Electrical4U 
DC to DC converter is very much needed nowadays as many industrial applications are dependent upon DC voltage source. The performance of these applications will be improved if we use a variable DC supply. It will help to improve controllability of the equipments also. Examples of such applications are subway cars, trolley buses, battery operated … Read more
Gate characteristic of thyristor or SCR gives us a brief idea to operate it within a safe region of applied gate voltage and current. So this is a very important characteristic regarding thyristor. At the time of manufacturing each SCR or thyristor is specified with the maximum gate voltage limit (Vg-max), gate current limit (Ig-max) … Read more
The power system has three main parts: generation, transmission, and distribution. This article focuses on power generation, where one form of energy is converted into electrical energy. Electrical energy is produced from various natural sources. Energy sources are classified into renewable and non-renewable types. Currently, most electrical energy is generated from non-renewable sources like coal, … Read more
Before I introduce you about various compensation in control system in detail, it is very essential to know the uses of compensating networks in the control system. The important uses of the compensating networks are written below. Necessary of Compensation Methods of Compensation Series Compensator Feedback Compensator Load CompensatorNow what are compensating networks? A compensating … Read more
Introduced in 1948 by Evans, the root locus technique helps represent any physical system using a transfer function. This function is crucial for analyzing system stability and performance.We can find poles and zeros from G(s). The location of poles and zeros are crucial keeping view stability, relative stability, transient response and error analysis. When the … Read more
In this article, we will discuss discrete signals, made up of digital data in control systems. But first, why do we need digital technology when we have analog systems?So let us discuss first some advantages of digital system over analog system. How do you convert a continuous signal into discrete signals? The answer is simple: … Read more
In network synthesis theory, if any pole of the system is on the right side of the s-plane origin, the system becomes unstable. Based on this, A. Hurwitz and E.J. Routh investigated the conditions for system stability. They developed two stability criteria. The first is the Hurwitz Criterion, also known as the Routh Hurwitz (R-H) … Read more
In this article, we will discuss various methods of starting a three phase induction motor. Before that, it’s essential to understand the torque slip characteristic of these motors.The torque slip characteristic shows that at slip equals one, there is positive starting torque. This makes the three-phase induction motor self-starting. So, why do we need starters? … Read more
Protection of a device is an important aspect for its reliable and efficient operation. Silicon Controlled Rectifier (SCR) are a very delicate semiconductor device. So we have to use it in its specified ratings to get desired output. SCR may face different types of threats during its operation due to over voltages, over currents etc. … Read more
SCRs are available with ratings up to 10 KV and 3 KA. However, sometimes higher ratings are needed. In such cases, multiple SCRs are used together. Series connections meet high voltage demands, while parallel connections meet high current demands. For efficient operation, all SCR should be fully utilized, but due to different V-I characteristics, unequal … Read more