Electrical System Block Diagram Architecture TE Module Electric

Electrical System Block Diagram / Architecture TE Module � � Electric Control Sys. Fan Control System is largely dependent upon nominal voltage output of TE Purpose: Provide steady, constant electric current to fan to meet airflow needs

Architecture � Simplest Design – TE directly connected to fan TE Module � No Fan electronic components in this system

Architecture � Power Conditioner TE Module � PC Power Conditioning Fan System will be one of 3 designs: Smoothing – flatten output ripple from TE Step Down – Voltage regulation of TE output to match fan’s req’d V Step Up – circuit/switching that increases V supply for fan

Architecture � Power Conditioning with Battery TE Module Power Conditioning Fan Battery � Will require a switching (battery power-> circuit power) � Charging circuit

Architecture � “Complete” – Battery & Aux. Power Conditioning TE Module 12 V DC Output � Same Fan Battery circuitry as previous platform, plus: Step up & Regulation circuitry for 12 V output � The battery is not required, but including it constitutes the most complex design

Concept Selection � Considerations: � Platform selection based on output of TE and electrical needs of fan � Assumptions � Will need a battery for instant fan start-up TE takes time to develop ΔT � Based on most TE characteristics, a step up circuit is likely needed Smoothing TE ripple current->converter->V regulator � Added complexity means increased cost Complex design may be suitable for vendors, the project needs will then change

Electrical System Needs � General Needs (for a Haitian family) � 1. The fan must have a constant, steady current supplied to it. 50% � 2. The current must be supplied for the entire duration of stove operation. 30% � 3. The system starts the fan immediately (i. e. has a battery). 15% � 4. The system has an auxiliary power supply. 5%