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Questions and Answers
Which type of motor is extensively used in variable speed drives?
Which type of motor is extensively used in variable speed drives?
- Synchronous motors
- Induction motors
- DC motors (correct)
- AC motors
What does a DC motor drive do?
What does a DC motor drive do?
- Converts low current to high current
- Modulates power for the motor
- Integrates between the controller and motor
- All of the above (correct)
What is the formula for the armature current of a DC motor when the motor is at rest?
What is the formula for the armature current of a DC motor when the motor is at rest?
- Ia = (E + Eb) / Ra
- Ia = Eb / Ra
- Ia = (E - Eb) / Ra (correct)
- Ia = (E - Eb) * Ra
Which applications commonly use DC motor drives?
Which applications commonly use DC motor drives?
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What is the advantage of a DC motor in terms of torque compared to its rated continuous torque?
What is the advantage of a DC motor in terms of torque compared to its rated continuous torque?
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