The Problem

Trying to distribute power effectively in complex systems when confronted with unpredictable loads. An example would be extending battery life in smart phones. Typical phones are powered by a single cell battery operating at a fixed voltage, but different components(processor, display, GPS, Bluetooth module…) demand dynamic time varying loads at different conversion ratios. Traditional power architecture and control are designed independently between components to meet each units required specifications. This unidirectional power distribution approach lacks system wide awareness and overcompensates power allocation. Increased system wide efficiency could be attained by integrating multi-input multi-output(MIMO) converters to acquire power flow between units and then apply control to the entire system. The goal is to design MIMO converters with bidirectional energy flow as a proof of concept for new power distribution techniques. 

2×2 MIMO Simulation

The strategy to accomplish demonstrating MIMO converter potential was to divide the project into two parts. The first objective is to provide evidence MIMO converters are a feasible alternative by designing spice and MATLAB simulations to examine power loss. These results were then compared to traditional converters. MIMO tests were completed using DC-DC switched capacitor topology. The models and results for this objective can be found under the simulation tab above.

2×2 MIMO Equation Derivations

The second objective is to advance the design process of MIMO converters for continued study and fast implementation by developing a flexible power efficiency model for arbitrary NxN MIMO converters. Derivations and an analysis for this objective is detailed under the equation derivations tab.