge (14), wherein the longest edge (13) has a length which is at most twenty times as long as the length of the shortest edge (14).

A method of operating a piezoelectric plasma generator (14) comprising applying an input signal (S in ) to a piezoelectric transformer (1) of the piezoelectric plasma generator (14), wherein an absolute value (|A peak |) of a peak amplitude of the input signal (S in ) is periodically reduced and increased to a level less than and greater than a strike voltage (V ig ) of the plasma generator (14) such that a plasma periodically collapses.

The utility model discloses a piezoelectric transformer novel packaging body preparation device which comprises a bottom support, a vertical block of the bottom support is provided with a lower die through a cushion block, and a boss portion of the lower die is provided with a piezoelectric transformer novel packaging lower shell lower forming cavity and a piezoelectric transformer novel packaging cover lower forming cavity. A communicated lower forming medium runner is arranged between the lower forming cavity of the novel packaging lower shell of the piezoelectric transformer and the lower forming cavity of the novel packaging cover of the piezoelectric transformer; an upper die is installed on the lower die, a piezoelectric transformer novel packaging lower shell upper forming cavity and a piezoelectric transformer novel packaging cover upper forming cavity are formed in the inner concave portion of the upper die, and a piezoelectric transformer novel packaging lower shell upper forming male die is arranged in the piezoelectric transformer novel packaging lower shell upper forming cavity. A communicated upper forming medium flow channel is arranged between the piezoelectric transformer novel packaging lower shell upper forming cavity and the piezoelectric transformer novel packaging cover upper forming cavity. The equipment is simple in structure and convenient to use.

The application discloses a low-temperature plasma metal activation device, which comprises a shell, a power module, a control unit, a man-machine interaction unit, a lifting platform, an isolation cover and at least two piezoelectric transformers. The power module, the control unit, the lifting platform and the piezoelectric transformers are arranged in the shell. The isolation cover is provided with a storage groove for placing the metal to be activated. The lifting platform is connected with the piezoelectric transformer and used for controlling the up-and-down movement of the piezoelectric transformer. The man-machine interaction unit is used for controlling the operation of the low-temperature plasma metal activation device and displaying the working time and the plasma intensity of the device. The control unit controls the piezoelectric transformer to generate high voltage, the high voltage breaks through the air through the isolation cover, and low-temperature plasma is generated to activate the metal and eliminate the bacteria and oxygen atoms on the surface of the metal. The application can improve the operation convenience of the low-temperature plasma metal activation device, improve the efficiency, and reduce the volume and cost of the device.

The present invention relates to a radio frequency energy harvester module and an optimization circuit for efficient power conversion and storage. The harvester module receives an AC input voltage from a wireless power source, rectifies it into a DC voltage, and uses a piezoelectric transformer to convert this voltage into a transformed AC signal, which is subsequently rectified to generate a stable DC output. The system includes a DC to AC converter or an oscillator to generate excitation or oscillation signals, matched to the resonance frequency of the piezoelectric transformer. The invention also introduces an optimization circuit for managing power storage and delivery to external devices, ensuring adaptive and efficient energy usage. The method includes steps for converting wireless power into usable DC output using rectification, piezoelectric transformation, and feedback-based optimization.

The invention relates to the technical field of piezoelectric transformers, in particular to a radial vibration piezoelectric transformer with asymmetric protruding electrodes and a preparation method of the radial vibration piezoelectric transformer. A primary side and a secondary side of the piezoelectric transformer can be formed by alternately stacking piezoelectric ceramic materials with the same or two different dielectric constants, and no isolation piece or an isolation piece is arranged between the primary side and the secondary side; the intelligent temperature control layer is arranged on the outer layer of the transformer and comprises a thermosensitive phase change material; the self-adaptive frequency regulation circuit is connected with the input end of the transformer; and the insulation heat dissipation channel structure forms an annular insulation heat dissipation gap at the edge of the ceramic single sheet. Through reasonable matching of primary and secondary structure parameters and a load relation, the piezoelectric transformer has excellent characteristics of constant current output, constant power output, same phase or pi phase difference between input voltage and input current and the like, the efficiency of the piezoelectric transformer is improved to the greatest extent, the loss of the piezoelectric transformer is reduced, and the reliability of the piezoelectric transformer is improved.

A power converter includes a piezoelectric transformer comprising a piezoelectric material and metalized electrodes that form two or more ports, at least one of the two or more ports being an input port having an input port surface area, at least one of the at least two ports being an output port having an output port surface area, wherein, the piezoelectric transformer has a physical characteristic of a geometry term H comprised of piezoelectric transformer dimensions at least one of input port and output port measurements, including and a voltage swing across the input port, a voltage swing across the output port, a charge utilization at the input port, a charge utilization at the output port, an input voltage, an output voltage, and a transformation ratio.

