Tricky but Easy Electrical Engineering!
Single Phase Half Wave Controlled Rectifier, as the name suggests, is a rectifier circuit which converts AC input into DC output only for positive half cycle of the AC input supply. The word “controlled” means that, we can change the starting point of load current by controlling the firing angle of SCR. These words might … Read more
Definition: Phase Control of SCR means having control on the phase relationship between the start of current through the SCR and source voltage. Phase Control of SCR Explanation: Whenever we talk of phase angle, we generally mean the angle of a sinusoidal quantity at any instant of time. Phase control of SCR means the phase … Read more
Firing Angle of SCR is defined as the angle between the instant SCR would conduct if it were a diode and the instant it is triggered. We know that, there are two conditions which must be satisfied for turn on of an SCR. They are: SCR must be forward biased i.e. its anode voltage must … Read more
Natural or Line commutation is a Class-F SCR commutation technique in which, a thyristor is turned off due to natural current zero and voltage reversal after every half cycle. This commutation method is only applicable for AC circuit and mostly used in Phase-Controlled Converters, Line-Commutated Inverters, AC voltage controllers and Step-down cycloconverters. Principle of Class-F … Read more
Power Electronics is one of the most important subjects of Electrical Engineering. In fact, without the use of power electronic devices, we cannot imagine modern electrical application. Rectifiers, Inverters, Choppers, Cycloconveters etc find a wide range of application in industries. Most of the student find this subject a bit tough. But, power electronics is not … Read more
The resonant frequency formula for series and parallel resonance circuit comprising of Resistor, Inductor and capacitor are different. In this article, we will go through the resonant frequency formula for series as well as parallel resonance circuit and their derivation. We will also discuss the method to find the resonant frequency for any given circuit … Read more
Class-E Commutation is one of the forced commutation method to turn off an SCR / Thyristor. An external current pulse is used in this technique to commutate SCR. This is the reason, Class-E commutation is also known as External Pulse Commutation. This external current pulse is obtained form a separate voltage source. . Condition for … Read more
The best book for Power System is “Power System by C. L Wadhawa”. Power System is one of the core electrical subject of electrical engineering. This subject also becomes important from GATE / PSUs/IES Exam preparation point of view. Every year, more than 5 questions are asked from Power System in GATE Exam. Therefore, selection … Read more
Class-D Commutation is a commutation method used to turn off thyristor in a DC circuit by the application of a sudden reverse voltage across the terminals of SCR. This is the reason, it is also called Impulse Commutation. A Class-D commutation circuit consists of Main Thyristor T1, Auxiliary Thyristor TA, Capacitor C, Diode D and … Read more
Every electrical engineer must have heard of the book “Basic Electrical Engineering by C. L Wadhwa”. Without the knowledge of basic concepts, one cannot understand the electrical concepts in the higher semesters. Therefore, one must not skip the basic electrical. It is the core of electrical engineering. Thus, selection of a good reference book becomes … Read more