Class / Patent application number | Description | Number of patent applications / Date published |
361152000 |
Including particular drive circuit
| 49 |
361144000 |
For lifting or holding
| 18 |
361149000 |
Demagnetizing
| 8 |
361146000 |
Systems for magnetic field stabilization or compensation | 2 |
20130201591 | RESIDUAL MAGNETIC DEVICES AND METHODS - Residual magnetic locks, brakes, rotation inhibitors, clutches, actuators, and latches. The residual magnetic devices can include a core housing and an armature. The residual magnetic devices can include a coil that receives a magnetization current to create an irreversible residual magnetic force between the core housing and the armature. | 08-08-2013 |
20140078636 | SYSTEMS AND METHODS FOR MAGNETIC SHIELDING - Systems and methods for magnetic shielding are described. A magnetic shield formed of a material having a high magnetic permeability may be degaussed using a toroidal degaussing coil. The toroidal degaussing coil may enclose at least a portion of the shield. Magnetic field gradients may be actively compensated using multiple magnetic field sensors and local compensation coils. Trapped fluxons may be removed by an application of Lorentz force wherein an electrical current is passed through a superconducting plane. | 03-20-2014 |
361147000 |
With permanent magnet | 2 |
20110279944 | Device For Moving Magnetic Nanoparticles Through Tissue - The movement of magnetically responsive nanoparticles through a membrane is significantly enhanced by varying the direction of the magnetic field gradient at the membrane. A device for generating the varying-gradient magnetic field includes a primary magnet having a primary magnetic field gradient direction, one or more secondary magnets directed at an acute angle relative to the primary magnetic field gradient direction, and a controller connected to at least the secondary magnets. The controller is operable to repetitively vary the direction of the resultant magnetic field gradient in a pulsating manner. | 11-17-2011 |
20150062770 | ENERGY EFFICIENT BI-STABLE PERMANENT MAGNET ACTUATION SYSTEM - Bi-stable permanent magnet actuation is a technique employed to move and magnetically hold an armature in electromechanical devices including some valves, wherein, permanent magnets are employed in a manner that places their magnetic field in a bi-stable state to allow a control coil to divert the permanent magnet's magnetic field in one of two directions within the surrounding magnetic material. Control is established using an actuation system comprising, a power source to deliver the desired level of energy, a voltage conditioner such as a DC/DC converter matched to the power source and electromechanical device, an energy storage device such as a capacitor, an output circuit such as an H-Bridge switching circuit, and a control circuit for controlling delivery of short duration current pulses from the energy storage device through the output circuit to the electromechanical device's control coil. Thus, an energy efficient bi-stable permanent magnet actuation system is produced. | 03-05-2015 |
Entries |
Document | Title | Date |
20080218928 | COIL-DRIVING APPARATUS OF ELECTRONIC MAGNETIC CONTACTOR - A coil-driving apparatus of an electro magnetic contactor is disclosed, which replaces the main units in an analog scheme with those in a digital scheme using a PWM controller of low power consumption to reduce the number of the analog components, minimize power consumption, and controls a constant voltage that flows on the coil by receiving the feedback current flowing on the coil, whereby error and defect generation rates are reduced, and deterioration and burning of components are prevented. | 09-11-2008 |
20080316669 | Method and an Array for Magnetizing a Magnetizable Object - Described is a method and array for magnetizing a magnetizable object. The method includes the steps of (a) applying a first degaussing signal to the magnetizable object to degauss the magnetizable object and the first degaussing signal is an alternating electrical signal having a first frequency and a first amplitude; (b) applying a magnetizing signal to the degaussed magnetizable object to magnetize the magnetizable object; and (c) applying a second degaussing signal to the magnetized magnetizable object to partially degauss the magnetized magnetizable object and the second degaussing signal is an alternating electrical signal having a second frequency and a second amplitude. | 12-25-2008 |
20100014207 | DEVICE FOR ACTUATING AN ACTUATOR - The invention relates to an apparatus ( | 01-21-2010 |
20100134944 | MAGNETIC COUPLER DEVICE AND MAGNETICALLY COUPLED ISOLATOR - In a magnetic coupler device comprising: a magnetic field generation circuit generating a magnetic field according to an input current; and a detection bridge circuit including a pair of magnetoresistance effect devices, a resistance value of each of the magnetoresistance effect devices changing by applying a magnetic field generated by said magnetic field generation circuit to each of the magnetoresistance effect devices, and having two outputs between which a voltage difference is generated according to an intensity of the magnetic field generated by said magnetic field generation circuit, by forming a geometric shape of each of said magnetic field generation circuit and said detection bridge circuit in line symmetric or point symmetric, a high S/N ratio is obtained even with high frequency. | 06-03-2010 |