To provide a drive technique of a piezoelectric transformer that has improved utility.SOLUTION: A drive device for a piezoelectric transformer includes: a piezoelectric transformer drive unit 110 for applying a drive voltage to a piezoelectric transformer PZT1 to be driven; a coupling circuit pad for taking out an output voltage from the piezoelectric transformer PZT1 through capacitive coupling; a multivibrator 130 for inputting and oscillating the taken-out output voltage feedback signal to control a frequency of the drive voltage applied to the piezoelectric transformer PZT1 by the piezoelectric transformer drive unit 110; and a λ / 2 frequency oscillation prevention unit 140 for preventing an oscillation frequency of the multivibrator 130 from deviating from a prescribed drive frequency.SELECTED DRAWING: Figure 1

The present invention relates to a radio frequency energy harvester module. The harvester module receives an AC input voltage from a wireless power source, rectifies it into a DC voltage, and uses a piezoelectric transformer to convert this voltage into a transformed AC signal, which is subsequently rectified to generate a stable DC output. The system includes an oscillator to generate excitation or oscillation signals, matched to the resonance frequency of the piezoelectric transformer. The method includes steps for converting wireless power into usable DC output using rectification, piezoelectric transformation, and feedback-based optimization.

To provide a driving technique for a piezoelectric transformer with further improved serviceability.SOLUTION: A driving device for a piezoelectric transformer comprises: a switching circuit 110 for applying a driving voltage to a to-be-driven piezoelectric transformer PZT1; a coupling circuit pad for taking out an output voltage from the piezoelectric transformer PZT1 by capacitive coupling; and a multi-vibrator 130 to which a taken-out output voltage feedback signal is input to oscillate to allow the switching circuit 110 to control a driving frequency of the driving voltage applied to the piezoelectric transformer PZT1. An oscillation circuit has a phase leading circuit 132 for varying a leading phase during the oscillation.SELECTED DRAWING: Figure 1

The invention relates to the technical field of electronic transformer driving, in particular to a piezoelectric transformer driving circuit capable of automatically tracking resonant frequency, which comprises an LC series resonant circuit, an inductor, a capacitor, an inductor, a capacitor and a capacitor, the switching device is connected to the two ends of the capacitor in the LC series resonance circuit in parallel; the input end of the analog closed-loop control circuit is connected with the two ends of a capacitor in the LC series resonance circuit, and the analog closed-loop control circuit is used for sampling resonance voltage signals; the output end of the square wave generator is connected with the control end of the switching device and is used for outputting frequency-variable driving square waves; the analog closed-loop control circuit comprises a peak detection unit. Full-automatic frequency tracking is achieved, and the problem that an original fixed parameter circuit is poor in environment adaptability is thoroughly solved. No matter how the temperature and the load change, the circuit can automatically lock the resonance point, manual intervention is not needed, and the reliability and the robustness of the product are greatly improved.

The invention relates to a device for generating a non-thermal atmospheric-pressure plasma, comprising: a first housing (11) in which a piezoelectric transformer (1) is arranged; and a second housing (15) in which a control circuit (14) is arranged, which is designed to apply an input voltage to the piezoelectric transformer (1). According to another aspect, the invention relates to an action chamber comprising the device and a sealed gas volume or an unsealed gas volume.

The invention relates to the field of piezoelectric ceramic materials, in particular to a ternary system piezoelectric ceramic material and a preparation method thereof, the chemical structural general formula of the ternary system piezoelectric ceramic material is shown as follows: alphaPb (Mg1 / 3Nb2 / 3) O3-(1-alpha) Pb (ZrxTi1-x) O3-ywt.% BiScO3-zwt.% Li2MO4: Ln, Ln is a lanthanide rare earth element, M is Mo or W, and the sum of the chemical structural general formula of the ternary system piezoelectric ceramic material and the chemical structural general formula of the ternary system piezoelectric ceramic material and the chemical structural general formula of the ternary system piezoelectric ceramic material is 100%. 0.3 < = x < = 0.6; 0 < alpha < = 0.3; x is more than or equal to 0.5 and less than or equal to 5, y is more than or equal to 0.5 and less than or equal to 5, z is more than or equal to 1 and less than or equal to 3, and tests show that the prepared piezoelectric ceramic has good piezoelectric property and a relatively high mechanical quality factor, can be used as a functional material of a high-power emission type, a high-power piezoelectric generator, a piezoelectric transformer and the like, and is widely applied to electromechanical transformation systems such as a sonar system, an ultrasonic atomization system, an ultrasonic vibration system and the like.

