System and method for starting a variable frequency drive with reduced arc flash risk

    公开(公告)号:US09680388B2

    公开(公告)日:2017-06-13

    申请号:US14870269

    申请日:2015-09-30

    CPC classification number: H02M5/42 H02H11/005 H02M1/32 H02M5/45

    Abstract: In one embodiment, a variable frequency drive system includes a main contactor, a variable frequency drive, a charging module structured to generate a magnetizing AC voltage, wherein the charging module is structured to selectively provide the magnetizing AC voltage to a transformer of the variable frequency drive, and a sensing and control circuit having a number of sensors operably associated with the variable frequency drive. The sensing and control circuit is structured to detect a short circuit condition in the variable frequency drive when the magnetizing AC voltage is provided to the transformer based on an output of at least one of the number of sensors, and responsive thereto prevent the main contactor from being closed and thereby prevent the main AC voltage from being provided to the transformer.

    Closed-transition variable-frequency drive apparatus and methods

    公开(公告)号:US10033322B2

    公开(公告)日:2018-07-24

    申请号:US15057568

    申请日:2016-03-01

    Abstract: A system includes a variable frequency drive (VFD) comprising an inverter having an output configured to be coupled to a motor and a switch configured to couple a power source to the motor to bypass the VFD. The system further includes a control circuit configured to synchronize the VFD to the power source, to operate the switch to couple the power source and the VFD in parallel and to subsequently disable the inverter responsive to a current of the inverter. In some embodiments, a PWM frequency of the VFD may be temporarily increased when transferring the motor from the power source to the VFD.

    System and method for magnetizing a transformer in an electrical system prior to energizing the electrical system
    4.
    发明授权
    System and method for magnetizing a transformer in an electrical system prior to energizing the electrical system 有权
    在对电气系统通电之前,用于在电气系统中磁化变压器的系统和方法

    公开(公告)号:US09337762B1

    公开(公告)日:2016-05-10

    申请号:US14570377

    申请日:2014-12-15

    Abstract: An electrical system includes a transformer structured to be selectively coupled to an AC source that provides a main AC voltage, the transformer having a number of sets of primary windings and a number of sets of secondary windings, and a charging module structured to generate a magnetizing AC voltage. The charging module is structured to selectively provide the magnetizing AC voltage to: (i) one of the number of sets primary windings, or (ii) one of the number of sets secondary windings. The magnetizing AC voltage is such that responsive to the magnetizing AC voltage being provided to one of the number of sets of primary windings or one of the number of sets of secondary windings, one or more of the number of sets of primary windings will be magnetized in a manner wherein a flux of the one or more of the number of primary windings is in phase with the main AC voltage provided from the AC source.

    Abstract translation: 电气系统包括被构造成选择性地耦合到提供主交流电压的交流电源的变压器,所述变压器具有多组初级绕组和多个次级绕组,以及充电模块,其被构造成产生磁化 交流电压。 充电模块被构造成选择性地提供磁化AC电压以:(i)初级绕组的组数之一,或(ii)次级绕组的数量之一。 磁化AC电压使得响应于磁化AC电压被提供给多个初级绕组组中的一个或多个次级绕组组中的一个,一组或多组次级绕组将被磁化 以这种方式,其中一个或多个初级绕组中的一个或多个与从AC源提供的主AC电压同相。

    POWER POLE ISOLATED HEAT PIPE INVERTER ASSEMBLY
    5.
    发明申请
    POWER POLE ISOLATED HEAT PIPE INVERTER ASSEMBLY 有权
    电源隔离热管逆变器总成

    公开(公告)号:US20140268570A1

    公开(公告)日:2014-09-18

    申请号:US14226860

    申请日:2014-03-27

    Abstract: A power pole inverter is provided. The power pole inverter includes a housing assembly, a capacitor assembly, a number of arm assemblies, a number of heat sinks, and a support assembly. The housing assembly includes a number of sidewalk. The housing assembly sidewalls defining an enclosed space. The capacitor assembly is coupled to the housing assembly. Each arm assembly includes a plurality of electrical components and a number of electrical buses. Each the electrical bus includes a body with terminals, each the terminal structured to be coupled to, and in electrical communication with, the capacitor assembly, each arm assembly including a neutral terminal. Each arm assembly is coupled to, and in electrical communication with, the capacitor assembly. The support assembly includes a non-conductive frame assembly. The support assembly is structured to support each the heat sink in isolation.

    Abstract translation: 提供电源反相器。 电源反相器包括壳体组件,电容器组件,多个臂组件,多个散热器和支撑组件。 壳体组件包括多个人行道。 壳体组件侧壁限定封闭空间。 电容器组件联接到壳体组件。 每个臂组件包括多个电气部件和多个电气总线。 每个电总线包括具有端子的主体,每个端子构造成耦合到电容器组件并与电容器组件电连通,每个臂组件包括中性端子。 每个臂组件耦合到电容器组件并与电容器组件电连通。 支撑组件包括非导电框架组件。 支撑组件被构造成隔离地支撑每个散热器。

    Fuse arc gas baffle with arc resistant fuse assembly

    公开(公告)号:US09805898B2

    公开(公告)日:2017-10-31

    申请号:US15181763

    申请日:2016-06-14

    CPC classification number: H01H85/38 H01H85/43

    Abstract: A protection system for an electrical apparatus is disclosed. The protection system includes a baffle assembly and a coating for electrical elements exposed to arc gasses. The baffle assembly includes a number of generally planar sidewalls, each sidewall including a first edge surface, a second edge surface, and a third edge surface. The sidewalls are disposed in a spaced, generally parallel configuration defining a number of channels. A first end wall, is sealingly coupled to each sidewall first edge. A second end wall is sealingly coupled to each sidewall second edge. A third end wall is sealingly coupled to each sidewall third edge. The terminals of an electrical apparatus are disposed in an aligned set with one set of terminals in each channel. The channels are structured to limit the flow of arc gasses across adjacent sets of terminals.

