| Abstract: | The ACADS (Advanced Control Actuation Drive System) employs a four-quadrant controller to drive two Maxon brushless DC motors with the capability of energy harvesting. The system is powered by either a 20V or 60V Lithium-Ion battery. It is to be controlled locally or remotely on a phyCORE SOM with browser interface. As per sponsor requirements setup by Lockheed Martin, two boards will control the complete functionality of the system, the Motor Drive Board and Control Board. Dimensions for the Motor Drive Board must be within 3”x3”x3” and the Control Board within 6”x5”x3”. The Control Board houses the power supply converters as well as the connectivity to interface to the phyCORE and the other microcontroller, the Tiva C. The Tiva C will be used for Pulse Width Modulation, current sensing, encoder position tracking. The encoder is used to ensure the motor stays within a -40° to 40° bound, these 80 degrees are the only positions needed for the system and must report position degree to an accuracy of 0.5°. The Motor Driver board will contain the power stage which includes GaN FET's as per requirements. Both motors will interface with this board for hall sensor feedback and power. |