Torque in AC Machines: Why is Theta Same?

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SUMMARY

The discussion centers on the relationship between torque and the angle theta in AC machines. It establishes that torque can be expressed as torque = force X radius (Fr sin(theta)) and torque = k (Br X Bs) = k BsBr sin(theta). The key conclusion is that while theta is often considered 90 degrees in the context of DC motors or synchronous motors, it is essential to recognize that the angle can differ based on the specific conditions of the system being analyzed.

PREREQUISITES
  • Understanding of torque calculations in mechanical systems
  • Familiarity with AC machine principles
  • Knowledge of synchronous motor operation
  • Basic physics concepts related to force and rotation
NEXT STEPS
  • Research the differences between torque in AC and DC motors
  • Learn about the role of angle theta in torque calculations
  • Explore the principles of synchronous motors and their torque characteristics
  • Investigate the effects of force direction on torque in rotating systems
USEFUL FOR

Electrical engineers, mechanical engineers, students studying motor dynamics, and professionals involved in the design and analysis of AC machines.

Eng.FA
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hi

i have question related to

torque = force X r = Fr sin (theta)
and
torque = k (Br X Bs) = k BsBr sin (theta)

why does theta the same in both ??
 
Engineering news on Phys.org
theta is not same in both.because in t=frsin(theta) theta will be 90 degrees considering normal dc motors or synchronous motors.because,net force acts in direction in which rotation is possible,that means only along the tangential direction to the rotoe cylinderical body.
 

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