Deepakkumar Yadav
Fuel and Ash Circuit and Air and Gas Circuit in Thermal Power Plant Fuel and Ash Circuit Fuel i.e. coal, from the storage is fed to the boiler through feeding device, which consists of conveyor belt, crushing mill etc. and is called as coal handling plant. Ash produced as a result of combustion of coal … Read more
Electrical Power Generating Process with Blog Diagram Generating stations convert one form of energy into another form of energy. There are various sources in the nature having some form of energy from which mechanical energy is obtained which is converted into electrical energy. Following is the line block diagram giving the energy conversion basically. Energy … Read more
Two Quadrant Choppers Type C Q. Classify chopper based on output voltage and quadrants of operation. List any four applications of chopper. Q. Classify choppers based on quadrants of operation. Sketch only circuit diagram of each. Q. With the help of neat circuit diagram and necessary waveforms, explain class C chopper. Q. Draw and explain … Read more
Advantages of Electric Traction As compared to steam traction, electric traction has the following advantages : 1. Cleanliness. Since it does not produce any smoke or corrosive fumes, electric traction is most suited for underground and tube railways. Also, it causes no damage to the buildings and other apparatus due to the absence of smoke … Read more
Define chopper. Differentiate constant frequency control technique, PWM and variable frequency control technique principle. Sr No. Parameter PWM control (Constant f control) Variable frequency control Current limit control 1. Variable parameter TON is variable, (f or T is constant) to vary average output voltage. TON is constant, f is varied to vary average output voltage. … Read more
Type B Chopper [Regenerative Chopper] Figure (a) shows the type B single quadrant chopper. The positions of the switch and the diode are interchanged as compared to Type A chopper. Due to this position interchanging, the output current io can only be negative but vo will be positive. The direction of power flow now reverses and it … Read more
There are three basic pathways electric current travels through the body 1) Touch Potential (hand/hand path) 2) Step Potential (foot/foot path) 3) Touch/Step Potential (hand/foot path) Figure illustrates these groups and the path of current through the body. 1) Touch Potential (hand/hand path) In a touch potential contact, current travels from one hand through the … Read more
Single Quadrant Choppers (Type A and Type B) Q. Classify chopper based on output voltage and quadrants of operation. List any four applications of chopper. Q. Classify choppers based on quadrants of operation. Sketch only circuit diagram of each. Q. Draw schematic circuit diagram of Class-B chopper and necessary waveforms. Q. Write comparisons of type … Read more
Single, Two and Four Quadrant Choppers Q. Classify choppers based on output voltage and quadrants of operation. Give applications of chopper. (at least four) Q. Classify choppers based on output voltage and quadrants of operation. List four applications of chopper. Q. Classify choppers based on quadrants. The dc choppers consist of power switches such as … Read more
Principle of Step Down Chopper Q. Describe step up and step down chopper with neat diagram. Q. Describe step-up and step-down chopper. Circuit Diagram Step Down Chopper The circuit diagram and the output voltage and current waveforms of a step down chopper are as shown in Figure (a) and (b) respectively. The load is purely … Read more