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公开(公告)号：US20080284385A1
公开(公告)日：2008-11-20
申请号：US12114008
申请日：2008-05-02
申请人： Chandra S. Namuduri , Lei Hao
发明人： Chandra S. Namuduri , Lei Hao
摘要： A generator system that includes a three-phase AC machine and an active rectifier bridge employing low on-resistance MOSFET switches for converting the AC current from the machine to a DC current. The system also includes a switch control circuit to switch the MOSFET switches in synchronization with the three-phase current flow. The system determines the phase-to-ground voltages of the machine as inputs to the switch control circuit. The control circuit calculates the phase-to-phase voltages from the phase-to-ground voltages. The control circuit then determines if each of the phase-to-phase voltages is above or below first and second predetermined threshold voltages, where if the phase-to-phase voltage is above the first threshold voltage, the control circuit closes the switch, and if the phase-to-phase voltage is below the second threshold voltage, the control circuit opens the switch.
摘要翻译： 一种发电机系统，包括三相交流电机和采用低导通电阻MOSFET开关的有源整流桥，用于将来自机器的交流电流转换为直流电流。 该系统还包括开关控制电路，以与三相电流流同步地切换MOSFET开关。 该系统确定机器的相对地电压作为开关控制电路的输入。 控制电路根据相对地电压来计算相间电压。 然后，控制电路确定每个相间电压是否高于或低于第一和第二预定阈值电压，其中如果相间电压高于第一阈值电压，则控制电路关闭开关，并且 如果相间电压低于第二阈值电压，则控制电路打开开关。
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22.发明授权公开(公告)号：US08866428B2
公开(公告)日：2014-10-21
申请号：US13151568
申请日：2011-06-02
申请人： Lei Hao , Yilu Zhang , Siwei Cheng
发明人： Lei Hao , Yilu Zhang , Siwei Cheng
CPC分类号： H02P29/0055 , G01K7/22 , G01K2205/00 , G01K2217/00 , G01R31/343 , H02P29/028 , H02P29/032 , H02P29/64
摘要： A method for determining a temperature of an electric motor including stator windings includes injecting an AC current into a D-axis current of a stator winding at a frequency that is synchronized with a control frequency of the electric motor, determining a DC-phase current, determining a resistance of the stator winding corresponding to the DC-phase current and an applied voltage, and determining a temperature of the electric motor as a function of the resistance of the stator winding.
摘要翻译： 一种用于确定包括定子绕组的电动机的温度的方法包括以与电动机的控制频率同步的频率将AC电流注入到定子绕组的D轴电流中，确定DC相电流， 确定对应于DC相电流的定子绕组的电阻和施加的电压，以及根据定子绕组的电阻确定电动机的温度。
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公开(公告)号：US08736216B2
公开(公告)日：2014-05-27
申请号：US13151532
申请日：2011-06-02
申请人： Sanjeev M. Naik , Lei Hao
发明人： Sanjeev M. Naik , Lei Hao
IPC分类号： H02P1/42
CPC分类号： H02P25/18 , H02K3/28 , H02K11/04 , H02K11/049 , H02K2213/09
摘要： A stator phase circuit for an electric machine includes a phase winding circuit including a plurality of series coupled sub-winding circuits, each sub-winding circuit includes a respective sub-winding coupled in parallel across a respective first controllable switch.
摘要翻译： 一种用于电机的定子相电路包括一个包括多个串联耦合子绕组电路的相绕组电路，每个子绕组电路包括并联耦合在相应的第一可控开关上的相应副绕组。
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公开(公告)号：US08497664B2
公开(公告)日：2013-07-30
申请号：US12622198
申请日：2009-11-19
申请人： Lei Hao , Chandra S. Namuduri
发明人： Lei Hao , Chandra S. Namuduri
CPC分类号： H02M7/219
摘要： A generator system that includes a six-phase AC machine and an active rectifier bridge employing low on-resistance switches, such as MOSFET switches, for converting the AC current from the machine to a DC current. The system also includes a switch control circuit to switch the MOSFET switches in synchronization with the six-phase current flow. The system determines the phase-to-ground voltages of the machine for inputs to the switch control circuit. The control circuit calculates the phase-to-phase voltages from the phase-to-ground voltages. The control circuit uses a specific control scheme to determine if each of the phase-to-phase voltages is above or below first and second predetermined threshold voltages, where if the phase-to-phase voltage is above the first threshold voltage, the control circuit closes the switch, and if the phase-to-phase voltage is below the second threshold voltage, the control circuit opens the switch.
