487results about How to "Improve energy transfer efficiency" patented technology

A transcutaneous energy transfer system, transcutaneous charging system, external power source, external charger and methods of transcutaneous energy transfer and charging for an implantable medical device and an external power source/charger. The implantable medical device has a secondary coil adapted to be inductively energized by an external primary coil at a carrier frequency. The external power source/charger has a primary coil and circuitry capable of inductively energizing the secondary coil by driving the primary coil at a carrier frequency adjusted to the resonant frequency to match a resonant frequency of the tuned inductive charging circuit, to minimize the impedance of the tuned inductive charging circuit or to increase the efficiency of energy transfer.

A piezoelectric vibration energy harvesting device which is made up of a first mass, a second, a first spring coupled to the first mass, and a second spring coupled to the second mass. A piezoelectric element is bonded between the first mass and the second spring, so that a stress applied to the second spring is applied to the piezoelectric element

A device for thinning lung secretions comprises a housing, a reed disposed in the housing, and an acoustical resistance. The reed produces a low-frequency audio shockwave in a range of about 12 Hz to about 30 Hz when vibrated. The acoustical resistance couples a patient lung cavity to the audio shockwave, thereby vibrating the patient's lung cavity to thin lung secretions.

The invention discloses a wireless electric energy transmission system based on double-layer two-way spiral coils in the technical field of wireless electric energy transmission. The problem that in the close range energy transmission process of the wireless electric energy transmission system, the transmission efficiency of the system is low due to the influence of frequency splitting is mainly solved. Based on a magnetic coupling resonance wireless electric energy transmission system of the Massachusetts Institute of Technology, the double-layer two-way wound transmitting coils are designed, namely an inner layer coil with the same number and pitch of turns is wound in the opposite direction in the inner space of an original single-layer one-way wound transmitting coil, because the winding direction of the inner layer coil is opposite to that of the original coil, so that the intensity of the coupling coefficient is reduced, the influence on the transmission efficiency of the system of the frequency splitting in the close range energy transmission process is reduced, the wireless electric energy transmission system can break away from a frequency splitting area within a shorter distance to achieve the critical coupling state, and the energy transmission efficiency of the wireless electric energy transmission system working in the close range frequency splitting area is improved.

There is provided a plasma reactor with an internal transformer. The plasma reactor comprises: a plasma chamber with a gas inlet and a gas outlet, for providing a plasma discharging space; one or more core cylinder jackets for providing a core storage space in the plasma discharging space and forming a plasma centralized channel and a plasma decentralized channel by including one or more through-apertures; and one or more transformers each including a magnetic core with primary winding surrounding the through-aperture and installed in the core storage space, wherein the plasma discharging space comprises one or more first spatial regions to form the plasma centralized channel and one or more second spatial regions to form the plasma decentralized channel. In the plasma reactor, since the transformer is installed in the plasma chamber, energy is transferred with almost no loss from the transformer to the plasma discharging space and therefore the energy transfer efficiency is very high. Then, since most of gases flow through the first spatial region and the through-aperture inside the plasma chamber, most of active gases are generated in the plasma centralized channel. Consequently, the plasma reactor is very suitable for generating large amount of active gases. Further, even though the plasma chamber is composed of a conductive material, since no special insulating region needs to be formed, it is very easy to constitute the plasma chamber. Further, since the plasma chamber itself is sufficiently capable of forming an outer case, the plasma reactor is very simply manufactured.

An apparatus for transferring electromagnetic energy includes a coil arrangement operable to transmit magnetic flux to a receiver or to receive magnetic flux from a transmitter, wherein the coil arrangement includes a main coil and at least one auxiliary coil electrically combined with the main coil such that the combination of the main coil and the at least one auxiliary coil is arranged to alter an electromagnetic coupling between the coil arrangement and the transmitter or the receiver to increase an operation alignment range between the coil arrangement and the transmitter or the receiver.

A propeller with direction-changeable rotating shaft for 6-freedom underwater robot is composed of supporting frame and 3 motors including one propulsion motor, which are connected to said supporting frame via relative connection unit. Installing said propeller to the head and tail of a robot respectively can realize 6 freedoms.

A wireless IC tag includes a wireless IC chip and two coil-shaped antennas. One end of each of the coil-shaped antennas is electrically connected to the wireless IC chip, and the other ends of the coil-shaped antennas are electrically connected to each other. The winding axes of the coil-shaped antennas are arranged at different positions, and the coil-shaped antennas have the same winding direction. A reader-writer includes an antenna connected to an information processing circuit. The antenna is electromagnetically coupled to the coil-shaped antennas for communication.

An external power system, system and method for transcutaneous energy transfer to an implantable medical device having componentry for providing a therapeutic output and a secondary coil operatively coupled to the componentry. The implantable medical device is adapted to implanted at a location in a patient. An external power source has a primary coil contained in a housing. The external power source is capable of providing energy to the implantable medical device when the primary coil of the external power source is placed in proximity of the secondary coil of the implantable medical device. A holder is adapted to be externally positioned with respect to the patient at a spot in proximity of the location of the implantable medical device and secured at the spot. The holder is attachable to the housing after the holder is secured to the patient.

