公开(公告)号：US11886253B1

公开(公告)日：2024-01-30

申请号：US16289607

申请日：2019-02-28

Applicant: Apple Inc.

Inventor： John C. Difonzo ,  Hao Zhu ,  Bryce W. Wilson ,  Andrea Del Prete ,  Stefano Tizianel ,  Noemi Novello ,  Maurizio Bertoldo

IPC: G06F1/16 ,  H01F13/00 ,  H01F7/02

CPC classification number: G06F1/1679 ,  G06F1/1616 ,  H01F7/0263 ,  H01F13/006

Abstract: This application relates to improving kinematics in a computing device such as a laptop computer. A magnetic latch mechanism includes a magnetic array and an attractor plate. The magnetic array is secured in a top portion of the laptop computer and the attractor plate is secured in a base portion of the laptop computer. An attractive force of the magnetic latch mechanism is calibrated by selectively demagnetizing a portion of one or more magnetic elements in the magnetic array to reduce the attractive force proximate a target force. The calibration technique can include exciting a demagnetizing element, such as a pair of conductive coils, with a short, high frequency demagnetization pulse to create a demagnetized zone within the magnetic array that is completely demagnetized, irrespective of unit to unit variations of magnetic properties in the initially magnetized magnetic array. This technique ensures an accurate kinematic user experience.

公开(公告)号：US20230420171A1

公开(公告)日：2023-12-28

申请号：US18036943

申请日：2021-12-08

Applicant: Maurer Magnetic AG

Inventor： Albert MAURER

IPC: H01F13/00

CPC classification number: H01F13/006

Abstract: An electronic circuit for demagnetizing ferromagnetic material includes a voltage source and a conductor loop connected thereto, a demagnetizing resonant circuit is arranged in the conductor loop for forming a decaying alternating magnetic field. In the conductor loop, a resonant circuit battery switch is arranged in series with the demagnetizing resonant circuit, and a recharge resonant circuit for pulsed recharging of a charging current into the demagnetizing resonant circuit is arranged in parallel with the demagnetizing resonant circuit and with the resonant circuit battery switch. A recharge store which is arranged in parallel with the voltage source, with the recharge resonant circuit and with the demagnetizing resonant circuit, as well as a recharge switch for interrupting a charging current from the recharge store are located in the conductor loop. The circuit can be operated by a controller for controlling the voltage source and all switches.

公开(公告)号：US20180301265A1

公开(公告)日：2018-10-18

申请号：US15822217

申请日：2017-11-27

Applicant: Industrial Technology Research Institute

Inventor： Ming-Hsien Wu ,  Yen-Hsiang Fang ,  Chia-Hsin Chao

IPC: H01F7/20

CPC classification number: H01F7/206 ,  B25J15/0608 ,  H01F13/006 ,  H01L21/67144 ,  H01L33/0095 ,  H05K13/0408 ,  H05K13/041

Abstract: A magnetic transfer module adapted to transfer a plurality of electronic elements. The magnetic transfer module includes an electromagnet and a plurality of transfer unit. The transfer units are connected to the electromagnet, each of the transfer units includes a ferromagnetic material element, and at least one of the transfer units includes a heating element. The electromagnet magnetizes the ferromagnetic material element, such that the ferromagnetic material element magnetically attracts one of the electronic elements. The heating element is disposed between the electromagnet and the ferromagnetic material element, and heats the ferromagnetic material element to demagnetize the ferromagnetic material element while being actuated.

公开(公告)号：US09704637B2

公开(公告)日：2017-07-11

申请号：US14176171

申请日：2014-02-10

Applicant: TEXAS INSTRUMENTS DEUTSCHLAND GMBH

Inventor： Caspar Petrus Laurentius van Vroonhoven ,  Sudarshan Udayashankar ,  Gebhard Haug ,  Mikhail Valeryevich Ivanov

IPC: H01F13/00 ,  H01F27/42 ,  G01R15/18

CPC classification number: H01F13/006 ,  G01R15/185 ,  G01R15/20 ,  H01F27/427

Abstract: Automated degaussing methods and apparatus are presented for degaussing a magnetic core in close loop fashion, in which a plurality of pulses are applied to a compensation coil magnetically coupled with the core with duration or energy being decreased in succeeding pulse cycles according to a discrete feedback algorithm, and with individual pulse polarities being set according to core magnetization polarity measured subsequent to an immediately preceding pulse.

公开(公告)号：US09508479B1

公开(公告)日：2016-11-29

申请号：US14744754

申请日：2015-06-19

Applicant: General Electric Company

Inventor： Eric Steven Buskirk

IPC: H01F13/00

CPC classification number: H01F13/003 ,  H01F13/006 ,  H02K15/03

Abstract: A method for in-situ magnetization of a generator rotor is provided. The generator has a stator and the rotor is located inside the stator. An air gap is formed between an outer radial portion of the rotor and an inner radial portion of the stator. The rotor has a plurality of excitation windings and a plurality of permanent magnets. The method includes the step of applying a current to the excitation windings, and the current is greater than a normal excitation current. A maintaining step maintains the current for a time period sufficient to magnetize the permanent magnets. The magnetization of the permanent magnets occurs on the rotor in-situ and while the rotor is inside the stator.