摘要翻译： 一种发电机系统，其包括六相交流电机和采用低导通电阻开关（例如MOSFET开关）的有源整流桥，用于将来自机器的交流电流转换为直流电流。 该系统还包括开关控制电路，以与六相电流流同步地切换MOSFET开关。 该系统确定机器的开关控制电路输入的相对地电压。 控制电路根据相对地电压来计算相间电压。 控制电路使用特定的控制方案来确定每个相间电压是否高于或低于第一和第二预定阈值电压，其中如果相间电压高于第一阈值电压，则控制电路 关闭开关，并且如果相间电压低于第二阈值电压，则控制电路打开开关。
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公开(公告)号：US20120306424A1
公开(公告)日：2012-12-06
申请号：US13151532
申请日：2011-06-02
申请人： Sanjeev M. Naik , Lei Hao
发明人： Sanjeev M. Naik , Lei Hao
IPC分类号： H02P25/18
CPC分类号： H02P25/18 , H02K3/28 , H02K11/04 , H02K11/049 , H02K2213/09
摘要： A stator phase circuit for an electric machine includes a phase winding circuit including a plurality of series coupled sub-winding circuits, each sub-winding circuit includes a respective sub-winding coupled in parallel across a respective first controllable switch.
摘要翻译： 一种用于电机的定子相电路包括一个包括多个串联耦合子绕组电路的相绕组电路，每个子绕组电路包括并联耦合在相应的第一可控开关上的相应副绕组。
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公开(公告)号：US20120194040A1
公开(公告)日：2012-08-02
申请号：US13017331
申请日：2011-01-31
申请人： Lei Hao , Chandra S. Namuduri
发明人： Lei Hao , Chandra S. Namuduri
IPC分类号： H02K11/04
摘要： A permanent magnet electric machine drive system that includes a plurality of magnets for generating a first magnetic field and a stator is disposed radially outward from the plurality of magnets for generating a magnetic field. The stator includes a plurality of stator poles separated by slots with each respective stator pole having a concentrated winding with a respective number of turns formed around each respective stator pole. Each respective concentrated winding within the stator comprising non-overlapping phases. The concentrated windings form a dual three-phase winding configuration that includes a first set of three-balanced phase windings and a second set of three-balanced phase windings. The first set of three-balanced phase windings is phase shifted in the range of 15 to 45 electrical degrees from the second set of three-balanced phase windings for reducing the torque ripple.
摘要翻译： 包括用于产生第一磁场的多个磁体和定子的永磁电机驱动系统从多个磁体径向向外设置，用于产生磁场。 定子包括由槽分开的多个定子极，每个相应的定子极具有集中的绕组，其中每个相应的定子极周围形成相应的匝数。 定子内的每个相应的集中绕组包括非重叠相。 集中绕组形成双重三相绕组配置，其包括第一组三平衡相绕组和第二组三平衡相绕组。 第三组三相绕组与第三组三相绕组的相位偏移在15至45度的范围内，以减小转矩波动。
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公开(公告)号：US20120181854A1
公开(公告)日：2012-07-19
申请号：US13006542
申请日：2011-01-14
IPC分类号： B60L1/00
CPC分类号： B60L11/1861 , B60L11/1868 , B60L2210/10 , B60L2240/12 , B60L2240/545 , Y02T10/7016 , Y02T10/7044 , Y02T10/7066 , Y02T10/7216
摘要： An on-vehicle DC/DC converter transforms high-voltage electric power originating from an on-vehicle high-voltage source to low-voltage electric power at a regulated voltage level. The low-voltage electric power is distributed by a low-voltage bus. A method for operating the DC/DC converter includes monitoring a state of charge and a temperature of a low-voltage battery connected to the low-voltage bus, setting a DC/DC converter command to a nominal voltage level as a function of the state of charge and temperature of the low-voltage battery, monitoring a total low-voltage electric load, and adjusting the DC/DC converter command to a minimum low-voltage reference voltage when the vehicle is operating below a predetermined speed and the total low-voltage electric load is greater than a predetermined load.
