-
公开(公告)号：US08928260B2
公开(公告)日：2015-01-06
申请号：US13655019
申请日：2012-10-18
申请人： Caterpillar Inc.
IPC分类号： H02P3/00
CPC分类号： H02P23/14 , B60L3/10 , H02P21/141 , H02P21/16 , H02P23/0077 , H02P2205/03 , H02P2205/05 , Y02T10/7258
摘要： A traction motor system calculates motor flux by generating a real time effective resistance of a resistance grid calculated from motor torque and measured voltage on a DC link. Calculating effective resistance avoids solely relying on DC link voltage, which can be influenced by conditions such as wheel slip and drop out of one or more resistance grids. The effective resistance calculation is based on nominal motor values using known power levels and conditions. From these nominal values and the effective resistance, various scaling factors based on actual motor power can be generated and used to adjust a nominal flux reference to more accurately reflect actual motor flux. The scaling factors include power and torque scaling factors and a resistance scaling factor that is active during conditions such as wheel slip.
摘要翻译： 牵引电动机系统通过产生由电动机转矩和DC链路上的测量电压计算的电阻网格的实时有效电阻来计算电动机通量。 计算有效电阻只能依赖于直流母线电压，这可能受到诸如车轮滑移和掉落一个或多个电阻网格等因素的影响。 有效电阻计算基于使用已知功率电平和条件的电机额定值。 根据这些标称值和有效电阻，可以生成基于实际电机功率的各种缩放因子，并用于调整额定通量参考值，以更精确地反映实际的电机通量。 缩放因子包括功率和扭矩缩放因子以及在诸如车轮滑移的条件下有效的阻力比例因子。
-
公开(公告)号：US09481252B1
公开(公告)日：2016-11-01
申请号：US14724767
申请日：2015-05-28
申请人： CATERPILLAR INC.
发明人： Baojun Si , Dustin C. Selvey , William J. Tate , Mary Jill Trumper , Alexander Cameron Crosman, III
CPC分类号： B60L7/20 , B60L7/06 , B60L7/14 , B60L11/123 , B60L11/1861 , B60L15/007 , B60L15/2009 , B60L2210/30 , B60L2210/40 , H02P3/14 , H02P27/06
摘要： Systems and methods are disclosed for reducing engine fuel consumption during regenerative braking. According to certain embodiments, the regenerative braking system has an engine, a generator, a rectifier, a first inverter, a traction motor, and a reverse recovery unit. The generator is configured to be driven by the engine to produce AC electrical power. The rectifier is configured to receive AC electrical power from the generator and convert the AC power to DC power. The first inverter is configured to receive the DC power and convert the DC power to AC power. The traction motor is configured to be driven by the AC power in a traction mode, and to produce regenerated power when rotated in reverse in a regenerative braking mode. The reverse recovery unit has a second inverter and a filter. The second inverter is electrically connected in parallel with the rectifier and configured to communicate at least part of the regenerated power from the traction motor to the generator during the regenerative braking mode. The filter is electrically connected downstream of the second inverter and in parallel with the rectifier. The filter is configured to filter transient voltage generated by the second inverter during the regenerative braking mode.
摘要翻译： 公开了用于在再生制动期间减少发动机燃料消耗的系统和方法。 根据某些实施例，再生制动系统具有发动机，发电机，整流器，第一逆变器，牵引电动机和反向恢复单元。 发电机构造成由发动机驱动以产生交流电力。 整流器被配置为从发电机接收AC电力并将AC电力转换成DC电力。 第一个反相器配置为接收直流电，并将直流电转换成交流电源。 牵引电动机被配置为在牵引模式下由交流电驱动，并且在再生制动模式下反向旋转时产生再生电力。 反向恢复单元具有第二反相器和滤波器。 第二逆变器与整流器并联电连接并且被配置为在再生制动模式期间将来自牵引电动机的再生功率的至少一部分传递到发电机。 滤波器电连接在第二反相器的下游并与整流器并联。 滤波器被配置为在再生制动模式期间过滤由第二逆变器产生的瞬态电压。
-
公开(公告)号：US20150028782A1
公开(公告)日：2015-01-29
申请号：US14516230
申请日：2014-10-16
申请人： Caterpillar Inc.
CPC分类号： H02P23/14 , B60L3/10 , H02P21/141 , H02P21/16 , H02P23/0077 , H02P2205/03 , H02P2205/05 , Y02T10/7258
摘要： A traction motor system calculates motor flux by generating a real time effective resistance of a resistance grid calculated from motor torque and measured voltage on a DC link. Calculating effective resistance avoids solely relying on DC link voltage, which can be influenced by conditions such as wheel slip and drop out of one or more resistance grids. The effective resistance calculation is based on nominal motor values using known power levels and conditions. From these nominal values and the effective resistance, various scaling factors based on actual motor power can be generated and used to adjust a nominal flux reference to more accurately reflect actual motor flux. The scaling factors include power and torque scaling factors and a resistance scaling factor that is active during conditions such as wheel slip.
