-
公开(公告)号：US09234931B2
公开(公告)日：2016-01-12
申请号：US13790906
申请日：2013-03-08
Applicant: CATERPILLAR INC.
Inventor： Robert W. Lindsey , Daniel D. Podany , Sangameshwar Sonth , Thomas M. Sopko , Richard G. Auch , Jason Miller
CPC classification number: G01R31/025 , E01C19/22 , E01C2301/10 , G01R31/006
Abstract: A fault detection system for a machine having a plurality of electrical conducting elements insulated from a frame ground of the machine is disclosed. The fault detection system may include a high voltage DC power source, a positive high voltage bus connected to a positive terminal of the high voltage DC power source and providing high voltage electrical power to the plurality of electrical conducting elements, and a negative high voltage bus connected to a negative terminal of the high voltage DC power source and returning high voltage electrical power from the plurality of electrical conducting elements. At least one of the positive and negative high voltage buses may be selectively connected through a plurality of switches to plural zones of the electrical conducting elements, with each of the plural zones being electrically connected in parallel, and selectively connected to the high voltage DC power source by one of the plurality of switches. A low voltage DC power source may be configured to form part of a leakage current detector selectively connected through each of the plurality of switches to each of the plural zones for detecting leakage current between an electrical conducting element and the frame ground.
Abstract translation: 公开了一种用于机器的故障检测系统，其具有与机器的框架接地绝缘的多个导电元件。 故障检测系统可以包括高压直流电源，连接到高压直流电源的正端的正高压母线，并向多个导电元件提供高压电力，以及负高压母线 连接到高压直流电源的负极端子并从多个导电元件返回高压电力。 正极和负极高压母线中的至少一个可以通过多个开关选择性地连接到导电元件的多个区域，其中多个区域中的每一个并联电连接，并且选择性地连接到高压DC电力 源由多个开关中的一个开关。 低压DC电源可以被配置成形成漏电流检测器的一部分，该漏电流检测器通过多个开关中的每一个选择性地连接到多个区域中的每一个，以检测导电元件和框架接地之间的漏电流。
-
公开(公告)号：US10666182B1
公开(公告)日：2020-05-26
申请号：US15947540
申请日：2018-04-06
Applicant: Caterpillar Inc.
Inventor： Carlos E. Nino Baron , Ahmed Khalil , Jackson Wai , Jesse R. Gerdes , Sangameshwar Sonth , Amir Saad
Abstract: A control system for a rotary electric machine includes a controller configured to generate dynamic input current data based upon a dynamic analysis of self flux data, mutual flux data, and saturation scaling factor data. Upon generating a torque request, the controller is configured to determine a desired electrical input based upon the dynamic input current data to generate the desired output torque. The desired electrical input includes a magnitude and duration of an electrical pulse and a desired angular position of the rotor of the rotary electric machine relative to the stator of the machine. The controller determines an angular position of the rotor and generates an operating command to generate the desired electrical input at the desired angular position of the rotor to propel the rotary electric machine and generate the desired output torque. A rotary electric machine and method of operating same are provided.
-
公开(公告)号：US20190160965A1
公开(公告)日：2019-05-30
申请号：US15827272
申请日：2017-11-30
Applicant: Caterpillar Inc.
Inventor： Brian D. Kuras , Sangameshwar Sonth , Arkit Sharma
Abstract: A control system for controlling operation of a drive motor includes an input device for providing a command signal that is indicative of a desired speed and direction of rotation of the drive motor. A sensor is associated with the drive motor and adapted to provide a sensor signal indicative of current rotational speed of the drive motor. A controller receives the command signal, and determine whether the command signal is indicative of a desired zero speed to be associated with the drive motor. The controller also receives the sensor signal, and determine whether the current rotational speed of the drive motor is within a pre-defined range of difference from the desired zero speed. The controller then generates a de-rated torque command signal having a reduced gain factor, and reduce the current rotational speed of the drive motor based on the de-rated torque command signal.
-
Patent Agency Ranking
公开(公告)号：US10097117B2
公开(公告)日：2018-10-09
申请号：US15380790
申请日：2016-12-15
Applicant: Caterpillar Inc.
Inventor： Ahmed Khalil , Seok-Hee Han , Jackson Wai , Sangameshwar Sonth , Jesse Gerdes , James M. Thorne
IPC: H02P6/00 , H02P6/185 , H02P25/089
Abstract: A control system is provided for an electric machine having a rotor and a stator. The control system has a converter circuit in electrical communication with the stator and a controller in electrical communication with the converter circuit. The controller is configured to receive a first signal indicating a torque applied to or output by the rotor and receive a second signal indicating a rotational speed of the rotor. The controller is also configured to determine at least one characteristic of a pulse signal based on at least one of the first or second signal. The controller is also configured to inject the pulse signal into one or more phases of the stator via the converter circuit according to the determined at least one characteristic. The controller is also configured to determine a position of the rotor based on the injected pulse signal.
