Low RPM, High Torque on dry cell batteries

In summary, the conversation discusses the approximate size of a gear system and motor needed for a rotation per minute of 1rpm with a torque of 0.6nm, using dry cell batteries. The power required can be calculated using P = Tω and potential options for motors and gear systems include Tamiya motors, Pololu metal gearmotors, rotary encoders, and stepper motors. The final decision depends on the specific design needs.
  • #1
D4ns4lmon
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Hello, Apologies I am not an engineer. I am hoping to find the approximate size of a system that rotates at a torque of 0.6nm but a rotation per minute of 1rpm. Ideally this would run off of dry cell batteries (e.g. 6xAA). Roughly how big would the gear system be to drop the RPM for this? How big would the motor be? Can you recommend any particular motor/gear system that would get the job done? Will dry cell batteries be sufficient? Any help at all in any of these questions would be greatly appreciated.
Thanks!
 
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  • #2
You can calculate the power required from the motor via:

P = Tω
Power (Watts) = Torque (Nm) * angular velocity (radians/s)

(Google how to convert rpm to rad/s)

If this is a one off project one of, or a combination of a couple of these may work:
https://www.pololu.com/category/34/tamiya-motors-and-gearboxes
https://www.pololu.com/category/51/pololu-metal-gearmotors

Or you may need a rotary encoder.
http://en.wikipedia.org/wiki/Rotary_encoder

Or a stepper motor (and maybe a small, single stage gear box) may be better.
http://en.wikipedia.org/wiki/Stepper_motor

It all depends on what your design needs to do.
 
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  • #3
That's brilliant Billy_joule, thank you so much for your prompt and helpful reply! The links are really useful and will definitely get me started. Thanks so much for your help!
 

1. What is low RPM, high torque on dry cell batteries?

Low RPM, high torque on dry cell batteries refers to the ability of the battery to maintain a high level of torque, or rotational force, at low speeds. This is typically seen in applications where a steady, consistent level of power is needed, such as in electric vehicles or power tools.

2. How do dry cell batteries achieve low RPM, high torque?

Dry cell batteries achieve low RPM, high torque by using a combination of chemical reactions and mechanical design. The chemical reactions within the battery produce a steady flow of electricity, while the mechanical design allows for the conversion of this electricity into rotational force at low speeds.

3. What are the advantages of low RPM, high torque on dry cell batteries?

The main advantage of low RPM, high torque on dry cell batteries is their ability to provide consistent, reliable power at low speeds. This makes them ideal for applications where a constant level of torque is needed, such as in electric vehicles or power tools. Additionally, these batteries are typically more durable and have a longer lifespan compared to other battery types.

4. Are there any limitations to low RPM, high torque on dry cell batteries?

One limitation of low RPM, high torque on dry cell batteries is their lower energy density compared to other battery types. This means that they may not be suitable for applications where a high amount of energy is needed in a short amount of time, such as in high-speed vehicles. Additionally, they may have a slower recharge time compared to other battery types.

5. Can low RPM, high torque on dry cell batteries be used in all types of devices?

No, low RPM, high torque on dry cell batteries are best suited for applications where a steady, consistent level of power is needed at low speeds. They may not be suitable for devices that require a high amount of energy in a short amount of time, such as smartphones or laptops. It is important to consider the specific needs of a device before choosing a battery type.

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