- #1
GeekyGuy
- 8
- 0
I've been pondering over this for a while. Is it possible to make a DC motor that does not require a commutater.
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Discussion Overview
The discussion revolves around the possibility of constructing a DC motor that operates without a commutator. Participants explore various motor types and their functionalities, including brushless DC motors and universal motors, while examining the distinctions between AC and DC motors.
Discussion Character
- Exploratory
- Technical explanation
- Debate/contested
Main Points Raised
- One participant questions the feasibility of a DC motor without a commutator.
- Another participant seeks clarification on the original question regarding DC voltage output without commutation.
- A participant mentions brushless DC motors, explaining that they utilize transistors for switching instead of brushes, indicating a different operational mechanism.
- Discussion includes the universal motor, which can run on both AC and DC, highlighting its construction and advantages despite having brushes.
- Participants note that the definitions of AC and DC motors can sometimes overlap based on their operational characteristics.
Areas of Agreement / Disagreement
Participants present multiple viewpoints regarding the operation of motors without commutators, and the discussion remains unresolved with no consensus on the original question.
Contextual Notes
Some assumptions about motor design and functionality are not fully explored, and the distinctions between motor types may depend on specific definitions and contexts.
- #2
Suerbatica
- 10
- 0
Is it possible to make a Motor output a DC voltage without commutation? I don't fully understand your question.
Suer
Suer
- #3
Cliff_J
Science Advisor
- 789
- 7
Look at brushless DC motors like used on some computer fans - the switching of north/south poles on the stator is handled by transistors that switch back and forth instead of brushes and the armature is permanent magnets.
If you take a universal motor like used in a corded power drill, it does run on AC current from the wall but will also run on DC because its really just a DC motor with the stator and armature wound in series. Sure it has brushes that wear out, but its still cheap to build and has great startup torque and speed control that a shaded-pole AC induction motor couldn't touch and is why its used.
So sometimes the distinctions between what is considered an AC or a DC motor can be blurred somewhat by their operation and not just the power source.
If you take a universal motor like used in a corded power drill, it does run on AC current from the wall but will also run on DC because its really just a DC motor with the stator and armature wound in series. Sure it has brushes that wear out, but its still cheap to build and has great startup torque and speed control that a shaded-pole AC induction motor couldn't touch and is why its used.
So sometimes the distinctions between what is considered an AC or a DC motor can be blurred somewhat by their operation and not just the power source.
- #4
- #5
GeekyGuy
- 8
- 0
Thanks. 
A motor that uses an intelligent electronic controller. I never heard of that before, but it sounds pretty cool.
Thanks again.
A motor that uses an intelligent electronic controller. I never heard of that before, but it sounds pretty cool.Thanks again.
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