Synchronous machines and motors

Image Days

They are the machines whose speed for a given number of poles is unique and is determined by the network frequency. The frequency being the number of cycles per unit of time. Each loop goes through a north pole and a south pole.


In Europe and in most of the world the frequency of industrial networks is 50Hz and in the USA and some other countries it is 60Hz)

When it works as a generator, the speed of the machine must be perfectly constant.


Electrostatic Generators: History of Static Electricity

Electrostatic generator machine from Wimshurst. Electrostatic generators history

The history of science and technology is a constant evolution of discoveries and improvements. A great example of this is electrostatic machines or generators. In this short essay we are going to see the history of electricity chronologically through discoveries related to electrostatics and their technical applications, especially in the form of generators, since it was discovered that rubbing amber attracted certain objects and it was not well known why even the most modern generators that are now obsolete machines that are used for teaching and recreational physics games.

An electrostatic generator is capable of generating high voltages but with very small currents.. They are based on friction, from mechanical energy that we have to contribute to achieve friction in two materials, one part is transformed into heat and the other into electrostatic energy.


775 engines

dc motor 775

The 775 motors are direct current motors used in many projects and that I think are very little known to people.

When we talk about these types of engines, the 775 refers to the motor size that is standard. In this way we can find 775 manufactured by different brands, with different operating voltages and different power, with 1 set of bearings or with two. But what everyone respects is the size of the engine.


Electric motors improving their control and protection

The old one Schneider Electric Library and their old website disappeared, but we can find all the documentation that there was and the one that they have continued to add in the section of Downloads from your website.

I want to praise this website because it is a great resource to find information on electricity, electronics and automation. All prepared by reputable industry professionals and teachers.


Mendocino Solar Engine

El Mendocino Engine is a electric motor that magnetically levitates and uses solar energy. The beauty of the engine is watching it run while floating in the air. It really looks like magic.

Formed by two different parts, the magnetic system that makes it levitate and the electromechanical part of the motor that makes it turn. The motor has four faces (square section) around an axis, which form the rotor. The rotor block has two sets of coils and a solar cell attached to each side. The shaft is horizontal and has a magnet at each end.

Mendoza magnetic solar motor


Build an AC motor

I have found a website where they show how to build a simple single phase ac motor. I think it is important to emphasize that it only works with one phase.

The engine is made with materials easy to find and developing the engine from the theoretical bases of electricity and electric motors.

I remember when in college I started study electrical machines, they started teaching us a ideal single turn motor. And from here on, they developed it more and more until they got all kinds of engines, but always based on the same principles.

basic motor alternating current