Single Phase Full Wave Controlled Rectifier with RL load consists of four thyristors T1 to T4 and they are connected in bridge configuration driving a highly inductive load. Fig. 1 (a) shows the circuit of single-phase fully controlled bridge rectifier with highly inductive load.
Class C Commutation of Thyristor (SCR) | Complementary Commutation | Voltage Commutation
In complementary (or class C) commutation, the SCR carrying load current is commutated (turned-OFF) by transferring its load current to another incoming SCR. The SCR to be commutated is called main SCR and the additional SCR used for commutating the conducting SCR is called complementary SCR. In this technique of commutation, both the SCRs conduct the load current alternately.
What is Brake Power in IC Engine? Definition, Formula & Unit (Rope Brake & Prony Brake Dynamometer)
Brake Power is defined as the net power available at the shaft and is indicated by B.P. It is most important among all the measurements of I.C engine as it involves the measurement of torque and angular speed of the engine output shaft. The different arrangements used for measuring the B.P are as follows.
What is 3 Phase Converter? Types, Working & Circuit Diagram
For the large power, variable speed drives, the 3 Phase AC to DC converters are extensively used. The average output voltage of 3 phase converter provides higher and hence its D.C. output is suitable for large power DC loads.
What is the Two Transistor Model (Analogy) of SCR (Thyristor)? Derivation, Diagram & Working
The SCR is a PNPN semiconductor switching device. It can be considered to be constructed by sandwitching two complementary transistors one PNP and the other NPN type. Fig. 1 (a) shows the structure of two transistor model of SCR.
What is Single Phase Half Wave Controlled Rectifier (with R load)? Working, Circuit Diagram & Waveform
Single phase half wave controlled rectifier consists of single thyristor feeding DC power to the resistive load, resistive-inductive load, and resistive-inductive load with a free-wheeling diode.
Fig. 1: Single Phase Half Wave Controlled Rectifier Circuit Diagram.
What is Natural Commutation (or Line Commutation) of SCR (Thyristor)?
When the input voltage is ac or line voltage, the anode current of an SCR goes to zero at the end of every positive half cycle and a reverse voltage appears across the device. The device is then automatically turned OFF due to the natural behavior of the line voltage. This commutation is called as natural commutation or line commutation. The turn-OFF method of an SCR, by applying the line (i.e. mains a.c.) voltage in which the SCR turns-OFF at every zero voltage, is called commutation of an SCR.
