公开(公告)号：US20160334280A1

公开(公告)日：2016-11-17

申请号：US14709782

申请日：2015-05-12

Applicant: GM Global Technology Operations LLC

Inventor： S.M. Nayeem Hasan ,  Bryan M. Ludwig ,  David P. Tasky

IPC: G01K7/01 ,  H01L27/06 ,  H01L29/739

CPC classification number: G01K7/01 ,  G01K7/427 ,  G01K2217/00 ,  H01L29/7397

Abstract: A number of variations may include a method which may include determining a temperature rise in an IGBT junction without the use of a temperature estimation or measurement device because determination may be made by first determining the power loss due to the conduction losses of the IGBT and power loss associated with switching the IGBT where these losses may be determined by utilizing the saturation voltage of the IGBT, IGBT PWM duty cycle, IGBT switching frequency, fundamental frequency along with a lookup table for the switching energies and the phase current going through the IGBT. The determined power loss may be multiplied by a measured, sensed or obtained thermal impedance from the IGBT junction. Finally, the determined temperature rise of the IGBT junction may be added to a measured, sensed or obtained temperature of the coolant in order to determine the absolute temperature of the IGBT junction.

Abstract translation: 许多变型可以包括一种方法，其可以包括在不使用温度估计或测量装置的情况下确定IGBT结中的温度升高，因为可以通过首先确定由于IGBT的导通损耗和功率而导致的功率损耗 通过利用IGBT的饱和电压，IGBT PWM占空比，IGBT开关频率，基波频率以及开关能量和通过IGBT的相电流的查找表可以确定这些损耗与IGBT的切换相关的损耗。 所确定的功率损耗可以乘以来自IGBT结的测量，感测或获得的热阻抗。 最后，为了确定IGBT结的绝对温度，可以将确定的IGBT结的温度上升加到测量的，感测的或获得的冷却剂温度上。

公开(公告)号：US11073051B2

公开(公告)日：2021-07-27

申请号：US16449735

申请日：2019-06-24

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： S.M. Nayeem Hasan ,  Timothy P. Philippart

IPC: F01L1/344 ,  F01M9/10 ,  F02D7/00 ,  F01L1/053 ,  F01L1/047

Abstract: A first high side switch is configured to connect and disconnect a first reference potential to and from a first node, the first node configured to be electrically connected to a second node and a first end of a first inductor coil of a fuel injector of a cylinder and a first end of a second inductor coil of an oil control valve of the cylinder. A second high side switch is configured to connect and disconnect a second reference potential to and from the second node. A first low side switch is configured to connect and disconnect a ground reference potential to and from a second end of the second inductor coil of the oil control valve. A second low side switch is configured to connect and disconnect the ground reference potential to and from a second end of the first inductor coil of the fuel injector.

公开(公告)号：US20180229730A1

公开(公告)日：2018-08-16

申请号：US15429218

申请日：2017-02-10

Applicant: GM Global Technology Operations LLC

Inventor： S.M. Nayeem Hasan ,  Timothy Philippart

IPC: B60W30/18 ,  H02J7/00 ,  F02M51/06 ,  F02N11/08

Abstract: A circuit for compensating for low battery voltage available to power a load includes a power source, an inductor electrically coupled to the power source, a first switch configured to control current flow from the power source to the inductor, and a first diode connecting a first supply rail to the inductor. The circuit also includes a second switch configured to electrically connect the anode of a second diode to the inductor, with the cathode of the second diode connected to a second supply rail. A controller is configured to cycle the first and second switches to achieve a desired voltage values at the first and second supply rails. The second supply rail is electrically connected to the load. The controller is configured to enable the second switch to switch to a closed state only when the voltage at the power source is below a first predetermined threshold voltage.

公开(公告)号：US20200025841A1

公开(公告)日：2020-01-23

申请号：US16040016

申请日：2018-07-19

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Timothy P. Philippart ,  S.M. Nayeem Hasan

IPC: G01R33/07 ,  B60W20/10

Abstract: A system and method for selective reset of a sensor powered from a common power supply. The system includes a power supply, a plurality of sensors, each sensor connected to the power supply, responsive to the power supply, configured to detect a sensed parameter and provide a signal corresponding to the parameter. The system also includes a transimpedance current limiting device connected in series with a sensor of the plurality of sensors that limits current from the sensor, a switching device connected in series with the transimpedance current limiting device, that is controllable to interrupt current flow through the sensor, and a controller connected to the plurality of sensors, the controller monitors various signals from at least one sensor and controls the switching device based on those signals, wherein the controller deactivates the switching device if the current from the sensor exceeds a selected threshold.