How can the direction of rotation of a DC...

Question 1 / 205eccefa3bacbc34ba4d48060

Question 1 of 205eccefa3bacbc34ba4d48060

How can the direction of rotation of a DC propulsion motor can be changed?

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Question 1 of 20

5eccefa3bacbc34ba4d48060

How can the direction of rotation of a DC propulsion motor can be changed?

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🔍 Key Concepts

• DC motor rotation and torque depend on the interaction between the armature current and the magnetic field • Reversing either the armature current direction or the field polarity will reverse the torque direction • Some changes to brushes or interpoles affect commutation quality, not rotation direction

💭 Think About

• Which part(s) of a DC motor determine the direction of the developed torque: the brushes, the main field, the armature current, or the interpoles? • If you reverse the polarity of both the armature and the field at the same time, what happens to the direction of rotation—does it change or stay the same? • Which of the listed actions would actually reverse the relative direction between armature current and main field, rather than just improving commutation or reducing sparking?

✅ Before You Answer

• Identify which choice directly changes the main field polarity seen by the armature without changing both field and armature together • Confirm which components (brush position, brush order, interpoles) are mainly for commutation/sparking control, not for setting rotation direction • Recall that to reverse rotation, you must reverse only one: either the armature current direction or the main field polarity, but not both simultaneously

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Question 1 of 20

How can the direction of rotation of a DC propulsion motor can be changed?

reversing brush holder position

reversing polarity of the field poles

reversing the brush staggered order

reversing the motor interpole connections

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Question 1 / 205eccefa3bacbc34ba4d48060

Question 1 of 205eccefa3bacbc34ba4d48060

How can the direction of rotation of a DC propulsion motor can be changed?

Back

Question 1 of 20

5eccefa3bacbc34ba4d48060

How can the direction of rotation of a DC propulsion motor can be changed?

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

Quick actions

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