公开(公告)号：US10090764B1

公开(公告)日：2018-10-02

申请号：US15867276

申请日：2018-01-10

申请人： National Technology & Engineering Solutions of Sandia, LLC ,  Wayne W. Weaver ,  Rush D. Robinett, III ,  Ronald Matthews

发明人： David G. Wilson ,  Wayne W. Weaver ,  Rush D. Robinett, III ,  Ronald Matthews ,  Steven F. Glover

IPC分类号： H02M3/158 ,  G05F3/08 ,  H02J1/00 ,  H02J1/02 ,  H02M1/02

摘要： A Hamiltonian surface shaping power flow control (HSSPFC) method is used to analyze the meta-stability and adjust pulsed power loads on a DC electric power distribution network. Pulsed power loads are nonlinear, time-variant systems that cause nonlinear limit-cycles. During the on periods of a pulsed load, the system can be in an unstable state and is damped back to stability during the off state of the load. Therefore, over the entire period of the pulse the system may only be assessed as meta-stable. As shown through simulation, HIL and hardware results, the HSSPFC method is more accurate than the other small-signal approaches, such as Eigenvalues, Nyquist, and Floquet theory, and can reveal important details about the transient responses and performance.

公开(公告)号：US4696375A

公开(公告)日：1987-09-29

申请号：US874581

申请日：1986-06-16

申请人： Ronald Matthews ,  John J. Jecmen

发明人： Ronald Matthews ,  John J. Jecmen

IPC分类号： B66B13/06 ,  B66B13/26 ,  E05D13/00 ,  B66B13/00

CPC分类号： B66B13/26 ,  B66B13/06 ,  E05D13/006 ,  E05Y2900/104 ,  E05Y2900/106

摘要： A chain break safety device for vertically moving, bi-parting, counter-balanced elevator doors which comprises a block having a vertical lead disposed tapered opening, said block having limited vertical moveability with respect to the door, a braking member positioned within the tapered opening, a cage for maintaining the braking member in the tapered opening, and a resilient member adapted to deflect under the tension of the counter-balance system and move said block into a non-braking position and to cause the block to move into a braking position upon failure of the counter-balance system, thus pinching the braking member between the tapered surface and a static vertical member of the elevator door system.

摘要翻译： 一种用于垂直移动，双分离，平衡平衡的电梯门的链条断裂安全装置，其包括具有设置成锥形开口的垂直引线的块，所述块相对于门具有有限的垂直移动性;定位在锥形开口内的制动构件 ，用于将制动构件保持在锥形开口中的保持架，以及弹性构件，其适于在平衡系统的张力下偏转并将所述块移动到非制动位置并使块移动到制动位置 在平衡系统故障时，因此将制动构件夹在锥形表面与电梯门系统的静态垂直构件之间。