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1. 发明授权

US07180389B2 EMI filter and frequency filters having capacitor with inductance cancellation loop 有权
标题翻译： EMI滤波器和具有电感消除回路的电容器的滤波器
公开(公告)号：US07180389B2
公开(公告)日：2007-02-20
申请号：US11013930
申请日：2004-12-17
申请人： Shuo Wang , Fred C. Lee , Williem Gerhardus Odendaal
发明人： Shuo Wang , Fred C. Lee , Williem Gerhardus Odendaal
IPC分类号： H03H7/09
CPC分类号： H04B3/28 , H03H7/175 , H03H7/1758 , H03H7/1766 , H03H7/1775 , H03H7/427 , H03H2001/005
摘要： An electromagnetic interference (EMI) filter or frequency filters (e.g. bandpass or band reject filters) in which a capacitor has an inductance cancellation loop. Inductive coupling between capacitors can allow undesired high frequencies to propagate across a filter. This is particularly a concern when the capacitors are oriented in parallel. In the present invention, the inductance cancellation loop is disposed adjacent to one capacitor so that mutual inductance between the capacitors is reduced. The attenuation of the filter at high frequencies is thereby increased. The loop can increase voltage attenuation of an EMI filter by about 20 dB. In another aspect, inductors in the filter are oriented horizontally relative to a circuitboard. Horizontal orientation reduces leakage inductance coupling between the inductors and circuitboard traces, and between the inductor and capacitors, thereby preventing unwanted propagation of high frequencies. Both measures in combination can provide a voltage attenuation increase of 30 dB.
摘要翻译：电磁干扰（EMI）滤波器或频率滤波器（例如带通或带阻滤波器），其中电容器具有电感消除环路。电容器之间的感应耦合可以使不期望的高频率在滤波器上传播。当电容器并联取向时，这尤其值得关注。在本发明中，电感消除环路被设置成与一个电容器相邻，使得电容器之间的互感减小。因此，高频下的滤波器的衰减增加。该环路可以将EMI滤波器的电压衰减提高约20 dB。在另一方面，滤波器中的电感器相对于电路板水平取向。水平方向减小电感器和电路板走线之间以及电感器和电容器之间的漏电感耦合，从而防止高频率的不必要的传播。组合的两种措施都可以提供30 dB的电压衰减。

2. 发明授权

US07602159B2 Common mode noise reduction using parasitic capacitance cancellation 失效
标题翻译：使用寄生电容消除的共模降噪
公开(公告)号：US07602159B2
公开(公告)日：2009-10-13
申请号：US11678864
申请日：2007-02-26
申请人： Shuo Wang , Fred C. Lee
发明人： Shuo Wang , Fred C. Lee
IPC分类号： G05F1/00 , G05F1/33
CPC分类号： H04B15/02
摘要： A negative capacitance is developed by configuring an inductor as two inversely or opposingly coupled windings having different numbers of turns and connecting a capacitance to a center tap between the two windings. The negative capacitance is developed on the side of the inductor having the winding with the greater number of turns. The negative capacitance so developed may advantageously be used to cancel any capacitance or parasitic capacitance desired for reducing power loss, increasing switching speed or reducing or eliminating common mode noise in a switched circuit such as a switched power converter
摘要翻译：通过将电感器配置为具有不同匝数的两个反相或相对耦合的绕组并将电容连接到两个绕组之间的中心抽头来开发负电容。在具有较大匝数的绕组的电感器的侧面上产生负电容。这样显影的负电容可以有利地用于消除所需的电容或寄生电容，以减少功率损耗，提高开关速度，或者减少或消除诸如开关功率转换器的开关电路中的共模噪声

