Archive

Archive for the ‘mechanical’ Category

Tactical Garbage To Energy Refinery

May 30th, 2010

MATERIALS AND METHODS

Retrofits

Modifications of Second Prototype

Water Circulation System

Rubber/Flexible Plumbing

Chiller

Reflux Valve

Pellet Auger/Elevator

Centrifuge Pump and Basket Filter Configuration

CURRENT OUTCOME OF TECHNICAL IMPLEMENTATION

General TGER Parameters

Sub-System Specific Parameters

EXPERT COMMENTARY AND FIVE YEAR VIEW

CONCLUSIONS

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Engineering, chemical, environment, mechanical , ,

Carbon Nanotube Array for Infrared Detection

May 29th, 2010

Introduction

The underlying mechanism of photocurrent generation

Mechanism of photocurrent generation

The reverse rectification ofCNT-Si heterojunctions

Reaching beyond the original goal – establishing the feasibility of developing rectifying namoscale antennas in the optical regine

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Engineering, mechanical ,

Designing A Sensorless Torque Estimator For Direct Torque Control Of An Induction Motor

May 26th, 2010

I. INTRODUCTION

A. BACKGROUND

B. OBJECTIVE

C. INDUCTION MOTOR OVERVIEW

D. APPROACH

II. OBSERVER OF THE ELECTROMAGNETIC TORQUE

A. DERIVATION OF TORQUE EQUATION

1. Flux Linkage and Voltage Equations in the Arbitrary (qd0) Reference Frame

2. Electromagnetic Torque Equation

B. TORQUE ESTIMATOR IN SIMULINK/MATLAB ENVIROMENT

1. Designing the Torque Estimator

2. Computer Simulation — Analysis of the Results

a. Applying a High Pass Filter after the Integration

b. Placing a Low Pass Filter in the Output of the Torque Estimator

c. Comparing the Two Proposed Solutions

III. COMPUTING THE TORQUE OF A REAL MOTOR

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Engineering, electrical, mechanical , ,