Abstract translation: 提供了一种用于发电机转子的原位磁化的方法。 发电机具有定子，转子位于定子内部。 在转子的外部径向部分和定子的内部径向部分之间形成气隙。 转子具有多个励磁绕组和多个永磁体。 该方法包括向励磁绕组施加电流并且电流大于正常励磁电流的步骤。 维持步骤将电流保持足以磁化永磁体的时间段。 永磁体的磁化在原位转子上发生，而转子位于定子内部。

公开(公告)号：US09465401B2

公开(公告)日：2016-10-11

申请号：US13863962

申请日：2013-04-16

Applicant: D-Wave Systems Inc.

Inventor： Sergey V. Uchaykin

IPC: G05F7/00 ,  H01L39/04 ,  H01F13/00

CPC classification number: H01L39/02 ,  G05F7/00 ,  G06N99/002 ,  H01F13/006 ,  H01L27/18 ,  H01L39/04 ,  H05K9/0071

Abstract: 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.

公开(公告)号：US09337766B2

公开(公告)日：2016-05-10

申请号：US14343918

申请日：2012-08-02

Applicant: Florian Weinl ,  Michael Pantke

Inventor： Florian Weinl ,  Michael Pantke

IPC: H02K33/00 ,  H02P25/06 ,  H01F7/18 ,  H01F13/00

CPC classification number: H02P25/06 ,  H01F7/1844 ,  H01F13/006 ,  H01F2007/185

Abstract: A method of activating an electromagnetic actuator having at least one coil and a movable armature. The method includes the step in which the electromagnetic actuator is demagnetized by passing a sequence of electric current pulses with a current flow direction which alternates from one current pulse to the next and with a current size which decreases from one current pulse to the next, through the at least one coil, in order to reduce or eliminate any residual magnetic flux density in the electromagnetic actuator. The method also includes a step in which a position of the movable armature is determined, after the demagnetization step, by passing a measurement current pulse through the at least one coil.

Abstract translation: 一种激活具有至少一个线圈和可移动衔铁的电磁致动器的方法。 该方法包括以下步骤：电磁致动器通过使电流脉冲序列通过从一个电流脉冲向下一个电流脉冲交替的电流流动方向和从一个电流脉冲到下一个电流脉冲的电流大小 所述至少一个线圈，以便减少或消除电磁致动器中的任何剩余磁通密度。 该方法还包括在消磁步骤之后通过使测量电流脉冲通过至少一个线圈来确定可动电枢的位置的步骤。

公开(公告)号：US20150371749A1

公开(公告)日：2015-12-24

申请号：US14749350

申请日：2015-06-24

Applicant: Albert MAURER, JR. ,  Marek Rohner ,  Boris Ziegenhagen

Inventor： Albert MAURER, JR. ,  Marek Rohner ,  Boris Ziegenhagen

IPC: H01F13/00

CPC classification number: H01F13/006

Abstract: For an uncontrolled alternating-current demagnetiser (1), comprising an alternating-current circuit (10) and an AC voltage source (100), wherein the alternating-current circuit (10) allows the AC voltage loading, by means of the actuation of a switch (S), of a parallel resonant circuit (P) comprising a demagnetising coil (L) and a parallel capacitor (C1) connected in parallel to the demagnetising coil (L), the option should be created to minimise the error proneness during demagnetisation, even of users, who do not have any knowledge of the processes during the demagnetisation. This is achieved in that the alternating current in the inductance L freely decays when the semiconductor element D is switched off. To limit the inrush current owing to the parallel capacitor C1, at least one electronic component (D) is arranged in series to the AC voltage source (100) and can be operated by means of switch (S). The alternating-current circuit (10) is in this case switched on exactly at the zero passage of the AC voltage source (100). A series capacitor (C2) is expediently connected in series with the demagnetising coil (L) in the alternating-current circuit (10).

