Control mother board is the host board in
control module. Most functions of the control module are realized on separate daughter
cards that would plug into the control mother board. This helps with easy debugging and
to easily replace modules in case of error or if improvements are needed. Here below is
the list of modules it supports
- HSEC180 connector slot to host
the control card for control processor (TMDSCNCDF28388D)
- DIMM100 connector slot to host
the safety processor (TMS570)
- Connectors to connect to traction
inverter module
- Connectors to connect to dc-dc
converter module
- Connectors to host 5-V/5-A power
supplies for the control unit and inverter gate driver power supply.
- Connectors to host 12-V/1-A power
supply for the DC-DC converter gate driver and 15-V/0.5-A power supply for
resolver
- Connectors to host analog back
end module to process the analog signal feedback from inverter. The close
proximity of this module to the processor slot is to increase integrity of
analog signal chain.
- Connectors to host resolver
module that act as an analog front end between the resolver and MCUs.
- Connectors to host CAN interface
modules based on TCAN4550 and TCAN1042
- Module to help monitor various
power supplies
- Module to control blower fan for
inverter heatsink thermal dissipation
- Debug header to support JTAG and
provide ETAS link
The bare control mother board is
shown in Figure 3-2.
12-V power from a battery or
power supply is fed to the mother board through a power jack receptacle J14. A
single pole double throw switch is used to turn on/ off the power to the control
module. This 12-V power supply feeds two 5-V/5-A power supplies, one to supply power
to entire control module (from which 3.3 V is obtained) and the other to primarily
feed the inverter gate driver power supply. The 12-V power supply also feeds a SEPIC
12 power supply module to feed the dc-dc converter gate driver. For flexibility sake
during testing, certain options are built in the mother board to select the choice
of MCU for certain controls and choice of power supply for resolver interface. These
are described in sections below