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The torque required to accelerate a drive is called the

  • A.static torque
  • B.breakdown torque
  • C.no-load torque
  • D.dynamic torque

Answer: D

It exists only while the speed is changing and vanishes in the steady state, which is why the machine must be rated for a starting current in excess of its running value. Its magnitude is the inertia times the acceleration.

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