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公开(公告)号：US11521777B2
公开(公告)日：2022-12-06
申请号：US17699240
申请日：2022-03-21
发明人： Zhiyin Sun , Liyi Li , Donghua Pan , Kai Song , Yuxi Liu , Yinxi Jin , Zhilong Zou
IPC分类号： H01F13/00
摘要： A demagnetization method for a multilayer shielding apparatus is provided. In the demagnetization method, the demagnetization is realized on the basis of a demagnetization coil system. The demagnetization coil system includes a plurality of turns of demagnetization coils (2), a plurality of connection wires and a power supply module. The multilayer shielding apparatus includes at least two layers of shielding bodies (1); all the layers of shielding bodies (1) are sleeved layer by layer from inside to outside; a plurality of turns of demagnetization coils (2) are wound on each layer of shielding bodies (1) at intervals; and one half of each turn of demagnetization coils (2) is located inside the wound shielding bodies (1), and the other half is located outside the wound shielding bodies (1). Each demagnetization coil (2) is connected to the power supply module through the corresponding connection wire.
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公开(公告)号：US09621085B2
公开(公告)日：2017-04-11
申请号：US15023403
申请日：2014-09-09
发明人： Liyi Li , Donghua Pan , Qingbo Guo , Mingyl Wang , Siya Xiong
IPC分类号： H02P7/025 , H01F7/06 , H01F7/128 , H02P7/03 , H02P25/034
CPC分类号： H02P7/025 , H01F7/066 , H01F7/128 , H02P7/04 , H02P25/034
摘要： A thrust compensation system of a dual-winding voice coil motor, which is used for driving the voice coil motor having secondary windings arranged between each pair of main windings, wherein the main windings are the main working windings of the voice coil motor and used for providing the output electromagnetic force required by the driving system of the voice coil motor; the secondary windings are compensation windings and used for providing the thrust ripple opposite to the main windings and compensating the thrust ripple of the main windings, so that the resultant force of the output thrust of the main windings and the secondary windings of the voice coil motor is constant. The scheme provided by this invention not only greatly reduces the thrust ripple of the servo system of the voice coil motor, but also realizes the ultra-high precision control of the servo drive system of the voice coil motor when the system is under low switching frequency, improves the stability of the system, reduces the system loss, and greatly reduces the cost of the drive controller.
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公开(公告)号：US09621084B2
公开(公告)日：2017-04-11
申请号：US15023401
申请日：2014-09-09
发明人： Liyi Li , Donghua Pan , Qingbo Guo , Chengming Zhang , Jiwei Cao
IPC分类号： H02K41/00 , H02P7/025 , H02P25/034 , H02K41/035
CPC分类号： H02P7/025 , H02K41/0356 , H02K2213/03 , H02P25/034
摘要： A thrust compensation system of a dual-winding voice coil motor, which is used for driving the voice coil motor having main windings (100) and secondary windings (200), wherein the secondary windings (200) of the voice coil motor are between each pair of the main windings (100). The system includes a switch drive circuit of the main windings (800) which is powered by a first controlled voltage source to drive the main windings (100) adopted as the main working windings of the voice coil motor and used for providing the output electromagnetic force required by the driving system of the voice coil motor in work; a switch drive circuit of the secondary windings (900) which is powered by a second voltage source to drive the secondary windings (200) adopted as compensation windings, and used for providing the thrust ripple opposite to the main windings (100) so as to compensate the thrust ripple of the main windings (100) and keep the resultant force of the output of the main windings (100) and the secondary windings (200) of the voice coil motor in constant; wherein the voltages Udc1 and Udc2 of the first and second controlled voltage sources of the main windings (100) and the second windings (200) are configured as meeting a certain relationship.
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公开(公告)号：US20160211770A1
公开(公告)日：2016-07-21
申请号：US15023402
申请日：2014-09-09
发明人： Liyi Li , Donghua Pan , Qingbo Guo , Junjie Hong
IPC分类号： H02M7/5387
CPC分类号： H02M7/5387 , H02M1/14 , H02M2001/0054 , H02M2003/1555 , H02P7/04 , Y02B70/1491
摘要： An electromagnetic drive control system comprising an H-shaped full bridge driving circuit connected to a controlled electromagnetic unit, including a first field effect transistor (FET) and a fourth FET connected in series constituting the left arm of the H-shaped full-bridge driving circuit, and a second FET and a third FET connected in series constituting the right arm of the H-shaped full-bridge driving circuit; PWM control unit is used to provide control signal to the FETs of the left and right bridge arms; it is characterized in that: the left arm comprises a first DC voltage source connected in series to the drain of the first FET, and the right arm includes a second DC voltage source connected in series to the drain of the second FET so as to form a dual power circuit; in this configuration, the first DC voltage source and the second DC voltage source are configured appropriately to greatly weaken the output current ripple of the electromagnetic drive control system and allow the system to realize super-high precision control of the electromagnetic drive control system under lower switching frequency, as a result, it can improve the stability of the system, reduce the loss of the system, and significantly decrease the cost of the drive controller.
