speed control of toy train.

[neiji]

I would like to maintain the speed of 3-6V toy train. that is, the speed of a straight

path should be maintained along a circular path (the train has a slower speed in

circular track) and when the train is started in a circular path, it has the speed of the

straight path. the circuit I require more probably maintain the output voltage to be the

same in whatever situation.

A detailed explanation would be useful.

thanks

 

[A.Anand Srinivasan]

what is the voltage that you require... why dont u try a voltage regulator to that particular voltage....

 

[Moustache]

Hi,

maby you can use better a current regulation.

Moustache

 

[sahn001]

Hi,
You may need to control the current flowing through a motor.
Simply you can check using a shunt register and comparator with driving transistors.
The voltage out from the series shunt registor will be compared with a reference voltage you set for the speed, and the comparator signal will control the driving transistors.
Once the speed is reduced at the corner, the current flow through the motor will also be decreased.
This will lower the voltage drop across the series shunt and will trigger the comparator to boost up the current into the motor.

Added after 19 minutes:

Check this out
Just simple reference.

Steve AHN

Added after 1 minutes:

 

[nonot]

since it takes more energy to make the turn, you will probably need to implement some feedback between the angle of the train wheels and your controller.

 

[montri]

You may use feedback control to maintain the out put speed,( input parameter in voltage and current, out put parameter is speed).