摘要翻译： 车载DC / DC转换器将来自车载高压源的高压电力以稳定的电压水平转换为低压电力。 低压电力由低压母线分配。 用于操作DC / DC转换器的方法包括监视与低压总线连接的低电压电池的充电状态和温度，将DC / DC转换器命令设置为作为状态的函数的标称电压电平 的低压电池的充电和温度，监测总的低压电负载，并且当车辆运行低于预定速度时，将DC / DC转换器命令调整到最小的低电压参考电压， 电压电负载大于预定负载。
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公开(公告)号：US20110116291A1
公开(公告)日：2011-05-19
申请号：US12622198
申请日：2009-11-19
申请人： Lei Hao , Chandra S. Namuduri
发明人： Lei Hao , Chandra S. Namuduri
IPC分类号： H02M7/155
CPC分类号： H02M7/219
摘要： A generator system that includes a six-phase AC machine and an active rectifier bridge employing low on-resistance switches, such as MOSFET switches, for converting the AC current from the machine to a DC current. The system also includes a switch control circuit to switch the MOSFET switches in synchronization with the six-phase current flow. The system determines the phase-to-ground voltages of the machine for inputs to the switch control circuit. The control circuit calculates the phase-to-phase voltages from the phase-to-ground voltages. The control circuit uses a specific control scheme to determine if each of the phase-to-phase voltages is above or below first and second predetermined threshold voltages, where if the phase-to-phase voltage is above the first threshold voltage, the control circuit closes the switch, and if the phase-to-phase voltage is below the second threshold voltage, the control circuit opens the switch.
摘要翻译： 一种发电机系统，其包括六相交流电机和采用低导通电阻开关（例如MOSFET开关）的有源整流桥，用于将来自机器的交流电流转换为直流电流。 该系统还包括开关控制电路，以与六相电流流同步地切换MOSFET开关。 该系统确定机器的开关控制电路输入的相对地电压。 控制电路根据相对地电压来计算相间电压。 控制电路使用特定的控制方案来确定每个相间电压是否高于或低于第一和第二预定阈值电压，其中如果相间电压高于第一阈值电压，则控制电路 关闭开关，并且如果相间电压低于第二阈值电压，则控制电路打开开关。
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公开(公告)号：US20100259208A1
公开(公告)日：2010-10-14
申请号：US12421001
申请日：2009-04-09
申请人： Lei Hao , Chandra S. Namuduri
发明人： Lei Hao , Chandra S. Namuduri
CPC分类号： H02K21/028
摘要： A method for controlling an electric machine includes measuring a motor control parameter or parameters and selectively positioning an adjustable member within the electric machine in response the motor control parameters. Selective positioning of the adjustable member varies the geometry of a flux path within the electric machine, thereby inducing a predetermined voltage output in the electric machine. An electric machine includes a rotor, a shaft operatively connected to the rotor to rotate in conjunction therewith, and a stator. An adjustable member is positioned between the rotor and the stator, and has a variable offset position that can be selected by an electronic control unit (ECU) and applied by an actuator to thereby vary the geometry of a flux path within the electric machine. The adjustable member can include a non-magnetic annular hub and magnetic radial arms and axial extensions.
摘要翻译： 一种用于控制电机的方法包括测量电机控制参数或参数，并响应于电动机控制参数选择性地将可调节构件定位在电机内。 可调节构件的选择性定位改变电机内的通量路径的几何形状，从而在电机中引起预定的电压输出。 电机包括转子，可操作地连接到转子以与其一起旋转的轴和定子。 可调节构件定位在转子和定子之间，并且具有可由电子控制单元（ECU）选择并由致动器施加的可变偏移位置，从而改变电机内的磁通路径的几何形状。 可调节构件可以包括非磁性环形轮毂和磁性径向臂和轴向延伸部。
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公开(公告)号：US20080061724A1
公开(公告)日：2008-03-13
申请号：US11841226
申请日：2007-08-20
申请人： Lei Hao , Zilai Zhao
发明人： Lei Hao , Zilai Zhao
CPC分类号： H02P21/18
摘要： The invention indicates a correct one of multiple rotor positions. For example, the invention can determine, in a PM machine, which of two possible positions a rotor is in when the position is known only within ±π radians. If the actual rotor position is known to be one of ω and ω+π, for example as indicated by a resolver, the proposed invention can be used to determine whether the actual position is ω or ω+π.
摘要翻译： 本发明指出了多个转子位置中的正确的一个。 例如，本发明可以在PM机器中确定当位置仅在±pi弧度内已知位置时，转子处于两个可能位置中的哪一个位置。 如果实际的转子位置已知为ω和ω+ pi之一，例如由分解器指示，则所提出的发明可用于确定实际位置是ω或ω+ pi。
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