JAES is a company specialized in the industrial components sector, and offers full assistance for technicians and maintenance technicians of large installations. Follow us on our social networks: facebook: / jaescompany linkedin: / jaescompany Instagram: https://instagram.com/jaes_company?ig... Inverters have achieved an essential role thanks to the successful diffusion of the electric vehicle, and in general of all the technologies involved in renewable energies. So, what is an inverter and what is it for? In the world of electronics, an inverter is an electronic device with an input and output mode that is capable of changing a direct current input voltage to a symmetrical alternating current output voltage, with the magnitude and frequency desired by the user. As we already told you in the previous video about the history and operation of the electric motor, the usual plug that we have in our homes supplies alternating current. It is generally used to power large devices or appliances such as household appliances, etc. When we observe alternating current, we can see a pattern in which the voltage alternates between its maximum and minimum symmetrical peaks, passing through a zero value. Alternating current could be compared to sea level, and its opposite conditions of high and low tide. During the journey to extreme tide levels, the water in the pair will have to flow through intermediate levels, where it will also have to change direction. On the other hand, common batteries supply direct current, and represent the typical example of direct voltage current generators. Their main characteristic is to present a fixed polarity in their clamps, commonly called positive and negative pole. This type of current is used mostly by devices such as electronic cards, solar panels, etc. In theory, direct current is always kept at maximum voltage, and its flow always runs in a single direction following a straight line. As an analogy, we could imagine a river, or a channel that flows continuously in a straight line, following a single direction and with a constant flow. It is for this reason that we find several types of inverters on the market. JAES offers a wide selection of inverters from the main manufacturers in its catalogue. A more complex type of inverter is necessary when these are integrated into variable frequency drives, or into speed control units, used for speed, torque and direction control of AC motors. As we could see in the previous video, where we covered the dimensions of centrifugal pumps, a practical way to change the rotation of the pump impeller would be to use a frequency converter and keep the design parameters unchanged. Thus, it is very common to find inverters for the control of pumps, fans, compressors and basically any device that generates rotation. As we can see in this animation, the inverter is coupled to a rectifier, then the AC is converted into DC, and then back into AC. The most interesting thing is that the internal drivers will change the frequency and consequently the shape of the sine wave. This configuration will allow precise control of the performance of the motor connected to a mechanical load such as a compressor, etc. In this video we will discover how to obtain pure sinusoidal output electric current from input direct current. Alternating current regularly reverses its direction. That is why the average value of alternating current during one cycle is zero. Before proceeding with the construction of the sine wave, let us see what a square wave is. In this 3D design, we can contemplate the reconstruction of a circuit with 4 switches and an access voltage. This circuit is known as a Diode Bridge. The output is represented between points A and B. To facilitate the analysis of this circuit, let us replace this load with this hypothetical load. In this case, the input mode is represented by a common battery, while this is the hypothetical load. As we can see, there is a current flow only if switches 1 and 3 are connected, while 2 and 4 are disconnected. Now, just invert and observe the current flow. It is clear that in this case, the current flow is opposite, as is the output voltage through the load. This is the basic technique that produces an alternating square wave. The frequency of the alternating current in our homes is 50 Hertz, which means that we are going to...