公开(公告)号：US09481252B1

公开(公告)日：2016-11-01

申请号：US14724767

申请日：2015-05-28

Applicant: CATERPILLAR INC.

Inventor： Baojun Si ,  Dustin C. Selvey ,  William J. Tate ,  Mary Jill Trumper ,  Alexander Cameron Crosman, III

IPC: H02P3/14 ,  B60L7/20 ,  H02P27/04 ,  B60L7/06

CPC classification number: B60L7/20 ,  B60L7/06 ,  B60L7/14 ,  B60L11/123 ,  B60L11/1861 ,  B60L15/007 ,  B60L15/2009 ,  B60L2210/30 ,  B60L2210/40 ,  H02P3/14 ,  H02P27/06

Abstract: 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.

Abstract translation: 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：US09951497B2

公开(公告)日：2018-04-24

申请号：US15137916

申请日：2016-04-25

Applicant: Caterpillar Inc.

Inventor： Xinyu Ge ,  Baojun Si ,  Yingying Kuai

IPC: B60K5/00 ,  E02F9/20 ,  E02F3/64 ,  E02F3/65

CPC classification number: E02F9/2062 ,  E02F3/6409 ,  E02F3/652 ,  E02F9/2091 ,  E02F9/2095

Abstract: A hybrid power train system for a tractor scraper is provided. The hybrid power train system may include a primary power source coupled to a first set of traction devices, a generator coupled to the primary power source, a first electric motor coupled to a second set of traction devices, an inverter circuit coupled to the generator and the first electric motor, an energy storage device coupled to the inverter circuit, and a controller operatively coupled to the inverter circuit. The controller may be configured to engage a first operation mode enabling electrical energy, supplied by the generator and the first electric motor, to be stored in the energy storage device, and engage a second operation mode enabling electrical energy, stored in the energy storage device, to be supplied to the first electric motor to drive the second set of traction devices.

公开(公告)号：US20140167779A1

公开(公告)日：2014-06-19

申请号：US13718184

申请日：2012-12-18

Applicant: CATERPILLAR INC.

Inventor： Baojun Si

IPC: G01R31/02

CPC classification number: G01R31/42

Abstract: A ground fault detection system may include a direct current (DC) voltage source and an alternating current (AC) device. The ground fault detection system may also include an inverter, coupled to the DC voltage source, the AC device and an electrical ground, including: a positive rail, a negative rail and a plurality of switch elements, wherein each of the plurality of switch elements may be coupled to the positive rail, the negative rail and the AC device. The ground fault detection system may further include a voltage monitoring device coupled to the positive rail, the negative rail and the electrical ground and an electronic controller, coupled to the inverter and the voltage monitoring device configured to: control the plurality of switching elements, sample a voltage potential across the voltage monitoring device at predetermined time periods and determine a ground fault of the inverter based at least in part on the sampled voltage potential and the predetermined time periods.

Abstract translation: 接地故障检测系统可以包括直流（DC）电压源和交流（AC）装置。 接地故障检测系统还可以包括耦合到DC电压源，AC装置和电接地的逆变器，包括：正轨，负轨和多个开关元件，其中多个开关元件 可以耦合到正轨，负轨和AC设备。 接地故障检测系统还可以包括耦合到正轨，负轨和电接地的电压监测装置和耦合到逆变器的电子控制器，以及电压监测装置，其被配置为：控制多个开关元件，样品 电压监视装置在预定时间段周围的电压电位，并且至少部分地基于采样的电压电势和预定的时间段来确定逆变器的接地故障。

公开(公告)号：US20170306589A1

公开(公告)日：2017-10-26

申请号：US15137916

申请日：2016-04-25

Applicant: Caterpillar Inc.

Inventor： Xinyu Ge ,  Baojun Si ,  Yingying Kuai

IPC: E02F9/20 ,  E02F3/65 ,  E02F3/64

CPC classification number: E02F9/2062 ,  E02F3/6409 ,  E02F3/652 ,  E02F9/2091 ,  E02F9/2095

Abstract: A hybrid power train system for a tractor scraper is provided. The hybrid power train system may include a primary power source coupled to a first set of traction devices, a generator coupled to the primary power source, a first electric motor coupled to a second set of traction devices, an inverter circuit coupled to the generator and the first electric motor, an energy storage device coupled to the inverter circuit, and a controller operatively coupled to the inverter circuit. The controller may be configured to engage a first operation mode enabling electrical energy, supplied by the generator and the first electric motor, to be stored in the energy storage device, and engage a second operation mode enabling electrical energy, stored in the energy storage device, to be supplied to the first electric motor to drive the second set of traction devices.

公开(公告)号：US09502998B1

公开(公告)日：2016-11-22

申请号：US14714507

申请日：2015-05-18

Applicant: CATERPILLAR INC.

