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For a 45-kVA, three-phase, wye-connected, 220- V synchronous machine at rated armature current, the short-circuit load loss (total for three phases) is 1.80 kWat a temperature of 25°C. The dc resistance of the armature at this temperature is 0.0335 per phase. Compute the effective armature ac resistance in per unit and in ohms per phase at 25°C.
how can I simulate air variable capacitors in cst simulator?
Q. Write notes on clamping ? When a signal drives an open-ended capacitor the average voltage level on the output terminal of the capacitor is determined by the initial charge
DC chopper This is one stage conversion device which is used for direct conversion of fixed de voltage at a level to an adjustable dc voltage at another level.
Interpoles and Compensating Windings: The most generally used method for aiding commutation is by providing the machine with inter poles, also known as commutating poles, or si
Example of high resistivity material is (A) Nichrome (B) Silver (C) Gold (D) Copper Ans: Nichrome is example of high resistivity
A forward converter has the following parameters: input source voltage V s = 100 V, N 1 /N 2 = N 1 /N 3 = 1, magnetizing inductance L m = 5 mH, output inductor L o = 200 μH, C
Q. Explain the theory of thermal runaway? The maximum average power Pdmax which a transistor can dissipate depends upon the transistor construction and may lie in the
advantages of superposition theorem
Dummy coils : These coils are used with wave winding and resorted to when the requirement of the winding are not met by the standard armature punching available in armature win
Calculate the current flow in 30Ω resistor for the circuit in figure using Norton Theorem.
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