41results about How to "Induced current" patented technology

In vivo medical stimulation probes include an elongate lead having at least one stimulation electrode disposed on a distal portion thereof. The probes may include a plurality of axially spaced apart RF chokes disposed on and / or in an axially extending shielding layer of the lead in advance of the at least one electrode to inhibit induced RF current from forming and / or traveling along the shielding layer.

Method and system are disclosed for reducing mutual EM coupling between VCO resonators and for implementing the same on a single semiconductor chip. The method and system involve using inductors that are substantially symmetrical about their horizontal and / or their vertical axes and providing current to the inductors in a way so that the resulting magnetic field components tend to cancel each other by virtue of the symmetry. In addition, two such inductors may be placed near each other and oriented in a way so that the induced current in the second inductor due to the magnetic field originating from first inductor is significantly reduced. The inductors may be 8-shaped, four-leaf clover-shaped, single-turn, multi-turn, rotated relative to one another, and / or vertically offset relative to one another. This Abstract is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.

An adaptive architecture for electric motors, generators and other electric machines. An adaptive electric machine provides optimal performance by dynamically adapting its controls to changes in user inputs, machine operating conditions and machine operating parameters. Isolating the machine's electromagnetic circuits allows effective control of more independent machine parameters, enabling greater freedom to optimize and providing adaptive motors and generators that are cheaper, smaller, lighter, more powerful, and more efficient than conventional designs. An electric vehicle with in-wheel adaptive motors enables delivery of higher power with lower unsprung mass, giving better torque-density. The motor control system can adapt to the vehicle's operating conditions, including starting, accelerating, turning, braking, and cruising at high speeds, thereby consistently providing higher efficiency. A wind powered adaptive generator can adapt to changing wind conditions, consistently providing optimal performance. An adaptive architecture may improve performance in a wide variety of electric machine applications, particularly those requiring optimal efficiency over a range of operating conditions.

Method and system are disclosed for reducing mutual EM coupling between VCO resonators and for implementing the same on a single semiconductor chip. The method and system involve using inductors that are substantially symmetrical about their horizontal and / or their vertical axes and providing current to the inductors in a way so that the resulting magnetic field components tend to cancel each other by virtue of the symmetry. In addition, two such inductors may be placed near each other and oriented in a way so that the induced current in the second inductor due to the magnetic field originating from first inductor is significantly reduced. The inductors may be 8-shaped, four-leaf clover-shaped, single-turn, multi-turn, rotated relative to one another, and / or vertically offset relative to one another. This Abstract is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. 37 CFR 1.72(b).

A device having an electric antenna and a magnetic antenna is described, the antennas being spatially arranged in immediate mutual proximity. The electric antenna has at least one current-carrying electric conductor which acts as a resonator for the electric antenna, while the magnetic antenna has a coil with at least one current-carrying conductor loop which acts as an inductor of the magnetic antenna. Thus the electric antenna and the magnetic antenna are spatially arranged relative to each other such that the direction of the current in the electric conductor of the electric antenna extends substantially at right angles to the direction of the current in the conductor loop of the magnetic antenna.

A conducting sheath is provided along at least a portion of an implantable medical device lead, and preferably along substantially its entire length, for mitigating heating problems arising during magnetic resonance imaging (MRI) procedures, particularly problems arising due to a problem described herein as the “coiling effect.” During device implant, the clinician may elect to wrap or coil excess proximal portions of leads around or under the medical device being implanted. Thereafter, during MRI procedures, shunt capacitance may develop between the housing of the implantable device and insulated coils within the proximal portions of the lead that are near the device, resulting in greater lead heating during the MRI. The conducting sheath helps suppress induced currents and also reduces or eliminates shunt capacitance. The conducting sheath may be, for example, formed using a metal mesh or a conducting polymer tube incorporating non-ferrous metal powders. The sheath may be formed in ¼ wavelength segments.

