DC motor speed controller wanted

96terrano · 09-11-2012, 19:17

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 · 09-11-2012, 19:26

Quote:

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 · 09-11-2012, 20:46

im guessing no body knows

think iv'e found something on eBay

SPARKIEDOO · 09-11-2012, 20:58

Quote:

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 · 09-11-2012, 21:01

Quote:

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 · 09-11-2012, 21:02

this should do

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

(RIP) PLANK · 09-11-2012, 21:30

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 · 09-11-2012, 21:34

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 · 09-11-2012, 21:36

I do have another question...

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

96terrano · 09-11-2012, 21:41

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

Thomas-the-Terrano2 · 09-11-2012, 23:23

what rating, how about one from a model train controller

(RIP) PLANK · 09-11-2012, 23:28

idea: a bit of a tangent but try searching 'dynamo' ike an altenator but with a DC output.

(RIP) PLANK · 09-11-2012, 23:31

back on track:have you considered the gearing? the pulley sizes will make a huge difference to the relative rotation speeds!

solarman216 · 09-11-2012, 23:36

strange one this!! you have a 12 v battery to drive a 14.4 volt drill that will drive a T2 alternator with slipping belts, and you want a controller to limit the slip, and just what are you going to do with the alternator output? charge the battery running the drill? perpetual motion comes to mind, Rick

rustic · 09-11-2012, 23:40

Why oh why are you doing this

Using 12 volts to drive a motor to drive a generator to charge a 12 volt battery

Are you trying to get more out than you are putting in?

If you could do that you will be a millionaire overnight, and the oil industry would collapse too.

I am totally confused

I noticed the first post, checked the date and since it wasn't April 1st, I thought I would wait a while before putting my two pennyworth in.

Have I missed something

Best regards, Rustic

09-11-2012, 19:17	#1
96terrano Senior Member Join Date: Jun 2010 Location: Dumfries and Galloway, Scotland Vehicle: Nissan Terrano 2.7TD LWB Posts: 8,024	DC motor speed controller wanted 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?

09-11-2012, 23:23	#11
Thomas-the-Terrano2 Moderator Join Date: Dec 2004 Location: Hackenthorpe Sheffield Vehicle: Terrano2 R20 lwb 2.7TDi Posts: 5,234	what rating, how about one from a model train controller __________________ M6YTB / 20YTB '60' 2010 Ford C Max Zetec 1.6i, black '56' 2006 Jeep Grand Cherokee 3.0TD, silver 2021 Bailey Pegasus Grade SE Turin caravan Smile, its more likely to confuse. One Life, Don't Just Live It, Drive a Nissan, or ...... a Jeep. Owner of Nissan 4x4s 2005 to 2019, and maybe in the future too!

09-11-2012, 23:36	#14
solarman216 Off road maniac Join Date: Dec 2009 Location: Bexhill on Sea Vehicle: Y60 Patrol Me, 3 ltr Mrs Posts: 17,431	strange one this!! you have a 12 v battery to drive a 14.4 volt drill that will drive a T2 alternator with slipping belts, and you want a controller to limit the slip, and just what are you going to do with the alternator output? charge the battery running the drill? perpetual motion comes to mind, Rick __________________ Ex banger racer now off road maniac Lokka on the front with manual hubs Diff lock on rear 3 inch SS straight through exhaust Manly winch bumper with 13000 lb winch 10 spike ground anchor, with multiple straps and blocks Super strong body cills capped with scaffold pole 20% stronger springs all round aggressive off road tyres on wheels so just swap. Aim to get stuck and be completely self sufficient in extraction, love getting muddy, 2ft deep is good but rare.

09-11-2012, 23:40	#15
rustic Senior Member Join Date: Feb 2007 Location: Staffordshire Vehicle: Maverick Mk I 2.7 TD LWB Posts: 7,825	Why oh why are you doing this Using 12 volts to drive a motor to drive a generator to charge a 12 volt battery Are you trying to get more out than you are putting in? If you could do that you will be a millionaire overnight, and the oil industry would collapse too. I am totally confused I noticed the first post, checked the date and since it wasn't April 1st, I thought I would wait a while before putting my two pennyworth in. Have I missed something Best regards, Rustic __________________ Ford Maverick GLX 1995 2.7TD LWB in illusion silver, 98k miles. Owned since new, for 22 years. Best car I have ever owned. Just wish I could drive it more.

09-11-2012, 20:46	#3
96terrano Senior Member Join Date: Jun 2010 Location: Dumfries and Galloway, Scotland Vehicle: Nissan Terrano 2.7TD LWB Posts: 8,024	im guessing no body knows think iv'e found something on eBay

09-11-2012, 21:02	#6
96terrano Senior Member Join Date: Jun 2010 Location: Dumfries and Galloway, Scotland Vehicle: Nissan Terrano 2.7TD LWB Posts: 8,024	this should do http://www.ebay.co.uk/itm/12V-40V-10...item43b13822cf

09-11-2012, 21:30	#7
(RIP) PLANK Senior Member Join Date: Mar 2006 Location: Central England, in the Heart of the Black Country Vehicle: T2 2004 TDI SE LWB Posts: 7,740	Are you driving the drill motor and producing power that way? Could you use a speed controller from a drill to do the job?

09-11-2012, 21:34	#8
Lazy-Ferret Senior Member Join Date: Jun 2012 Location: Sevenoaks, Kent Vehicle: Terrano 2.7TDi SE Touring Posts: 5,221	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.

09-11-2012, 21:36	#9
Lazy-Ferret Senior Member Join Date: Jun 2012 Location: Sevenoaks, Kent Vehicle: Terrano 2.7TDi SE Touring Posts: 5,221	I do have another question... If you have a charged 12v battery to run the motor, why do you need to generate 12v?

09-11-2012, 21:41	#10
96terrano Senior Member Join Date: Jun 2010 Location: Dumfries and Galloway, Scotland Vehicle: Nissan Terrano 2.7TD LWB Posts: 8,024	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

09-11-2012, 23:28	#12
(RIP) PLANK Senior Member Join Date: Mar 2006 Location: Central England, in the Heart of the Black Country Vehicle: T2 2004 TDI SE LWB Posts: 7,740	idea: a bit of a tangent but try searching 'dynamo' ike an altenator but with a DC output.

09-11-2012, 23:31	#13
(RIP) PLANK Senior Member Join Date: Mar 2006 Location: Central England, in the Heart of the Black Country Vehicle: T2 2004 TDI SE LWB Posts: 7,740	back on track:have you considered the gearing? the pulley sizes will make a huge difference to the relative rotation speeds!