DC motor speed controller wanted

[96terrano]

does anyone here know where i could get a speed controller for a DC motor? im building a little generator project and a need to bring the speed of the motor up gradually so the belt going to the T2 alternator doesn't slip....if you know what i mean

the motor im using is a 14.4v drill motor but i'll be using a 12v lead acid battery you find in alarm panels

also, does anyone know the rpm that a terrano diesel alternators needs to be spinning at to turn out the excitation lamp and start generating a charge?

[96terrano]

Originally Posted by 96terrano

does anyone here know where i could get a speed controller for a DC motor? im building a little generator project and a need to bring the speed of the motor up gradually so the belt going to the T2 alternator doesn't slip....if you know what i mean

the motor im using is a 14.4v drill motor but i'll be using a 12v lead acid battery you find in alarm panels

also, does anyone know the rpm that a terrano diesel alternator needs to be spinning at to turn out the excitation lamp and start generating a charge?

[96terrano]

im guessing no body knows think iv'e found something on eBay

[SPARKIEDOO]

Originally Posted by 96terrano

does anyone here know where i could get a speed controller for a DC motor? im building a little generator project and a need to bring the speed of the motor up gradually so the belt going to the T2 alternator doesn't slip....if you know what i mean

the motor im using is a 14.4v drill motor but i'll be using a 12v lead acid battery you find in alarm panels

also, does anyone know the rpm that a terrano diesel alternators needs to be spinning at to turn out the excitation lamp and start generating a charge?

sorry mate but you will need a hole lot of electronics....diode pack / modulator...the list is endless you would be cheaper buying somthing from FLEABAY

[96terrano]

Originally Posted by SPARKIEDOO

sorry mate but you will need a hole lot of electronics....diode pack / modulator...the list is endless you would be cheaper buying somthing from FLEABAY

yes, i melted a dimmer switch from a Terrano, when trying to make a speed controler

[96terrano]

this should do

http://www.ebay.co.uk/itm/12V-40V-10...item43b13822cf

[(RIP) PLANK]

Are you driving the drill motor and producing power that way?

Could you use a speed controller from a drill to do the job?

[Lazy-Ferret]

Not sure 10amps will be enough, if I was you, I would try it first with an electric drill, and see if you have enough torque and speed to drive the alternator under load.

The thing is, the alternator has a built in regulator, allowing it to output the same voltage regardless of how fast the engine is running, so I do not understand why you need to vary the speed of the drive motor, you would just be better starting the engine with no load on the alternator, then switching the load on once it is up to speed.

You could look for an old electric variable speed drill, and use the controller out of that.

[Lazy-Ferret]

I do have another question...

If you have a charged 12v battery to run the motor, why do you need to generate 12v?

[96terrano]

cheers, yeah, the drill the motor came out had a burnt out controller, hence the reason the drill was scraped, i thought a controller would be good as if the motor is just powered directly off the battery, itll wear the belts as it'll be spinning a lot until the alt catches up on the motor, thus creating wear on the drive belt

[briggie]

thats how i learnt electronics , by pulling old tv's and radios to bits , and getting a fair few belts from the final anode too , oh what fun

sometimes they still worked when i rebuilt them too

[96terrano]

Originally Posted by briggie

thats how i learnt electronics , by pulling old tv's and radios to bits , and getting a fair few belts from the final anode too , oh what fun

sometimes they still worked when i rebuilt them too

I've had a few burns off the flybacks out of tvs