The utility model provides a kind of negative ion generating circuit and device based on air conditioning system, comprising: filter circuit, rectifier circuit, switching power supply and piezoelectric transformer;Filter circuit is connected with live wire, zero line respectively;Rectifier circuit is connected with live wire, zero line and switching power supply respectively;Switching power supply is connected with piezoelectric transformer, and the output end of piezoelectric transformer is connected with the external negative ion guiding device;The high voltage electric field connecting end of negative ion guiding device is connected with the output end of piezoelectric transformer, and the reference ground connecting end of negative ion guiding device is connected with the signal ground end of switching power supply, and reference ground connecting end is also connected to ground end or the power ground end of rectifier circuit by high voltage resistance.The utility model optimizes the circuit design in the scheme of installing negative ion generating device based on air conditioning system, and can reduce leakage current.

The invention relates to the technical field of electronics, in particular to a packaging structure for improving efficiency of a piezoelectric transformer and an adjusting method, the packaging structure comprises a packaging frame lower copper plate and a piezoelectric transformer main body, the top surface of the packaging frame lower copper plate is covered with a flexible thermal interface layer, and the piezoelectric transformer main body is fixedly mounted on the top surface of the flexible thermal interface layer; the packaging structure is arranged to realize the prestress adjustable design of the piezoelectric transformer, and based on the phenomenon that the working efficiency of the piezoelectric transformer is firstly increased and then decreased along with the increase of the pressure stress, the optimal downward pressure stress parallel to the polarization direction is applied to improve the working efficiency of the piezoelectric transformer; meanwhile, the copper plate is in contact with the piezoelectric transformer, temperature rise generated by the piezoelectric transformer in the working state can be effectively reduced, the purpose of maintaining the high-efficiency working state is achieved, the wire is led out through the side face electrode, the adverse effect of wiring on application of pre-tightening force is avoided, and meanwhile damage to wire connection is reduced.

This invention discloses a low-potential space electric-magnetic field energy harvesting device for GIS, comprising: a space magnetic field energy harvesting module and a space electric field energy harvesting module, which are electrically connected. The space magnetic field energy harvesting module includes a magnetoelectric conversion group for harvesting the space magnetic field energy surrounding the GIS and converting it into an induced voltage. The space electric field energy harvesting module is used to harvest the induced voltage surrounding the GIS. The space electric field energy harvesting module includes a piezoelectric transformer, which can both boost the harvested induced voltage and boost the induced voltage generated by the connected space magnetic field energy harvesting module. This invention possesses both space magnetic field and space electric field energy harvesting capabilities, enabling higher energy harvesting power. The space electric field energy harvesting module also has a boosting capability, improving the overall energy harvesting efficiency.

The present invention relates to electrical devices (1, 10, 11) comprising piezoelectric elements (1a, 1b, 10a, 11a) formed in a variety of known geometrical shapes and polling directions. The present invention is based on the inventive concept of switching place between the set of output electrodes (20a, 21a) and the set of output electrodes (20b, 21b) to enable for a significant increase in step-up conversion in comparison to the conventional electrode arrangement used in known piezoelectric transformers.

The invention relates to a transient spark discharge device (1) configured to generate an atmospheric pressure plasma filament (10) comprising the following components: - a controller circuit (2-1) connected to and configured to control - a DC-voltage-driven driver circuit (2-2) configured to generate a first signal at a first output (7), wherein the controller circuit is configured to control at least one signal property of the first signal, such as an amplitude, a frequency and / or a shape of the first signal, wherein the first output (7) is electrically connected to - a piezoelectric transformer (2-3), wherein the piezoelectric transformer is configured to generate a second signal at a second output (9), wherein the second output (9) is electrically connectable or connected to - a nozzle (3) comprising one or more electrically conductive electrodes (3-1) connectable or connected to the second output (9), wherein each electrode (3-1) comprises a conductive electrode tip (3-4), wherein each electrode comprises a hollow channel (3-2) with a first opening (3-2-1) at its electrode tip (3-4) and a second opening (3-2-2) at an opposite end of the channel (3- 2), such that a feed gas (8) may be flown from the second opening (3-2-2) to the first opening (3-2-1) for replenishing the feed gas (8) at the electrode tip (3-4), wherein the second signal is configured to cause a transient spark discharge at each electrode tip (3-4) of the one or more electrodes such as to generate a transient plasma filament (10) at each electrode tip (3-4).