Deepakkumar Yadav
Electric Field Stress Estimation and Control ∇2 Φ = p/∈0 … (Eqn 1) Where, Φ = Potential at a given point p = Space charge density in the region and ∈0 = Electric permittivity of free space (vacuum) Equation 1 was given by Poisson and is therefore known as Poisson’s equation for electric field distribution. If in Equation ∇2 Φ = … Read more
Cycloconverter Operation with Inductive Load (Noncirculating Current Mode) In practice the load is never purely resistive. In case of the inductive loads, due to the energy stored by the load inductance, the conducting pair of SCRs continues to conduct in the next half cycle as explained in the AC to DC converters . Therefore as shown … Read more
Static DC Circuit Breaker Q. With neat diagram describe the working of static D.C. circuit breaker. Circuit diagram of Static DC Circuit Breaker : The circuit configuration of a static DC circuit breaker is shown in Figure. Operation of Static DC Circuit Breaker : As soon as the start push button is pressed, a gate triggering pulse is applied … Read more
Single Phase Half Bridge Cycloconverter in Non Circulating Current Mode (With R Load) When operated in the noncirculating current mode, only one converter (either P or N) is ON at any given instant of time. Thyristors from both the converters won’t conduct simultaneously. The load voltage waveforms for a single phase cycloconverter with resistive load are … Read more
DC Servomotor Q. What is meant by DC servo motor? Q. What is the working principle of DC servomotor? Q. What is DC Servomotor? Q. DC Servo Motor Block Diagram of DC Servomotor : Figure shows the block diagram of a closed loop control of a DC servomotor. The armature controlled DC servomotor is being used. Operation of DC Servomotor : In … Read more
Bridge Type Single Phase Cycloconverter Circuit Diagram of Bridge Type Single Phase Cycloconverter : The bridge cycloconverter is as shown in Figure.It consists of two single phase fully controlled converters. The SCRs 1 to 4 form bridge 1 (P – converter) whereas the SCRs 5 to 8 form bridge 2 (N – converter). In this circuit, the … Read more
DC Servomotor DC servomotor is an ordinary dc motor. But separately excited dc motor. The DC servo motors are further classified into two types : Armature controlled type and Field controlled type. Field Controlled DC Servomotor : Construction of DC Servomotor : The construction of field controlled DC servo motor as shown in Figure A. The … Read more
Comparison of AC Voltage Stabilizers Sr. No. Parameter Relay type Solid state Servo stabilizer 1. Principle Relay contract select tap on transformer SCR static switches selected transformer tap Servomotor rotates the autotransformer 2. Use of moving parts Relay No moving parts AC servomotor autotransformer 3. Maintenance Frequent Less frequency Frequency 4. Speed Moderate Very fast … Read more
AC Servomotors Q. What is AC Servomotor? Q. What is meant by AC servo motor? Q. How does an AC servo motor work? Q. What are the applications of ac servo motor In automatic control system it becomes necessary to compare system parameters with some reference. Whatever is the error it is amplified and used to drive motors … Read more
Static VAR Compensation System The general arrangement of static VAR compensator is shown in Figure. VAR (Volt Ampere Reactive) is the unit for measuring the reactive power. VAR compensator is used to reduce the reactive power drawn from a transmission line. It shows that the static VAR compensator consists of TCRs (Thyristor Controlled Reactor) in … Read more