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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
Applicant: Eaton Corporation
Inventor： Xiaoyuan Hong , Hao Luo , Kevin Lee
IPC: H02P1/52
Abstract: 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.
Abstract translation: 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
Applicant: Eaton Corporation
Inventor： Xiaoyuan Hong , Hao Luo , Kevin Lee
Abstract: 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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公开(公告)号：US20170257041A1
公开(公告)日：2017-09-07
申请号：US15506785
申请日：2015-08-25
Applicant: Kevin LEE , Kai WANG , Wenxi YAO , Eaton Corporation
CPC classification number: H02K17/02 , H02P1/28 , H02P1/30 , H02P23/0031 , H02P27/047 , H02P2103/10
Abstract: 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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Patent Agency Ranking
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
Applicant: EATON CORPORATION
CPC classification number: H02P27/047 , H02P21/05 , H02P23/04
Abstract: 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.
Abstract translation: 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
Applicant: Eaton Corporation , Zhejiang University
Abstract: 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
Applicant: Eaton Corporation
Abstract: 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
Applicant: Eaton Corporation
Inventor： Kevin Lee , Robert A. Fenton , Xiaoling Li , Leo Sun , Jiankun Xin
CPC classification number: H02P29/032 , H02P27/08 , H02P29/02 , H02P29/60
Abstract: 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
Applicant: EATON CORPORATION
CPC classification number: H01F27/2828 , H01F3/14 , H01F27/306 , H01F27/324 , H01F27/33 , H01F2017/046
Abstract: 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.
Abstract translation: 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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