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### Topic: Choosing a DC motor (Read 930 times)previous topic - next topic

#### canemichael97

##### Apr 22, 2014, 04:38 pm
Hi, I am planning on doing a new project (not sure what yet) involving DC motors.  I was wondering if anyone on here had any good links or other information on where to start and how to choose a DC motor.  Mainly focusing on things like how much mass would the motor be able to move and at what speed.  I appreciate any information you may have to help.
Thanks

#### Robin2

#1
##### Apr 22, 2014, 06:36 pm
You need to define your requirements first and then it should be easy to find a suitable motor.

...R
Two or three hours spent thinking and reading documentation solves most programming problems.

#### canemichael97

#2
##### Apr 22, 2014, 07:40 pm
I am thinking on making a RC buggie/truck so need a motor to drive the truck but also thinking of some sort of a robotic arm or simmilar on the back so would need motors/servos for that also

#### canemichael97

#3
##### Apr 22, 2014, 08:12 pm
Is there a formula to put torque e.t.c in to get the information i would need such as RPM and how much mass it could move?

#### Robin2

#4
##### Apr 22, 2014, 11:51 pm
When I said "define your requirements" I meant that you need to work out the speed and torque requirements for the project that requires the motor. Finding a motor first is putting the cart before the horse. Motors come in all sizes - some drive wrist watches and some drive trains. Something in between will probably work for your project.

...R
Two or three hours spent thinking and reading documentation solves most programming problems.

#### MarkT

#5
##### Apr 23, 2014, 02:41 am
Power in = voltage x current.

Power out = torque x angular velocity

Power out = efficiency x power in

Torque = motor torque constant x current - frictional loss
[ I will NOT respond to personal messages, I WILL delete them, use the forum please ]

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