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3217 results about "Electromagnetic induction" patented technology

Electromagnetic or magnetic induction is the production of an electromotive force (i.e., voltage) across an electrical conductor in a changing magnetic field. Michael Faraday is generally credited with the discovery of induction in 1831, and James Clerk Maxwell mathematically described it as Faraday's law of induction. Lenz's law describes the direction of the induced field. Faraday's law was later generalized to become the Maxwell–Faraday equation, one of the four Maxwell equations in his theory of electromagnetism.

Noncontact Electric Power Transmission System

Disclosed is a noncontact electric power transmission system having a power transmitter circuit section 10 and a power receiver circuit section 30 which are adapted to be coupled to transmit electric power from a transmitter coil Lp provided in the power transmitter circuit section 10 to a receiver coil Ls provided in the power receiver circuit section 30, in a noncontact manner by means of electromagnetic induction. The noncontact electric power transmission system comprises: a separately-excited or self-excited switching circuit 2 provided in the power transmitter circuit section 10; a control IC 3 operable to drive the switching circuit 2; an LC series resonant circuit including a capacitor Cp connected in series to the transmitter coil Lp or an LC parallel resonant circuit including a capacitor Cp connected in parallel to the transmitter coil Lp; and an LC parallel resonant circuit including a capacitor Cs connected in parallel to the receiver coil Ls, wherein an oscillating frequency (Fosc) of the control IC 3, a resonant frequency (Fpr) of the LC series resonant circuit or the LC parallel resonant circuit in the power transmitter circuit section 10, and a resonant frequency (Fsr) of the LC parallel resonant circuit in the power receiver circuit section 30, have the following relationship: Fpr<Fosc<Fsr.
Owner:MURATA MFG CO LTD

Digitizer function-equipped liquid crystal display device information processing electronic device, and game device

Provided is a digitizer function-equipped liquid crystal display device capable of preventing the wire shadows of a loop antenna from being projected on a liquid crystal panel and capable of being applied to a large size liquid crystal panel. It is also possible to provide an information processing electronic device and a game device provided with the digitizer function-equipped liquid crystal display device. Here, the digitizer function-equipped liquid crystal display device includes: a liquid crystal panel 1; a light diffusion member 2 which is disposed between the liquid crystal panel 1 and a backlight 5 irradiating the liquid crystal panel 1 with light; an electromagnetic induction type loop antenna which is disposed at a portion apart from the light diffusion member 2 in the direction toward the backlight 5 by a predetermined spacing so as to detect a position on the plane of the liquid crystal panel 1 in one coordinate axis direction and another coordinate axis direction that intersects the one coordinate axis direction; and a spacing retaining means for retaining the spacing between the light diffusion member 2 and loop antenna at a predetermined spacing value. As the spacing retaining means, a first light transmitting member 3 formed of a plate material having a light transmitting property is used.
Owner:SEGA CORP

Electromagnetic induction heating type electric hair drier

The invention discloses an electromagnetic induction heating electric hair dryer, pertaining to an airflow generation and heating device. The electrical-heating hair dryer in the prior art has problems and defects in the aspects of application environment, energy saving, safety, noise, comfort, etc. A heater of the hair dryer of the invention comprises an electromagnetic induction eddy-flow heating component served as a heat generation component, electromagnetic coils winding outside the heat generation component and an electronic control circuit that is electrically connected with the electromagnetic coils and positioned outside an airflow channel. As the electric hair dryer adopts the electromagnetic induction to heat air, compared with the hair dryer with electrical heating in the prior art, the heating efficiency of the hair dryer of the invention is greatly improved and the heated air can smoothly flow in the airflow channel, thus the power consumption and operating noise of the hair dryer are remarkably reduced; the flowing speed of the airflow and the temperature distribution at the outlet section of the electric hair dryer are more even and the hair dryer is safer and more comfortable and can save more electricity when in use.
Owner:上海超人电气有限公司

