System for controlling a voltage converter
AssigneeValeo Equipements Electriques Moteur
InventorsMathieu Bertrand, Yann Lecocq, Hicham Lahbil
Life of this patent
Estimating the term…
Abstract
The invention relates to a system 1 for controlling a voltage converter comprising a plurality of high-side switches forming a high group and a plurality of low-side switches forming a low group, the control system 1 comprising: a module 10 for measuring a voltage V of the DC voltage source B, a module 11 for comparing the measured voltage V with a first safety threshold OV1, a control module 12 for controlling a first group of switches so as to close chosen from the high group or the low group, if the comparison module 11 indicates that the measured voltage V is higher than the first safety threshold OV1.
Claims9
A system for controlling a voltage converter, the voltage converter being configured to connect a rotary electric machine to a DC voltage source comprising an on-board network, the voltage converter comprising a plurality of switching arms connected in parallel, each arm comprising a high-side switch and a low-side switch connected to one another at a midpoint that is configured to be connected to said rotary electric machine, the high-side switches forming a high group and the low-side switches forming a low group, the control system comprising:
- a module for measuring a voltage of the DC voltage source;
- a comparison module for comparing the measured voltage with a first safety threshold;
- a control module for generating a command to close a first group of switches chosen from the high group or the low group when the comparison module indicates that the measured voltage is higher than the first safety threshold, wherein
- the comparison module is configured to compare the measured voltage with a second safety threshold higher than the first safety threshold and the control module is further configured to, when the measured voltage is higher than or equal to the second safety threshold, generate a second command to close a second group of switches chosen from the high group or the low group, said second group of switches being different from said first group of switches.
An electrical system comprising:
- a first and a second power supply terminal configured to be connected to a DC voltage source to a battery of a motor vehicle;
- a rotary electric machine comprising a stator having at least three phases;
- and
- a voltage converter for supplying the rotary electric machine with power from said DC voltage source, the voltage converter comprising:
- a plurality of switching arms connected in parallel, each arm comprising a high-side switch and a low-side switch connected to one another at a midpoint, each midpoint being connected to at least one phase of said rotary electric machine, and
- a unit for controlling the high-side and low-side switches, said control unit comprising a control system, the control system comprising
- a module for measuring a voltage of the DC voltage source;
- a comparison module for comparing the measured voltage with a first safety threshold;
- a control module for generating a command to close a first group of switches chosen from the high group or the low group when the comparison module indicates that the measured voltage is higher than the first safety threshold, wherein
- the comparison module is configured to compare the measured voltage with a second safety threshold higher than the first safety threshold and the control module is further configured to, when the measured voltage is higher than or equal to the second safety threshold, generate a second command to close a second group of switches chosen from the high group or the low group, said second group of switches being different from said first group of switches.
Dependencies are inferred from the claim text.