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# How much torque is required of DC motor to move vehicle? Answered

my motor specification is power=500 W, RPM =2500, motor torque = 1.91 Nm, drive sprocket is 16 teeth, driven sprocket is 43 teeth , gear ratio is 2.38, diameter of wheel is 26 inch. i would like to move a vehicle of weight 150 kg with the speed 10 kmph. what would i do ?

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## 6 Replies

rickharris (author)2017-05-27

Gear the motor down by 25:1 or so - with your large wheels you may even need to go higher say 70:1 as your target speed is so low. some experimentation is inevitable.

https://www.instructables.com/id/Building-an-elect...

jpthermalpower (author)2017-05-29

sir speed is not a problem. i want my vehicle to run with the load 150 kg.

rickharris (author)2017-05-29

To efficiently use the torque of the motor you need to gear it down.

Now I don't understand you question.

You need to gear the 250 rpm motor down to some suitable level.

You have plenty of power to move the `150KG the electric car I linked to weighed around that and would do 30 MPH (50KPH)

If you need to go up hills then the speed will drop.

Your 7 Amphr battery will last approx 20 mins if you draw 20 amps.

rickharris (author)2017-05-29

By the way your question as such has a lot of variables you don't know,

The vehicle drag

the rolling resistance