3. 发明申请

US20080094160A1 GENERALIZED CANCELLATION OF INDUCTOR WINDING CAPACITANCE 失效
标题翻译：电感式绕组电容的一般取消
公开(公告)号：US20080094160A1
公开(公告)日：2008-04-24
申请号：US11850762
申请日：2007-09-06
申请人： Shuo Wang , Fred C. Lee
发明人： Shuo Wang , Fred C. Lee
IPC分类号： H01F29/02
CPC分类号： H01F17/062 , H01F27/34 , H01F27/38 , H03H7/427 , H03H2001/0035 , H03H2001/005 , H03H2001/0057 , H03H2001/0092
摘要： An inductor device or filter such as an electromagnetic interference (EMI) filter which includes an inductor provides cancellation of parasitic capacitance of the inductor and extends high frequency performance of the inductor or filter by using an inductor network (a special case being split windings) and including capacitors to couple signals corresponding to those which are passed by the equivalent parallel capacitance of an inductor of a network of inductors such as in a multi-phase power supply of voltage converter to another inductor terminal, ground or an inductor in the ground return path. Cancellation of parasitic capacitance is provided for differential mode and common mode windings where the windings may be either inductively coupled or not. Forming the windings as a bifilar winding to increase coupling coefficient further improves performance and allows cancellation (as distinct from parasitic capacitance reduction) and avoidance of resonance in circuits in which an inductor is not permitted in the ground return path. Different inductance values and turns ratios of any or all inductors of the network, including multi-phase networks, may be accommodated.
摘要翻译：包括电感器的电感器件或滤波器例如电磁干扰（EMI）滤波器提供消除电感器的寄生电容，并通过使用电感器网络（特殊情况是分流绕组）来延长电感器或滤波器的高频性能，以及包括电容器，用于耦合与电感器网络的电感器的等效并联电容（例如在电压转换器的多相电源）中的等效并联电容相对应的信号到另一个电感器端子，接地或接地返回路径中的电感器。为差分模式和共模绕组提供寄生电容的取消，其中绕组可以感应耦合或不耦合。将绕组形成为双线绕组以增加耦合系数进一步提高性能并允许抵消（与寄生电容降低不同）和避免在接地返回路径中不允许电感器的电路中的谐振。可以适应网络的任何或所有电感器（包括多相网络）的不同的电感值和匝数比。

4. 发明申请

US20110050358A1 Electromagnetic Interference Noise Separator 有权
标题翻译：电磁干扰噪声分离器
公开(公告)号：US20110050358A1
公开(公告)日：2011-03-03
申请号：US12548030
申请日：2009-08-26
申请人： Shuo Wang , Fred C. Lee
发明人： Shuo Wang , Fred C. Lee
IPC分类号： H03H7/38
CPC分类号： H03H7/0115 , H03H1/0007 , H03H2001/0057
摘要： Improved performance of a noise separator circuit capable of separating common mode (CM) and differential mode (DM) components of electromagnetic interference (EMI) noise are provided by arrangement of terminating impedances such that the circuit is fully symmetric with respect of a pair of input ports. The noise separator circuit is further improved by perfecting features for canceling effects of parasitic inductances and capacitances, parasitic capacitance and inductance between circuit connections such as printed circuit board traces, minimizing leakage inductance effects of pairs of coupled inductors and mutual inductance effects between pairs of coupled inductors, providing sufficient magnetizing inductance for low frequency response, and preventing saturation of inductors using switched attenuators, providing a plurality of ground planes, choices of terminating resistors and circuit layout.
摘要翻译：通过排列端接阻抗来提供能够分离电磁干扰（EMI）噪声的共模（CM）和差模（DM）分量的噪声分离器电路的改进的性能，使得电路相对于一对输入完全对称港口。噪声分离器电路通过完善消除寄生电感和电容的影响的特征，电路连接之间的寄生电容和电感（如印刷电路板迹线），使耦合电感对中的漏电感效应最小化，耦合对之间的互感效应电感器，为低频响应提供足够的磁化电感，并防止使用开关衰减器的电感器饱和，提供多个接地平面，终端电阻和电路布局的选择。

5. 发明申请

US20080094153A1 Cancellation of Inductor Winding Capacitance 失效
标题翻译：电感绕组电容的取消
公开(公告)号：US20080094153A1
公开(公告)日：2008-04-24
申请号：US11552292
申请日：2006-10-24
申请人： Shuo Wang , Fred C. Lee
发明人： Shuo Wang , Fred C. Lee
IPC分类号： H03H7/01
CPC分类号： H01F17/062 , H01F27/34 , H01F27/38 , H03H7/427 , H03H2001/0035 , H03H2001/0057 , H03H2001/0092
摘要： An inductor device or filter such as an electromagnetic interference (EMI) filter which includes an inductor provides cancellation of parasitic capacitance of the inductor and extends high frequency performance of the inductor or filter by providing the inductor using split windings and including capacitors to couple signals corresponding to those which are passed by the equivalent parallel capacitance of the inductor to another split winding or an inductor in the ground return path. Cancellation of parasitic capacitance is provided for differential mode and common mode split windings where the split windings may be either inductively coupled or not. Forming the split windings as a bifilar winding to increase coupling coefficient further improves performance and allows cancellation (as distinct from parasitic capacitance reduction) and avoidance of resonance in circuits in which an inductor is not permitted in the ground return path.
摘要翻译：包括电感器的电感器件或滤波器例如电磁干扰（EMI）滤波器提供消除电感器的寄生电容，并通过使用分离绕组提供电感并且包括电容器来耦合相应的信号来延长电感器或滤波器的高频性能通过电感器的等效并联电容到另一个分离绕组或接地返回路径中的电感器的那些。为差分模式和共模分离绕组提供寄生电容的消除，其中分离绕组可以感应耦合或不耦合。形成双绕组作为双线绕组以增加耦合系数进一步提高了性能，并允许抵消（与寄生电容降低不同）和避免在接地返回路径中不允许电感的电路中的谐振。

