Deepakkumar Yadav
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
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
Variable Pulse Width and Frequency of Chopper Q. Explain with waveforms the control techniques used for chopper control. The average output voltage of the chopper is determined by the ratio TON /T. VLdc = (TON / T) x V volts Thus both the pulse width TON and the … Read more
Current Limit Control of Chopper (CLC) Q. Explain time ratio control and current limit control chopper method for speed control of d.c. series motor. State any four advantages of chopper based D.C. drive. Q. Explain with waveforms the control techniques used for chopper control. In this strategy the chopper is turned on when the output … Read more
Constant Pulse Width Variable Frequency of Chopper (Frequency Modulation) Q. What is frequency modulation chopper control ? State two methods for this control. List out any two drawbacks of this method. Q. Explain with waveforms the control techniques used for chopper control. Working Principle of Constant Pulse Width Variable Frequency In this method the on time … Read more
Pulse Width Modulation (PWM) techniques for chopper or TRC Q. Explain time ratio control and current limit control chopper method for speed control of d.c. series motor. State any four advantages of chopper based D.C. drive. Q. List the control strategies used for chopper and explain TRC. Q. List the various control techniques used in chopper and … Read more
Control Strategies for Electrical Chopper Q. List the control strategies used for chopper and explain TRC. Q. State the working principle of chopper. State control techniques used for chopper. Q. List the various control techniques used in chopper and explain any one technique in detail. Q. State the application of chopper and list the various … Read more