On another thread I have shown the reverse EMF produced by a DC motor running on PWM speed control.
I showed traces of the voltage across the motor terminals with a standard flywheel or flyback diode, a Schottky diode, and with no diode at all. That's the trace I want to discuss, so I'll post it here as well ...
The project I am working on is battery powered, and a design brief was to make it as efficient as possible, extending battery life.
The thought has occurred to me that it ought to be possible to capture the energy in that reverse EMF (when the motor switches off), and put it back into the battery, instead of just throwing it away (presumably as heat into the motor windings).
Does anyone know if that is at all possible, and suggest a way to do it ....
TIA
I showed traces of the voltage across the motor terminals with a standard flywheel or flyback diode, a Schottky diode, and with no diode at all. That's the trace I want to discuss, so I'll post it here as well ...
The project I am working on is battery powered, and a design brief was to make it as efficient as possible, extending battery life.
The thought has occurred to me that it ought to be possible to capture the energy in that reverse EMF (when the motor switches off), and put it back into the battery, instead of just throwing it away (presumably as heat into the motor windings).
Does anyone know if that is at all possible, and suggest a way to do it ....
TIA