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Electrical Machines
In a stepper motor the detente torque means
maximum of the static torque with the phase winding unexcited.
minimum of the static torque with the phase winding excited.
minimum of the static torque with the phase winding unexcited.
maximum of the static torque with the phase winding excited.
maximum of the static torque with the phase winding unexcited.
minimum of the static torque with the phase winding excited.
minimum of the static torque with the phase winding unexcited.
maximum of the static torque with the phase winding excited.
Answer
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Related Question
Electrical Machines
Direct axis reactance is defined as the ratio of
Vmax to Imin
Vmin to Imin
Vmax to Imax
Vmin to Imax
Vmax to Imin
Vmin to Imin
Vmax to Imax
Vmin to Imax
Answer
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Electrical Machines
Fifth harmonic component of the induced voltage in three phase AC generator can be eliminated by using a winding pitch of
2 / 3.
6 / 7.
4 / 5.
5 / 6.
2 / 3.
6 / 7.
4 / 5.
5 / 6.
Answer
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Electrical Machines
If s is the slip and f is the supply frequency of an induction motor, the frequency of rotor current is given by
sf / 2.
sf.
f / s.
s2.
sf / 2.
sf.
f / s.
s2.
Answer
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Electrical Machines
In a DC Shunt Motor if the load current increases then field flux
decreases.
decreases
remains constant.
increases.
decreases.
decreases
remains constant.
increases.
Answer
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Electrical Machines
The armature of DC machine is made of silicon steel lamination to
reduce eddy current loss only.
increase the permeability.
reduce hysteresis loss only.
reduce both eddy current and hysteresis loss.
reduce eddy current loss only.
increase the permeability.
reduce hysteresis loss only.
reduce both eddy current and hysteresis loss.
Answer
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