PITCH CONTROL METHOD AND SYSTEM OF SYMMETRICAL-AIRFOIL VERTICAL AXIS WIND TURBINE

    公开(公告)号:US20210372372A1

    公开(公告)日:2021-12-02

    申请号:US17334260

    申请日:2021-05-28

    Abstract: A pitch control method and system of a symmetrical-airfoil vertical axis wind turbine is provided, which collects data by an anemometer, an anemoscope and an angle sensor, outputs an optimum pitch angle based on a control law of a pitch angle, and controls the pitch angle to be the optimum pitch angle through a pitch control actuator. In addition to input variables of the control law such as a wind velocity vin and a blade azimuth angle Ψ, constants such as a rotation radius R, a rotation velocity Ω of the blade and aerodynamic coefficients c1, c2 and c3 are also related. A Reynolds number has little influence on three aerodynamic coefficients c1, c2 and c3. The pitch actuator controls the adjustment rods to realize the automatic pitch control of the blades. An expression of the control law of the pitch is concise, the calculation time is short and a response speed is fast.

    OVERHEAD MONORAIL DRIVING UNIT GROUP REALIZING MECHANICAL FAST POWER DISTRIBUTION

    公开(公告)号:US20210331716A1

    公开(公告)日:2021-10-28

    申请号:US17369450

    申请日:2021-07-07

    Abstract: The present invention relates to the field of coal mine underground auxiliary transportation equipment, and particularly relates to an overhead monorail driving unit group realizing mechanical fast power distribution. The overhead monorail driving unit group realizing mechanical fast power distribution includes a rail, wherein the rail is connected with driving portions, carrying trolleys and a hoisting beam, the hoisting beam is disposed in a middle position of the driving portions and the carrying trolleys, and the driving portions, the carrying trolleys and the hoisting beam are connected through driving portion short pull rods, frame-shaped pull rods and driving portion long pull rods. Overhead monorail driving portions have four paths for transmitting a driving force to the hoisting beam, the frame-shaped pull rods directly transmit the driving force of the driving portions in positions far away from the hoisting beam to the hoisting beam, the objective is to reduce an accumulated peak value of the driving force of the driving portion in a mode of serial-parallel arrangement of the overhead monorail dtiving portions, the problem of horizontal direction bending failure of the rail caused by the driving portions in an operation process of an overhead monorail is solved, and the reliability and adaptability of overhead monorail transportation equipment are improved.

    Three-DOF hybrid damping pantograph
    66.
    发明授权
    Three-DOF hybrid damping pantograph 有权
    三自由度混合阻尼集电弓

    公开(公告)号:US09539905B2

    公开(公告)日:2017-01-10

    申请号:US14890156

    申请日:2015-05-28

    CPC classification number: B60L5/18 B60L5/22 B61C3/00

    Abstract: The invention discloses a three-DOF hybrid damping pantograph, comprising an electric driving transmission system fixed on a base, and collector heads, transverse dampers, parallel support frames as well as longitudinal dampers. Square auxiliary holes are arranged on the base, supporting insulators are arranged on four angles below the base; four transverse dampers are symmetrically fixed on the base, and arranged on the outside of the parallel support frames and connected with the parallel support frames through hinges; four longitudinal dampers are symmetrically fixed on the top of the parallel support frames; the collector heads are connected with the parallel support frames by the longitudinal dampers and separators are arranged on the collector heads. The invention can realize bearing and damping spatially in three directions, avoid pantograph detachment, catenary scraping and other safety accidents, and improve the structural stability of the pantograph and adaptability to the catenary.

    Abstract translation: 本发明公开了一种三自由度混合阻尼集电弓,其包括固定在基座上的电驱动传动系统以及收集器头,横向阻尼器,平行支撑框架以及纵向阻尼器。 方形辅助孔布置在基座上,支撑绝缘子在基座下方四个角度排列; 四个横向阻尼器对称地固定在基座上,并且布置在平行支撑框架的外侧上,并通过铰链与平行的支撑框架连接; 四个纵向阻尼器对称地固定在平行支撑框架的顶部上; 收集头通过纵向阻尼器与平行的支撑框架连接,分离器设置在收集器头上。 本发明可以在三个方向空间实现轴承和阻尼,避免受电弓脱落,悬链线等安全事故,提高受电弓的结构稳定性和适应性。

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