Enclosures

Low Voltage (12V)

Power

The fuse boxes are what power the 12V low voltage system (LV). They provide power for practically every board. 

The secondary power board will be what provides power to the fusebox. Power will come from either the DCDC Converter or Supplemental Battery (only during startup and fault states).  

In the event of overcurrent, one of the fuses will blow to ensure no boards are damaged, due to FSGP and ASC regulations they are not resettable fuses, meaning that we need to keep extra fuses on hand. 

Things powered by the fusebox: 

1. Maximum Power Point Tracking Board (MPPT) A

2. MPPT B 

3. MPPT C 

4. Blackbody A

   1. AKA Resistance Temperature Detector Board (RTD)

5. Controls Leader Board

6. Controls Lighting Board

7. Backup camera

8. Horn / 1 Channel Relay

9. Motor Contactor Driver Board

10. Array Contactor Driver Board

11. Supplemental Monitoring Board

12. Telemetry Board

13. BPS Leader Board

14. Radio

15. Driver Fans 

CAN Bus

Within the Electronics Enclosure, the following boards are connected through CAN. All CAN connectors are 4x1 Molex Microfit 3.0 Connectors.

CAN Bus Boards:

1. BPS Leader (Starting Point)

2. Supplemental Battery Monitoring Board

3. Telemetry/Raspberry Pi

4. MPPT A

5. MPPT B

6. MPPT C

7. Blackbody A

8. Controls Leader (Termination Point)

CAN has two wires (CAN High and CAN Low) which are in twisted pairs to reduce noise. 

When determining layout, CAN wires have the highest importance, and thus you should ensure that they are close together. The reason we want CAN wires to be as short as possible is to reduce noise. 

Open

High Voltage (120V)

Contactors

• 2 contactors are located inside the High Voltage Enclosure

  • Motor Contactor

  • Array Contactor

• 3 contactors are located inside the BPS Enclosure

  • HV -

  • HV +

  • Precharge Contactor

• O-Ring crimped to 6 gauge wire

HV vs LV

• We want to ensure that the HV and LV components of the car are separated from each other

• In previous years during scrutineering, the judges did not like not having HV and LV separated

• The HV components not in the BPS are:

  • MPPTs A-C

  • Array Contactor Driver Board

  • Motor Contactor Driver Board

  • Array Contactor

  • Motor Contactor