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When is the formula for the flux per pole?
Answer: a Explanation: To obtain the value of flux per pole first the average magnetic field is obtained. Then the pole pitch and the length of the core is obtained to obtain the flux per pole.
Answer: a
Explanation: To obtain the value of flux per pole first the average magnetic field is obtained. Then the pole pitch and the length of the core is obtained to obtain the flux per pole.
See lessThe coil span should be 8.33 percent of pole pitch to obtain the maximum reduction of harmonics.
Answer: a Explanation: The coil span adjustment indirectly affects the harmonics reduction. The coil span should be minimum of about 8.33 percent of pole pitch to obtain the maximum reduction of harmonics.
Answer: a
Explanation: The coil span adjustment indirectly affects the harmonics reduction. The coil span should be minimum of about 8.33 percent of pole pitch to obtain the maximum reduction of harmonics.
See lessWhat is the relation between coil span and harmonics?
Answer: b Explanation: The coil span is kept low in order to decreases the harmonics. The advantage of having lower coil spans is that it reduces the harmonics drastically.
Answer: b
See lessExplanation: The coil span is kept low in order to decreases the harmonics. The
advantage of having lower coil spans is that it reduces the harmonics drastically.
Fractional windings are invariably used in synchronous machines.
Answer: a Explanation: Fractional slot windings reduces the distribution factor for higher harmonics thus reducing their corresponding generated emfs and making the voltage nearly sinusoidally. Fractional slot windings are invariably used in synchronous machines.
Answer: a
Explanation: Fractional slot windings reduces the distribution factor for higher harmonics thus reducing their corresponding generated emfs and making the voltage nearly sinusoidally. Fractional slot windings are invariably used in synchronous machines.
See lessWhen is the range of the number of slots per pole per phase in the salient pole machines?
Answer: c Explanation: The minimum value of the number of slots per pole per phase is 2. The maximum value of the number of slots per pole per phase is 4.
Answer: c
Explanation: The minimum value of the number of slots per pole per phase is 2. The maximum value of the number of slots per pole per phase is 4.
See lessWhat is the range for the stator slot pitch for the large hydro- electric generators?
Answer: d Explanation: The minimum value for the stator slot pitch for the large hydro-electric generators is 50 mm. The maximum value for the stator slot pitch for the large hydro-electric generators is 90 mm.
Answer: d
Explanation: The minimum value for the stator slot pitch for the large hydro-electric generators is 50 mm. The maximum value for the stator slot pitch for the large hydro-electric generators is 90 mm.
See lessWhat is the value of the slot pitch for the low voltage machines?
Answer: c Explanation: The value of the slot pitch depends upon the voltage of the machine. The slot pitch is less than equal to 25 mm for low voltage machines.
Answer: c
Explanation: The value of the slot pitch depends upon the voltage of the machine. The slot pitch is less than equal to 25 mm for low voltage machines.
See lessThe value of slot pitch depends upon the voltage of the machine.
Answer: a Explanation: The value of the slot pitch serves as a guide when choosing the number of armature slots. The value of the slot pitch depends upon the voltage of the machine.
Answer: a
Explanation: The value of the slot pitch serves as a guide when choosing the number of armature slots. The value of the slot pitch depends upon the voltage of the machine.
See lessHow is the number of armature slots associated with the flux densities in iron?
Answer: a Explanation: The large number of slots a greater space is taken up by the insulation. This results in the narrower teeth giving flux densities which may go beyond acceptablelimits.
Answer: a
Explanation: The large number of slots a greater space is taken up by the insulation. This results in the narrower teeth giving flux densities which may go beyond acceptablelimits.
See lessHow is the number of armature slots associated with the tooth ripples?
Answer: b Explanation: The tooth ripples in the field form and the consequent pulsation losses in pole face decrease if a large number of slots are used. Also, the waveform of generated voltage is free from ripples.
Answer: b
Explanation: The tooth ripples in the field form and the consequent pulsation losses in pole face decrease if a large number of slots are used. Also, the waveform of generated voltage is free from ripples.
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