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1. 发明授权

US06208098B1 Variable frequency drive noise attenuation circuit 有权
标题翻译：变频驱动噪声衰减电路
公开(公告)号：US06208098B1
公开(公告)日：2001-03-27
申请号：US09460124
申请日：1999-12-13
申请人： Tsuneo Kume , Mahesh M. Swamy
发明人： Tsuneo Kume , Mahesh M. Swamy
IPC分类号： H02K2300
CPC分类号： H02M1/40 , H02M1/126 , H02M2001/123
摘要： A noise attenuation circuit is disclosed for use in a motor drive system. The motor drive system includes a pulse width modulated inverter providing three phase power output on three phase conductors for driving a motor. The noise attenuation circuit includes a common mode transformer including a common mode choke having a core, with first, second and third choke windings on the core, each connected in series with one of the three phase conductors, and a fourth winding on the core. A three phase iron core transformer creates a neutral point representing common mode voltage. The iron core transformer has three primary windings connected in a wye configuration. A capacitor circuit is connected between the iron core transformer and the three phase conductors to prevent saturation of the iron core transformer during pulsed DC operating conditions. The fourth winding is connected between the neutral point and the DC bus and develops a common mode voltage that is equal and opposite to that existing in the system. This common mode voltage, when impressed across the three choke windings, effectively cancels the systems' common mode voltage thereby reducing the common mode current significantly.
摘要翻译：公开了一种用于电动机驱动系统的噪声衰减电路。电动机驱动系统包括一个脉宽调制逆变器，在三相导线上提供用于驱动电动机的三相电力输出。噪声衰减电路包括共模变压器，其包括具有芯的共模扼流圈，其中在芯上的第一，第二和第三扼流圈绕组与三个相导体中的一个串联，并且在芯上连接第四绕组。三相铁芯变压器产生一个表示共模电压的中性点。铁芯变压器具有三个初级绕组，以三角形配置连接。在铁芯变压器和三相导体之间连接一个电容电路，以防止铁心变压器在脉冲直流工况下饱和。第四绕组连接在中性点和直流总线之间，并产生与系统中存在的相同和相反的共模电压。这种共模电压在三个扼流绕组上施加电压时，有效地抵消了系统的共模电压，从而显着降低了共模电流。

2. 发明授权

US6028405A Variable frequency drive noise attenuation circuit 失效
标题翻译：变频驱动噪声衰减电路
公开(公告)号：US6028405A
公开(公告)日：2000-02-22
申请号：US45333
申请日：1998-03-02
申请人： Tsuneo Kume , Mahesh M. Swamy
发明人： Tsuneo Kume , Mahesh M. Swamy
IPC分类号： H02M1/12 , H02K23/00
CPC分类号： H02M1/126 , H02M2001/123
摘要： A noise attenuation circuit is used in a motor drive system. The motor drive system includes a variable frequency drive having a pulse width modulated inverter converting DC power from a DC bus to three-phase power output on three-phase conductors for driving a motor. The noise attenuation circuit comprises a common-mode transformer including a common mode choke having a core, with first, second and third choke windings on the core, each connected in series with one of the three phase conductors, and a fourth winding on the core. A three-phase iron core transformer creates a neutral point representing common mode voltage. The iron core transformer has three primary windings connected in a "wye" configuration to the three phase conductors. The fourth winding has a start connected to the neutral point and an end operatively connected to the DC bus to force a current, dependent on the voltage of the neutral point relative to the DC bus, in the fourth winding of the common mode transformer in an opposite direction to cancel main common mode current.
摘要翻译：在电动机驱动系统中使用噪声衰减电路。电动机驱动系统包括具有脉冲宽度调制逆变器的变频驱动器，其将来自DC总线的DC电力转换为用于驱动电动机的三相导体上的三相电力输出。噪声衰减电路包括共模变压器，其包括具有芯的共模扼流器，其中芯上的第一，第二和第三扼流圈各自与三相导体中的一个串联，并且在芯上连接第四绕组。三相铁芯变压器产生一个表示共模电压的中性点。铁芯变压器有三个初级绕组，以“Y”形结构连接到三相导线。第四绕组具有连接到中性点的开始端和可操作地连接到DC总线的端部，以在共模变压器的第四绕组中依赖于相对于DC总线的中性点的电压来强制电流相反方向取消主共模电流。