There is provided an axial gap type rotating electric machine which is small-sized and achieves a high motor efficiency as a drive source having a high torque using, for example, a strong magnet by reducing an energy loss by an induced current. An axial gap type rotating electric machine having a yoke on a side of a rotor in a circular plate shape fixed to a rotating shaft, a yoke 23 on a side of a stator in a circular plate shape opposed to the yoke on the side of the rotor, a magnet fixed to a side of an opposed face of either one of the yokes on the side of the rotor or the side of the stator, a plurality of teeth 24 arranged on a side of an opposed face of other yoke on the side of the rotor or the side of the stator radially and opposedly to the magnet and fixed to the yoke 23, and a coil wound around each of the plurality of teeth, in which the teeth 24 has a laminated member of plate members 124 for the teeth and faces 124a to be superposed of the plate members 124 for the teeth are arranged in a circumferential direction.

A medical device includes a pulse generator and a filter. The pulse generator is configured to generate a stimulation signal and to provide the stimulation signal to tissue of a patient via an implantable lead assembly. The filter is configured to couple to the implantable lead assembly. A combined impedance of the implantable lead assembly and the filter with respect to a current induced by an external electro-magnetic field satisfies an impedance threshold when the external electro-magnetic field has a first frequency and when the external electro-magnetic field has a second frequency. The combined impedance has a peak impedance value when the external electro-magnetic field has a third frequency that is between the first frequency and the second frequency.

Embodiments of the invention prevent the write element lead wires from inducing crosstalk current in the read element lead wires. In one embodiment, a magnetic head slider comprises: a substrate portion; a heating resistor formed on the substrate portion through the intermediary of an insulation layer; a magnetic write element and a magnetic read element which are formed over the heating resistor through the intermediary of an insulation layer; and a terminal array structure provided with first terminals to wire the magnetic write element, second terminals to wire the magnetic read element, and third terminals to wire the heating resistor, wherein two of the third terminals for the heating resistor are located respectively on the opposite outer sides of the first and second terminals. In addition, an arm suspension is provided with a wiring structure in which wires connected to the terminals of the magnetic head slider, wires connected to the terminals, and wires connected to the terminals are guided to a predetermined direction and the magnetic write element lead wires are separated from the magnetic read element lead wires by the wires located in the central portion.

A nuclear magnetic resonance apparatus comprises a superconducting magnet that produces a static magnetic field, a probe having a probe coil that irradiates an RF pulse magnetic field and receives a free induction decay signal (FID signal) emitted therefrom, an RF power source that supplies the probe with an RF current, an amplifier that amplifies the FID signal, a detector that detects a signal, and an analyzer that analyzes the signal detected by the detector, wherein the probe coil includes a solenoid coil and a saddle type coil.

A multipurpose mosquito trap lamp base includes a base that admits light, a holder frame mounted in the base and holds an induced-draft fan at the front side and an ultraviolet lamp at the rear side, a hollow shell coupled to the rear side of the base for trapping mosquitoes, a filter cap capped on the rear side of the hollow shell for removing dust from air passing through the hollow shell, and an ozone generator mounted inside the base for generating ozone to sterilize air passing through the base and the hollow shell and the filter cap.

An electrothermal heater (2) for an ice protection system for an aircraft (1) or the like is provided with improved protection against lightning strikes. The heater (2) comprises a laminated heater mat (3) formed from dielectric layers (51-54) and a heater element (501). A first connector (41) has a first end (415) which is embedded in the heater mat (3) and is electrically connected to the heater element (501) and a second end which extends away from the heater mat for connection to a heater control unit (6). The heater mat (3) further includes first and second conductive ground planes (71, 72) and the first end (415) of the first connector (41) is positioned between the first and second ground planes so as to be shielded thereby and so as to reduce the current induced therein during a lightning strike.

A receiver coil array for a magnetic resonance imaging system has multiple receiver coil loops that are decoupled from each the by a decoupling circuit that connects a pair of decoupling capacitors between any two of the receiver coil loops. One capacitor of each pair of decoupling capacitors has both ends grounded respectively through diodes of detuning circuits in the different receiver coil loops, and the other capacitor of each pair of decoupling capacitors has both ends grounded respectively through the tuning capacitors of different receiver coil loops. Alternatively the two decoupling capacitors in each pair have one end grounded through the diodes of respective detuning circuit, and the other end grounded through tuning capacitors of another said receiver coil loop.

