公开(公告)号：US20170126156A1

公开(公告)日：2017-05-04

申请号：US15317487

申请日：2015-05-18

Applicant: Caterpillar Inc.

Inventor： Seok-hee Han ,  Carlos Nino Baron ,  Jackson Wai ,  Ahmed Khalil ,  Ernesto Inoa ,  Jesse Gerdes ,  James Michael Thorne

IPC: H02P6/185 ,  H02P27/06 ,  H02P25/089

CPC classification number: H02P6/185 ,  H02P6/18 ,  H02P25/08 ,  H02P25/089 ,  H02P27/06

Abstract: A method for determining rotor position of a switched reluctance (SR) machine having a rotor and a stator is provided. The method may include injecting a test pulse into one or more idle phases of the SR machine, determining a decoupled flux value based at least partially on a total flux value corresponding to the test pulse and a mutual flux value, and determining the rotor position based at least partially on the decoupled flux value.

公开(公告)号：US20160301347A1

公开(公告)日：2016-10-13

申请号：US14683610

申请日：2015-04-10

Applicant: Caterpillar Inc.

Inventor： Jesse Gerdes ,  Jackson Wai ,  Ahmed Khalil ,  Ernesto Inoa ,  Carlos Nino Baron

IPC: H02P25/08

CPC classification number: H02P25/08 ,  H02P23/0027 ,  H02P23/03

Abstract: A method of regulating a phase current of an electric motor is provided. The method may include selectively enabling one or more switches of each phase of the electric motor according to one of at least a soft chopping motoring routine and a soft chopping generating routine, monitoring the phase current relative to at least one limit of a hysteresis band and a switching period, and controlling the switches according to a hard chopping routine when the phase current does not reach the limit within the switching period.

Abstract translation: 提供一种调节电动机的相电流的方法。 该方法可以包括根据至少软斩波电动程序和软斩波产生程序中的至少一个选择性地启用电动机的每个相的一个或多个开关，监测相对于滞后带的至少一个极限的相电流，以及 开关周期，并且当相电流在开关周期内未达到极限时，根据硬切断程序来控制开关。

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。