3. 发明申请

US20130176753A1 Three Phase Active Rectifier System 有权
标题翻译：三相有源整流器系统
公开(公告)号：US20130176753A1
公开(公告)日：2013-07-11
申请号：US13347097
申请日：2012-01-10
申请人： Mahesh M. Swamy
发明人： Mahesh M. Swamy
IPC分类号： H02M5/458
CPC分类号： H02M1/4216 , H02M2001/008 , Y02B70/126
摘要： A voltage source inverter comprises a rectifier converting AC power to DC power at an output. An inverter receives DC power and converts the DC power to AC power. A link circuit is connected between the rectifier circuit and the inverter circuit and comprises a DC bus. A DC bus capacitor across the DC bus smoothes voltage ripple. An active filter circuit comprises a pair of filter capacitors in series across the first and second rails to create a midpoint. Bidirectional switches are connected between the rectifier input and the midpoint. A current sensor is connected between the bidirectional switches and the midpoint. An active switch controller controls a conduction angle of the bidirectional switches to maintain DC bus voltage at a desired reference level under a wide load range.
摘要翻译：电压源逆变器包括在输出端将AC电力转换为DC电力的整流器。逆变器接收直流电，并将直流电转换为交流电。一个连接电路连接在整流电路和逆变器电路之间，并包括一个直流总线。直流总线上的直流总线电容可以平滑电压纹波。有源滤波器电路包括跨越第一和第二导轨串联的一对滤波电容器，以产生中点。双向开关连接在整流器输入和中点之间。电流传感器连接在双向开关和中点之间。有源开关控制器控制双向开关的导通角，以在宽负载范围内将DC总线电压维持在所需的参考电平。

4. 发明授权

US08274803B2 Low stress soft charge circuit for diode front end variable frequency drive 失效
标题翻译：用于二极管前端变频驱动的低应力软充电电路
公开(公告)号：US08274803B2
公开(公告)日：2012-09-25
申请号：US12655327
申请日：2009-12-29
申请人： Mahesh M. Swamy , Tsuneo Joe Kume
发明人： Mahesh M. Swamy , Tsuneo Joe Kume
IPC分类号： H02J1/02
CPC分类号： H02J7/045 , H02J7/345 , H02M1/36 , H02M5/458
摘要： A variable frequency drive comprises a diode rectifier receiving multiphase AC power from a source and converting the AC power to DC power. An inverter receives DC power and converts the DC power to AC power to drive a load. A link circuit is connected between the diode rectifier and the inverter and comprises a DC bus to provide a relatively fixed DC voltage for the inverter. A bus capacitor is across the bus. A soft charge circuit limits inrush current to the bus capacitor. The soft charge circuit comprises an inductor connected between the source and the link circuit and a switch circuit in the link circuit for selectively providing a semiconverter configuration or a full bridge converter configuration to provide two stage charging of the bus capacitor.
摘要翻译：变频驱动器包括从源极接收多相交流电的二极管整流器，并将交流电转换为直流电力。逆变器接收直流电源，并将直流电源转换为交流电源以驱动负载。连接电路连接在二极管整流器和逆变器之间，并包括一个DC总线，为逆变器提供相对固定的直流电压。公共汽车上有一个总线电容。软充电电路限制了总线电容的浪涌电流。软充电电路包括连接在源极和链路电路之间的电感器和连接电路中的开关电路，用于选择性地提供半转换器配置或全桥转换器配置以提供总线电容器的两级充电。

