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What series is used to analyze the field form?
Answer: b Explanation: The field form of a salient pole is rectangular is the air gap under pole arc is uniform and if fringing effects are neglected. The field form can be analyzed for its harmonic contents with the help of Fourier series.
Answer: b
See lessExplanation: The field form of a salient pole is rectangular is the air gap under pole arc is uniform and if fringing effects are neglected. The field form can be analyzed for its harmonic contents with the help of Fourier series.
How should the air gap and the fringing effects be if the field form of a salient pole machine is rectangular?
Answer: c Explanation: The field form of a salient pole machine is rectangular if the air gap under the pole arc is not constant. The field form of a salient pole machine is rectangular if the fringing effects are not considered.
Answer: c
See lessExplanation: The field form of a salient pole machine is rectangular if the air gap under the pole arc is not constant. The field form of a salient pole machine is rectangular if the fringing effects are not considered.
How should the flux distribution be in the case of ac machines?
Answer: a Explanation: The flux distribution in the case of ac machines should be sinusoidal. The flux distribution in the case of dc machines should be rectangular.
Answer: a
See lessExplanation: The flux distribution in the case of ac machines should be sinusoidal. The flux distribution in the case of dc machines should be rectangular.
How many factors does the flux distribution in the rotating machines depend on?
Answer: b Explanation: The flux distribution in the rotating machines depends upon 3 factors. They are shape of pole, the distribution of field windings and the load condition.
Answer: b
See lessExplanation: The flux distribution in the rotating machines depends upon 3 factors. They are shape of pole, the distribution of field windings and the load condition.
How many rules are to be followed while the flux plotting by method of curvilinear squares?
Answer: b Explanation: The flux lines leave and enter from surfaces, bounding the gap, at right angles if it is assumed that iron has infinite permeability as compared with air and then the flux and equipotential lines intersect at right angles. The flux and the equipotential lines are so drawn thatRead more
Answer: b
See lessExplanation: The flux lines leave and enter from surfaces, bounding the gap, at right
angles if it is assumed that iron has infinite permeability as compared with air and then the flux and equipotential lines intersect at right angles. The flux and the equipotential lines are so drawn that each flux is divided into equal number of curvilinear squares.
What Is the formula of the permeance of the flux tube considering unit depth in the flux plotting technique?
Answer: c Explanation: The permeability in the air, mean width of the flux tube and the mean length of flux tube is calculated first. On substitution the permeance of the flux tube is obtained.
Answer: c
See lessExplanation: The permeability in the air, mean width of the flux tube and the mean length of flux tube is calculated first. On substitution the permeance of the flux tube is obtained.
The plot between carter’s coefficient and the relative flux density is the carter’s fringe curve.
Answer: a Explanation: Carter’s fringe curves is one of the techniques used in the plotting of the field form in the salient pole machines. The plot between carter’s coefficient and the relative flux density is called as carter’s fringe curve.
Answer: a
See lessExplanation: Carter’s fringe curves is one of the techniques used in the plotting of the
field form in the salient pole machines. The plot between carter’s coefficient and the
relative flux density is called as carter’s fringe curve.
What is the formula of the flux density in the gap at a distance ‘x’ from the centre of the pole?
Answer: b Explanation: The length of air gap at the centre of pole, the length of air gap at a distance ‘x’ from the centre of the pole and the maximum flux density in air gap is calculated. On substitution the flux density in the gap at a distance ‘x’ from the centre of the pole.
Answer: b
See lessExplanation: The length of air gap at the centre of pole, the length of air gap at a
distance ‘x’ from the centre of the pole and the maximum flux density in air gap is
calculated. On substitution the flux density in the gap at a distance ‘x’ from the centre of the pole.
How many techniques are used to plot the field form in salient pole machines?
Answer: a Explanation: There are 2 techniques which are used to plot the field form in salient pole machines. They are carter’s fringe curves and the flux plotting by method of curvilinear squares.
Answer: a
See lessExplanation: There are 2 techniques which are used to plot the field form in salient pole machines. They are carter’s fringe curves and the flux plotting by method of curvilinear squares.
What does the flux distribution curve determine in the ac machine?
Answer: a Explanation: The flux distribution curve in the ac machine determines the waveshape of the voltage. In the dc machine the flux distribution curve determines the commutation conditions.
Answer: a
See lessExplanation: The flux distribution curve in the ac machine determines the waveshape of the voltage. In the dc machine the flux distribution curve determines the commutation conditions.