公开(公告)号：US08970291B1

公开(公告)日：2015-03-03

申请号：US14101408

申请日：2013-12-10

Applicant: Caterpillar Inc.

Inventor： Jesse R Gerdes ,  Jackson Wai ,  Benjamin Paul Gottemoller ,  Sangameshwar Sonth

IPC: H03L9/00 ,  H03K17/16 ,  H03K5/1252

CPC classification number: H03K5/1252

Abstract: A method of debouncing a variable frequency step signal is provided. The method includes the steps of: (a) determining a first period in oscillations of the variable frequency step signal and applying a first debounce time to debounce oscillations in the variable frequency step signal, (b) detecting a second period in the oscillations of the variable frequency step signal, (c) calculating a second debounce time as a fraction of the first period, (d) applying the second debounce time to debounce oscillations having the second period, and (e) repeating the steps (b)-(d) for debouncing successive oscillations of varying periods in the variable frequency step signal.

Abstract translation: 提供了一种去抖动可变频率步进信号的方法。 该方法包括以下步骤：（a）确定可变频率步进信号的振荡中的第一周期，并施加第一去抖动时间以使可变频率步长信号中的振荡去抖动，（b）检测第二周期的振荡， （c）计算作为第一周期的一部分的第二去抖动时间，（d）应用第二去抖时间去抖动具有第二周期的振荡，以及（e）重复步骤（b） - （d ）用于在可变频率步长信号中去抖动不同周期的连续振荡。

公开(公告)号：US20230121559A1

公开(公告)日：2023-04-20

申请号：US17502819

申请日：2021-10-15

Applicant: Caterpillar Inc.

Inventor： Dachuan Yu ,  Gregory J Speckhart ,  Jesse R Gerdes

IPC: G01R31/62 ,  H02H1/00 ,  H02H7/04

Abstract: An example transformer includes a controller that determines the currents on a power grid side of the transformer, as well as an inverter/load side of the transformer. The transformer may be of a delta-wye configuration. The controller compares the currents on the delta side of the transformer to the currents on the wye side of the transformer to determine whether the currents on either side are imbalanced. If the currents on the delta side are balanced, while the currents on the wye side are imbalanced, then the controller may determine that an open phase condition exists on the wye side of the transformer. Alternatively, if the currents on the delta side are imbalanced or if the currents on the delta side are balanced and the currents on the wye side are also balanced, then the controller determines that no open phase condition exists.

公开(公告)号：US12066502B2

公开(公告)日：2024-08-20

申请号：US17502819

申请日：2021-10-15

Applicant: Caterpillar Inc.

Inventor： Dachuan Yu ,  Gregory J Speckhart ,  Jesse R Gerdes

IPC: G01R31/62 ,  H02H1/00 ,  H02H7/04

CPC classification number: G01R31/62 ,  H02H1/0007 ,  H02H7/04

Abstract: An example transformer includes a controller that determines the currents on a power grid side of the transformer, as well as an inverter/load side of the transformer. The transformer may be of a delta-wye configuration. The controller compares the currents on the delta side of the transformer to the currents on the wye side of the transformer to determine whether the currents on either side are imbalanced. If the currents on the delta side are balanced, while the currents on the wye side are imbalanced, then the controller may determine that an open phase condition exists on the wye side of the transformer. Alternatively, if the currents on the delta side are imbalanced or if the currents on the delta side are balanced and the currents on the wye side are also balanced, then the controller determines that no open phase condition exists.