A motor has back emf 110v and armature
current 90 A when running at 1500 rev/min
Determine the power and the torque developed.
with the armature
Answers
Answer:
[tex]permanent-magnet DC (PMDC) motor is a DC motor whose poles are made of permanent
magnets. Permanent-magnet dc motors offer a number of benefits compared with shunt dc motors
in some applications. Since these motors do not require an external field circuit, they do not have
the field circuit copper losses associated with shunt dc motors.
Because no field windings are required, they can be smaller than corresponding shunt DC motors.
they are especially common in smaller fractional- and sub fractional-horsepower sizes.
PMDC motors are generally less expensive, smaller in size, simpler, and higher efficiency than
corresponding DC motors with separate electromagnetic fields. This makes them a good choice in
many DC motor applications. The armatures of PMDC motors are essentially identical to the
armatures of motors with separate field circuits, so their costs are similar too. However, the
elimination of separate electromagnets on the stator reduces the size of the stator, the cost of the
stator, and the losses in the fie[/tex]
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