Q6. Answer the following for DC Machines: (i) (iii) (iv) [8] Explain the effect of armature...
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Q6. Answer the following for DC Machines: (i) (iii) (iv) [8] Explain the effect of armature reaction on the performance of a DC generators What are compensating windings and what function do they serve? Explain how they work and why they are connected in series with the armature. Explain why a resistor is needed in series with the armature when starting a DC motor, but is not needed when the motor is operating at its steady-state speed. Define two parameters which are indices of performance of a DC generator such that the corresponding values affect the performance of the generator? Q6. Answer the following for DC Machines: (i) (iii) (iv) [8] Explain the effect of armature reaction on the performance of a DC generators What are compensating windings and what function do they serve? Explain how they work and why they are connected in series with the armature. Explain why a resistor is needed in series with the armature when starting a DC motor, but is not needed when the motor is operating at its steady-state speed. Define two parameters which are indices of performance of a DC generator such that the corresponding values affect the performance of the generator?
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i The armature reaction of a DC generator is the magnetic field that the armature creates that opposes the field of the permanent magnets This can cau... View the full answer
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