5. 发明申请

US20120176176A1 Resonant Gate Drive Circuit For A Power Switching Device In A High Frequency Power Converter 失效
标题翻译：用于高频功率转换器中的电源开关器件的谐振栅极驱动电路
公开(公告)号：US20120176176A1
公开(公告)日：2012-07-12
申请号：US13211481
申请日：2011-08-17
申请人： Mahesh M. Swamy , Tsuneo Joe Kume
发明人： Mahesh M. Swamy , Tsuneo Joe Kume
IPC分类号： H03K17/284 , H03K17/56
CPC分类号： H03K17/785 , H03K17/04123 , H03K2217/0054 , H03K2217/009
摘要： A resonant gate drive circuit for a power switching device, having a gate-emitter capacitance, is adapted for use with a high frequency power converter. The resonant gate drive circuit comprises a signal input source, a power supply and a resonant inductor. An electrical isolator is connected between the signal input source and a switching node. The electrical isolator is connected to the power supply. A first bidirectional switch is connected between the resonant inductor and the power switching device and includes a first switch control circuit connected to the node to be controlled by a signal from the signal input source. A second bidirectional switch is connected between the power supply and the power switching device and includes a second switch control circuit connected to the node to be controlled by the signal from the input source. The first and second control circuits are adapted to control the first bidirectional switch to provide a first charge path during a resonant period from the resonant inductor to the gate-emitter capacitance defining a quick resonant charge path and to control the second bidirectional switch to provide a second charge path defining a voltage equalization charge path subsequent to the resonant period.
摘要翻译：用于具有栅极 - 发射极电容的功率开关器件的谐振栅极驱动电路适于与高频功率转换器一起使用。谐振栅极驱动电路包括信号输入源，电源和谐振电感器。电隔离器连接在信号输入源和交换节点之间。电气隔离器连接到电源。第一双向开关连接在谐振电感器和功率开关装置之间，并且包括连接到要由信号输入源的信号控制的节点的第一开关控制电路。第二双向开关连接在电源和电源开关装置之间，并且包括连接到要由来自输入源的信号控制的节点的第二开关控制电路。第一和第二控制电路适于控制第一双向开关以在从谐振电感器到限定快速谐振充电路径的栅 - 发射极电容的谐振周期期间提供第一充电路径，并且控制第二双向开关以提供第二电荷路径限定谐振周期之后的电压均衡充电路径。

6. 发明授权

US08179701B2 Variable frequency drive soft charge circuit 失效
标题翻译：变频驱动软充电电路
公开(公告)号：US08179701B2
公开(公告)日：2012-05-15
申请号：US12459718
申请日：2009-07-07
申请人： Mahesh M. Swamy , Tsuneo Joe Kume
发明人： Mahesh M. Swamy , Tsuneo Joe Kume
IPC分类号： H02M5/458
CPC分类号： H02M5/458 , H02M1/36
摘要： A variable frequency drive comprises a diode rectifier receiving multiphase AC power and converting the AC power to DC power. An inverter receives DC power and converts the DC power to AC power to drive a load. A link circuit is connected between the diode rectifier and the inverter and comprises a DC bus to provide a relatively fixed DC voltage for the inverter. A link capacitor is across the bus. A soft charge circuit limits in rush current to the link capacitor. The soft charge circuit comprises an inductor in the bus and a resistor assist circuit across the inductor along with an anti-parallel clamping thyristor reverse connected also across the inductor.
摘要翻译：变频驱动器包括接收多相交流电的二极管整流器，并将交流电转换成直流电源。逆变器接收直流电源，并将直流电源转换为交流电源以驱动负载。连接电路连接在二极管整流器和逆变器之间，并包括一个DC总线，为逆变器提供相对固定的直流电压。总线上有一个链路电容。软充电电路将冲击电流限制到链路电容器。软充电电路包括总线中的电感器和跨过电感器的电阻器辅助电路以及反并联钳位晶闸管，其也跨过电感器反向连接。

7. 发明申请

US20110038185A1 Low stress soft charge circuit for diode front end variable frequency drive 失效
标题翻译：用于二极管前端变频驱动的低应力软充电电路
公开(公告)号：US20110038185A1
公开(公告)日：2011-02-17
申请号：US12655327
申请日：2009-12-29
申请人： Mahesh M. Swamy , Tsuneo Joe Kume
发明人： Mahesh M. Swamy , Tsuneo Joe Kume
IPC分类号： H02J4/00 , H02M7/44
CPC分类号： H02J7/045 , H02J7/345 , H02M1/36 , H02M5/458
摘要： A variable frequency drive comprises a diode rectifier receiving multiphase AC power from a source and converting the AC power to DC power. An inverter receives DC power and converts the DC power to AC power to drive a load. A link circuit is connected between the diode rectifier and the inverter and comprises a DC bus to provide a relatively fixed DC voltage for the inverter. A bus capacitor is across the bus. A soft charge circuit limits inrush current to the bus capacitor. The soft charge circuit comprises an inductor connected between the source and the link circuit and a switch circuit in the link circuit for selectively providing a semiconverter configuration or a full bridge converter configuration to provide two stage charging of the bus capacitor.
摘要翻译：变频驱动器包括从源极接收多相交流电的二极管整流器，并将交流电转换为直流电力。逆变器接收直流电源，并将直流电源转换为交流电源以驱动负载。连接电路连接在二极管整流器和逆变器之间，并包括一个DC总线，为逆变器提供相对固定的直流电压。公共汽车上有一个总线电容。软充电电路限制了总线电容的浪涌电流。软充电电路包括连接在源极和链路电路之间的电感器和连接电路中的开关电路，用于选择性地提供半转换器配置或全桥转换器配置以提供总线电容器的两级充电。

