**Laplace Transform**
Laplace transforms and their inverse are a mathematical technique which allows us to solve differential equations, by primarily using algebraic methods...

**Photovoltaic (PV) Panel - Performance Modelling**
In an earlier note on the site [Photovoltaic (PV) - Electrical Calculations], the theory of solar (PV) cell calculations was introduced. In particular...

**Variable Frequency Drive**
Variable frequency drives are widely used to control the speed of ac motors. This note looks at the mechanisms which enable drive units to control the...

**Electromagnetic Fields - Exposure Limits**
Exposure to time varying magnetic fields, from power frequencies to the gigahertz range can have harmful consequences. A lot of research has been conducted...

**Calculating Cable Fault Ratings**
When selecting a cable, the performance of the cable under fault conditions is an important consideration. It is important that calculations be carried...

**Cold Fusion (or not?)**
Recently I have seen a few interesting articles on viable cold fusion; the combining of atoms at room like temperatures to create boundless energy. Now...

**Cost Performance and Time**
Often us engineers get so bogged down in equations, using software, producing drawings and writing specifications that this becomes the sole focus. ...

**Maxwell's Equations - Gauss's Electric Field Law**
Gauss's Electrical law defines the relation between charge ("Positive" & "Negative") and electric field. The law was initially formulated by Carl Friedrich...

**Batteries**
A battery consists of one or more cells, each of which use stored chemical energy to produce electrical energy, There are many types of cells and these...

**Write your best report**
Years ago I was told that you should always try to write the best report you can. Many years later I still think on this as one of the better pieces of...