公开(公告)号：US09470739B2

公开(公告)日：2016-10-18

申请号：US14077654

申请日：2013-11-12

Applicant: FORD GLOBAL TECHNOLOGIES, LLC

Inventor： Arvind Govindaraj ,  Guangyin Lei ,  Mansur A. Blackman ,  Chingchi Chen

IPC: G01R31/02 ,  B60L11/02 ,  G01R27/26 ,  B60L3/00

CPC classification number: G01R31/028 ,  B60L3/003 ,  B60L11/02 ,  B60L2240/526 ,  B60L2240/527 ,  B60L2240/529 ,  G01R27/2605 ,  Y02T10/70 ,  Y02T10/7077

Abstract: In order to detect deterioration of a DC link capacitor between a DC source and an inverter load in an electric propulsion vehicle, capacitance of the link capacitor must be accurately measured during in-service use. A charge is established on the link capacitor. The capacitor is isolated from the source and the inverter load. A constant current circuit is activated to discharge the capacitor. A first voltage is measured across the capacitor at a first time during the discharging. A second voltage is measured across the capacitor at a second time during the discharging. A discharge current flowing from the capacitor is measured during the discharging. The capacitance is calculated in response to the discharge current multiplied by a ratio of a difference between the second and first times to a difference between the first and second voltages. The calculated capacitance is monitored for a decline indicative of a failure.

Abstract translation: 为了检测电力推进车辆的直流电源和逆变器负载之间的直流母线电容器的劣化，必须在使用中准确测量连接电容器的电容。 链路电容器上建立一个电荷。 电容与源极和逆变器负载隔离。 恒流电路被激活以放电电容器。 在放电期间第一次在电容器两端测量第一电压。 在放电期间第二次在电容器两端测量第二电压。 在放电期间测量从电容器流出的放电电流。 电容根据放电电流乘以第二和第一时间之间的差与第一和第二电压之间的差的比来计算。 监测计算出的电容是否显示故障的下降。

公开(公告)号：US10277129B2

公开(公告)日：2019-04-30

申请号：US15825638

申请日：2017-11-29

Applicant: FORD GLOBAL TECHNOLOGIES, LLC

Inventor： Arvind Govindaraj ,  Jun Kikuchi

IPC: H02M3/158 ,  B60L3/00 ,  B60L7/14 ,  B60L11/12 ,  B60L11/14 ,  B60L15/20 ,  H02M1/32 ,  H02M5/458 ,  H02M1/38

Abstract: A method includes controlling a power supply system to avoid an over-voltage event across one or more switching devices of the power supply system. The controlling is based on switching overlap information that includes instructions for either advancing or retarding a switching signal associated with at least one of the switching devices.

公开(公告)号：US09853544B2

公开(公告)日：2017-12-26

申请号：US14088687

申请日：2013-11-25

Applicant: Ford Global Technologies, LLC

Inventor： Arvind Govindaraj ,  Jun Kikuchi

IPC: H02M3/158 ,  B60L3/00 ,  B60L7/14 ,  B60L11/12 ,  B60L11/14 ,  B60L15/20 ,  H02M1/32 ,  H02M5/458 ,  H02M1/38

CPC classification number: H02M3/158 ,  B60L3/003 ,  B60L7/14 ,  B60L11/123 ,  B60L11/14 ,  B60L15/2009 ,  B60L15/2054 ,  B60L2210/10 ,  B60L2210/40 ,  B60L2240/12 ,  B60L2240/421 ,  B60L2240/423 ,  B60L2240/441 ,  B60L2240/443 ,  B60L2240/486 ,  H02M1/32 ,  H02M1/38 ,  H02M5/4585 ,  Y02T10/6217 ,  Y02T10/645 ,  Y02T10/7005 ,  Y02T10/7077 ,  Y02T10/7216 ,  Y02T10/7241 ,  Y02T10/7275

Abstract: A method according to an exemplary aspect of the present disclosure includes, among other things, controlling a power supply system to avoid an over-voltage event across one or more switching devices of the power supply system, the controlling step based on switching overlap information that includes instructions for either advancing or retarding a switching signal associated with at least one of the switching devices.

公开(公告)号：US20150130273A1

公开(公告)日：2015-05-14

申请号：US14077654

申请日：2013-11-12

Applicant: FORD GLOBAL TECHNOLOGIES, LLC

Inventor： Arvind Govindaraj ,  Guangyin Lei ,  Mansur A. Blackman ,  Chingchi Chen

IPC: G01R31/02 ,  B60L11/02 ,  G01R27/26

CPC classification number: G01R31/028 ,  B60L3/003 ,  B60L11/02 ,  B60L2240/526 ,  B60L2240/527 ,  B60L2240/529 ,  G01R27/2605 ,  Y02T10/70 ,  Y02T10/7077

Abstract: In order to detect deterioration of a DC link capacitor between a DC source and an inverter load in an electric propulsion vehicle, capacitance of the link capacitor must be accurately measured during in-service use. A charge is established on the link capacitor. The capacitor is isolated from the source and the inverter load. A constant current circuit is activated to discharge the capacitor. A first voltage is measured across the capacitor at a first time during the discharging. A second voltage is measured across the capacitor at a second time during the discharging. A discharge current flowing from the capacitor is measured during the discharging. The capacitance is calculated in response to the discharge current multiplied by a ratio of a difference between the second and first times to a difference between the first and second voltages. The calculated capacitance is monitored for a decline indicative of a failure.

Abstract translation: 为了检测电力推进车辆的直流电源和逆变器负载之间的直流母线电容器的劣化，必须在使用中准确测量连接电容器的电容。 链路电容器上建立一个电荷。 电容器与源极和逆变器负载隔离。 恒流电路被激活以放电电容器。 在放电期间第一次在电容器两端测量第一电压。 在放电期间第二次在电容器两端测量第二电压。 在放电期间测量从电容器流出的放电电流。 电容根据放电电流乘以第二和第一时间之间的差与第一和第二电压之间的差的比来计算。 监测计算出的电容是否显示故障的下降。