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公开(公告)号：US20170257041A1
公开(公告)日：2017-09-07
申请号：US15506785
申请日：2015-08-25
申请人： Kevin LEE , Kai WANG , Wenxi YAO , Eaton Corporation
CPC分类号： H02K17/02 , H02P1/28 , H02P1/30 , H02P23/0031 , H02P27/047 , H02P2103/10
摘要： The present invention provides an acceleration method for V/f controlled induction motor in flux-weakening region, which comprises: acquiring no-load magnetizing current Im of the induction motor at current stator frequency; selecting a smaller one of 0.5·Im(1/σ+1) and (Im2+σ)/(Im+σIm) as magnetizing current set point, in which σ is an estimated total leakage inductance coefficient; getting an error signal by subtracting the magnetizing current of the induction motor from the magnetizing current set point; determining the stator frequency for the next control period according to the error signal which is provided as a controlling variable of negative feedback. The acceleration method of the present invention can provide the maximum output torque in flux-weakening region and has a larger tolerance for the error of the estimated leakage inductance.
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公开(公告)号：US20160254763A1
公开(公告)日：2016-09-01
申请号：US15053680
申请日：2016-02-25
申请人： Eaton Corporation
发明人： Xiaoyuan Hong , Hao Luo , Kevin Lee
IPC分类号： H02P1/52
摘要： A connecting device for motor and supply network is provided, comprising: a Variable Frequency Drive (VFD), a first switch (S1) and a second switch (S2), wherein the Variable Frequency Drive (VFD) is connected in series to the first switch (S1), and the second switch (S2) is connected in parallel to the series circuit composed of the Variable Frequency Drive (VFD) and the first switch (S1). The connecting device of the invention further comprises a bidirectional Silicon Controlled Rectifier (SCR) or two anti-parallel single-directional Silicon Controlled Rectifiers (SCR1,SCR2), wherein the bidirectional Silicon Controlled Rectifier (SCR) or the two anti-parallel single-directional Silicon Controlled Rectifiers (SCR1,SCR2) is/are connected in parallel to the second switch (S2). The connecting device of the present invention would not be subject to high current surge when VFD bypassing, avoids the high cost for the overrating of the cable and the bypassing switch, and is easy to be implemented.
摘要翻译： 提供了一种用于电动机和供电网络的连接装置，包括：变频驱动（VFD），第一开关（S1）和第二开关（S2），其中变频驱动（VFD）串联连接到第一 开关（S1）和第二开关（S2）并联连接到由变频驱动（VFD）和第一开关（S1）组成的串联电路。 本发明的连接装置还包括双向硅控制整流器（SCR）或两个反并联单向硅控制整流器（SCR1，SCR2），其中双向硅控整流器（SCR）或两个反并联单相整流器 定向硅控整流器（SCR1，SCR2）与第二开关（S2）并联连接。 当VFD旁路时，本发明的连接装置不会受到高电流浪涌，避免了电缆和旁路开关的过高的高成本，并且易于实现。
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公开(公告)号：US10778122B2
公开(公告)日：2020-09-15
申请号：US15053680
申请日：2016-02-25
申请人： Eaton Corporation
发明人： Xiaoyuan Hong , Hao Luo , Kevin Lee
摘要： A connecting device for motor and supply network is provided, comprising: a Variable Frequency Drive (VFD), a first switch (S1) and a second switch (S2), wherein the Variable Frequency Drive (VFD) is connected in series to the first switch (S1), and the second switch (S2) is connected in parallel to the series circuit composed of the Variable Frequency Drive (VFD) and the first switch (S1). The connecting device of the invention further comprises a bidirectional Silicon Controlled Rectifier (SCR) or two anti-parallel single-directional Silicon Controlled Rectifiers (SCR1,SCR2), wherein the bidirectional Silicon Controlled Rectifier (SCR) or the two anti-parallel single-directional Silicon Controlled Rectifiers (SCR1,SCR2) is/are connected in parallel to the second switch (S2). The connecting device of the present invention would not be subject to high current surge when VFD bypassing, avoids the high cost for the overrating of the cable and the bypassing switch, and is easy to be implemented.
