Iit delhi star delta
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This presentation discusses the star-delta conversion rule for simplifying network analysis calculations. It defines delta and star configurations as three resistors connected in a triangle or Y-shape. The key formulas are presented for converting between star and delta networks while maintaining equivalent resistances between connection points. An example numerical problem is worked through to demonstrate finding the equivalent resistance between two points by applying a star-delta conversion.
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modeling solar array with the help of solar cell model[6] for the
actual spacecraft condition.
Modeling of solar array and analyze the current transient response of shunt s...
Spacecraft bus voltage is regulated by power
conditioning unit using switching shunt voltage regulator having
solar array cells as the primary source of power. This source
switches between the bus loads and the shunt switch for fine
control of spacecraft bus voltage. The effect of solar array cell
capacitance [5][6] along with inductance and resistance of the
interface wires between solar cells and power conditioning
unit[1], generates damped sinusoidal currents superimposed on
the short circuit current of solar cell when shunted through
switch. The peak current stress on the shunt switch is to be
considered in the selection of shunt switch in power conditioning
unit. The analysis of current transients of shunt switch in PCU
considering actual spacecraft interface wire length by
illumination of solar panel (combination of series and parallel
solar cells) is difficult with hardware simulation. Software
simulation by modeling solar cell is carried out for a single string
(one parallel) in Pspice [6]. Since in spacecrafts number of
parallels and interface cable length are variable parameters the
analysis of current transients of shunt switch is carried out by
modeling solar array with the help of solar cell model[6] for the
actual spacecraft condition.
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Iit delhi star delta
- 1. PRESENTATION ON NETWORK ANALYSIS STAR-DELTA CONVERSION RULE BY JAGADISH KUMAR GUPTA PGT (PHYSICS) KV R.K.PURAM SEC-2 NEW DELHI
- 2. PURPOSE • Difficulties in network analysis during balanced wheat stone bridge determination • Difficulties in solving unbalanced Wheatstone bridge
- 3. Advantages of star-delta rule • We need not take care of ratio of the sides and to determine which resistor will be omitted • Very easy to solve unbalanced Wheatstone Bridge networks
- 4. What is delta form when three resistances are connected in form of a triangle it is called delta
- 5. What is star form When three resistance are connected in the form of Y or inverted Y it is called star form
- 6. Star to delta conversion formula • The replacement of delta or mesh by equivalent star connection is known as delta - star transformation. The two connections are equivalent or identical to each other if the resistance is measured between any pair of lines. That means, the value of resistance will be the same if it is measured between any pair of lines irrespective of whether the delta is connected between the lines or its equivalent star is connected between that lines.
- 7. • .
- 8. .
- 9. Numerical For the given network what is the equivalent resistance between points E and B
- 10. Solution we consider a star network in place of delta made by 1,2,3 ohm resistance
- 11. Contd….
- 12. Numerical 2
- 13. Solution
- 15. THANK YOU