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Torque Monitoring System And Method

A technology of torque monitoring and control unit, applied in control system, vector control system, control drive, etc., can solve the problems of adding cost and weight of current sensor, sensor failure, etc.

Inactive Publication Date: 2015-06-03
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, current sensors add cost and weight and can be prone to sensor failure

Method used

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  • Torque Monitoring System And Method

Examples

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Embodiment Construction

[0042] This disclosure relates to a torque monitoring system and method for estimating the torque of an electric machine of a vehicle. The inventive torque monitoring system estimates motor torque based on various estimated parameters, but does not rely on measured current feedback from the motor. Accordingly, one or more current sensors may be eliminated from the system. These and other features are discussed in more detail herein.

[0043] figure 1 A powertrain 10 for an electrified vehicle 12 (eg, HEV) is schematically illustrated. Although described as a HEV, it should be understood that the concepts described herein are not limited to HEVs and may be extended to other electrified vehicles, including but not limited to PHEVs, BEVs, and fuel cell vehicles.

[0044] In one embodiment, the powertrain 10 is a first drive system utilizing a combination of the engine 14 and the generator 16 (ie, the first electric machine) and includes at least one motor 36 (ie, the second el...

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PUM

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Abstract

A method according to an exemplary aspect of the present disclosure includes, among other things, controlling a vehicle using an estimated torque of an electric machine, the estimated torque based on one or more parameters associated with the electric machine that are independent from measured current feedback.

Description

technical field [0001] The present disclosure relates to an electrified vehicle, and more particularly, but not exclusively, to a torque monitoring system and method for estimating electric machine torque without measuring current feedback. Background technique [0002] Hybrid electric vehicles (HEV), plug-in hybrid electric vehicles (PHEV), battery electric vehicles (BEV), fuel cell vehicles, and other known electrified vehicles are or generator) instead of or in addition to the internal combustion engine to provide power and different from conventional motor vehicles. The motor is supplied with high voltage current, typically through one or more batteries that store electrical energy. [0003] The electric machine may comprise a synchronous motor having a stator generally surrounding a rotor including internal permanent magnets. Each phase winding of the motor can be monitored by current sensors that directly measure the motor's current. These measured currents can then...

Claims

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Application Information

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IPC IPC(8): H02P21/14B60L15/20
CPCB60L3/12B60L15/20B60L50/16B60L50/61B60L58/30B60L2240/423B60L2240/427B60L2240/429B60L2260/44H02P21/20Y02T10/62Y02T10/64Y02T10/70Y02T10/7072Y02T10/72Y02T90/40Y10S903/903
Inventor 丹尼尔·理查德·利德基法扎勒·乌拉曼·赛义德程思为
Owner FORD GLOBAL TECH LLC