摘要翻译： 一种电磁驱动控制系统，包括连接到受控电磁单元的H形全桥驱动电路，包括串联构成H形全桥驱动的左臂的第一场效应晶体管（FET）和第四FET 电路，以及构成H形全桥驱动电路的右臂的串联连接的第二FET和第三FET; PWM控制单元用于向左右桥臂的FET提供控制信号; 其特征在于：左臂包括与第一FET的漏极串联连接的第一直流电压源，右臂包括与第二FET的漏极串联连接的第二直流电压源，以形成 双电源电路; 在这种配置中，第一直流电压源和第二直流电压源被适当地配置，以大大削弱电磁驱动控制系统的输出电流纹波，并允许系统实现低电压驱动控制系统的超高精度控制 开关频率，从而可以提高系统的稳定性，减少系统的损耗，大大降低驱动控制器的成本。
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公开(公告)号：US20230128566A1
公开(公告)日：2023-04-27
申请号：US17694812
申请日：2022-03-15
发明人： Donghua Pan , Jinting Wang , Yiding Wang , Jiayu Zhai , Yanlu Chen , Liyi Li
摘要： The disclosure discloses a magnetic stimulation method with a controllable induced field direction, and belongs to the technical field of noninvasive neural regulation. The method includes the following steps: S100, calculating currents i1j, i2j, i3j, j=1, 2, . . . n required to be made to generate a unit-direction vector electric field at a target point Pt, the same below; S200, decomposing a vector electric field E required at the target point to three fundamental vector directions to obtain electric field components E1, E2, E3; S300, calculating currents that may generate the electric field components E1, E2, E3 at the target point, I1j=E1i1j, I2j=E2i2j, I3j=E3i3j; S400, superimposing the currents of the three energization modes to obtain a resultant current Ij=I1j+I2j+I3j=E1i1j+E2i2j+E3i3j to be made of each coil of a coil group, that is, generating a required electric field E at the target point for specific directional simulation.
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公开(公告)号：US11410810B2
公开(公告)日：2022-08-09
申请号：US17667635
申请日：2022-02-09
发明人： Zhiyin Sun , Liyi Li , Donghua Pan , Kai Song , Yuxi Liu , Liguo Tan , Yiyang Zhao
摘要： A distributed demagnetizing coil system, a shielding device, and a demagnetizing method. The system includes turns of demagnetizing coils evenly wound on each shielding surface of a shielding body in the shielding device at intervals and connecting wires provided on outer side of the shielding surface in an inflection manner. One half of each turn is located on inner side of the wound shielding body and the other half of each turn s located on outer side of the wound shielding body for providing corresponding demagnetizing magnetic fields to form a closed magnetic flux loop. One half of each connecting wire is connected to the corresponding demagnetizing coil, the other half of each connecting wire is reversely inflected along an original path and is connected to a power supply module, so that corresponding demagnetizing current is introduced into each demagnetizing coil connected to the connecting wire.
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公开(公告)号：US20220390325A1
公开(公告)日：2022-12-08
申请号：US17831773
申请日：2022-06-03
发明人： Jiwei Cao , Chengming Zhang , Liyi Li , Jiaxi Liu
IPC分类号： G01M13/027
摘要： A three-dimensional force loading device for a motor spindle is provided, and relates to the field of motor spindle testing. The device including a bottom plate; a torque loading assembly configured for testing torque performance of the motor spindle, and the torque loading assembly is in transmission connection with the motor spindle; a sleeve shell rotatably sleeved on the motor spindle, the sleeve shell is fixed along an axis direction of the motor spindle; a radial force loading assembly configured for testing radial force performance of the motor spindle, and the radial force loading assembly is fixedly connected with the sleeve shell; an axial force loading assembly configured for testing axial force performance of the motor spindle; and a intermediate force transmission mechanism connected with the sleeve shell and the axial force loading assembly.
