Abstract: A braking disengagement switch for a drive wheel driven by a two-phase electric motor, the switch comprising a first disengagement channel connected at a first end to a phase of the motor and to a second phase of the motor at a second end, the first channel switching between an open state and a closed state, the switch comprising a device for monitoring the first channel, the monitoring device comprising: a first transmitter connected to the first end of the first disengagement channel, configured to inject a first state signal between the first end of the first disengagement channel and the motor phase of the electric motor; a first receiver connected to the second end of the first disengagement channel, configured to detect the first signal passing through the first channel when the first channel is in the closed state, the first receiver being configured to determine the state of the first channel.

Abstract: A vehicle includes a chassis and a motor/wheel assembly comprising a drive wheel and a drive electric motor, the vehicle comprising an overspeed detection device, the overspeed detection device comprising a first sensor, the first sensor being configured to measure a speed of rotation, the overspeed detection device comprising a speed reference device for establishing a maximum speed of rotation, the reference device comprising an optical sensor for determining a close environment, the maximum speed of rotation being a function of the close environment, of a predefined functional speed threshold and of a direction of rotation, the overspeed detection device comprising a comparator for comparing the speed of rotation with the maximum speed of rotation, the comparator being configured to stop the rotation of the drive wheel if the speed of rotation is greater than the maximum speed of rotation.