Definitions/Meaning

brake system Plausibility Device

• T 11.6.1 A standalone non-programmable circuit, the BSPD, must open the shutdown circuit,
  The shutdown circuit must remain open until power cycling the LVMS or the BSPD may reset itself if the opening condition is no longer present for more than 10 s.

• there should be no additional functionality implemented on all required Printed Circuit Boards (PCBs). The interfaces must be reduced to the minimum necessary signals, i.e. power supply, required sensors and the shutdown circuit. Supply and sensor signals must not be routed through any other devices before entering the BSPD.

• when hard braking occurs, whilst or ≥5 kW power is delivered to the motors. The shutdown circuit must remain open until power cycling the LVMS or the BSPD may reset itself if the opening condition is no longer present for more than 10 s.

• T 11.6.2 The action of opening the shutdown circuit must occur if the implausibility is persistent for more than 500 ms.

• T 11.6.5 To detect hard braking, a brake system pressure sensor must be used. The threshold must be chosen such that there are no locked wheels and the brake pressure is ≤30 bar.

• T 11.6.6 To measure power delivery, a DC circuit current sensor only must be used. The threshold must be chosen to an equivalent of ≤5 kW for maximum TS voltage.

General Requirements

• must have a current sensor that signal when 5 kW power is delivered to the motors , our expected voltage rating is 450V then the max current allowed is

• must have a break pressure sensor to detect when pressure is high Enough to lock the wheels , but if the wheels lock at a pressure higher than 30bar , 30bar should be the max pressure

• Must have a AND gate that requires both constrains form the current sensor and the break pressure senser to keep the shut down circuit closed

• Must have a latch gate that keep the shut down circuit open until the LVMS is reset

2022

we used BSPD FSG & FSUK & FB by QTronic Engineering

• Fully compatibile FSG 2020 e formula Bharat 2020

• 2 input signal 0-5V

• Upper threshold adjustable from 1,7V (its possible to reduse the lower limit by replasing a resistor)

• Auto reset after 10s

• No heating problems

• has a sported testing board

data sheet

https://drive.google.com/drive/folders/1UMB0Nw2II7F3T1YZiDcEOObYPWzfxpaj