Enhanced performance and security RFID device

The present invention is directed to a selectively accessible enhanced radio-frequency identification (RFID) device, that is enhanced performance and security by selectively responsive to predetermined electromagnetic interrogation thereof, that comprises an enhanced component for enabling a user to adjust readable distances and selectively enable or disable interrogatory access to the enhanced RFID device, to protect from unauthorized interrogation thereof. The inventive enhanced RFID device comprises an antenna, a microchip and at least one enhanced component. The enhanced component may use “Electromagnetic Induction” to the antenna to increase performance and “Electromagnetic Shield”, to cover the antenna. In one embodiment thereof, the enhanced RFID device may be advantageously utilizing retention component to keep closed it in an Always-OFF mode, such that the enhanced RFID device is only accessible to electromagnetic interrogation thereof, when the enhanced RFID device is open to an Always-ON mode. Therefore, the enhanced RFID device of the present invention provides an inventively user controllable, two functions in one of enhanced component, for enhanced performance and greater level of data security advantageously balanced with convenience—it is freely accessible prior to acquisition thereof by a user, and is thereafter easily made secure by the user, who is provided with the capability of readily and selectively enabling access to the data stored therein.
Owner:CHOI YU YUNG

Electromagnetic heating type suction device used for heating non-combustible cigarette

The invention discloses an electromagnetic heating type suction device used for heating a non-combustible cigarette. The electromagnetic heating type suction device used for heating the non-combustible cigarette comprises an end cover, a heater and an electromagnetic induction system, wherein a heating cavity for holding the heated non-combustible cigarette is reserved in the heater, the end cover is detachably and combinably connected to the suction end portion of the heater, a filter tip is arranged on the end cover and is communicated with an inner cavity of the heating cavity, a round cover is arranged on the end cover, a plurality of air inlets are formed in the round cover and are communicated with the inner cavity of the heating cavity, the electromagnetic induction system comprises a temperature control circuit and an induction coil electrically connected onto the temperature control circuit, and the induction coil spirally winds the heating cavity. The electromagnetic heating type suction device used for heating the non-combustible cigarette has the advantages that a liner heating body is heated electromagnetically via the electromagnetic induction system, and the cigarette is heated by the liner heating body, so that heating speed can be increased, heating efficiency and heating speed are high, transient heating can be realized, needs for satisfying suction taste are met, heating is uniform, and the cigarette can be heated fully to prevent cigarette waste resulted from insufficient heating.
Owner:CHINA TOBACCO SICHUAN IND CO LTD +1

Method and apparatus for preparing material coating by laser inductive composite melt-coating

The invention discloses a method and its device for laser to induce the compound melt high performance material coating. The invention heats up and coupling the laser beam and the high frequency electromagnetic induction, and realizes the process of laser compound melt with induction heating. The device includes the laser, the laser conducting device, the laser gathering device, the high frequency induction heater, numerically controlled machine tool, and the workpiece holding device. When the device works, the distance of coating of preparing to deal with workpiece surface and induction heating coil is between 1 and 10 millimeter. The versatility of the invention is strong, so it can do the surface treatment with laser to induce the compound melt high performance material coating in the surface of solid assembly of each material and inner and outer surface of tubular part. The characteristic of melt method lies in utilizing the efficiency high merit of hot spray, cold spray, or supersonic flame spray. And induction heating is done at the time of laser melt. The maximum melt linear speed amounts to 0.5-10 meters per minute, which enhances between one time and ten times to the conventional laser melt. The deposition rate of powder is improved between one time and fifteen times than existing laser melt deposition rate, moreover the melt deposit doesn't have the blowhole and the crack.
Owner:WUHAN HIVALUE INTELASER LTD

Electromagnetic inductive type non-contact charging system and aligning method thereof

The invention discloses an electromagnetic inductive type non-contact charging system and an aligning method thereof. The system comprises a ground electric energy emitting device and a vehicle-mounted electric energy receiving device, wherein the vehicle-mounted electric energy receiving device comprises a display module, a vehicle-mounted part controller, a vehicle-mounted wireless communication module, a vehicle-mounted electric energy receiving module, a battery and a vehicle-mounted receiving coil, and is arranged on a vehicle, the vehicle-mounted receiving coil is arranged below a chassis, the ground electric energy emitting device comprises a ground emitting coil, a ground electric energy emitting circuit, a driving module, a ground part controller and a ground wireless communication module, and is arranged on the ground, and the ground emitting coil is arranged on the top of the ground electric energy emitting device. On the basis of the traditional non-contact charging, a positioning aligning device taking the charging efficiency as the control target is added, so that an automatic optimizing function for the charging efficiency is realized; the system and the method are simple and easy to implement, and whether the current situation is suitable for charging or not can be judged only by monitoring the charging efficiency.
Owner:BEIHANG UNIV
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