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Method for protecting the components of a power electronics module of a starter-alternator system, and system implementing this method

A technology for power electronic modules and alternators, which is applied to engine components, emergency protection circuit devices, motor starting for engines, etc., and can solve problems such as overheating of power electronic components

Pending Publication Date: 2020-03-31
VALEO EQUIP ELECTRIC MOTEUR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In order to solve the problem detailed above of the risk of overheating of a power electronic component during vehicle start-up, the applicant proposes a method for protecting this component in which the temperature of the component is estimated and compared to a temperature threshold such that As soon as the estimated temperature exceeds the temperature threshold, the starter-alternator system stops, so that in starter mode, the vehicle stops starting, and in alternator mode, the system stops generating electricity

Method used

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  • Method for protecting the components of a power electronics module of a starter-alternator system, and system implementing this method
  • Method for protecting the components of a power electronics module of a starter-alternator system, and system implementing this method
  • Method for protecting the components of a power electronics module of a starter-alternator system, and system implementing this method

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Embodiment Construction

[0031] An example of a starter-alternator system in which the method for protecting power electronic components according to the present invention is implemented is described in detail below with reference to the accompanying drawings. This example illustrates the features and advantages of the invention. It is to be reminded, however, that the present invention is not limited to this example.

[0032] In the drawings, the same elements are shown with the same symbols. For the sake of legibility of the drawings, the dimensional ratios between the illustrated elements are not respected.

[0033] The starter-alternator system of the present invention is a multi-phase reversible rotating electrical machine, its function diagram is in figure 1 It is shown in , which is powered by the vehicle's on-board electrical network when it operates in starter mode, and supplies electrical energy to this network when it operates in alternator mode.

[0034] The rotating electrical machine ...

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Abstract

The invention relates to a method for protecting the components of a power electronics module of a starter-alternator system for a vehicle, said starter-alternator system having a control module ableto control the power electronics module, wherein the supply current of the power electronics module is cut when, during a starting phase of the vehicle, a temperature (Tjunction) of at least one of the components of said power electronics module is determined as being greater than a predefined threshold temperature value, said component temperature being determined by estimation using the formula:Tjunction = Tleadframe + Delta, where Tleadframe is the temperature of the substrate on which said power electronics component is mounted and DeltaT is a temperature variation induced in the power electronics component by the flow of current in said component during the starting phase.

Description

technical field [0001] The invention relates to a method for protecting components of a power electronics module of a starter-alternator system. The invention also relates to a system for implementing the method. The invention finds application in the field of rotating electric machines of motor vehicles, in particular in the field of reversible electric machines that can operate in alternator mode and drive mode. Background technique [0002] Today, car manufacturers seek to equip their vehicles with automatic start / stop systems, known to the Anglo-Saxons as "stop and go", for economic and ecological reasons. [0003] Such "stop and go" systems are commonly used on reversible electric machines or starter-alternators coupled to internal combustion engines. The use of a starter-alternator in a "stop-and-go" system includes, in some cases, a complete stop of the internal combustion engine after the vehicle itself has stopped, and then, for example, when the driver's actions ...

Claims

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Application Information

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IPC IPC(8): H02H5/04F02N11/10H02H7/06H02H7/08
CPCF02N11/106H02H5/04H02H7/06H02H7/0816
Inventor B.吉耶尔姆C.格兰齐拉B.布隆德尔
Owner VALEO EQUIP ELECTRIC MOTEUR