20100149716 | System and method for reducing quiescent power draw and machine using same - A machine includes a plurality of electronic controllers electrically connected to an electrical power source along a first electrical circuit through a first relay and along a second electrical circuit through a second relay. A relay controller is directly connected to the electrical power source along a third electrical circuit, and is in communication with the first relay and the second relay. The relay controller is configured to open or close the first relay or the second relay in response to a power requirement indication. | 06-17-2010 |
20100226058 | Method for Progressively Introducing Current into a Superconducting Coil Mounted on a Former - A method for progressively introducing current into, or removing current from, a superconducting coil mounted on a former, in which the coil vibrates relative to the former. | 09-09-2010 |
20110038091 | METHOD AND ARRANGEMENT FOR THE SENSORLESS OPERATION OF MAGNETIC BEARINGS - A sensor system for a magnetic hearing, which has two actuator coils, two clocked power output stages, a current sensor for detecting those currents in the actuator coils which are encumbered with a ripple current, and a sensor interface. The clocked power output stages provide a pulse-width-modulated output voltage, the pulse width of which is narrowed or widened by small amounts in a predefined order, and the pulse widths of the clocked power output stages are modulated in a fixed phase relationship with respect to one another. The sensor system specifies a sensor system for a magnetic bearing with a clocked power output stage. A magnetic bearing, a control device for a magnetic bearing and a method for detecting the position in a magnetic bearing are also disclosed. | 02-17-2011 |
20110116200 | MAGNETIC FIELD GENERATING MEANS - A magnetic-field generating device includes at least one magnetic-field generator configured to generate a magnetic field so as to provide at least one magnetic gap for receiving objects upon which the magnetic field acts. At least one magnetic-field measuring device is disposed within a measuring-device receiving region outside of the magnetic gap. The at least one magnetic-field measuring device is configured to provide at least one measurement signal useable as an input signal for controlling the at least one magnetic-field generator. | 05-19-2011 |
20110199712 | Degaussing Apparatus with Highly Uniform Magnetic Field - Generation of an intense magnetic field to erase high coercivity magnetic media uses delivery of energy to a degaussing cavity. To conserve energy storage and delivery requirements and to obtain a desired magnetic strength generally uniformly within the cavity, strategic placement of supplemental turns at ends of the magnetic field generating coil wound around the cavity can promote uniformity. Construction of at least cavity ends from an adequate quantity of magnetically soft ferrous material can also promote uniformity. A combination of both approaches is possible. | 08-18-2011 |
20110216465 | ELECTROMAGNETIC SYSTEM WITH NO MUTUAL INDUCTANCE AND AN INDUCTIVE GAIN - An electromagnetic system consists of an electric circuit comprising two solenoids wired in series, one mounted either side and proximate to a toroid. Voltage is applied across the toroid and the solenoids in a specific sequence which alters the inductance behaviour of the system, resulting in an inductance gain and no mutual inductance between the toroid and the two solenoids. | 09-08-2011 |
20120281330 | Magnetic Manipulation and Navigation System for a Magnetic Element - A magnetic manipulation and navigation system for moving a magnetic element through a body comprising at least six electromagnets fixed in relation to said body and a control unit supplying the current for the electromagnets. The electromagnets have soft magnetic cores and the current supplied by the control unit to each of the electromagnets is adapted to operate the electromagnetic coils of each of the electromagnets in their core's linear regions being delimited by the value of the flux density of each electromagnet being in an interval between the negative and positive saturation value of each electromagnet, the lower representation showing the deviation due to the use of soft magnetic cores in all electromagnets. | 11-08-2012 |
20130003245 | FOCUSING DEVICE FOR LOW FREQUENCY OPERATION - An example apparatus for obtaining a desired magnetic field distribution from an incident magnetic field, such as a kHz magnetic field, comprises a structure receiving the incident magnetic field and generating the desired magnetic field distribution at a predetermined distance from the transmitting side of the apparatus. The desired magnetic field distribution results from a spatial distribution of induced electrical current over the structure. Examples of the invention also include design methods and methods of using the apparatus. | 01-03-2013 |
20130010397 | ELECTROMAGNETIC VIBRATION SUPPRESSION DEVICE AND ELECTROMAGNETIC VIBRATION SUPPRESSION CONTROL PROGRAM - An electromagnetic vibration suppression device | 01-10-2013 |
