make a dc motor giving high torque as well as high speed

[[email protected]]

resppected sir,
i have the 500rpm geared dc motor but it will
not give me the enough torque so how i convert my motor to give high
speed as well as high torque simultanously

 

[donald]

resppected sir,
i have the 500rpm geared dc motor but it will
not give me the enough torque so how i convert my motor to give high
speed as well as high torque simultanously

Buy a new motor.

 

[James Arthur]

Buy a new motor.

A bigger one.

Cheers,
James Arthur

 

[BobG]

Measure the unloaded RPM and the stall current. The motor is designed
to run at about half that speed and half that current. Compute the
watts. You can run the motor from twice as high a voltage if you
restrict the duty cycle to about 25% and keep same average thermal
wattage flowing from the case.

 

[Tim Wescott]

resppected sir,
i have the 500rpm geared dc motor but it will
not give me the enough torque so how i convert my motor to give high
speed as well as high torque simultanously

The motor is going to deliver torque that's more or less proportional to
the input current, and speed that's more or less proportional to the
input voltage.

Giving the motor more than its rated continuous current will burn out the
coils or the armature. Running the motor at higher than its rated speed
will lead to accelerated wear on its bearings, or in extreme cases will
blow the armature apart from centripetal effects. Running the _gearbox_
at higher that _its_ rated input speed will cause problems, and gearboxes
usually aren't rated as high as motors.

If you're not getting the power you need out of the motor its either
because you're not using the motor right or you need a bigger motor. If
your desired speed out of the gearbox comes when you're running the motor
quite a bit slower than maximum, then you need a different gearbox. If
your desired speed is close to the motor's maximum, and you're running
flat out with your current input, you need a different motor.

--
Tim Wescott
Control systems and communications consulting
http://www.wescottdesign.com

Need to learn how to apply control theory in your embedded system?
"Applied Control Theory for Embedded Systems" by Tim Wescott
Elsevier/Newnes, http://www.wescottdesign.com/actfes/actfes.html

 

[Tom Bruhns]

Measure the unloaded RPM and the stall current. The motor is designed
to run at about half that speed and half that current.

....

Say wha???

(Maybe you should qualify that with the type of DC motor you're
thinking about. It's most certainly not true in general.)