Help, don't know what kind of battery to use

[Doc Sprocket]

To my knowledge, there is NO alternator that you can use as a motor.

If you are dead lucky, you might be able to use an old automotive generator. These were used before alternators were invented. No telling if it would have enough power. I doubt it. Pretty hard to find, and not even worth pursuing IMHO.

 

[landuse]

Here is a thread about using a starter motor as a electric motor. I am not too sure how well it would work though

http://www.diygokarts.com/engine/car-starter-motor-conversion.html

 

[hardrock21]

No go on using an alternator for a motor. You can use a motor for a make shift generator though with no voltage regulation, ironically.

Paul

 

[nileshc]

But I heard that starters can't be used continually, only for short period of time

 

[Doc Sprocket]

But I heard that starters can't be used continually, only for short period of time

They do have a tendency to get hot. If you can engineer a reliable cooling method, you may be okay. It would be difficult though. They have no heat sinks vents or fan.

 

[nileshc]

I found a 24 volt motor with 36 amps. Each battery is 6 volts and 12 amps. I have a circuit below. Will it work? ANother question, if I use a controller and its limit is 40 amps and motor's limit is 36 what will happen? Can you over amp a motor?

 

[devino246]

I found a 24 volt motor with 36 amps. Each battery is 6 volts and 12 amps. I have a circuit below. Will it work?View attachment 35070 ANother question, if I use a controller and its limit is 40 amps and motor's limit is 36 what will happen? Can you over amp a motor?

Overamping isn't possible. Voltage pushes, amperage is pulled.

 

[nileshc]

I am really confused about amps. How does it effect speed, how long it lasts, etc...

 

[hardrock21]

Overamping isn't possible. Voltage pushes, amperage is pulled.

Exactly. Amps are a measure of current required by a load, so you can't force it to take more amperage then it needs.

 

[nileshc]

What happens to a motor if you have less amps or more

 

[hardrock21]

I am really confused about amps. How does it effect speed, how long it lasts, etc...

You are comparing 2 different units of measure when relating amps to a motor and to a battery. One is a load and the other is the supply. Battery output is measured in amp/hours, not just amps. Motors draw amperage, so they are two different things. Amps don't regulate speed, nor do they effect how long it lasts.

 

[hardrock21]

What happens to a motor if you have less amps or more

Again, a motor is going to draw only the amperage it needs, you don't need to worry about over/under amping the motor. Amperage is current. You are probably thinking about voltage which is the supply, you can definitely over-volt and under-volt a load, both of which can burn up a load if it's excessive in either direction.

 

[nileshc]

I was trying to say amp/hours. If a battery to have more amp/hours or less, then how does it effect the motor

 

[hardrock21]

I was trying to say amp/hours. If a battery to have more amp/hours or less, then how does it effect the motor

More amp/hours will run the motor for a longer period of time, less amp/hours won't run the motor as long.

Paul

 

[nileshc]

Will amps add up when if have one battery in parllel and 4 batteries in series.
Each battery has 18 amp hours. what amps will the motor get?

 

[Doc Sprocket]

Series- Add voltage. Parallel- add current.

 

[nileshc]

But will amps from a series circuit add to a parallel circuit. I have a a picture of my circuit a few post ago. Can someone tell me if the total output could be 36 amps

 

[hardrock21]

But will amps from a series circuit add to a parallel circuit. I have a a picture of my circuit a few post ago. Can someone tell me if the total output could be 36 amps

I'm trying to figure out what you are doing exactly. Why are you wanting to make a hybrid parallel/series circuit? Also, remember Amp/hour ratings are for a 20 hour period so trying to get the a/h to be the same as the amp rating of the motor doesn't make sense. Ideally, you would would want substantially more then 36ah worth of batteries to power a 36 amp motor.

Paul

 

[nileshc]

Oops, I forgot that it was in amp/hour. What happens if the motor is rated at 36 amps and I only have 1.8 amps to give from the battery?

 

[Doc Sprocket]

Then you don't move.