Reduce RPM of 12V 0.66A D.C Motor from 60 to 30

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Discussion Overview

The discussion revolves around methods to reduce the RPM of a 12V, 0.66A DC motor from 60 to 30 RPM. It explores various approaches including voltage control, PWM (Pulse Width Modulation), and gearing options.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant suggests that controlling the voltage supplied to the motor may or may not allow for speed control, indicating the need to investigate the motor's characteristics.
  • Another participant proposes using gears as an alternative method to reduce RPM if voltage control is not feasible.
  • A participant mentions that if maintaining good torque at half-speed is desired, using PWM on the 12V supply would be necessary.
  • There is a reiteration that both PWM and gearing are viable methods for achieving the desired RPM reduction.

Areas of Agreement / Disagreement

Participants express multiple competing views on the best method to reduce RPM, with no consensus on a single approach. Some advocate for PWM while others suggest gearing, and the effectiveness of voltage control remains uncertain.

Contextual Notes

The discussion does not resolve the assumptions regarding the motor's compatibility with voltage control or the specific requirements for maintaining torque while reducing speed.

Arun Sarkar
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I have a 12V, 066A D.C motor, and 60 RPM. Want to reduce the RPM (60 to 30.
What should I need to do?
 
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The electric motor may, or may not, allow you to control the speed by controlling the volts supplied. Some motors allow this, some do not. You will have to investigate the nature of your electric motor to determine this. Then if the motor does allow this, can you supply different voltages?

If not, then could you use gears?
 
If he still wants good torque at half-speed, he would need to use PWM on his 12V supply, no?
 
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berkeman said:
If he still wants good torque at half-speed, he would need to use PWM on his 12V supply, no?

yup, that or gearing will be the 2 successful ways

here's some good examples from eBay ...
http://www.ebay.com/bhp/pwm-controllerDave
 

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