-
公开(公告)号：US09800192B1
公开(公告)日：2017-10-24
申请号：US15093477
申请日：2016-04-07
Applicant: Caterpillar Inc.
Inventor： Seok-hee Han , Jackson Wai , Ahmed Khalil , Jesse Gerdes , James Michael Thorne , Sangameshwar Sonth
IPC: H02P25/08 , H02P25/092 , H02P23/14
CPC classification number: H02P25/092 , H02P23/14 , H02P25/089
Abstract: A control system for a multi-phase switched reluctance (SR) machine, having at least two phases, is disclosed. The control system may include a converter circuit and a controller. The controller may include a phase voltage estimator module configured to determine a first phase voltage and a second phase voltage associated with a second phase second phase for the SR machine. The controller may further include a flux estimator module configured to determine first and second estimated fluxes, the first estimated flux associated with the first phase and based on the first phase voltage and an associated first mutual voltage and the second estimated flux the second estimated flux associated with the second phase and based on the second phase voltage and an associated second mutual voltage, and a position observer module configured to determine a rotor position based at least partially on the first estimated flux, the second mutual flux.
-
公开(公告)号：US20170294858A1
公开(公告)日：2017-10-12
申请号：US15093477
申请日：2016-04-07
Applicant: Caterpillar Inc.
Inventor： Seok-hee Han , Jackson Wai , Ahmed Khalil , Jesse Gerdes , James Michael Thorne , Sangameshwar Sonth
IPC: H02P25/092 , H02P23/14
CPC classification number: H02P25/092 , H02P23/14 , H02P25/089
Abstract: A control system for a multi-phase switched reluctance (SR) machine, having at least two phases, is disclosed. The control system may include a converter circuit and a controller. The controller may include a phase voltage estimator module configured to determine a first phase voltage and a second phase voltage associated with a second phase second phase for the SR machine. The controller may further include a flux estimator module configured to determine first and second estimated fluxes, the first estimated flux associated with the first phase and based on the first phase voltage and an associated first mutual voltage and the second estimated flux the second estimated flux associated with the second phase and based on the second phase voltage and an associated second mutual voltage, and a position observer module configured to determine a rotor position based at least partially on the first estimated flux, the second mutual flux.
-
公开(公告)号：US09694849B2
公开(公告)日：2017-07-04
申请号：US14955510
申请日：2015-12-01
Applicant: Caterpillar Inc.
Inventor： Brian Dean Kuras , Sangameshwar Sonth
CPC classification number: B62D11/003 , B62D6/10 , B62D11/04 , B62D55/06 , B62D55/08
Abstract: A steering control system is disclosed for use with a machine. The steering control system may have left and right motors, at least one input device configured to generate first and second signals indicative of desired speed and desired steering, a left speed sensor configured to generate a third signal, and a right speed sensor configured to generate a fourth signal. The steering control system may further have a controller configured to determine a difference between desired and actual steering based on the second, third, and fourth signals, to determine a steering command change that should be implemented based on the difference, and to determine a gain based on the second signal. The controller may also be configured to adjust the steering command change as a function of the gain, and to selectively apply the adjusted steering command change to one of the left and right motors.
-
公开(公告)号：US08970291B1
公开(公告)日：2015-03-03
申请号：US14101408
申请日：2013-12-10
Applicant: Caterpillar Inc.
Inventor： Jesse R Gerdes , Jackson Wai , Benjamin Paul Gottemoller , Sangameshwar Sonth
IPC: H03L9/00 , H03K17/16 , H03K5/1252
CPC classification number: H03K5/1252
Abstract: A method of debouncing a variable frequency step signal is provided. The method includes the steps of: (a) determining a first period in oscillations of the variable frequency step signal and applying a first debounce time to debounce oscillations in the variable frequency step signal, (b) detecting a second period in the oscillations of the variable frequency step signal, (c) calculating a second debounce time as a fraction of the first period, (d) applying the second debounce time to debounce oscillations having the second period, and (e) repeating the steps (b)-(d) for debouncing successive oscillations of varying periods in the variable frequency step signal.
Abstract translation: 提供了一种去抖动可变频率步进信号的方法。 该方法包括以下步骤：（a）确定可变频率步进信号的振荡中的第一周期，并施加第一去抖动时间以使可变频率步长信号中的振荡去抖动，（b）检测第二周期的振荡， （c）计算作为第一周期的一部分的第二去抖动时间，（d）应用第二去抖时间去抖动具有第二周期的振荡，以及（e）重复步骤（b） - （d ）用于在可变频率步长信号中去抖动不同周期的连续振荡。
-
-
-
-
-
-
-
Search Results
18
records
(took 0.015 seconds)