6. 发明授权

US08698579B2 Multi-phase EMI noise separator 失效
标题翻译：多相EMI噪声分离器
公开(公告)号：US08698579B2
公开(公告)日：2014-04-15
申请号：US13071647
申请日：2011-03-25
申请人： Shuo Wang , Fred C. Lee
发明人： Shuo Wang , Fred C. Lee
IPC分类号： H03H7/00 , H04B3/28
CPC分类号： H03H7/427 , G01R31/001 , H03H7/09 , H03H7/1725 , H03H2001/005
摘要： Common mode (CM) and differential mode (DM) components of multi-phase conducted electromagnetic interference (EMI) noise emanating from electronic circuits such as power converters/inverters are separated by respective coupled inductors connected to each phase of three or more phases and which are coupled to each other differently for CM and DM noise of the respective phases. The inductors of the DM separation unit are coupled such that a substantially ideal zero impedance is presented to DM noise while a high impedance is presented to CM noise. Conversely, the inductors of the CM separation unit are coupled such that a substantially ideal zero impedance is presented to CM noise while a high impedance is presented to DM noise.
摘要翻译：从电力转换器/逆变器等电子电路发出的多相传导电磁干扰（EMI）噪声的共模（CM）和差分模式（DM）分量由连接到三相或更多相的每相的相应的耦合电感器分开，彼此不同地相互耦合，用于各个相的CM和DM噪声。 DM分离单元的电感器被耦合，使得将基本理想的零阻抗呈现给DM噪声，同时将高阻抗呈现给CM噪声。相反，CM分离单元的电感器被耦合，使得将基本理想的零阻抗呈现给CM噪声，同时将高阻抗呈现给DM噪声。

7. 发明授权

US08125291B2 Electromagnetic interference noise separator 有权
标题翻译：电磁干扰噪声分离器
公开(公告)号：US08125291B2
公开(公告)日：2012-02-28
申请号：US12548030
申请日：2009-08-26
申请人： Shuo Wang , Fred C. Lee
发明人： Shuo Wang , Fred C. Lee
IPC分类号： H03H7/38
CPC分类号： H03H7/0115 , H03H1/0007 , H03H2001/0057
摘要： Improved performance of a noise separator circuit capable of separating common mode (CM) and differential mode (DM) components of electromagnetic interference (EMI) noise are provided by arrangement of terminating impedances such that the circuit is fully symmetric with respect of a pair of input ports. The noise separator circuit is further improved by perfecting features for canceling effects of parasitic inductances and capacitances, parasitic capacitance and inductance between circuit connections such as printed circuit board traces, minimizing leakage inductance effects of pairs of coupled inductors and mutual inductance effects between pairs of coupled inductors, providing sufficient magnetizing inductance for low frequency response, and preventing saturation of inductors using switched attenuators, providing a plurality of ground planes, choices of terminating resistors and circuit layout.
摘要翻译：通过排列端接阻抗来提供能够分离电磁干扰（EMI）噪声的共模（CM）和差模（DM）分量的噪声分离器电路的改进的性能，使得电路相对于一对输入完全对称港口。噪声分离器电路通过完善消除寄生电感和电容的影响的特征，电路连接之间的寄生电容和电感（如印刷电路板迹线），使耦合电感对中的漏电感效应最小化，耦合对之间的互感效应电感器，为低频响应提供足够的磁化电感，并防止使用开关衰减器的电感器饱和，提供多个接地平面，终端电阻和电路布局的选择。

8. 发明申请

US20110241799A1 MULTI-PHASE EMI NOISE SEPARATOR 失效
标题翻译：多相EMI噪声分离器
公开(公告)号：US20110241799A1
公开(公告)日：2011-10-06
申请号：US13071647
申请日：2011-03-25
申请人： Shuo Wang , Fred C. Lee
发明人： Shuo Wang , Fred C. Lee
IPC分类号： H03H7/00
CPC分类号： H03H7/427 , G01R31/001 , H03H7/09 , H03H7/1725 , H03H2001/005
摘要： Common mode (CM) and differential mode (DM) components of multi-phase conducted electromagnetic interference (EMI) noise emanating from electronic circuits such as power converters/inverters are separated by respective coupled inductors connected to each phase of three or more phases and which are coupled to each other differently for CM and DM noise of the respective phases. The inductors of the DM separation unit are coupled such that a substantially ideal zero impedance is presented to DM noise while a high impedance is presented to CM noise. Conversely, the inductors of the CM separation unit are coupled such that a substantially ideal zero impedance is presented to CM noise while a high impedance is presented to DM noise.
摘要翻译：从电力转换器/逆变器等电子电路发出的多相传导电磁干扰（EMI）噪声的共模（CM）和差分模式（DM）分量由连接到三相或更多相的每相的相应的耦合电感器分开，彼此不同地相互耦合，用于各个相的CM和DM噪声。 DM分离单元的电感器被耦合，使得将基本理想的零阻抗呈现给DM噪声，同时将高阻抗呈现给CM噪声。相反，CM分离单元的电感器被耦合，使得将基本理想的零阻抗呈现给CM噪声，同时将高阻抗呈现给DM噪声。