A self-powered wireless switch includes at least one micro generator and a control panel for transmitting wireless control signals. The micro generator includes a magnet assembly and a coil assembly which are arranged to be moved relatively to one another to generate an induced current within the coil assembly; the coil assembly including an iron core and a wire winding around the outside of the iron core to form a magnetic coil; the magnet assembly including a permanent magnet and magnet conductive plates arranged at two sides of the opposite magnetic poles of the permanent magnet. The self-powered wireless switch enables the magnetic assembly and the coil assembly to move relatively to one another and converts the mechanical energy to electricity, thereby achieving self-power generation and providing electricity to the control panel for transmission of the wireless control signals.

In an electromagnetic induction type speaker apparatus, individual constants are set in such a manner that the following formula is satisfiedN×(R1×R2)1 / 2 / {2 Π×L1×(1−k2)1 / 2}≧20000where R1 is the DC resistance of a primary coil 15: L1 is the inductance of the primary coil 15; N is the number of turns of the primary coil 15; R2 is the DC resistance of the secondary coil 18; L2 is the inductance of the secondary coil 18; and k is the coupling coefficient of the primary coil 15 and the secondary coil 18. In addition, the constants L1 and L2 are selected in such a manner that the ratio of the inductance L1 and the inductance L2 becomes equal to in the ratio of the DC resistance R1 and the DC resistance R2.

A high power kinetic energy generating device comprises: a magnetic group, a magnetically permeable cavity body, and a coil. The magnetic group comprises an upper magnetically permeable member, a lower magnetically permeable member, and a permanent magnet member. A magnetic gap is defined between the upper magnetically permeable member and the lower magnetically permeable member. The magnetically permeable cavity body and the magnetic group form a magnetically permeable cavity. The magnetically permeable cavity body further comprises a middle column arranged in the magnetically permeable cavity. The coil is also arranged in the magnetically permeable cavity, and surrounds the middle column. The middle column extends into the magnetic gap. The magnetic group is displaced relatively to the middle column, so that the middle column moves into contact the upper magnetically permeable member and the lower magnetically permeable member alternately, which changes the direction of magnetic induction lines passing through the coil and therefore generates an induced current.

A receiver coil array for a magnetic resonance imaging system has multiple receiver coil loops that are decoupled from each the by a decoupling circuit that connects a pair of decoupling capacitors between any two of the receiver coil loops. One capacitor of each pair of decoupling capacitors has both ends grounded respectively through diodes of detuning circuits in the different receiver coil loops, and the other capacitor of each pair of decoupling capacitors has both ends grounded respectively through the tuning capacitors of different receiver coil loops. Alternatively the two decoupling capacitors in each pair have one end grounded through the diodes of respective detuning circuit, and the other end grounded through tuning capacitors of another said receiver coil loop.

Methods and systems for recovering, processing, containing, and transporting water obtained from an ice source, i.e., a glacier, ice sheet, ice cap, etc., are described herein. The ice obtained from the ice source holds unique properties and is processed as a beverage for consumption having unique properties. Further, the resulting product is produced and transported with minimal human alteration and reduced energy input as compared to conventional methods for packaging water.

Generator rotor comprising a rotor rim and a plurality of permanent magnet modules and a plurality of anchors arranged at an outer or inner circumference of the rotor rim such that the anchors substantially fix the permanent magnet modules to the rotor, wherein the permanent magnet modules comprise a base having a bottom surface, two axially extending side surfaces and a top surface, and one or more rows of magnets mounted on said top surface, wherein the two side surfaces of the permanent magnet modules each comprise an axially extending groove, and wherein the anchors have a shape that substantially fits exactly in axially extending grooves of neighbouring permanent magnet modules.

The present invention concerns a self-expanding implant device comprising a proximal portion at a first longitudinal end, a distal portion at a second longitudinal opposite the first longitudinal end, and a connecting portion between the proximal portion and the distal portion, wherein the proximal portion and the distal portion each comprise a radially self-expanding structure, wherein the connecting portion comprises longitudinally oriented bendable struts, preferably at least 4 struts, more preferably 6 struts or more, which connect the self-expanding structure of the proximal portion with the self-expanding structure of the distal portion, wherein in a fully expanded state, the implant device comprises a maximum implant diameter along a direction perpendicular to the longitudinal direction and wherein the struts of the connecting portion comprise a strut length along the longitudinal direction, characterized in that the strut length is such that when the self-expanding structure of the proximal portion is in a compacted state and the self-expanding structure of the distal portion is not constrained radially, the self-expanding structure of the distal portion reaches a semi-expanded state comprising a diameter which is at least 60% of the maximum implant diameter.