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4.发明申请V/F CONTROL METHOD FOR SUPPRESSING CURRENT OSCILLATION OF INDUCTION MOTOR 审中-公开用于抑制电动机电流振荡的V / F控制方法公开(公告)号：US20160226420A1
公开(公告)日：2016-08-04
申请号：US15021335
申请日：2014-05-30
申请人： EATON CORPORATION
CPC分类号： H02P27/047 , H02P21/05 , H02P23/04
摘要： The present invention provides a V/F control method for an induction motor comprising: extracting a reactive current and an active current and performing a differential calculation on them respectively to obtain a differential of the reactive current and a differential of the active current; multiplying the differential of the reactive current and the differential of the active current by a first coefficient and a second coefficient respectively; obtaining the sum of the result of multiplying the differential of the reactive current by the first coefficient and the result of multiplying the differential of the active current by the second coefficient; applying low-pass filtering on the sum to obtain a compensation; and superposing the compensation onto an original given angular frequency to perform V/F control.
摘要翻译： 本发明提供一种用于感应电动机的V / F控制方法，包括：分别提取无功电流和有功电流并对其进行微分计算，以获得无功电流的差分和有功电流的差值; 分别将无功电流的差分和有功电流的差分乘以第一系数和第二系数; 获得将无功电流的差值乘以第一系数的结果与将有效电流的差值乘以第二系数的结果之和; 对总和进行低通滤波以获得补偿; 并将补偿叠加到原始给定的角频率上以执行V / F控制。
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公开(公告)号：US10340776B2
公开(公告)日：2019-07-02
申请号：US15506785
申请日：2015-08-25
摘要： The present invention provides an acceleration method for V/f controlled induction motor in flux-weakening region, which comprises: acquiring no-load magnetizing current Im of the induction motor at current stator frequency; selecting a smaller one of 0.5·Im(1/σ+1) and (Im2+σ)/(Im+σIm) as magnetizing current set point, in which σ is an estimated total leakage inductance coefficient; getting an error signal by subtracting the magnetizing current of the induction motor from the magnetizing current set point; determining the stator frequency for the next control period according to the error signal which is provided as a controlling variable of negative feedback. The acceleration method of the present invention can provide the maximum output torque in flux-weakening region and has a larger tolerance for the error of the estimated leakage inductance.
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公开(公告)号：US10135378B2
公开(公告)日：2018-11-20
申请号：US15021335
申请日：2014-05-30
申请人： Eaton Corporation
摘要： The present invention provides a V/F control method for an induction motor comprising: extracting a reactive current and an active current and performing a differential calculation on them respectively to obtain a differential of the reactive current and a differential of the active current; multiplying the differential of the reactive current and the differential of the active current by a first coefficient and a second coefficient respectively; obtaining the sum of the result of multiplying the differential of the reactive current by the first coefficient and the result of multiplying the differential of the active current by the second coefficient; applying low-pass filtering on the sum to obtain a compensation; and superposing the compensation onto an original given angular frequency to perform V/F control.
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公开(公告)号：US09876461B2
公开(公告)日：2018-01-23
申请号：US15119047
申请日：2015-02-12
申请人： Eaton Corporation
发明人： Kevin Lee , Robert A. Fenton , Xiaoling Li , Leo Sun , Jiankun Xin
CPC分类号： H02P29/032 , H02P27/08 , H02P29/02 , H02P29/60
摘要： A control and protection apparatus for an electric motor, comprising an inverter (3), a first converter (1), a temperature detection apparatus (7), and a second converter (2). The first converter (1) is used for generating, on the basis of an input signal, a first control signal to control working of the inverter (3). The temperature detection apparatus (7) is used for detecting the temperature of the electric motor (4) and for acquiring a temperature signal. The second converter (2) is used for generating a second control signal on the basis of the temperature signal detected and for providing the second control signal to the inverter (3). The inverter (3) is used for controlling wording of the electric motor (4) on the basis of the first control signal and of the second control signal. The control and protection apparatus for the electric motor is low in costs and high in safety and reliability.