Inventor： Baojun Si

IPC: H02P21/00 ,  H02P6/08 ,  H02P27/06

CPC classification number: H02P21/30 ,  H02M2007/53876

Abstract: Systems and methods are disclosed for controlling a torque output by an AC motor drawing power from a DC bus. According to certain embodiments, the system for controlling the torque output has a controller and an inverter. The controller further has an operation status detector, a basic voltage vector calculator, and a voltage command generator. The operation status detector is configured to determine a DC bus voltage and a rotor field vector. The basic voltage vector calculator is configured to calculate a plurality of basic voltage vectors having a magnitude proportional to the DC bus voltage. The voltage command generator is configured to generate a voltage command for producing a stator field vector. Producing the stator field vector includes at least one of maintaining a constant angle between the stator field vector and the rotor field vector, and setting a magnitude of the stator field vector equal to the magnitude of the plurality of basic voltage vectors. The inverter is electrically connected to the controller and configured to receive the voltage command. The inverter is also configured to convert the DC bus voltage to one or more AC voltage signals according to the voltage command. The inverter is further configured to apply the one or more AC voltage signals to the AC motor to produce the stator field vector.

Abstract translation: 公开了用于控制由AC电动机从DC总线吸取功率的转矩输出的系统和方法。 根据某些实施例，用于控制转矩输出的系统具有控制器和逆变器。 控制器还具有操作状态检测器，基本电压矢量计算器和电压指令发生器。 操作状态检测器被配置为确定DC总线电压和转子磁场矢量。 基本电压矢量计算器被配置为计算具有与DC总线电压成比例的幅度的多个基本电压矢量。 电压指令发生器被配置为产生用于产生定子磁场矢量的电压命令。 产生定子磁场矢量包括保持定子磁场矢量和转子磁场矢量之间的恒定角度，以及将定子磁场矢量的大小设置为等于多个基本电压矢量的大小的至少一个。 逆变器电连接到控制器并被配置为接收电压命令。 逆变器还被配置为根据电压指令将DC总线电压转换成一个或多个AC电压信号。 逆变器还被配置为将一个或多个AC电压信号施加到AC电动机以产生定子磁场矢量。

公开(公告)号：US20140176129A1

公开(公告)日：2014-06-26

申请号：US13724367

申请日：2012-12-21

Applicant: CATERPILLAR INC.

Inventor： Baojun Si ,  Osama Alkhouli

IPC: G01B7/30

CPC classification number: G01D5/245

Abstract: A system for determining an initial rotor position of an interior permanent magnet (IPM) machine having a rotor and a stator is provided. The system may include a drive circuit in operative and electrical communication with each phase of the IPM machine, and a controller in electrical communication with the drive circuit. The controller may be configured to engage the drive circuit to selectively apply a voltage signal to each phase of the stator of the IPM machine, detect a current signal through each phase corresponding to the applied voltage signal, and calculate the initial rotor position based on a least squares analysis between at least the voltage signal, the current signal and a predefined inductance of the IPM machine.

Abstract translation: 提供一种用于确定具有转子和定子的内部永磁体（IPM）机器的初始转子位置的系统。 该系统可以包括与IPM机器的每个相位进行操作和电气通信的驱动电路，以及与驱动电路电连通的控制器。 控制器可以被配置为接合驱动电路以选择性地将电压信号施加到IPM机器的定子的每个相位，通过与所施加的电压信号相对应的每个相位来检测电流信号，并且基于 在至少电压信号，电流信号和IPM机器的预定电感之间进行最小二乘法分析。

公开(公告)号：US09175984B2

公开(公告)日：2015-11-03

申请号：US13724367

申请日：2012-12-21

Applicant: Caterpillar Inc.

Inventor： Baojun Si ,  Osama Alkhouli

IPC: G01B7/30 ,  G01D5/245

CPC classification number: G01D5/245

Abstract: A system for determining an initial rotor position of an interior permanent magnet (IPM) machine having a rotor and a stator is provided. The system may include a drive circuit in operative and electrical communication with each phase of the IPM machine, and a controller in electrical communication with the drive circuit. The controller may be configured to engage the drive circuit to selectively apply a voltage signal to each phase of the stator of the IPM machine, detect a current signal through each phase corresponding to the applied voltage signal, and calculate the initial rotor position based on a least squares analysis between at least the voltage signal, the current signal and a predefined inductance of the IPM machine.

Abstract translation: 提供一种用于确定具有转子和定子的内部永磁体（IPM）机器的初始转子位置的系统。 该系统可以包括与IPM机器的每个相位进行操作和电气通信的驱动电路，以及与驱动电路电连通的控制器。 控制器可以被配置为接合驱动电路以选择性地将电压信号施加到IPM机器的定子的每个相位，通过与所施加的电压信号相对应的每个相位来检测电流信号，并且基于 在至少电压信号，电流信号和IPM机器的预定电感之间进行最小二乘法分析。

公开(公告)号：US20150244290A1

公开(公告)日：2015-08-27

申请号：US14711846

申请日：2015-05-14

Applicant: Caterpillar Inc.

