I'm not sure if this has been discussed already or not. I did a search and the closest thing I found was a thread talking about reducing 12V to 6V with a 5amp current. In my case I have a 6VDC battery that is putting out 15A but I want to reduce it to about 7A while keeping the 6VDC. I'm actually fairly new at all of this. I guess I'll get into what I'm trying to do....
I have a high RPM DC motor that runs off of 4 D cell batteries. I actually run this motor quite often and constantly buying 4 D cell batteries is getting a bit costly. I initially tried getting 4 rechargeable D batteries but couldn't find any in my area. I went to the near by city and found rechargeable D cell's but no charger. So then I decided to try and hook up this motor to a AC/DC converter. I was using a 2A converter that allowed you to select between 1.5V to 12V. The converter barely spun the motor at all. I then tested the motor with the 4D batteries with a multimeter and found out that it was using about 4.5A at peak spin with an initial draw of 7A to get it started. So I set out to buy a 6V R/C Car battery figuring it'd give me the amperage I needed and it came with a charger for a fairly cheap price. Only problem now is when I hooked it up, the motor spun extremely fast and started burning up (got really hot and started putting off a smell). I tested the R/C battery to find it's putting out 15A opposed to the 7.5A the D batteries put out (7.5A is a single D battery, with 4 tied in a series it put out 4.5-5A). How can I reduce the 15A to around 5-7A and keep the 6V output?
Also I don't know if I understand this completely but if I am, it's not exactly the voltage and amperage that matter but the power (wattage) that matters. So 6VDC at 7A is 42Watts, 6V at 15A is 90Watts. Would it be safe to say, even if I lost some voltage while reducing the amperage, as long as I still get 42Watts it'll work just fine?
I apologize for the extreme length of my post...
I have a high RPM DC motor that runs off of 4 D cell batteries. I actually run this motor quite often and constantly buying 4 D cell batteries is getting a bit costly. I initially tried getting 4 rechargeable D batteries but couldn't find any in my area. I went to the near by city and found rechargeable D cell's but no charger. So then I decided to try and hook up this motor to a AC/DC converter. I was using a 2A converter that allowed you to select between 1.5V to 12V. The converter barely spun the motor at all. I then tested the motor with the 4D batteries with a multimeter and found out that it was using about 4.5A at peak spin with an initial draw of 7A to get it started. So I set out to buy a 6V R/C Car battery figuring it'd give me the amperage I needed and it came with a charger for a fairly cheap price. Only problem now is when I hooked it up, the motor spun extremely fast and started burning up (got really hot and started putting off a smell). I tested the R/C battery to find it's putting out 15A opposed to the 7.5A the D batteries put out (7.5A is a single D battery, with 4 tied in a series it put out 4.5-5A). How can I reduce the 15A to around 5-7A and keep the 6V output?
Also I don't know if I understand this completely but if I am, it's not exactly the voltage and amperage that matter but the power (wattage) that matters. So 6VDC at 7A is 42Watts, 6V at 15A is 90Watts. Would it be safe to say, even if I lost some voltage while reducing the amperage, as long as I still get 42Watts it'll work just fine?
I apologize for the extreme length of my post...