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公开(公告)号：US20160351325A1
公开(公告)日：2016-12-01
申请号：US15118943
申请日：2015-02-12
申请人： EATON CORPORATION
CPC分类号： H01F27/2828 , H01F3/14 , H01F27/306 , H01F27/324 , H01F27/33 , H01F2017/046
摘要： The present invention provides an inductance coil comprising a magnetic core and a coil, wherein the coil is formed by winding a flat wire, and the flat surface of the wire is perpendicular to the axis around which the coil is wound. The coil is wrapped with an insulating adhesive tape and the tape is wound on the wire around an axis which is substantially in line with the direction along which the wire forming the coil extends, so as to form an isolation layer on the surface of the coil. Additionally, the present invention provides an electromagnetic device including the above inductance coil.
摘要翻译： 本发明提供一种包括磁芯和线圈的电感线圈，其中线圈通过卷绕扁线形成，并且线的平坦表面垂直于卷绕线圈的轴线。 线圈被绝缘胶带包裹，并且磁带围绕基本上与形成线圈的线的延伸方向一致的轴线缠绕在线上，以在线圈的表面上形成隔离层 。 另外，本发明提供一种包括上述电感线圈的电磁装置。
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公开(公告)号：US09984164B2
公开(公告)日：2018-05-29
申请号：US13192805
申请日：2011-07-28
申请人： Eckart Walther , Qi Lu , David Ku , Kevin Lee , Chung-Man Tam , Ali Diab
发明人： Eckart Walther , Qi Lu , David Ku , Kevin Lee , Chung-Man Tam , Ali Diab
IPC分类号： G06F17/30
CPC分类号： G06F17/30867 , G06F17/30696 , G06F17/30864 , G06F17/30882 , G06F17/30935 , Y10S707/99942 , Y10S707/99943 , Y10S707/99944 , Y10S707/99945
摘要： Computer systems and methods allow users to annotate content items found in a corpus such as the World Wide Web Annotations, which can include any descriptive and/or evaluative metadata related to a document, are collected from a user and stored in association with that user. Users are able to annotate and view their annotations for any document they encounter while interacting with the corpus, including hits returned in a search of the corpus. Users are also able to search their annotations or to limit searches to documents they have annotated. Metadata from annotations can also be aggregated across users and aggregated metadata applied in generating search results.
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公开(公告)号：US20160324222A1
公开(公告)日：2016-11-10
申请号：US15065544
申请日：2016-03-09
申请人： Beverly Ann Deal , Rebecca Harmon , Kevin Lee
发明人： Beverly Ann Deal , Rebecca Harmon , Kevin Lee
CPC分类号： A41C3/065 , A41C3/0007 , A41C5/005
摘要： A bra comprised of separate left and right breast support members where each breast support member comprises a section of flexible sheet material formed to define a concave cavity and having tabs projecting radially outwardly from the cavity rim. Each breast support member defines a rear facing surface encompassing the cavity and tabs, which carries a pressure sensitive adhesive for adhering to a user's skin. The concave cavity constitutes a cup for accommodating the user's breast while the tabs enable the user to readily manipulate the support member for optimally positioning the user's breast relative to the cut of a deep plunge garment.
摘要翻译： 一种由单独的左和右乳房支撑构件组成的胸罩，其中每个乳房支撑构件包括形成为限定凹腔的柔性片材的一部分，并且具有从腔缘径向向外突出的突出部。 每个乳房支撑构件限定包围空腔和突出部的后向表面，该表面携带用于粘附到使用者皮肤的压敏粘合剂。 凹腔构成用于容纳使用者的乳房的杯子，而翼片使得使用者能够容易地操纵支撑构件，以便相对于深穿衣服的切口最佳地定位使用者的乳房。
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