The heart of the unit is an FPGA-based controller board. Three FPGAs provide the control logic as well as perform functions such as servo control, process input commands and generation of Pulse Width Modulated outputs.
The unit is capable of interfacing with a resolver for position feedback and motor commutation.
The ECU contains two electrically isolated sections. The motor drive circuitry is connected directly to the 28 VDC power bus, which is isolated from chassis ground. The low-level logic circuits, including the FPGA's and telemetry, are tied to chassis ground, and are connected to the motor drivers by high-speed optocouplers.