A device having an electric antenna and a magnetic antenna is described, the antennas being spatially arranged in immediate mutual proximity. The electric antenna has at least one current-carrying electric conductor which acts as a resonator for the electric antenna, while the magnetic antenna has a coil with at least one current-carrying conductor loop which acts as an inductor of the magnetic antenna. Thus the electric antenna and the magnetic antenna are spatially arranged relative to each other such that the direction of the current in the electric conductor of the electric antenna extends substantially at right angles to the direction of the current in the conductor loop of the magnetic antenna.

A medical implantable lead adapted to be implanted into a human or animal body for monitoring and / or controlling of an organ inside the body has a fixation in a distal end, which is adapted to fix a distal end of the lead to the organ, an electrode member in the distal end adapted to be in contact with tissue of the organ and receive and / or transmit electrical signals from and / or to the organ, and at least one electrically conducting coil, which includes one or more electrically conducting helical wires and that is adapted to connect the electrode member in the distal end with a monitoring and / or controlling device in a proximal end of the lead. One or more of the individual wires of the coil has a wire core that is provided with a surrounding electrically insulating layer, which in turn is provided with a surrounding electrically conducting shield layer, and the coil is close lapped such that electrically conducting shield layers of adjacent loops of the coil are in electrical contact with each other.

Embodiments of the invention prevent the write element lead wires from inducing crosstalk current in the read element lead wires. In one embodiment, a magnetic head slider comprises: a substrate portion; a heating resistor formed on the substrate portion through the intermediary of an insulation layer; a magnetic write element and a magnetic read element which are formed over the heating resistor through the intermediary of an insulation layer; and a terminal array structure provided with first terminals to wire the magnetic write element, second terminals to wire the magnetic read element, and third terminals to wire the heating resistor, wherein two of the third terminals for the heating resistor are located respectively on the opposite outer sides of the first and second terminals. In addition, an arm suspension is provided with a wiring structure in which wires connected to the terminals of the magnetic head slider, wires connected to the terminals, and wires connected to the terminals are guided to a predetermined direction and the magnetic write element lead wires are separated from the magnetic read element lead wires by the wires located in the central portion.

An adjustable audio cable vibration reducing device for minimizing cable vibration. The device has two porous vertical pieces and at least one horizontal supporting piece. The length of the porous vertical pieces can be selected appropriately, as can the height of the horizontal supporting pieces. Multiple horizontal supporting pieces can be utilized to support several cables simultaneously. Sound can be tuned by changing the material of the horizontal supporting pieces or porous vertical pieces. Vibration can be transformed into heat energy by filling energy-transforming holes with a suitable material, such as rubber or foam.

The present invention provides methods and compositions relating to the use of late passage mesenchymal stem cells (MSCs) for treatment of cardiac rhythm disorders. The late passage MSCs of the invention may be used to provide biological pacemaker activity and / or provide a bypass bridge in the heart of a subject afflicted with a cardiac rhythm disorder. The biological pacemaker activity and / or bypass bridge may be provided to the subject either alone or in tandem with an electronic pacemaker.

A power supply apparatus includes: a transformer which converts input power supplied to a primary winding to be induced to a secondary winding; a current detector which detects an output current of the secondary winding of the transformer; a voltage detector which detects an output voltage of the secondary winding of the transformer; a switch which adjusts the output voltage outputted by the transformer; and a controller which controls the switch to maintain output power obtained by multiplying the output current by output voltage, within a predetermined level.

The present invention provides methods and compositions relating to the use of late passage mesenchymal stem cells (MSCs) for treatment of cardiac disorders. Such late passage MSCs may be administered to the myocardium of a subject for induction of native cardiomyoctye proliferation and repair of cardiac tissue. Additionally, the late passage MSCs may be genetically engineered to express a gene encoding a physiologically active protein of interest and / or may be incorporated with small molecules for delivery to adjacent target cells through gap junctions. The late passage MSCs of the invention may be used to provide biological pacemaker activity and / or provide a bypass bridge in the heart of a subject afflicted with a cardiac rhythm disorder. The biological pacemaker activity and / or bypass bridge may be provided to the subject either alone or in tandem with an electronic pacemaker.