block diagram of the electromechanical energy conversion of a power tool
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block diagram of the electromechanical energy conversion of a power tool
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- For 4 pole d.c machine armature winding with a double layer progressive simplex wave winding with 23 number of slots answer the following: a How many coils are present? b What is the coil span in terms of number of slots? c What is commutator pitch in terms of commutator segments? d How many coils are there between two consecutive commutator segments? e How many parallel paths are present?e = 0 Q1: What does happen if we change two currents? a. Q2: What does happen if we have a three-phase four poles machine? Q3: What does happen if we have a two-phase two poles machine? e = 0 Q4: What does happen if we apply a capacitance in phase b and then use same voltage for both phase. Dr. Ali Ki. pw --Question: In Dc chopper, the input voltage waveform is and the output voltage waveform is Option 1: Discontinuous,Continuous Option 2: Continuous, Discontinuous Option 3: Discontinuous,Discontinuous Option 4: Continuous,Continuous
- 1-Which function we call for three phase short circuit occurs in synchronous generator armature terminals at no load condition a.symshort b.lgfault c.llfault d.symfault 2-The FACTS devices support to control a.susceptance b.reactive power c.real power d.apprant powerThe reactance's of the alternator during the periods of steady state are given bellow, Leakage reactance(X)=0.18 ohm, and armature reactance (Xa)= 0.67 ohm. The value of the syncronous reactance during the steay state conditions is Syncronous Reactance in ohmIn the field circuit model of a DC machine, a variable _____ is usually inserted in series with the field winding to vary/control the _____ that flows through that circuit. A resistor, voltage B resistor, current C inductor, current D inductor, voltage
- The reactance's of the alternator during the periods of steady state are given bellow, Leakage reactance(X)=0.18 ohm, and armature reactance (Xad) = 0.67 ohm. The value of the syncronous reactance during the steay state conditions is Syncronous Reactance in ohmCombination circuit what is PT? RT? IT? Voltage Across each load?A commutator segment has 556 segments. Indicate whether or not the winding is possible; triplex wave for 6 poles.
- For dc machines, the series field windings have many turns of fine wire true FalseIn 2-pole machines: the wave winding have greater generated voltage than *.the lap winding armatures True False *.For high rotating speed machines the number of poles must be Little True False The reactance voltage is added in the coil undergoing commutation to * reduce the spark True FalseA 3 phase fault occurs at point F as shown in figure. Determine the critical clearing anglefor the system. The generator is delivering 1.0 p.u power under prefault condition.