Saturday , October 23 2021

Power Electronics

Single phase full wave controlled converter

Single phase full wave controlled converter

Single phase full wave controlled converter   The circuit arrangement of a single-phase full converter is shown in Figure 1(a) with a highly inductive load so that the load current is continuous and ripple-free.   During the positive half-cycle, thyristors T1 and T2 are forward biased; and when these two …

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Two transistor model of a thyristor(SCR)

Two transistor model of a thyristor

Two transistor model of a thyristor(SCR)   Question: Explain two transistor model of a thyristor(SCR)? or Explain the construction and working principles of a thyristor? or Explain the positive regenerative feedback effect of a thyristor?   Solution: The regenerative or latching action due to positive feedback can be demonstrated by …

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Describe the working principle of electronic fan regulator?

Working principle of electronic fan regulator

Describe the working principle of electronic fan regulator?   Working principle of electronic fan regulator: Before giving the power supply keep the rheostat or potentiometer within the maximum resistance position in order that no triggering is applied to TRIAC and hence the TRIAC are going to be within the cutoff mode. After giving the power supply varies the potentiometer slowly so …

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Write down advantages and disadvantages of cycloconverter?

advantages and disadvantages of cycloconverter

Advantages and disadvantages of cycloconverter Advantages and disadvantages of cycloconverter: Advantages The cycloconverter is a single-stage converter therefore its efficiency is very high. The cycloconverter operates online commutation(except step up cycloconverter) therefore extra force commutation components are not required. The power transfer in the cycloconverter is possible from supply to …

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What is cycloconverter and its application?

What is cycloconverter and its application

What is cycloconverter and its application?   Cycloconverter A cycloconverter is a direct frequency changer that converts ac power at one frequency to ac power at another frequency by ac-ac conversion, without an intermediate conversion link. Applications of cycloconverter 1. Low-speed,ac motor drives ranging up to 15,000kw with frequencies from …

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what is freewheeling diode and its purpose?

what is freewheeling diode and its purpose

what is freewheeling diode and its purpose? Freewheeling diode: A freewheeling diode is basically a diode connected across the inductive load terminals to prevent the development of high voltage across the switch. When the inductive circuit is switched off, this diode gives a short circuit path for the flow of …

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