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Method for controlling rotating electric machine, particularly alternator

A technology for alternating current generators and rotating electrical machines, which is applied to control the direction of generators, battery circuit devices, and current collectors through changes in the magnetic field. It can solve problems such as internal combustion engine stalling and excessive torque, and achieve the effect of improving regulation

Inactive Publication Date: 2011-05-25
VALEO EQUIP ELECTRIC MOTEUR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Considerable demands on the charge, especially as a result of switching on electrical devices of the on-board network, such as the air-conditioning system, result in excessive moments that may be required and may cause the internal combustion engine to stall

Method used

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  • Method for controlling rotating electric machine, particularly alternator
  • Method for controlling rotating electric machine, particularly alternator
  • Method for controlling rotating electric machine, particularly alternator

Examples

Experimental program
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Effect test

Embodiment Construction

[0048] figure 1 An assembly 100 of a motor vehicle is shown comprising a polyphase rotating electric machine 1 formed in the example concerned by an alternator.

[0049] The alternator 1 can be rotated by the internal combustion engine of the motor vehicle in order to generate electrical energy.

[0050] In known manner, the alternator 1 firstly comprises a stator comprising windings which, in the example described, form three phases, and secondly a rotor comprising an excitation winding.

[0051] As a variant, the electric machine 1 can be an alternator-starter.

[0052] The alternator 1 is connected to an on-board battery 2 on the motor vehicle.

[0053] The assembly 100 additionally includes a device 10 for controlling the alternator 1 , which can supply an electric current whose intensity varies depending on a signal or excitation pulse EXC generated by the control device 10 .

[0054] A duty cycle DC1; DC2 is associated with each excitation signal EXC.

[0055] imag...

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PUM

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Abstract

The invention relates to a method for controlling an alternator or alternator-starter of a motor vehicle, the electric machine being capable of providing an electric current, the strength of which varies on the basis of the excitation signal (EXC), a duty cycle being associated with each excitation signal, the method comprising the following steps: comparing the difference between the duty cycle values of two consecutive excitation signals at a predetermined threshold; if said difference is greater than the predetermined threshold, releasing a gradual response phase, during which the duty cycle of the excitation signals is gradually increased, particularly in a substantially linear manner; at the start of said gradual response phase, increasing the duty cycle of the consecutive excitation signals by a predetermined jump (D_B), then gradually increasing the duty cycle, the duty cycle jump at the start of the gradual response phase being less than or equal to the release threshold of the gradual response phase.

Description

technical field [0001] The invention relates in particular to a method for controlling a rotating electric machine, in particular an alternator or alternator-starter of a motor vehicle, and a device for implementing such a method. Background technique [0002] A system for generating electricity for an on-board network of a motor vehicle is known from patent application FR 2 803 447 . The system includes a three-phase alternator associated with a three-phase inverter. The electronic control unit performs voltage regulation by modulating the control pulse width. [0003] In general, especially in systems of the aforementioned type, it is necessary to keep the voltage of the on-board network at a required value, for example at approximately 14 volts. [0004] When the motor vehicle is at a standstill (internal combustion engine running), the alternator rotates at a reduced speed, eg approximately 800 rpm, in order to minimize fuel consumption. [0005] Considerable demands ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P9/24H02J7/14
CPCH02P6/14
Inventor 皮埃尔·蒂泽兰德皮埃尔·查萨德
Owner VALEO EQUIP ELECTRIC MOTEUR
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