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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
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.
See lessWhat is the formula for the zigzag permeance?
Answer: a Explanation: The average width of the rotor tooth is first calculated along with the mmf per slot. On substitution, the zigzag permeance is found out.
Answer: a
Explanation: The average width of the rotor tooth is first calculated along with the mmf
per slot. On substitution, the zigzag permeance is found out.
See lessWhat are the factors the overhang leakage reactance is obtained?
Answer: d Explanation: The overhang leakage reactance depends upon the length of the overhang. It also depends upon the shape of the overhang.
Answer: d
Explanation: The overhang leakage reactance depends upon the length of the overhang.
It also depends upon the shape of the overhang.
See lessThe overhang leakage reactance depends on the degree of saturation in the ferromagnetic parts.
Answer: a Explanation: The overhang leakage reactance depends on the length of the overhang and the shape of the overhang. The overhang leakage reactance also depends upon the degree of saturation in the ferromagnetic parts.
Answer: a
Explanation: The overhang leakage reactance depends on the length of the overhang
and the shape of the overhang. The overhang leakage reactance also depends upon the
degree of saturation in the ferromagnetic parts.
See lessWhat is the formula of the specific permeance?
Answer: b Explanation: The permeability in air, small change in width and length is calculated first. On substitution the specific permeance is calculated.
Answer: b
Explanation: The permeability in air, small change in width and length is calculated first.
On substitution the specific permeance is calculated.
See lessWhat is the formula of the flux dividing into infinitesimal parts?
Answer: b Explanation: The mmf producing the flux and the permeance of infinitesimal part is calculated. On substitution the flux dividing into infinitesimal parts is calculated.
Answer: b
Explanation: The mmf producing the flux and the permeance of infinitesimal part is
calculated. On substitution the flux dividing into infinitesimal parts is calculated.
See lessWhich machine incorporates the usage of the closed slots?
Answer: c Explanation: The closed slots are being made use often in the small induction motors. The closed slots are used to increase the leakage reactance which in turn decreases the starting current.
Answer: c
Explanation: The closed slots are being made use often in the small induction motors.
The closed slots are used to increase the leakage reactance which in turn decreases the
starting current.
See lessThe leakage flux on the top of the slot is through iron, which is called ‘bridge’?
Answer: a Explanation: The leakage flux on the top of the slot is through iron, which is called ‘bridge’. Therefore the specific permeance of this path depends upon the permeance of iron which in turn depends upon the degree of saturation and hence upon the relative permeability of iron
Answer: a
Explanation: The leakage flux on the top of the slot is through iron, which is called
‘bridge’. Therefore the specific permeance of this path depends upon the permeance of
iron which in turn depends upon the degree of saturation and hence upon the relative
permeability of iron
See lessWhat happens in the rotating electrical machine?
Answer: b Explanation: In the rotating electrical machine, the armatures are slotted and there is movement of rotor. Due to the movement of the rotor there are rapid changes of local gap reluctance.
Answer: b
Explanation: In the rotating electrical machine, the armatures are slotted and there is
movement of rotor. Due to the movement of the rotor there are rapid changes of local
gap reluctance.
See lessWhat is pulsation losses?
Answer: d Explanation: In the rotating electrical machine, the armatures are slotted and there is movement of rotor which leads to changes of local gap reluctance. This change leads to flux pulsations which causes additional losses called pulsating losses.
Answer: d
Explanation: In the rotating electrical machine, the armatures are slotted and there is
movement of rotor which leads to changes of local gap reluctance. This change leads to
flux pulsations which causes additional losses called pulsating losses.
See less