Electrical components of a kids electric car

[matt_65]

Hi, I am looking to build a small electric car for the kids and am interested in finding out what components I would require, I am looking for a list of the type of items I should be researching further.

I am thinking of building a 24v system, using something like old mobility scooter motors (one motor on each of the rear wheels). I was also thinking of using a pedal that the kids press down to drive the car, and perhaps a switch to put the motor into reverse (if it isnt too difficult). I am wanting the car to be as fast as a fast walk (say 10-15 km/h), and have enough battery life for at least 30 mins of constant use.

So I know that I will require two motors, and some batteries, can anyone provide me with some further pointers on the components I should be looking for?

Should I have a PWM to allow the variable speed and reduce some heat to the motor or should I leave the speed to a switch under the pedal?

Is there any websites that can provide me with some further information? I have tried a google search and most results are trying to sell me the cars and not explaining how to build one.

Any help from the community is greatly appreciated.


Matt

 

[john blue]

Should I have a PWM to allow the variable speed and reduce some heat to the motor or should I leave the speed to a switch under the pedal? PWM would be a better choice.

---------- Post added at 05:15 ---------- Previous post was at 05:10 ----------

PWM generation
Use microcontroller:**broken link removed**
Use Timer:PWM using 555. - Jose Pino's Projects and Tidbits.

More on PWM: Introduction to Pulse Width Modulation (PWM) | Netrino

---------- Post added at 05:17 ---------- Previous post was at 05:15 ----------

**broken link removed** -> Motor driver

 

[matt_65]

Thanks John, I notice the H-Bride link you sent is for a 12v motor, would this circuit be able to supply power to a 24v motor, or should I be looking for a 12v motor instead? I am not attempting to break any land-speed records and only speified the 24v motor as that is what I found more inforamtion on in my earlier stages of research.

Thanks heaps for those links, I will check them out and hopefully they will get me pointed in the right direction.

Matt

 

[john blue]

you can have 24V motor, just need to find the right MOSFET on the H - bridge

 

[srizbf]

since it is a kids car , can an electric scooter be modified for a car?
with minimal modification , kids car will be ready(!)
just my thinking(or idea?)

 

[john blue]

Yup. Sure. Why not?