Abstract translation: 对于不受控制的交流消磁器（1），包括交流电路（10）和交流电压源（100），其中所述交流电路（10）通过所述交流电压 包括与去磁线圈（L）并联连接的去磁线圈（L）和并联电容器（C1）的并联谐振电路（P）的开关（S），应该创建该选项以最小化在 退磁，即使是在退磁过程中也不知道过程的使用者。 这实现了当半导体元件D断开时电感L中的交流电自由衰减。 为了限制由于并联电容器C1引起的浪涌电流，至少一个电子部件（D）与AC电压源（100）串联布置，并且可以通过开关（S）来操作。 在这种情况下，交流电路（10）在AC电压源（100）的零通过时正好接通。 串联电容器（C2）与交流电路（10）中的去磁线圈（L）有效地连接。

公开(公告)号：US09144865B2

公开(公告)日：2015-09-29

申请号：US14543210

申请日：2014-11-17

Applicant: Miha Zakotnik ,  Peter Afiuny ,  Scott Dunn ,  Catalina Oana Tudor

Inventor： Miha Zakotnik ,  Peter Afiuny ,  Scott Dunn ,  Catalina Oana Tudor

IPC: B22F1/00 ,  B23P19/04 ,  H01F1/057 ,  H01F1/08 ,  H01F41/02 ,  H01F41/00 ,  B01J10/00 ,  B22F9/04 ,  B23P23/04 ,  B23Q7/02 ,  B23Q7/12 ,  H01F13/00

CPC classification number: H01F41/0253 ,  B01J10/005 ,  B22F1/0003 ,  B22F1/0088 ,  B22F3/10 ,  B22F3/24 ,  B22F8/00 ,  B22F9/04 ,  B22F2009/041 ,  B22F2998/10 ,  B23P19/04 ,  B23P23/04 ,  B23Q7/02 ,  B23Q7/12 ,  C22C38/002 ,  C22C38/005 ,  C22C38/06 ,  C22C38/08 ,  C22C38/10 ,  C22C38/14 ,  H01F1/0536 ,  H01F1/057 ,  H01F1/0573 ,  H01F1/0577 ,  H01F1/086 ,  H01F13/006 ,  H01F41/00 ,  H01F41/0266 ,  Y02P10/24 ,  Y02W30/541 ,  Y10T29/49755 ,  Y10T29/49757 ,  Y10T29/49821 ,  Y10T29/53274 ,  Y10T29/53404 ,  Y10T83/202 ,  B22F1/0085

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for recycling magnetic material. One of the systems includes a gas mixing apparatus for fragmenting and mixing waste magnetic material comprising a plurality of reaction vessels, each of the plurality of reaction vessels comprising an internal liner having a plurality of openings defined therein, each of the internal liners configured to receive magnetic material and facilitate the circulation of gas around the magnetic material through the plurality of openings, and a pump and valve assembly operatively coupled to the plurality of reaction vessels to control the introduction of gas into the plurality of reaction vessels and to control transfer of gas between the plurality of reaction vessels.

Abstract translation: 方法，系统和装置，包括在计算机存储介质上编码的用于再循环磁性材料的计算机程序。 其中一个系统包括气体混合装置，用于将包含多个反应容器的废磁材料碎裂和混合，所述多个反应容器中的每个反应容器包括内衬，其中限定有多个开口，每个内衬被配置成接收 磁性材料并且促进通过多个开口在磁性材料周围的气体的循环，以及可操作地耦合到多个反应容器的泵和阀组件，以控制将气体引入到多个反应容器中并控制气体的转移 在多个反应容器之间。

公开(公告)号：US09113705B1

公开(公告)日：2015-08-25

申请号：US14258830

申请日：2014-04-22

Applicant: Wipro Limited

Inventor： Jejju Jacob ,  Puneet Makkar

IPC: F25D23/00 ,  A47B57/06 ,  F25D25/02

CPC classification number: A47B57/10 ,  A47B51/00 ,  A47B57/08 ,  F16B1/00 ,  F16B2001/0035 ,  F16H19/04 ,  F25D23/00 ,  F25D25/02 ,  F25D25/04 ,  H01F13/006

Abstract: An adjustable shelving assembly includes at least two support rails, at least one geared rack provided in each of the at least two support rails, and an actuating mechanism placed adjacent to the at least one geared rack. The actuating mechanism is configured to support at least one shelf and facilitates movement of the at least one shelf along the at least two support rails. The actuating mechanism includes a pinion mating with the at least one geared rack, a plurality of permanent magnets mounted coaxially inside the pinion, ferromagnetic disks provided on either ends of the pinion, and a shaft placed axially in the pinion, connecting the permanent magnets. The permanent magnets magnetize or demagnetize the ferromagnetic disks when the shaft is rotated for locking or unlocking the at least one shelf.

Abstract translation: 可调节的搁架组件包括至少两个支撑轨道，设置在所述至少两个支撑轨道中的每一个中的至少一个齿轮架，以及邻近所述至少一个齿轮架设置的致动机构。 所述致动机构构造成支撑至少一个货架并便于所述至少一个货架沿着所述至少两个支撑轨道移动。 所述致动机构包括与所述至少一个齿轮架配合的小齿轮，同轴地安装在所述小齿轮内的多个永磁体，设置在所述小齿轮的任一端上的铁磁盘和轴向设置在所述小齿轮中的轴，连接所述永磁体。 当轴旋转以锁定或解锁至少一个货架时，永磁体使铁磁盘磁化或消磁。