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公开(公告)号：US10193475B2
公开(公告)日：2019-01-29
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: H02P25/08 , H02P6/18 , H02P6/185 , 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.
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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.
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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.
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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.
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Patent Agency Ranking
公开(公告)号：US09738163B2
公开(公告)日：2017-08-22
申请号：US14558001
申请日：2014-12-02
Applicant: Caterpillar Inc.
CPC classification number: B60L11/08 , B60L2200/32 , B60L2200/40 , H02M1/15 , H02M7/4826 , H02M7/5387 , H02M2001/008 , Y02T10/70 , Y02T10/7077
Abstract: The present disclosure is directed to an electric drive. The electric drive may include a first power inverter, a second power inverter, and a positive DC bus connecting the first power inverter and the second power inverter. The electric drive may also include a first switch connected to the positive DC bus between the first power inverter and the second power inverter. The electric drive may include a second switch connected to the positive DC bus between the first power inverter and the second power inverter. The electric drive may further include a control unit connected to the first switch and to the second switch. The control unit may be configured to selectively allow current to pass through the first switch and the second switch.
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46.发明授权公开(公告)号：US09702938B2
公开(公告)日：2017-07-11
申请号：US14661193
申请日：2015-03-18
Applicant: Caterpillar Inc.
Inventor： Jesse R. Gerdes , Jackson Wai , Ahmed Khalil , Benjamin P. Gottemoller
CPC classification number: G01R31/343 , B60L3/0061
Abstract: A method for detecting a phase imbalance of an electrical component in a machine due to an actual fault is provided. The method includes receiving electrical parameter values associated with a plurality of phases of an electrical component, detecting a phase imbalance in the plurality of phases, calculating an imbalance ratio of the plurality of phases, applying a plurality of conditions to the imbalance ratio and to the received input vector, the plurality of conditions being associated with an actual fault in the machine, and determining whether the detected phase imbalance is due to a controls induced imbalance in the machine or due to the actual fault in the electrical component of the machine when at least one of the plurality of conditions is met.
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47.发明申请Method and Apparatus for Detecting Phase Imbalance of an Electrical Component in a Machine 有权用于检测机器中电气部件的相位不平衡的方法和装置公开(公告)号：US20160274191A1
公开(公告)日：2016-09-22
申请号：US14661193
申请日：2015-03-18
Applicant: Caterpillar Inc.
Inventor： Jesse R. Gerdes , Jackson Wai , Ahmed Khalil , Benjamin P. Gottemoller
CPC classification number: G01R31/343 , B60L3/0061
Abstract: A method for detecting a phase imbalance of an electrical component in a machine due to an actual fault is provided. The method includes receiving electrical parameter values associated with a plurality of phases of an electrical component, detecting a phase imbalance in the plurality of phases, calculating an imbalance ratio of the plurality of phases, applying a plurality of conditions to the imbalance ratio and to the received input vector, the plurality of conditions being associated with an actual fault in the machine, and determining whether the detected phase imbalance is due to a controls induced imbalance in the machine or due to the actual fault in the electrical component of the machine when at least one of the plurality of conditions is met.
Abstract translation: 提供了一种用于检测由于实际故障导致的机器中的电气部件的相位不平衡的方法。 该方法包括接收与电气部件的多个相位相关联的电参数值，检测多个相位中的相位不平衡，计算多个相位的不平衡比，将多个条件应用于不平衡比和 接收的输入向量，多个条件与机器中的实际故障相关联，并且确定检测到的相位不平衡是由于控制引起机器中的不平衡还是由于当机器的电气部件中的实际故障时 满足多种条件中的至少一种。
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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。
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公开(公告)号：US20150028788A1
公开(公告)日：2015-01-29
申请号：US13951068
申请日：2013-07-25
Applicant: Caterpillar, Inc.
Inventor： Jackson Wai , Ahmed Khalil , Carlos Nino Baron , Jesse Gerdes , Brad A. Kough
IPC: H02P27/06
CPC classification number: H02P27/06 , H02P25/0925
Abstract: A method of controlling a motor is provided. The method may determine one of a switching period, a fundamental cycle, and a current target per phase leg of the motor having at least one high voltage transition point; determine a dwell period to be enforced at the transition point between an engagement of a first switch of the phase leg and an engagement of a second switch of the phase leg where each of the first switch and the second switch may be selectively engageable between a first state and a second state; engage the first switch from the first state to the second state at the transition point; and engage the second switch from the first state to the second state after the transition point and upon expiration of the dwell period.
Abstract translation: 提供一种控制电动机的方法。 该方法可以确定具有至少一个高电压转变点的电动机的开关周期，基本周期和每相支路的当前目标之一; 确定在所述相腿的第一开关的接合和所述相腿的第二开关的接合之间的过渡点处的停留时段，其中所述第一开关和所述第二开关中的每一个可以选择性地接合在第一 状态和第二状态; 在转换点将第一开关从第一状态转移到第二状态; 并且在转换点之后并且在停留时段期满时将第二开关从第一状态转移到第二状态。
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