Hi,
I'm working on a artistic project which involves solar energy. They asked me to find a solution to run from a couple small solar cells a small low voltage dc Motor (product page).
I managed to run the motor directly from 15 solar cells in parallel. This gave me enough current to start the motor, but 15 cells are to many for our project, and we need a lot of light. When it's cloudy we need to start the motor manually, sometimes it doesn't start at all.
As I understood motors need enough current (A) to start, and in a certain way voltages (V) would set the speed (rpm).
I have found some interesting solutions with B.E.A.M. bots. The B.E.A.M circuits allowed us to get a burst of energy discharged after being stored in a capacitor. Since we need constant motion, even very slow, this didn't fit to our requirements.
Another solution, which is more appropriate, would have been to make something similar found in solar pumps. Solar pumps are active at slow speeds very early and very late in the day, running at full speed in full daylight. All the circuits designs I've found are for much higher voltages than what we need for our project. I believe, correct me if I'm wrong, such circuits are called "Buck converters" ?
In practice I need to find a way on how to decrease voltage and increase current so that i can have enough current to start the motor in dim light, and run it even at very slow speed.
Do you know any schematic design that would help me in this project? Or could you maybe point me in the right direction? Any hint?
Your help is very much appreciated!
I'm working on a artistic project which involves solar energy. They asked me to find a solution to run from a couple small solar cells a small low voltage dc Motor (product page).
I managed to run the motor directly from 15 solar cells in parallel. This gave me enough current to start the motor, but 15 cells are to many for our project, and we need a lot of light. When it's cloudy we need to start the motor manually, sometimes it doesn't start at all.
As I understood motors need enough current (A) to start, and in a certain way voltages (V) would set the speed (rpm).
I have found some interesting solutions with B.E.A.M. bots. The B.E.A.M circuits allowed us to get a burst of energy discharged after being stored in a capacitor. Since we need constant motion, even very slow, this didn't fit to our requirements.
Another solution, which is more appropriate, would have been to make something similar found in solar pumps. Solar pumps are active at slow speeds very early and very late in the day, running at full speed in full daylight. All the circuits designs I've found are for much higher voltages than what we need for our project. I believe, correct me if I'm wrong, such circuits are called "Buck converters" ?
In practice I need to find a way on how to decrease voltage and increase current so that i can have enough current to start the motor in dim light, and run it even at very slow speed.
Do you know any schematic design that would help me in this project? Or could you maybe point me in the right direction? Any hint?
Your help is very much appreciated!