The reluctance offered to the stator flux by two very large air gaps in series with high permeability iron, in reluctance machine is maximum, when the space angle θr = ______ ?
A. 0°
B. 45°
C. 90°
D. 180°
Answer:A
The reluctance offered to the stator flux by two very large air gaps in series with high permeability iron, in reluctance machine is maximum, when the space angle θr = ______ ?
A. 0° B. 45° C. 90° D. 180°
Explanation: Only when θr = 90°, the long rotor axis is perpendicular to the stator d-axis, and thus reluctance is maximum.