Transformer-less, tapped point AC voltage splitter for full bridge DC AC inverters

    公开(公告)号:US11012001B2

    公开(公告)日:2021-05-18

    申请号:US16751698

    申请日:2020-01-24

    IPC分类号: H02M7/5387 H02M7/487

    摘要: A DC AC inverter system includes a full bridge DC AC inverter, a first module with a first capacitance connected to a positive DC input and an intermediate output, and a second module with a second capacitance connected to a negative DC input and to the intermediate output, wherein the first and second capacitance is greater than PΔA/(VΔ*Vnom*2πf); (a) PΔ is a predetermined power imbalance between a first output and the intermediate output and a second output and the intermediate output; (b) Vnom is a predetermined nominal output voltage between the first output and the intermediate output (V1) and the second output and the intermediate output (V2); (c) VΔ is a predetermined fraction of voltage difference, relative to Vnom, between V1 and V2 when there is a power imbalance PΔ; and (d) f is a frequency of V1 or V2.

    Bidirectional DC DC Converter for Renewable Energy Storage

    公开(公告)号:US20190280605A1

    公开(公告)日:2019-09-12

    申请号:US16297619

    申请日:2019-03-09

    IPC分类号: H02M3/335 H02J3/38 H02J3/32

    摘要: This disclosure describes a unique bidirectional DC DC converter that transfers power between a high voltage source, such as the DC voltage in a solar PV array, a low voltage energy storage element such as a battery pack, and an inverter that is controlling the operating voltage of the solar PV array. Its novelty is that it is transparent to the inverter's control mechanism and is perceived as a source equivalent to the existing solar PV. By controlling the charge and discharge times of the energy storage element, the solar power that is harvested during the sun hour day can be metered back to the inverter at more optimal times, either for self consumption or to take advantage of higher rates of power sold to a connected utility. The bidirectional DC DC converter is unique in its operation in that it utilizes synchronous rectification when down-converting higher voltages to lower voltages and in that it uses high speed Silicon Carbide, or Gallium Nitride devices necessary for such rectification. Another unique aspect is the variable overlapping of the drive signal of the switches in the boost (second) stage of the converter which allows for a continuous range of voltage levels of the transferred power from energy storage element to the primary stage and output.

    Straw spreader for a combine harvester and method of spreading
    7.
    发明授权
    Straw spreader for a combine harvester and method of spreading 失效
    联合收割机的撒布机和传播方法

    公开(公告)号:US5021030A

    公开(公告)日:1991-06-04

    申请号:US487261

    申请日:1990-03-02

    IPC分类号: A01D41/12

    CPC分类号: A01D41/1243

    摘要: A straw spreader for the rear straw discharge of a combine comprises a frame mounted on ground wheels together with a pair of hitch arms which extend forwardly from the frame on either side of the rear portion of the combine for attachment to the combine frame structure. The separate frame can thus move up and down relative to the rear of the combine and maintains a pair of spreader spinners on the frame at a predetermined height relative to the ground. Guide surfaces collect the material from the chopper at the rear of the combine and direct it onto the spinners for a spreading action. The low height of the spreading action reduces dust emission and enhances spreading consistency. An accumulator can be provided between the spreader and the discharge in the rear of the combine to allow the amount of straw spread to be varied relative to the amount collected at any particular point on the field.

    摘要翻译: 用于组合的后吸管排放的吸管撒布机包括安装在地面轮上的框架以及从组合件的后部两侧的框架向前延伸的一对搭接臂,用于附接到组合框架结构。 单独的框架因此可以相对于组合件的后部上下移动,并且在框架上相对于地面以预定的高度维持一对展开器旋转器。 导向表面从组合后部的切碎机收集材料,并将其引导到旋转器上进行扩展。 扩散作用的低高度减少了粉尘的排放并增强了散布的一致性。 可以在撒布机和组合物后部的排出口之间提供蓄能器,以使秸秆的量相对于场上任何特定点收集的量而变化。

    Bug killing system
    8.
    发明授权
    Bug killing system 失效
    杀虫系统

    公开(公告)号:US06817139B1

    公开(公告)日:2004-11-16

    申请号:US10341285

    申请日:2003-01-13

    IPC分类号: A01M108

    CPC分类号: A01M1/08 A01M2200/012

    摘要: A first housing has an open end and a sidewall with at least one slot. A second housing has an open first end in operative association with the open end of the first housing. The second housing has an open second end. A fan assembly is secured between the first and second housings to effect a flow of air through the slot and open second end of the second housing. A mesh fabric entraps insects entrained against the fabric by the flow of air through the fabric. A source of light within the first housing attracts flying insects toward the slot and into the first housing. Once in the first housing the flow of air from the fan will entrain the flying insects in a path of movement from the first housing to the second housing and then to the fabric.

    摘要翻译: 第一壳体具有开口端和具有至少一个槽的侧壁。 第二壳体具有与第一壳体的开口端可操作地关联的敞开的第一端。 第二个住房有一个开放的第二个住所。 风扇组件被固定在第一和第二壳体之间以实现空气流过狭槽并打开第二壳体的第二端。 网状织物通过空气流过织物而夹带在织物上的昆虫。 第一壳体内的光源吸引飞翔的昆虫朝向狭槽进入第一壳体。 一旦在第一壳体中,来自风扇的空气流将将飞行昆虫从第一壳体移动到第二壳体,然后到达织物。

    Bean harvester
    10.
    发明授权
    Bean harvester 失效
    豆收割机

    公开(公告)号:US5809759A

    公开(公告)日:1998-09-22

    申请号:US750380

    申请日:1997-02-18

    摘要: A crop harvester has bristle guards (39) mounted on the cutter bar (14) as crop lifters and to capture fruit lost by dehiscence during cutting. Each bristle guard is a set of laterally oriented bristles (44). Dehisced fruit is swept into the header by a pickup reel (16) having bristle bats (74). The bristles (76) are supported on the leading side by a strip (78) of flexible belting. The belting protects the bristle against being cut by the cutter bar. The crops are supported against being pushed forward by the bristle bats (74) of the reel. The diameter is reduced to about one-half normal and the reel index in increased to provide an aggressive reel operation, ensuring that plants are properly engaged in the bristle guards for cutting.

    摘要翻译: PCT No.PCT / CA95 / 00324 Sec。 371日期1997年2月18日 102(e)日期1997年2月18日PCT提交1995年6月1日PCT公布。 WO95 / 33365 PCT公开号 日期1995年12月14日作物收割机具有作为作物升降器安装在切割杆(14)上的刷毛护罩(39),并捕获在切割期间由开裂损失的水果。 每个刷毛防护罩是一组横向定向的刷毛(44)。 旋开的水果被具有刷毛蝙蝠(74)的拾取卷轴(16)扫入头部。 刷毛(76)由柔性带的带(78)支撑在前侧。 皮带保护刷毛不被切割杆切割。 作物被支撑以被卷轴的刷毛蝙蝠(74)向前推动。 直径减小到大约一半正常,并且卷轴索引增加以提供积极的卷轴操作,确保植物适当地接合在刷毛防护件中用于切割。