    FUSE ARC GAS BAFFLE WITH ARC RESISTANT FUSE ASSEMBLY
    7.
    发明申请
    FUSE ARC GAS BAFFLE WITH ARC RESISTANT FUSE ASSEMBLY 有权
    带防弧保险丝组件的保险丝气罐

    公开(公告)号:US20170032920A1

    公开(公告)日:2017-02-02

    申请号:US15181763

    申请日:2016-06-14

    CPC classification number: H01H85/38 H01H85/43

    Abstract: A protection system for an electrical apparatus is disclosed. The protection system includes a baffle assembly and a coating for electrical elements exposed to arc gasses. The baffle assembly includes a number of generally planar sidewalls, each sidewall including a first edge surface, a second edge surface, and a third edge surface. The sidewalls are disposed in a spaced, generally parallel configuration defining a number of channels. A first end wall, is sealingly coupled to each sidewall first edge. A second end wall is sealingly coupled to each sidewall second edge. A third end wall is sealingly coupled to each sidewall third edge. The terminals of an electrical apparatus are disposed in an aligned set with one set of terminals in each channel. The channels are structured to limit the flow of arc gasses across adjacent sets of terminals.

    Abstract translation: 公开了一种用于电气设备的保护系统。 保护系统包括挡板组件和暴露于电弧气体的电气元件的涂层。 挡板组件包括多个大致平坦的侧壁,每个侧壁包括第一边缘表面,第二边缘表面和第三边缘表面。 侧壁以限定多个通道的间隔开的大致平行构造设置。 第一端壁密封地联接到每个侧壁第一边缘。 第二端壁密封地联接到每个侧壁第二边缘。 第三端壁密封地连接到每个侧壁第三边缘。 电气设备的端子设置在每个通道中具有一组端子的对准组中。 这些通道被构造成限制相邻的端子组之间的电弧气体的流动。

    Methods and apparatus for soft operation of transformers using auxiliary winding excitation

    公开(公告)号:US10135372B2

    公开(公告)日:2018-11-20

    申请号:US15421819

    申请日:2017-02-01

    Abstract: An apparatus includes a magnetizing circuit configured to be coupled to a transformer and to selectively provide a magnetizing current to the transformer and a control circuit configured to cause the magnetizing circuit to provide the magnetizing current following disconnection of the primary winding of the transformer from the power source. The magnetizing circuit may be configured to provide the magnetizing current from a first source following disconnection of the primary winding from a second source. The transformer may include a first transformer and the apparatus may further include a second, higher impedance transformer coupled between the second source and the first transformer. In further embodiments, the magnetizing circuit may include a solid-state converter.

    FUSE ARC GAS BAFFLE WITH ARC RESISTANT FUSE ASSEMBLY

    公开(公告)号:US20180019086A1

    公开(公告)日:2018-01-18

    申请号:US15715229

    申请日:2017-09-26

    CPC classification number: H01H85/38 H01H85/43

    Abstract: A protection system for an electrical apparatus is disclosed. The protection system includes a baffle assembly and a coating for electrical elements exposed to arc gases. The baffle assembly includes a number of generally planar sidewalls, each sidewall including a first edge surface, a second edge surface, and a third edge surface. The sidewalls are disposed in a spaced, generally parallel configuration defining a number of channels. A first end wall is sealingly coupled to each sidewall first edge. A second end wall is sealingly coupled to each sidewall second edge. A third end wall is sealingly coupled to each sidewall third edge. The terminals of an electrical apparatus are disposed in an aligned set with one set of terminals in each channel. The channels are structured to limit the flow of arc gases across adjacent sets of terminals.

    Power pole isolated heat pipe inverter assembly
    10.
    发明授权
    Power pole isolated heat pipe inverter assembly 有权
    电源极隔离式热管逆变器总成

    公开(公告)号:US09241430B2

    公开(公告)日:2016-01-19

    申请号:US14226860

    申请日:2014-03-27

    Abstract: A power pole inverter is provided. The power pole inverter includes a housing assembly, a capacitor assembly, a number of arm assemblies, a number of heat sinks, and a support assembly. The housing assembly includes a number of sidewalk. The housing assembly sidewalls defining an enclosed space. The capacitor assembly is coupled to the housing assembly. Each arm assembly includes a plurality of electrical components and a number of electrical buses. Each the electrical bus includes a body with terminals, each the terminal structured to be coupled to, and in electrical communication with, the capacitor assembly, each arm assembly including a neutral terminal. Each arm assembly is coupled to, and in electrical communication with, the capacitor assembly. The support assembly includes a non-conductive frame assembly. The support assembly is structured to support each the heat sink in isolation.

    Abstract translation: 提供电源反相器。 电源反相器包括壳体组件,电容器组件,多个臂组件,多个散热器和支撑组件。 壳体组件包括多个人行道。 壳体组件侧壁限定封闭空间。 电容器组件联接到壳体组件。 每个臂组件包括多个电气部件和多个电气总线。 每个电总线包括具有端子的主体,每个端子构造成耦合到电容器组件并与电容器组件电连通,每个臂组件包括中性端子。 每个臂组件耦合到电容器组件并与电容器组件电连通。 支撑组件包括非导电框架组件。 支撑组件被构造成隔离地支撑每个散热器。

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