Small size Motor to generate this torque

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    Magnet Motor Torque
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Discussion Overview

The discussion revolves around the selection of a small motor capable of generating a torque of 0.4 N*m to operate two magnets that disconnect when rotated 20°. Participants explore options for motor types, particularly focusing on size and torque requirements.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested, Homework-related

Main Points Raised

  • One participant describes the need for a small motor that can produce 0.4 N*m of torque to move magnets.
  • Another participant notes that torque varies with RPM and suggests that specific torque at the required RPM is necessary for evaluation.
  • A different participant suggests using a gearbox to increase torque while reducing RPM.
  • A later reply mentions the discovery of micro servo motors, indicating a preference for low RPM and compact size, suggesting that this type may meet the requirements.

Areas of Agreement / Disagreement

Participants express varying opinions on the type of motor suitable for the task, with some suggesting servo motors and others discussing the potential use of gearboxes. No consensus is reached on the best solution.

Contextual Notes

Participants do not specify the exact RPM required, and there is an assumption that torque can be adjusted through gearing. The discussion lacks definitive conclusions about the motor specifications.

Who May Find This Useful

Individuals interested in small motor applications, particularly in robotics or compact mechanical designs, may find this discussion relevant.

zach_wildmind
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Good day everyone. I have two magnets where if I rotate them 20° they disconnect. It has a 0.4 N* m force of torque. I want to make them move with a motor. However I need it as little as possible. So after doing research I found tiny motors that are around 4000 RPM. It doesn't mention the HP they produce. I was wondering if there was a way I could find out if the motor is strong enough to produce 0.4 N*m of force. Any help is appreciated. Thank you so much!
 
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zach_wildmind said:
I was wondering if there was a way I could find out if the motor is strong enough to produce 0.4 N*m of force.
The torque will vary with RPM. You need the specific torque for the RPM you require. It sounds like you need a servo motor.
 
What rpm do you need? You can increase torque at the expense of reducing rpm using a gear box.
 
After looking for a servo motor I believed I found exactly what I needed. To be honest I was looking for micro servo motors (I had never heard about these). Basically I didn't need much rpm ( I didn't need it fast) I just needed it to be very very small in length width and height as I need to compact all of it as much as possible. I will continue researching the micro servo motors. I believe it is what I need. Thank you.
 
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