The invention belongs to the technical field of battery application, and in particular to a series battery active equalization circuit based on a symmetrical multi-winding transformer structure and a control method applied to the same. The circuit comprises two groups of battery units which are arranged serially and a multi-winding transformer T which is arranged corresponding to each battery unit, wherein the battery unit comprises a battery B, a filter, a high-frequency switch M, a current-limit resistor R, a magnetic-reset and soft-switch resonance circuit and a driving circuit G which drives the high-frequency switch M to turn on/off; and the circuit is low in cost, simple in structure and control and quite high in energy transfer efficiency. Moreover, a path of duty ratio signal Vg which has two loading states also can be loaded on the driving circuit G to control the equalization circuit; if the value of the duty ratio signal Vg is increased, an equalization current is increased, and if the value of the duty ratio signal Vg is reduced, the equalization current is reduced, so that the equalization circuit current is controlled reliably, and the working efficiency is high.

A piezoelectric vibration energy harvesting device which is made up of a base, a proof mass, and a cymbal stack disposed between the base and the proof mass. The cymbal stack has a piezoelectric element disposed between the base and the proof mass, a first cymbal-shaped cap disposed between the proof mass and the piezoelectric crystal, and a second cymbal-shaped cap disposed between the piezoelectric crystal and the base.

In one embodiment the present invention includes an RFID gaming token with a ferrite core. When the RFID gaming tokens are stacked, the ferrite cores steer the flux field from the excitation antenna through the center of the annular antennas in each token. The resulting flux field increases the efficiency of the energy transfer from the excitation antenna to the passive tags. This increased efficiency also improves the data transfer to and from the passive tags. This increased efficiency allows for reading RFID gaming tokens at a higher stack height (or at a better error rate for a given stack height) as compared to existing air core gaming tokens.

The invention relates to a magnetic levitation rotor wing system and a helicopter with the same and the field of aviation, in particular to the technical field of rotor wings. The magnetic levitation rotor wing system comprises a rotor wing ring (2) and a rail ring (1), wherein the rotor wing ring (2) is connected with a rotor wing propeller point, and the rail ring (1) provides magnetic suspension force for the rotor wing ring (2). Magnetic suspension force provided by the rail ring (1) includes a driving device capable of driving blades to rotate and a suspension device capable of enabling the propeller point to suspend. A first deflection driving mechanism is arranged on the root portions of the blades of the rotor wing so that first deflection angles of the root portions of the blades can be provided, and a second deflection driving mechanism is arranged on the rotor wing ring (2) so that second deflection angles of the points of the blades can be provided. According to the magnetic levitation rotor wing system and the helicopter with the same, only an outside rail ring is needed to drive the rotor wing ring, and the blades are connected by a central connecting component; and the requirement of independent variable pitch of the rotor wing is guaranteed, partial load of the blades is counteracted with one another through the central connecting component, integrality of the rotor wing ring is increased, and working reliability of improved.

An organometallic iridium complex has high emission efficiency and a long lifetime. The iridium complex includes the structure represented by Formula (G1). In the formula, Ar represents a substituted or unsubstituted arylene group having 6 to 13 carbon atoms. R¹ to R⁶ independently represent any one of hydrogen and a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, and one of R² and R⁶ represents the alkyl group. X represents a carbon atom or a nitrogen atom, and when X represents a carbon atom, hydrogen or an alkyl group having 1 to 6 carbon atoms is bonded to the carbon atom. A dihedral angle between a ring bonded to R¹ and a phenyl group bonded to R² to R⁶ is 30° or more and 90° or less. An interior angle of the pyridine/pyrimidine ring facing R¹ is within a range of 118° to 122°.

The invention discloses a cable tunnel inspection robot equipped with wireless charging equipment and a charging method for the robot. The wireless charging equipment comprises a transmitting unit, a receiving unit and a ZigBee communication module, wherein the receiving unit is mounted on the cable tunnel inspection robot; the transmitting coils in the transmitting unit are four equal-size circular coils which are arranged on the same plane and are connected in series mutually; a square is formed by the centers of the circular coils in a surrounding manner, and the circular coils are partially overlapped mutually; a charging battery in the receiving unit is used for supplying electric energy for the cable tunnel inspection robot; and a first controller in the transmitting unit and a second controller in the receiving unit are in wireless connection through the ZigBee communication module. According to the charging method disclosed by the invention, an RFID electronic tag is adopted to realize accurate positioning of the cable tunnel inspection robot, so that quick wireless charging of a dual-cable-rope guiding rail type cable tunnel inspection robot is realized.

The invention provides nano particles compounded of up-conversion nano particles and gold nanorods and a preparation method and application of the nano particles, and belongs to the field of nano biomedicine. The method comprises the following steps: reacting up-conversion nuclear shell nano particles with a photosensitizer; and then, coupling with SiO2-coated gold nanorods to obtain the nano particles compounded of up-conversion nano particles and gold nanorods. The shell thickness of the SiO2-coated gold nanorods is 30-60nm. By means of the surface covalency or photosensitizer absorption of the up-conversion nano particles, the energy transfer efficiency is improved, so that the singlet oxygen yield is improved and the effect of photodynamics therapy is improved. Meanwhile, the acting distance betweeb the gold nanorods and the up-conversion nano particles is regulated to avoid the up-conversion fluorescence quenching phenomenon. According to the invention, upconversion and photodynamics therapy of the photosensitizer are combined with the photo-thermal effect of the SiO2-coated gold nanorods for preparing a synergic treatment nano platform. The purpose of two treatment ways are realized by one excitation light source is reached.