Making a DC Motor: Is Magnetic Rod Needed

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SUMMARY

In constructing a DC motor, the rod must be magnetic to ensure proper functionality. The discussion highlights that a common mistake among beginners is misaligning the commutator with the rotor coil. The coil should be energized when it is in the same plane as the magnetic field, not perpendicular to it. A schematic of the motor can help diagnose issues more effectively.

PREREQUISITES
  • Understanding of DC motor components: stator, rotor, and commutator
  • Knowledge of magnetic fields and their role in motor operation
  • Familiarity with basic electrical circuits and coil energization
  • Ability to create and interpret motor schematics
NEXT STEPS
  • Research the principles of magnetic fields in DC motors
  • Learn about proper alignment techniques for commutators in motor design
  • Explore common troubleshooting methods for DC motor assembly
  • Study the construction and operation of simple demonstration DC motors
USEFUL FOR

Electronics enthusiasts, hobbyists building DC motors, and educators teaching basic motor principles will benefit from this discussion.

9876098
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when making a dc motor, should my rod be magnetic or not,i tried one w/o it being magnetic and it didn't work. Was wondering if this was the issue.
 
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9876098 said:
when making a dc motor, should my rod be magnetic or not,i tried one w/o it being magnetic and it didn't work. Was wondering if this was the issue.

Your rod? A DC motor is made up of a stator, a rotor and a commutator. Which part are you calling the "rod"?

Welcome to the PF, BTW.
 
Hi 9876098, why don't you post a brief schematic of your motor and then perhaps someone can tell you what is wrong with it.

BTW. One common newbie mistake when making a simple DC motor (I assume it's a simple demonstration motor with single coil rotor and some form of very simple two segment commutator) is the incorrect alignment of the axis of commutator with the axis of the rotor coil. People often think that the coil should be energized (via the commutator) when it is perpendicular to the magnetic field, but it actually should be in the same plane as the magnetic field at this point.
 

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