公开(公告)号：US09637006B2

公开(公告)日：2017-05-02

申请号：US14447824

申请日：2014-07-31

Applicant: CATERPILLAR INC.

Inventor： Robert W. Lindsey ,  Donald John Gilmore

IPC: B60L1/00 ,  B60L3/00 ,  H02G3/00 ,  B60L11/08 ,  B60L11/12 ,  B60L11/18 ,  B60L15/02 ,  B60W20/00

CPC classification number: B60L11/08 ,  B60L1/00 ,  B60L11/12 ,  B60L11/1811 ,  B60L15/025 ,  B60L2200/40 ,  B60L2210/00 ,  B60L2240/527 ,  B60W20/00 ,  Y02T10/643 ,  Y02T10/7005 ,  Y02T10/7072 ,  Y02T10/7077 ,  Y02T90/127 ,  Y02T90/14

Abstract: An electrical system architecture for a mobile, electric hybrid machine includes a first bus configured to receive electric power at a first, selectively adjustable voltage from an electrical power source. A second bus is configured to receive electric power at a second voltage that is lower than the first voltage. A controller is configured to determine a desired magnitude of the second voltage for the second bus, produce a signal indicative of a magnitude of the first, selectively adjustable voltage that is a multiple of the desired magnitude of the second voltage, and adjust the magnitude of the first voltage in the first bus to the multiple of the desired magnitude of the second voltage. A fixed-ratio power converter is configured to convert the power at the first voltage in the first bus to the power at the second voltage in the second bus.

公开(公告)号：US09065270B2

公开(公告)日：2015-06-23

申请号：US13777265

申请日：2013-02-26

Applicant: Caterpillar Inc.

Inventor： Lewei Qian ,  Jason John Smolarchuk ,  Donald John Gilmore

IPC: H02H1/00 ,  H02H3/16

CPC classification number: H02H1/0092 ,  H02H3/16

Abstract: A ground fault protection system may include a controller that is configured to receive signals representing a ground fault detection voltage and a DC link voltage of the machine. Based on the ground fault detection voltage and the DC link voltage, the controller may determine a ground fault detection percentage value, and a worst case component insulation voltage. The controller may compare an absolute value of the worst case component insulation voltage with a rated insulation voltage of a component of the machine. When the absolute value of the worst case component insulation voltage is higher than the rated insulation voltage, the controller may determine a new DC link voltage based on the rated insulation voltage and the ground fault detection percentage value, and may operate the machine by using the new DC link voltage.

Abstract translation: 接地故障保护系统可以包括被配置为接收表示机器的接地故障检测电压和DC链路电压的信号的控制器。 基于接地故障检测电压和直流母线电压，控制器可以确定接地故障检测百分比值和最坏情况下的部件绝缘电压。 控制器可将最差情况下的部件绝缘电压的绝对值与机器部件的额定绝缘电压进行比较。 当最坏情况分量绝缘电压的绝对值高于额定绝缘电压时，控制器可以根据额定绝缘电压和接地故障检测百分比值确定新的直流母线电压，并可以使用 新的直流母线电压。