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Method And Apparatus To Determine An Effective Temperature Of Coolant Fluid For A Heat Generating Device

A fluid temperature and heating device technology, applied in the temperature field, can solve problems such as reducing motor torque output

Inactive Publication Date: 2016-06-29
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, reducing the motor torque output is not desirable from the viewpoint of the desired performance of the heat generating device

Method used

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  • Method And Apparatus To Determine An Effective Temperature Of Coolant Fluid For A Heat Generating Device
  • Method And Apparatus To Determine An Effective Temperature Of Coolant Fluid For A Heat Generating Device
  • Method And Apparatus To Determine An Effective Temperature Of Coolant Fluid For A Heat Generating Device

Examples

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Embodiment Construction

[0018] Referring now to the drawings, in which the description is for the purpose of illustrating certain particular embodiments only and not for the purpose of limiting them, figure 1 Elements of an electrically driven motor / generator (electrical machine) 20 , associated cooling / lubrication system 40 and controller 10 executing a control routine 200 are schematically shown. As described herein, the electric machine 20 is used to generate traction on the vehicle, although the invention is not so limited. The motor 20 is an example of a heat generating device. Other heat generating devices employing embodiments of the controller 10 and associated cooling / lubrication system 40 executing the control routine 200 may be considered within the scope of the present invention.

[0019] The electric machine 20 includes a stator 22 and a coaxial rotor 24, and may be any suitable electric machine, such as an asynchronous motor or a synchronous motor. In one embodiment, electric machine ...

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PUM

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Abstract

A method for dynamically monitoring temperature of a fluid at a heat generating device includes monitoring, using a temperature sensor, temperature of the fluid held in a fluidic sump. A first fluidic flow rate and a second fluidic flow rate are determined. A third fluidic flow rate and a temperature drop of the fluid across the heat exchanger in the active coolant circuit are determined based upon the temperature of the fluid and the third fluidic flow rate through the active coolant circuit. A fluid temperature supplied to the electric machine through the active coolant circuit is determined based upon the third fluidic flow rate and the temperature drop of the fluid across the heat exchanger. An effective temperature of the fluid is determined based upon the temperature of the fluid in the sump and the temperature of the fluid supplied to the electric machine through the active coolant circuit.

Description

technical field [0001] The invention relates to a cooling system for a heat-generating device including an electric motor, and the temperatures associated therewith. Background technique [0002] The background description provided herein is for the purpose of generally presenting the context of the disclosure. The work of the inventors of this application, to the extent described in this Background section, is neither expressed nor implied as prior art to this application that was not prior art at the time of filing the application. [0003] Devices that generate heat during operation may be equipped with cooling systems to remove the heat to prevent temperature related damage. One form of heat-generating devices includes electric motor / generators (electrical machines), including those used in hybrid and electric vehicle applications. The heat generating device can provide temperature feedback to the control system to control operation and prevent temperature related dama...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K9/00H02K9/19
CPCH02K9/00H02K9/19F28D15/00H02K9/24H02K11/25G01K13/02F28F27/00G01K13/026
Inventor D.J.贝里
Owner GM GLOBAL TECH OPERATIONS LLC
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