Step up Chopper - Definition, Circuit Diagram and its Working Principle: In a step-down chopper the output voltage lies between zero and supply voltage. However, there are techniques by which the output of a chopper…
Three Phase Converter Circuit: For large sized (rating exceeding 15 kW) motors 3-phase drive is employed. The output voltage of a 3-phase converter has less ripple contents than that of single-phase converter. So the filtering…
Single Phase Dual Converter Circuit Diagram with Four Quadrant of Operation: We have seen that Single Phase full Converters with inductive loads allow only a two-quadrant operation. If two of these full converters are connected…
Single Phase Full Wave Controlled Rectifier (or Converter): In case of Single Phase Full Wave Controlled Rectifier (or Converter) both positive and negative halves of ac supply are used and, therefore, the effective value of…
Single Phase Half Wave Controlled Rectifier with Resistive Load and Inductive Load: In a Single Phase Half Wave Controlled Rectifier only one SCR is used in the circuit. It is included in between the ac…
What is a Power Converter? Solid-state power converter are employed for obtaining the appropriate form of electrical energy such as direct current or adjustable-frequency alternating current (required to operate most electronic circuits and motor drives)…
UJT as Over Voltage Detector Circuit Diagram: UJT as Over Voltage Detector Circuit Diagram - A simple dc overvoltage detector circuit is given in Fig. 26.96. It operates on the fact that the device remains…
UJT Relaxation Oscillator - Circuit Diagram and its Workings: UJT Relaxation Oscillator - The relaxation oscillator shown in Fig. 26.94 (a) consists of UJT and a capacitor C which is charged through resistor RE when…
UJT Triggering of SCR Working Principle: UJT Triggering of SCR Working Principle - One common application of the unijunction transistor is the triggering of the other devices such as the SCR, triac etc. The basic…
Power BJT - Construction, Operation and its Characteristics: Power transistors are large-area devices. Because of differences in geometry and doping concentrations, their properties tend to vary from those of the small-signal devices. The structure of…
