Redundant hardware architecture for the low-voltage power supply stage of the braking system of a vehicle in which each of the wheels is connected to at least one rotary electric machine

Abstract

An electric braking system is provided for a road vehicle that includes at least two wheels () each connected for rotation to at least one rotary electric machine (), and one electronic wheel control module () controlling an electric machine of a corresponding wheel, with each electronic control module enabling a control torque of determined amplitude and sign to be imparted selectively to a corresponding wheel. The electric braking system includes at least two sub-systems (A and B) each including: at least one of the electronic wheel control modules (), a central electric line (), and a low-voltage electrical supply stage for supplying electronics for controlling and driving power elements. The low-voltage electrical supply stage includes a first low-voltage electrical supply and at least one second low-voltage electrical supply. The first supply and the second supply are interconnected by a low-voltage electric line () that includes a first section (A) and a second section (B), with the first and second sections being connected by a device () that electrically separates the two sections, and that interrupts an interconnection on demand in an event of one of the two sections experiences an undervoltage or an overcurrent. Each electronic wheel control module () of one (A) of the sub-systems is supplied by the first section and each electronic wheel control module () of the other (B) of the sub-systems is supplied by the second section.