摘要翻译： 牵引电动机系统通过产生由电动机转矩和DC链路上的测量电压计算的电阻网格的实时有效电阻来计算电动机通量。 计算有效电阻只能依赖于直流母线电压，这可能受到诸如车轮滑移和掉落一个或多个电阻网格等因素的影响。 有效电阻计算基于使用已知功率电平和条件的电机额定值。 根据这些标称值和有效电阻，可以生成基于实际电机功率的各种缩放因子，并用于调整额定通量参考值，以更精确地反映实际的电机通量。 缩放因子包括功率和转矩缩放因子以及在诸如车轮滑移的条件下有效的阻力比例因子。
-
公开(公告)号：US20230170542A1
公开(公告)日：2023-06-01
申请号：US17457079
申请日：2021-12-01
申请人： Caterpillar Inc.
IPC分类号： H01M10/48 , H01M10/0525 , B61C3/02
CPC分类号： H01M10/48 , H01M10/0525 , B61C3/02 , H01M2220/20
摘要： A system for initializing operations of one or more batteries of a lithium-ion battery pack to supply electric power to an electrical load includes a switching device, an output device, and a controller. The switching device is configured to move between a first position to facilitate supply of electric power from the batteries to the electrical load and a second position to restrict supply of electric power from the batteries to the electrical load. The output device is configured to be activated to indicate an availability of the batteries to supply electric power to the electrical load. The controller receives an input, actuates a contactor associated with at least one battery to facilitate electrical connection between the at least one battery and the electrical load, and moves the switching device to the first position to cause an activation of the output device in response to the actuation of the contactor.
-
公开(公告)号：US09344028B2
公开(公告)日：2016-05-17
申请号：US14516230
申请日：2014-10-16
申请人： Caterpillar Inc.
CPC分类号： H02P23/14 , B60L3/10 , H02P21/141 , H02P21/16 , H02P23/0077 , H02P2205/03 , H02P2205/05 , Y02T10/7258
摘要： A traction motor system calculates motor flux by generating a real time effective resistance of a resistance grid calculated from motor torque and measured voltage on a DC link. Calculating effective resistance avoids solely relying on DC link voltage, which can be influenced by conditions such as wheel slip and drop out of one or more resistance grids. The effective resistance calculation is based on nominal motor values using known power levels and conditions. From these nominal values and the effective resistance, various scaling factors based on actual motor power can be generated and used to adjust a nominal flux reference to more accurately reflect actual motor flux. The scaling factors include power and torque scaling factors and a resistance scaling factor that is active during conditions such as wheel slip.
-
公开(公告)号：US20140111125A1
公开(公告)日：2014-04-24
申请号：US13655019
申请日：2012-10-18
申请人： CATERPILLAR INC.
CPC分类号： H02P23/14 , B60L3/10 , H02P21/141 , H02P21/16 , H02P23/0077 , H02P2205/03 , H02P2205/05 , Y02T10/7258
摘要： A traction motor system calculates motor flux by generating a real time effective resistance of a resistance grid calculated from motor torque and measured voltage on a DC link. Calculating effective resistance avoids solely relying on DC link voltage, which can be influenced by conditions such as wheel slip and drop out of one or more resistance grids. The effective resistance calculation is based on nominal motor values using known power levels and conditions. From these nominal values and the effective resistance, various scaling factors based on actual motor power can be generated and used to adjust a nominal flux reference to more accurately reflect actual motor flux. The scaling factors include power and torque scaling factors and a resistance scaling factor that is active during conditions such as wheel slip.
摘要翻译： 牵引电动机系统通过产生由电动机转矩和DC链路上的测量电压计算的电阻网格的实时有效电阻来计算电动机通量。 计算有效电阻只能依赖于直流母线电压，这可能受到诸如车轮滑移和掉落一个或多个电阻网格等因素的影响。 有效电阻计算基于使用已知功率电平和条件的电机额定值。 根据这些标称值和有效电阻，可以生成基于实际电机功率的各种缩放因子，并用于调整额定通量参考值，以更精确地反映实际的电机通量。 缩放因子包括功率和扭矩缩放因子以及在诸如车轮滑移的条件下有效的阻力比例因子。
-
-
-
-
-
搜索结果
6 条记录 (耗时 0.013 秒)
