Method and system for controlling an automotive vehicle three-phase electric machine supplied via chopped voltages

A motor vehicle, wave voltage technology, applied in the direction of controlling electromechanical brakes, control systems, vector control systems, etc., can solve problems such as oscillations that cannot be reduced

Active Publication Date: 2016-06-22
RENAULT SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0032] However, these solutions do not reduce oscillations "at the source", i.e. at the electrical power stage and over the entire speed range

Method used

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  • Method and system for controlling an automotive vehicle three-phase electric machine supplied via chopped voltages
  • Method and system for controlling an automotive vehicle three-phase electric machine supplied via chopped voltages
  • Method and system for controlling an automotive vehicle three-phase electric machine supplied via chopped voltages

Examples

Experimental program
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Embodiment Construction

[0050] Electric Machine 2 by figure 1 The illustrated control system 1 includes a control system for the torque request C from the driver ref Means 3 to determine current setpoints in the Parker frame of reference (d, q, f) with respect to each phase of the electric machine.

[0051]The control system 1 comprises means 4 for regulating the current in the phases of the electric machine. The regulating means 4 determine the supply voltages Vd, Vq, Vf for each phase of the electric machine from these current setpoints received as input.

[0052] The control system 1 also includes means 5 for correcting torque oscillations, which receive as input the supply voltage V for each phase d , V q , V f , the current I of each phase d , I q , I f The measured value of , and the magnetic field speed ω r measurement system. The device for correcting torque oscillations 5 as an output will be aimed at the damping current of torque oscillations sent to each phase.

[0053] A first...

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PUM

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Abstract

System for controlling an automotive vehicle three-phase electric machine (2) supplied via chopped voltages, comprising a means (3) of determining settings of current of the phases of the electric machine as a function of a torque request from the driver, and a means (4) of regulating able to determine voltages of each phase as a function of corresponding settings of current. The system comprises a means (5) of correcting the torque oscillations, which is able to determine the powers of each phase, to determine whether the speed of rotation of the magnetic field exceeds a threshold value, to carry out a bandpass filtering of the powers, and to determine attenuation currents relating to each phase as a function of the post-filtering powers; subtractors (6,7,8) being able to subtract the attenuation currents relating to each phase from the settings of current of the corresponding phases, destined for the regulating means (4).

Description

technical field [0001] The technical field of the invention is the control of electric machines of motor vehicles, and more particularly the control of torque oscillations of such machines. Background technique [0002] In the context of developing electric vehicles, the torque provided by the electric motor must be controlled. Since the torque of a machine is directly related to the currents flowing through it, it is necessary to be able to accurately control these currents. The electric motor to be controlled can obviously be a wound rotor three-phase synchronous machine. [0003] The currents in the three phases of the stator are sinusoidal and each phase shifted by 2π / 3 radians. These currents create a rotating magnetic field in the machine. A DC current is passed through the rotor, which creates a magnetic field, making it equivalent to a magnet. To generate mechanical torque, the stator field is driven out of phase with respect to the rotor field by a quarter cycle...

Claims

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Application Information

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IPC IPC(8): H02P21/05H02P23/04
CPCH02P23/04H02P21/05B60L50/60Y02T10/64Y02T10/72Y02T10/70
InventorA·马卢姆E·尼格雷
OwnerRENAULT SA