I've been asked if i could explain the braking principle in a DC motor a little better.
I'm not gonna use North and South designations as it doesn't really apply for this simple explanation
Basically a slotcar has 2 motor mags that have a pulling and pushing side to the magnet,in correlation to the direction of flow of electricity through the arm.
When you apply power to move the car down the track,the flow of electricity is one way,when you apply a brake circuit or short circuit across the motors terminals,you basically turn the car into a generator,and it creates it's own internal electricity,"But" this flow of electricity is in reverse to the flow of electricity needed to make the car move forwards.
So now you've flipped the electrical flow path a 180,and what was positive is now negative,and what was negative is now positive.
What this basically does is make the poles reverse charged,and when you reverse the poles charge,the pulling and pushing side of an electrical field flipps.
But the car is still rolling forwards down the track,turning the arm,but it is now forcing the electrical field to run through the magnet field backwards to what it wants,because it's own internal electricity is flowing in reverse to what the car wants to continue forward.
So now as the poles of the arm enter the magnet field instead of being attracted to the magnet,they are repelled by the magnet,and as the poles leave the magnet field ,instead of the magnet pushing the pole away from itself,it is now trying to draw the pole backwards towards itself,applying a reverse torque to the arm.
The heat is generated because the magnet and electrical field create a pile of friction as they try to cross each other in reverse of what they want.
Hope that helps somewhat,it's a pretty simplistic description of the braking principle,but i hope it helps guys understand the principle a little better
I'm not gonna use North and South designations as it doesn't really apply for this simple explanation
Basically a slotcar has 2 motor mags that have a pulling and pushing side to the magnet,in correlation to the direction of flow of electricity through the arm.
When you apply power to move the car down the track,the flow of electricity is one way,when you apply a brake circuit or short circuit across the motors terminals,you basically turn the car into a generator,and it creates it's own internal electricity,"But" this flow of electricity is in reverse to the flow of electricity needed to make the car move forwards.
So now you've flipped the electrical flow path a 180,and what was positive is now negative,and what was negative is now positive.
What this basically does is make the poles reverse charged,and when you reverse the poles charge,the pulling and pushing side of an electrical field flipps.
But the car is still rolling forwards down the track,turning the arm,but it is now forcing the electrical field to run through the magnet field backwards to what it wants,because it's own internal electricity is flowing in reverse to what the car wants to continue forward.
So now as the poles of the arm enter the magnet field instead of being attracted to the magnet,they are repelled by the magnet,and as the poles leave the magnet field ,instead of the magnet pushing the pole away from itself,it is now trying to draw the pole backwards towards itself,applying a reverse torque to the arm.
The heat is generated because the magnet and electrical field create a pile of friction as they try to cross each other in reverse of what they want.
Hope that helps somewhat,it's a pretty simplistic description of the braking principle,but i hope it helps guys understand the principle a little better