How to control the speed of 1.5 Volt motor?

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SUMMARY

The discussion focuses on controlling the speed of 1.5 Volt DC brushed permanent magnet motors. Two primary methods are identified: reducing the voltage to 1V and using Pulse Width Modulation (PWM). PWM is favored as it effectively regulates speed without compromising torque, unlike rheostats or potentiometers, which limit current and reduce motor performance. Therefore, PWM is established as the optimal technique for speed control in these motors.

PREREQUISITES
  • Understanding of DC brushed permanent magnet motors
  • Knowledge of Pulse Width Modulation (PWM) techniques
  • Familiarity with voltage regulation methods
  • Basic electronics concepts, including current and torque
NEXT STEPS
  • Research how to implement Pulse Width Modulation for motor control
  • Explore voltage regulation techniques for DC motors
  • Learn about the characteristics of DC brushed permanent magnet motors
  • Investigate the limitations of rheostats and potentiometers in motor applications
USEFUL FOR

Electronics enthusiasts, hobbyists working with DC motors, and engineers involved in motor control applications will benefit from this discussion.

prasahant
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How to control the speed of 1.5 Volt motor?
 
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Most 1.5V motors are probably DC brushed permanent magnet motors. To control the speed you can either reduce the voltage (eg to 1V) or use Pulse Width Modulation (switch the 1.5V on and off rapidly so that the average voltage is less).
 
Rheostat (potentiometer)?
 
brainpushups said:
Rheostat (potentiometer)?

doesn't really work too well as it severely limits the current to the motor as well and it looses its torque power

That's why PWM is the best way to control the speed
 

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