9. 发明授权

US07554423B2 Cancellation of inductor winding capacitance 失效
标题翻译：消除电感绕组电容
公开(公告)号：US07554423B2
公开(公告)日：2009-06-30
申请号：US11552292
申请日：2006-10-24
申请人： Shuo Wang , Fred C. Lee
发明人： Shuo Wang , Fred C. Lee
IPC分类号： H03H7/00 , H01F27/28
CPC分类号： H01F17/062 , H01F27/34 , H01F27/38 , H03H7/427 , H03H2001/0035 , H03H2001/0057 , H03H2001/0092
摘要： An inductor device or filter such as an electromagnetic interference (EMI) filter which includes an inductor provides cancellation of parasitic capacitance of the inductor and extends high frequency performance of the inductor or filter by providing the inductor using split windings and including capacitors to couple signals corresponding to those which are passed by the equivalent parallel capacitance of the inductor to another split winding or an inductor in the ground return path. Cancellation of parasitic capacitance is provided for differential mode and common mode split windings where the split windings may be either inductively coupled or not. Forming the split windings as a bifilar winding to increase coupling coefficient further improves performance and allows cancellation (as distinct from parasitic capacitance reduction) and avoidance of resonance in circuits in which an inductor is not permitted in the ground return path.
摘要翻译：包括电感器的电感器件或滤波器例如电磁干扰（EMI）滤波器提供消除电感器的寄生电容，并通过使用分离绕组提供电感并且包括电容器来耦合相应的信号来延长电感器或滤波器的高频性能通过电感器的等效并联电容到另一个分离绕组或接地返回路径中的电感器的那些。为差分模式和共模分离绕组提供寄生电容的消除，其中分离绕组可以感应耦合或不耦合。形成双绕组作为双线绕组以增加耦合系数进一步提高了性能，并允许抵消（与寄生电容降低不同）和避免在接地返回路径中不允许电感的电路中的谐振。

10. 发明授权

US07548137B2 Generalized cancellation of inductor winding capacitance 失效
标题翻译：电感绕组电容的广义消除
公开(公告)号：US07548137B2
公开(公告)日：2009-06-16
申请号：US11850762
申请日：2007-09-06
申请人： Shuo Wang , Fred C. Lee
发明人： Shuo Wang , Fred C. Lee
IPC分类号： H03H7/00 , H01F30/00 , H01F30/16
CPC分类号： H01F17/062 , H01F27/34 , H01F27/38 , H03H7/427 , H03H2001/0035 , H03H2001/005 , H03H2001/0057 , H03H2001/0092
摘要： An inductor device or filter such as an electromagnetic interference (EMI) filter which includes an inductor provides cancellation of parasitic capacitance of the inductor and extends high frequency performance of the inductor or filter by using an inductor network (a special case being split windings) and including capacitors to couple signals corresponding to those which are passed by the equivalent parallel capacitance of an inductor of a network of inductors such as in a multi-phase power supply of voltage converter to another inductor terminal, ground or an inductor in the ground return path. Cancellation of parasitic capacitance is provided for differential mode and common mode windings where the windings may be either inductively coupled or not. Forming the windings as a bifilar winding to increase coupling coefficient further improves performance and allows cancellation (as distinct from parasitic capacitance reduction) and avoidance of resonance in circuits in which an inductor is not permitted in the ground return path. Different inductance values and turns ratios of any or all inductors of the network, including multi-phase networks, may be accommodated.
摘要翻译：包括电感器的电感器件或滤波器例如电磁干扰（EMI）滤波器提供消除电感器的寄生电容，并通过使用电感器网络（特殊情况是分流绕组）来延长电感器或滤波器的高频性能，以及包括电容器，用于耦合与电感器网络的电感器的等效并联电容（例如在电压转换器的多相电源）中的等效并联电容相对应的信号到另一个电感器端子，接地或地线返回路径。为差分模式和共模绕组提供寄生电容的取消，其中绕组可以感应耦合或不耦合。将绕组形成为双线绕组以增加耦合系数进一步提高性能并允许抵消（与寄生电容降低不同）和避免在接地返回路径中不允许电感器的电路中的谐振。可以适应网络的任何或所有电感器（包括多相网络）的不同的电感值和匝数比。

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