Measurement of High Voltage https://youtu.be/dmWOQiT55-Y Breakdown Voltage BDV Testing of Transformer Oil https://youtu.be/YTp-SjvaA5Q https://youtu.be/nZAg_A1tb0o https://youtu.be/TNbzJRAcZcM Transformer oil name & Filteration https://youtu.be/X1iC0zMTOkk https://youtu.be/PszjUHwVvX4 Equipotential Lines, Electric and Magnetic Field Mapping https://youtu.be/WcSSWN4Tnoo Study of Equipotential Lines https://youtu.be/KyO1_DZnLgs IMPULSE VOLTAGE GENERATOR (Marx Circuit) https://youtu.be/ZEIikw36P80 https://youtu.be/I-HcmFYABuw High Voltage Break Down Tester (for solid insulating material) https://youtu.be/WUOoM3r3yA4 https://youtu.be/hGE935-u8lU https://youtu.be/jUCuNlrICXs BREAKDOWN IN GASES High Voltage Testing (For Different shape of Electrode) (Practical) https://youtu.be/KVANbk...
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Mechanism of breakdown in gases & Townsend’s First ionization coefficient https://www.youtube.com/watch?v=nxQ-721SDvA https://youtu.be/6mR_GSyblIg Measurement of Tangent of Dielectric Loss Angle (tanĪ“) by using Schering Bridge https://youtu.be/tltNgnkivMc https://youtu.be/9u3472lh4W8 https://youtu.be/CLDEyyg4kB4 Electric breakdown, Dielectric strength, Displacement vector (Electrostatic Capacitance) https://youtu.be/_pRKmp1gfUk Townsend’s secondary ionization coefficients for Gases https://youtu.be/dCMHmrgSKno IMPULSE VOLTAGE GENERATOR (Marx Circuit) https://youtu.be/ZEIikw36P80 https://youtu.be/I-HcmFYABuw Streamer theory of dielectric breakdown for Gases https://youtu.be/NgTUq5w2mtA PASCHEN'S LAW & Derivation https://youtu.b...
In the so called “scalar control methods” for induction machines, the motor model is considered just for steady state. Therefore, it is expected that a controller based on these methods can not achieve the best performance during transients. This is the basic drawback of scalar control methods for induction machines In “vector control methods,” the motor model considered is valid for transient .The reference frame used in the FOC is one whose real axis coincides with the rotor flux vector. This frame is not static and does not have a constant speed during transients. Actually, it was not a commonly used reference frame for the analysis of electric machines. The great advantage of this “noninertial” frame is that for impressed stator currents, this method allows independent flux and torque controls as in a separately excited dc machine. Impressed stator currents, that is currents controlled by a fast current loop that can be implemented using cheap hall effect current sensors and p...
VSI vs CSI · When the DC voltage remains constant, then it is called Voltage Source Inverter(VSI ) or Voltage Fed Inverter (VFI). · When input current is maintained constant, then it is called Current Source Inverter (CSI) or Current Fed Inverter (CFI). · Some times, the DC input voltage to the inverter is controlled to adjust the output. Such inverters are called Variable DC Link Inverter s . The inverters can have single phase or three-phase output. § A voltage source inverter(VSI) is fed by a stiff DC voltage, whereas a current source inverter is fed by a stiff current source. § A voltage source can be converted to a current source by connecting a series inductance and then varying the voltage to obtain the desired current. § A VSI can also be operated in curr...
1. List the advantages of electrical braking 2. What is the difference between scalar and vector control of induction motor. 3. Compare CSI fed induction motor drive with VSI fed induction motor drive. 4. Discuss the effect of harmonics on induction motor./ Discuss effect of various harmonic torques of VSI based induction motor drive/Explain the effect of non sinusoidal supply on VSI. 5. Explain closed loop slip control scheme for induction motor. 6. Explain operation of doubly fed induction machine in sub synchronous mode. 7. What are the advantages of V/f control over other scalar control techniques?/Explain constant air gap flux control scheme for induction motor drives. 8. Dr...
SUBJECT: HIGH VOLTAGE ENGINEERING - 2160904 Assignment 1 :- ELECTROSTATIC FIELDS & FIELD STRESS CONTROL Co-1 1. Explain Finite Element Method with its advantages and disadvantages 2. Explain Finite Difference Method (FDM) with its advantages and disadvantages. Assignment 2:- GENERATION OF HIGH VOLTAGE AND CURRENT Co-2 1. Explain Van de Graff generator. 2. Explain the different schemes for cascade connection of transformers for producing very high A.C voltages 3. An 8 stage impulse generator has a stage capacitance of 0.13 uF and charging voltage of 175 kv. The test specimen capacitance is 500 pF. Find wave front and wave tail resistance needed to produce 1.2/50 u sec impulse wave. What is maximum output voltage? 4. Explain different circuit to produce impulse wave . Discuss their relative me...