4 Torque equation

What is the torque equation of an ideal BLPM sine wave motor?

• T = πABrl sinβ

• B) T = πABrl cosβ

• C) T = πABrl tanβ

• D) T = πABrl secβ

What does the power angle (or torque angle) represent in the torque equation of an ideal BLPM sine wave motor?

• The angle between the stator and rotor magnetic fields

• B) The angle between the stator and rotor electrical axes

• C) The angle between the stator and rotor mechanical axes

• D) The angle between the stator and rotor flux linkages

In the torque equation of an ideal BLPM sine wave motor, what happens to the rotor torque as the power angle (or torque angle) increases?

• A) It decreases

• B) It increases

• C) It remains constant

• D) It becomes negative

The torque equation of an ideal BLPM sine wave motor is T = π A B rl sin β. What does "rl" represent in this equation?

• A) Load torque

• B) Resistance of the armature winding

• C) Length of the armature winding

• D) Rotor flux linkage Answer:

In an ideal BLPM sine wave motor, the torque experienced by the rotor is equal to:

• A) Torque developed by the rotor

• B) Torque developed by the stator

• C) Torque developed by the load

• D) Torque developed by the power source

In the torque equation of an ideal BLPM sine wave motor, what does the term "sin β" represent?

• A) Power angle or torque angle

• B) Flux linkage

• C) Armature resistance

• D) Stator winding inductance