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公开(公告)号：US09620998B2
公开(公告)日：2017-04-11
申请号：US14370582
申请日：2013-01-31
发明人： Liyi Li , Donghua Pan
CPC分类号： H02K1/20 , H02K3/24 , H02K3/47 , H02K9/19 , H02K9/22 , H02K16/00 , H02K41/0356 , H02K2201/18
摘要： A motor cooling and eddy current suppression structure (100), which is attached to the surface of the motor winding (201), includes a first cooling plate (101), a second cooling plate (103,104), and a cooling water circuit located between the first cooling plate and the second cooling plate. The cooling water circuit is configured to allow the cooling fluid to pass through. The first and the second cooling plates are both non-magnetic metallic materials. The first cooling plate is divided into a plurality of individual first regions (301,303) which are corresponding to each pole of the motor by one or more first slits (305) provided on the first cooling plate in the position where the motor poles are combined. Each of the first regions is further divided into an even number of first sub-areas by at least one fist sub-slit (306) where induced electromotive force is generated. Two adjacent first sub-areas in respective first regions are grouped together, and the ends of each first sub-area that has the same polarity are connected in series. The second cooling plate is divided into a plurality of individual second regions which are corresponding to each pole of the motor by one or more second slits provided on the second cooling plate in the position where the motor poles are combined. Each of the second regions is further divided into an even number of second sub-areas by at least one second sub-slit where induced electromotive force is generated. Two adjacent second sub-areas in respective second regions are grouped together, and the ends of each second sub-area that has the same polarity are connected in series. This structure can efficiently reduce the temperature of the motor winding and reduce the induced eddy current.
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公开(公告)号：US20140312718A1
公开(公告)日：2014-10-23
申请号：US14370582
申请日：2013-01-31
发明人： Liyi Li , Donghua Pan
IPC分类号： H02K1/20
CPC分类号： H02K1/20 , H02K3/24 , H02K3/47 , H02K9/19 , H02K9/22 , H02K16/00 , H02K41/0356 , H02K2201/18
摘要： A motor cooling and eddy current suppression structure (100), which is attached to the surface of the motor winding (201), includes a first cooling plate (101), a second cooling plate (103,104), and a cooling water circuit located between the first cooling plate and the second cooling plate. The cooling water circuit is configured to allow the cooling fluid to pass through. The first and the second cooling plates are both non-magnetic metallic materials. The first cooling plate is divided into a plurality of individual first regions (301,303) which are corresponding to each pole of the motor by one or more first slits (305) provided on the first cooling plate in the position where the motor poles are combined. Each of the first regions is further divided into an even number of first sub-areas by at least one fist sub-slit (306) where induced electromotive force is generated. Two adjacent first sub-areas in respective first regions are grouped together, and the ends of each first sub-area that has the same polarity are connected in series. The second cooling plate is divided into a plurality of individual second regions which are corresponding to each pole of the motor by one or more second slits provided on the second cooling plate in the position where the motor poles are combined. Each of the second regions is further divided into an even number of second sub-areas by at least one second sub-slit where induced electromotive force is generated. Two adjacent second sub-areas in respective second regions are grouped together, and the ends of each second sub-area that has the same polarity are connected in series. This structure can efficiently reduce the temperature of the motor winding and reduce the induced eddy current.
摘要翻译： 附接到电动机绕组（201）的表面的电动机冷却和涡流抑制结构（100）包括第一冷却板（101），第二冷却板（103,104）和位于 第一冷却板和第二冷却板。 冷却水回路被构造成允许冷却流体通过。 第一和第二冷却板都是非磁性金属材料。 第一冷却板通过在电动机极组合的位置上设置在第一冷却板上的一个或多个第一狭缝（305）分成多个单独的第一区域（301,303），该第一区域对应于电动机的每个极。 通过产生感应电动势的至少一个第一子狭缝（306）将每个第一区域进一步分成偶数个第一子区域。 各自的第一区域中的两个相邻的第一子区域被分组在一起，并且具有相同极性的每个第一子区域的端部串联连接。 第二冷却板通过在电动机极组合的位置上设置在第二冷却板上的一个或多个第二狭缝分成多个独立的第二区域，其对应于电动机的每个极。 通过产生感应电动势的至少一个第二子狭缝将每个第二区域进一步分成偶数个第二子区域。 相应的第二区域中的两个相邻的第二子区域被分组在一起，并且具有相同极性的每个第二子区域的端部串联连接。 这种结构可以有效地降低电机绕组的温度并降低感应涡流。
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公开(公告)号：US11754467B2
公开(公告)日：2023-09-12
申请号：US17831773
申请日：2022-06-03
发明人： Jiwei Cao , Chengming Zhang , Liyi Li , Jiaxi Liu
IPC分类号： G01M13/027
CPC分类号： G01M13/027
摘要： A three-dimensional force loading device for a motor spindle is provided, and relates to the field of motor spindle testing. The device including a bottom plate; a torque loading assembly configured for testing torque performance of the motor spindle, and the torque loading assembly is in transmission connection with the motor spindle; a sleeve shell rotatably sleeved on the motor spindle, the sleeve shell is fixed along an axis direction of the motor spindle; a radial force loading assembly configured for testing radial force performance of the motor spindle, and the radial force loading assembly is fixedly connected with the sleeve shell; an axial force loading assembly configured for testing axial force performance of the motor spindle; and a intermediate force transmission mechanism connected with the sleeve shell and the axial force loading assembly.
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