20130128407 | Field Emission System and Method - An improved field emission system and method is provided that involves field emission structures having electric or magnetic field sources. The magnitudes, polarities, and positions of the magnetic or electric field sources are configured to have desirable correlation properties, which may be in accordance with a code. The correlation properties correspond to a desired spatial force function where spatial forces between field emission structures correspond to relative alignment, separation distance, and the spatial force function. | 05-23-2013 |
20130163140 | METHOD AND A DEVICE FOR ATTRACTING MAGNETIC PARTICLES TO A SURFACE - The invention relates to a method for attracting magnetic particles ( | 06-27-2013 |
20130170089 | MAGNETIC SYSTEM FOR PARTICLE ATTRACTION IN A PLURALITY OF CHAMGERS - The invention relates to a magnetic sample-processing device, particularly a sensor device ( | 07-04-2013 |
20130201590 | ACTUATOR DEVICE AND DRIVING METHOD - An actuator device ( | 08-08-2013 |
20130242452 | MAGNETIC ENERGY-TRANSMITTING ELEMENT AND POWER SUPPLY FOR CANCELLING OUT ELECTRICAL NOISE - The present invention relates to a transmitter and power supply which suffers little EMI deviation and provides adequate margin even in volume production, and which can cut the unit price of transformers and economize on the costs of EMI filters, by cancelling out and eliminating the conducted noise or the conducted noise and radiated noise caused by capacitive coupling between the windings of a transformer, the transformer being of an uncomplicated construction which is good in terms of production. | 09-19-2013 |
20130308243 | Magnetically Movable Objects Over a Display of an Electronic Device - In one implementation, the present disclosure provides a method for imparting motion to a magnetically movable object. The method includes disposing the magnetically movable object over a display of an electronic device. The method further includes imparting motion to the magnetically movable object by adjusting a magnetic field that is produced by a magnetic field source, the magnetic field being applied to the magnetically movable object through the display of the electronic device. The adjusting the magnetic field can be based on a location of the magnetically movable object over the display. Furthermore, the display can be a touch sensitive display and the adjusting the magnetic field can be based on touch input of the touch sensitive display. The imparting motion can include moving the magnetically movable object around the display. | 11-21-2013 |
20140063676 | Ferrite-induced spatial modification of EM field patterns - An apparatus for exciting a rotating field pattern in a cavity containing an object, the apparatus comprising a radiating element configured to excite an electromagnetic (EM) field pattern in the cavity, wherein the EM field pattern is excited with EM energy at a frequency in the radio-frequency (RF) range, a field rotating element configured to rotate the EM field pattern, wherein the field rotating element has an anisotropy, the anisotropy selected from magnetic anisotropy, electric anisotropy, and a combination of magnetic and electric anisotropies, and a controller configured to determine the EM field pattern according to value indicative of energy absorbable by the object and to control the anisotropy of the field rotating element in order to rotate the EM field pattern. | 03-06-2014 |
20140347778 | SWITCHING DEVICE - A switching device includes at least a first input and a second input, as well as at least a first output and a second output. The first input is connected with the first output through a first controller and a first switch contact pair. The second input is connected with the second output through a second controller and a second switch contact pair. The switching device further includes a transformer with a core. The first controller forms at least a first coil of the transformer and the second controller forms at least a second coil of the transformer. A switch arrangement is configured to maintain an unsaturated state of the core. | 11-27-2014 |
20140376145 | Method For Controlling Electronic Apparatus And Electronic Apparatus - A method for controlling an electronic apparatus is described where the electronic apparatus includes a first body, a second body on which a touch display unit is provided, and a rotary shaft used to connect the first body and the second body and through which the second body can rotate relative to the first body. The method includes determining whether the electronic apparatus is under a predetermined condition, so as to obtain a determination result; and when the determination result indicates that the electronic apparatus is under the predetermined condition, increasing a rotation resistance that the rotary shaft experiences during rotation of the rotary shaft, so as to cause the second body to reside in a non-rotational state relative to the first body when a user is touching the touch display unit. | 12-25-2014 |
20180025838 | INDUCTOR, IN PARTICULAR FOR MAGNETICALLY COUPLED ENERGY TRANSFER, AS WELL AS METHOD FOR OPERATING AN INDUCTOR OF THIS TYPE | 01-25-2018 |