How Do Energy Flow Control Systems Work?

[johnboy14]

Relevant question

An energy flow control system is one where electrical signals are used to control the flow of energy. quite often electrical energy. A modern example of one such system is the manual control of the speed of a sewing machine motor by way of a foot opearated variable resistor and switching semiconductor device. Analyse and discuss the operation of such a system.

Would I be best explaining this system using a network type of diagram or should I do it some other way. Any suggestions on what I should talk about would be appreciated.

thnks

 

[anorlunda]

I'm not sure what level your talk is at.

I prefer block diagram presentations.

You might mention that all such control systems are imperfect and that they consumer a fractio of the energy themselves.