Team members:
- Nicholas Barr
- Daniel Fargano
- Kyle Simmons
- Marshall Worth
The purpose of our project is to create an efficient interface between a 200V DC source and a 3-phase 1.5 HP (1 kW) AC induction motor. We intend to produce a cold torque of 30N-m and drive the motor to 3000RPM within 5 seconds efficiently. Once we are at 3000RPM, we want to run at an extremely high efficiency, ideally 95% with a goal of 80%. We also want to design the power electronics in such a manner that they are bidirectional, so that if we apply a torque to the rotor, we will be operating in a generating mode, so as to charge a hypothetical 200V lead-acid deep-discharge battery connected to the source. The efficiency of this generation will be a tertiary goal.The project will consist of constructing the power electronics, which includes a DC-DC buck-boost converter and a 3-phase DC-AC inverter, as well as the control systems. The control system will consist of several inputs from the motor in order to determine the phase angle as well as the speed and slip, a microcontroller which will execute code to determine the duty cycles with which to pulse width modulate our power electronics in order to operate within our desired mode, and finally outputs to control our power electronics. We will be optimizing our code to make our interface as efficient as possible, incorporating dead-time and possibly soft switching techniques. We intend to use high voltage IC's to perform the isolation between our control logic and high voltage power control.