Answer Posted / raja

if you use DC series motor its like universal motor it will work. DC shunt or PMDC will not rotate. in shunt motor due to high field inductance field flux phase difference will hapen due to this motor will stall and vibrate. some time it will rotate very slowly.

After doubling voltage from solar cells & use step down voltage transformer can we get high current output with low voltage.

1930

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what is smart grid? why we use it? explain in detals bcoz i want give presentatin from it....

1901

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1. A 380 / 220 V r.m.s. 3-phase 4-wire circuit carries loads of 8 + j8.1 ohm; 4 + j4.1 ohm; and 2 +j2.1 ohmin the three phases respectively. The length of the circuit is 100 m, and the resistivity of the phase conductors is 0.0005 Ω/m. The neutral conductor is of the same size as the phase conductors. a) Select a reference angle 0for the first phase. Then write down the three phase voltages in both polar format and complex number format. b) Make appropriate assumptions, and take temperature effects on resistance is insignificant. Calculate the currents in the three phases. (Note: Determine conductor resistance, and apply Kirchhoff’s Voltage Law) Based on the result, suggest a main switch rating for the circuit. c) Show your preferred direction of neutral current in a diagram, and then determine its value. (Note: Apply superposition principle, and Kirchhoff’s Current Law) Use its magnitude to show that in this circuit, the unbalanced load may increase the voltage drop in some of the phases. (Note: Also observe the common volt drip in neutral) State your assumptions, if there are any. d) Suddenly the neutral wire of the circuit is broken. Estimate the new currents in the first phase, i.e. Phase L1. State your assumptions, if there are any.

1963

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which is chemical used as in ro water what is difference betweeen multi grade filter&dual media filter

2041

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In convertor can we use rectifier thyristor in place of invertor thyristor with explain.

1756

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Define conversion efficiency of a power amplifier.

1175

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what is electrical machines

3603

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What is difference between Sample test and Routine test in safety standard?

1876

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Can we use a absolute encoder to show rpm of a motor ? what about the condition when power is off ? what is difference if a incremental one is used ?abanirout@gmail.com

1976

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I have been using an 600VA with 0.6 p.f UPS with my desktop which has 450W power supply unit. Can anyone explain how can this happen . Because the output of the UPS is 360W (600*0.6) (<450W)

2076

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what is the write prosidure of stringing of 8meter pcc pole.

2391

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What is the difference between a 3 winding and 2 winding Potential Transformer

2224

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which of the following elements is not present in stainless steel

2485

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What is the minimum underground tank size capacity considered for firefighting purpose?

1905

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How to address the servo drive for motor

1955

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