8. 发明授权

US07227330B2 Overvoltage suppression technique for variable frequency drives operating reciprocating loads 有权
公开(公告)号：US07227330B2
公开(公告)日：2007-06-05
申请号：US11181544
申请日：2005-07-14
申请人： Mahesh M. Swamy , Brian Geoffrey , Yoshiaki Yukihira , Mike Rucinski
发明人： Mahesh M. Swamy , Brian Geoffrey , Yoshiaki Yukihira , Mike Rucinski
IPC分类号： H02P23/00 , B66B1/28
CPC分类号： H02P3/18
摘要： A motor control for a reciprocating load includes overvoltage suppression. The motor control comprises a variable frequency drive (VFD) operatively connected to a power source for operating a motor to drive the reciprocating load. A sensor determines motor torque. A control unit is connected to the VFD and to the sensor and is adapted to control the VFD in a normal mode to operate the motor at a select reference frequency. The control unit predicts occurrence of a negative motor torque condition based on sensed motor torque and in response to a negative motor torque condition controls the VFD in a negative motor torque mode to operate the motor at a higher frequency than the select reference frequency to prevent the motor from entering a negative slip condition.

9. 发明申请

US20130208515A1 AC SIDE SOFT CHARGE CIRCUIT FOR VARIABLE FREQUENCY DRIVES 失效
标题翻译：用于可变频率驱动的交流侧软充电电路
公开(公告)号：US20130208515A1
公开(公告)日：2013-08-15
申请号：US13371865
申请日：2012-02-13
申请人： Mahesh M. Swamy
发明人： Mahesh M. Swamy
IPC分类号： H02M5/458
CPC分类号： H02M1/36 , H02M5/458
摘要： A voltage source inverter comprises a rectifier having an input for connection to a multi-phase AC power source and converting the AC power to DC power at an output. An inverter receives DC power and converts the DC power to AC power. A DC bus is connected between the rectifier circuit and the inverter circuit to provide a relatively fixed DC voltage for the inverter. A bus capacitor is across the DC bus. A soft charge circuit limits inrush current to the bus capacitor. The soft charge circuit comprises an input inductor for each phase connected between the rectifier input and the AC power source and a clamping circuit across each input inductor to limit DC bus voltage.
摘要翻译：电压源逆变器包括整流器，其具有用于连接到多相AC电源的输入端，并将AC电力转换为输出端的DC电力。逆变器接收直流电，并将直流电转换为交流电。直流母线连接在整流电路和逆变电路之间，为逆变器提供相对固定的直流电压。总线电容在整个直流母线上。软充电电路限制了总线电容的浪涌电流。软充电电路包括用于连接在整流器输入和AC电源之间的每相的输入电感器和跨每个输入电感器的钳位电路以限制DC总线电压。

10. 发明申请

US20110007530A1 Variable frequency drive soft charge circuit 失效
标题翻译：变频驱动软充电电路
公开(公告)号：US20110007530A1
公开(公告)日：2011-01-13
申请号：US12459718
申请日：2009-07-07
申请人： Mahesh M. Swamy , Tsuneo Joe Kume
发明人： Mahesh M. Swamy , Tsuneo Joe Kume
IPC分类号： H02M5/45
CPC分类号： H02M5/458 , H02M1/36
摘要： A variable frequency drive comprises a diode rectifier receiving multiphase AC power and converting the AC power to DC power. An inverter receives DC power and converts the DC power to AC power to drive a load. A link circuit is connected between the diode rectifier and the inverter and comprises a DC bus to provide a relatively fixed DC voltage for the inverter. A link capacitor is across the bus. A soft charge circuit limits in rush current to the link capacitor. The soft charge circuit comprises an inductor in the bus and a resistor assist circuit across the inductor along with an anti-parallel clamping thyristor reverse connected also across the inductor.
摘要翻译：变频驱动器包括接收多相交流电的二极管整流器，并将交流电转换成直流电源。逆变器接收直流电源，并将直流电源转换为交流电源以驱动负载。连接电路连接在二极管整流器和逆变器之间，并包括一个DC总线，为逆变器提供相对固定的直流电压。总线上有一个链路电容。软充电电路将冲击电流限制到链路电容器。软充电电路包括总线中的电感器和跨过电感器的电阻器辅助电路以及反并联钳位晶闸管，其也跨过电感器反向连接。

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