Inventor： Baojun Si ,  Dustin Selvey ,  William J. Tate ,  Michael Jensen

IPC: H02P3/14

CPC classification number: H02P3/18 ,  B60L1/003 ,  B60L1/06 ,  B60L7/14 ,  B60L15/007 ,  B60L15/2009 ,  B60L50/13 ,  B60L50/40 ,  B60L2210/30 ,  B60L2210/40 ,  B60L2240/12 ,  B60L2240/34 ,  B60L2240/421 ,  B60L2240/423 ,  B60L2240/441 ,  B60L2240/443 ,  Y02T10/645 ,  Y02T10/70 ,  Y02T10/7022 ,  Y02T10/7077 ,  Y02T10/7241 ,  Y02T10/7275

Abstract: The present disclosure is related to a method for regenerative braking of a machine. The machine includes an electric drive assembly. The electric drive assembly includes a generator, a motor and a direct current bus and a regenerative brake assembly disposed between them. The regenerative braking assembly includes an inverter. The method includes connecting a phase leg between the direct current bus and the inverter. The phase leg includes an inductor and an electric switch. The phase leg boosts the regenerative voltage. The boosted regenerative voltage is then fed back to control a braking torque from the motor and directed back to the generator.

Abstract translation: 本公开涉及一种机器的再生制动方法。 该机器包括电驱动组件。 电驱动组件包括发电机，电动机和直流母线以及设置在它们之间的再生制动组件。 再生制动组件包括逆变器。 该方法包括在直流总线和逆变器之间连接相支路。 相位支路包括电感器和电开关。 相位腿提高再生电压。 然后将升压的再生电压反馈以控制来自电动机的制动转矩并且引导回发电机。

公开(公告)号：US20160276962A1

公开(公告)日：2016-09-22

申请号：US14661791

申请日：2015-03-18

Applicant: Caterpillar Inc.

Inventor： Ahmed Khalil ,  Ernesto Inoa ,  Baojun Si ,  Srikar Thaduvayi ,  William J. Tate

IPC: H02P6/00 ,  H02P6/04 ,  H02P6/08

CPC classification number: H02P21/22 ,  B60L15/2045 ,  B60L2200/44 ,  B60L2240/421 ,  B60L2240/423 ,  B60L2240/527 ,  H02P21/0089 ,  H02P2006/045 ,  Y02P90/60 ,  Y02T10/643 ,  Y02T10/644 ,  Y02T10/645 ,  Y02T10/72 ,  Y02T10/7283 ,  Y02T90/16

Abstract: A control system for an alternating current (AC) machine having a rotor and a stator is disclosed. The control system may include a direct current (DC) link providing a variable DC link voltage; an inverter module operatively coupled between the DC link and the AC machine, and a controller in communication with the inverter module. The inverter module may include a plurality of gates in selective communication with each phase of the stator. The controller may be configured to receive a signal indicative of the variable DC link voltage, receive a signal indicative of a rotational speed of the rotor, receive a torque command, and generate a direct-axis current command and a quadrature-axis current command using the variable DC link voltage, the rotational speed, and the torque command as inputs into a three-dimensional lookup table preprogrammed into a memory associated with the controller.

Abstract translation: 公开了一种具有转子和定子的交流（AC）机器的控制系统。 控制系统可以包括提供可变DC链路电压的直流（DC）链路; 可操作地耦合在DC链路和AC电机之间的逆变器模块，以及与逆变器模块通信的控制器。 逆变器模块可以包括与定子的每个相位选择性地连通的多个门。 控制器可以被配置为接收指示可变直流母线电压的信号，接收指示转子的转速的信号，接收转矩指令，并且使用以下方式生成直轴电流指令和正交轴电流指令： 可变直流链路电压，转速和转矩指令作为预先编程到与控制器相关联的存储器中的三维查找表的输入。

公开(公告)号：US20150244292A1

公开(公告)日：2015-08-27

申请号：US14711856

申请日：2015-05-14

Applicant: Caterpillar Inc.

Inventor： Baojun Si ,  Dustin Selvey ,  William J. Tate ,  Alexander C. Crosman, III

IPC: H02P3/22

CPC classification number: H02P3/22 ,  B60L7/22

Abstract: The present disclosure is related to a method for energy management for an electric drive system during regenerative braking of a machine. The machine includes an electric drive assembly. The electric drive assembly includes a generator, a motor, a primary direct current bus and a secondary direct current bus having a regenerative brake assembly. The method of energy management includes connecting at least a chopper and a crowbar across the secondary direct current bus. Further, the method includes directing a secondary power stored during regenerative braking, from the primary or secondary or both the buses through the chopper or the crowbar during fault condition.

Abstract translation: 本公开涉及一种用于机器的再生制动期间的电驱动系统的能量管理方法。 该机器包括电驱动组件。 电驱动组件包括发电机，电动机，初级直流母线和具有再生制动组件的二次直流母线。 能量管理方法包括至少连接二次直流总线上的斩波器和撬棒。 此外，该方法包括在故障状态期间，通过斩波器或撬棍引导在再生制动期间存储的次级功率，来自初级或次级或两者的总线。