Oregon State University Solar Vehicle Team

Solar Car Electrical Architecture

“Where does the electricity come from and go to?”

High Voltage Architecture

Array(~120VDC, 4.5A, x2)

Umbilical

DC-DC buck converter, MPPT

power optimizer x 2

NGM EVC402 motor controller 103V, 200A

Contactor and Sense Module (CSM)

A123 System LiFePO4 battery103VDC, 40AH

NGM SC-M150 hub motor

BatteryManagement

System (BMS)

Throttle Brakes

Low Voltage Architecture

12V Aux Packs Main PowerSwitch

Main Power Hub 103V to 12V DC/DC

103 VDCFrom HV busMain PC with

USB hub

LCD touch screen

A123 SystemBMS (USB to

CAN interface)

Body Control Module

Rear view camera

GPS

Data Telemetry

Circuit Protection

Fuses(over current)

Diodes(reverse current)

Metal Oxide Varistors - MOV(over voltage)

In series with circuit

In series with circuit

In parallel with circuit

Typical Circuit Protection Layout

PROTECTION CIRCUIT

12VDC

SWITCHFUSE

MOV

DIODE

Device to Power(e.g. Computer,

LCD, etc)

+

-