Bye Bye SADS

[ClintJ]

Well I havent been on for a while.. Been running around getting things ready. Some those things include making the SADS or auxilary drive shaft go bye bye.





What you can see here is my aquired 36V permanent magnet 3/4HP electric motor. It is sitting in the place where the alternator would normally sit.

It isnt mounted yet of course but I had the first ring for the timing belt machined off the main pulley that was driven by the auxilary drive shaft.
With the shaft disconnected the elctric motor will drive the power steering pump and the aircon. I plan on having 2 power settings on the electric motor so that when the aircon isnt running that the electric motor would only be turning fast enough to run the power steering pump.

Why would I be possessed to go this far as to removing the shaft???
Ive already changed the couplings once in 1 year. They are absolute crap.. With the shaft disconnected, I found the engine idled so smoothly.

Running the electric motor at a reduced speed to engine rpm means that it is more economical. I will use one of the guide bearings from the 3CTE that keeps the timing belt in place.
If anybody hasnt noticed. The 2 pulleys are actually 3CTE fuel pump pulleys.

The plan will be to run 2 alternators off the engine. 1 to produce the 36+Volts dc to run the dc motor and the other to run the cars electrics..

A cars alternator can be modified to produce a higher voltage. Its just normally limited to only produce just under 14V for the cars ancilleries.

The DC motor will turn 2050rpm at 36Vdc. Thats 57rpm/volt. So if I wanted 3000rpm I need 3000/57 which equals 53Volts roughly.
the dc motor is rated to 19amps continuous.

lets see how the alternator will handle this... I figured although they rate the alternator in amps it is still power that is the limiting factor.
So a 100amp alternator at 13.8V is rated at
13.8V X 100Amps=1380watts

If I want to run the motor to 53V to get my 3000rpm the the alternator will need to produce this much power ie
53V X 19Amps = 1007Watts EASY! with room to spare
I also plan to run a much bigger alternator for the van. There are 200amp units available from the states for about $300USD delivered to aus or about $360AUD. Cant find a 200amp alternator here for less than $500~600AUD

[monsigna]

WELL!!!!! good luck with the project.....please keep us informed as to how it goes.

ade

[mr mince]

Good luck, could do with you on this side of the world though

[buffallobob]

I dont wish to poor cold water on this and if it works great but when i was at college we tried to run a motor from a battery, the motor would run an alternator which in turn would charge the battery (perpetual motion and it does not work ) now i hope that technology has moved on but surley we would have electric cars on the road now that would run like this if it would work A battery running a motor that runs the car and an alternator that charges the battery so no need to plug it in at night
bob

[ClintJ]

Originally Posted by buffallobob

I dont wish to poor cold water on this and if it works great but when i was at college we tried to run a motor from a battery, the motor would run an alternator which in turn would charge the battery (perpetual motion and it does not work ) now i hope that technology has moved on but surley we would have electric cars on the road now that would run like this if it would work A battery running a motor that runs the car and an alternator that charges the battery so no need to plug it in at night
bob

Im not chasing perpetual motion. 1 alternator charges the cars normal 12V battery. The other alternator runs the dc motor which runs the aircon and power steering pump.
All Im doing is getting rid of the heavy shaft that constantly needs attention..
If I set it up to sense when the steering is turned then the pump/dc motor can be turned off when your travelling in a straight line like on a freeway.
Lighter rotational mass would mean less fuel required to turn it faster.

The reason why perpetual motion doesnt work electrically is that there are too many losses from poor efficiency. Not unless your talking superconducters.
You cant get something from nothing

[Blobby]

Doesn't Honda have electric power steering pumps on some of their cars.
That way all you'll need a motor for is the air con, or you could even try and mount that in place of the 2nd alternator.

[Timberwolf]

I love reading your posts Clintj.......but you always lose me after the first paragraph..........Anyway I'm sure one day someone will be talking about alternators and I will suddenly say with out thinking....

....."If I want to run the motor to 53V to get my 3000rpm the the alternator will need to produce this much power ie
53V X 19Amps = 1007Watts EASY! with room to spare"

and they will look at me with wonder.......as though they really might think I understand one word of what I just said......................

[Blobby]

Originally Posted by Timberwolf

I love reading your posts Clintj.......but you always lose me after the first paragraph..........Anyway I'm sure one day someone will be talking about alternators and I will suddenly say with out thinking....

....."If I want to run the motor to 53V to get my 3000rpm the the alternator will need to produce this much power ie
53V X 19Amps = 1007Watts EASY! with room to spare"

and they will look at me with wonder.......as though they really might think I understand one word of what I just said......................

Thing is Timberwolf I understand it, but I couldn't think of adding petrol to my 1 litre veg bottles to flush them out.

[Timberwolf]

Originally Posted by Blobby

Thing is Timberwolf I understand it, but I couldn't think of adding petrol to my 1 litre veg bottles to flush them out.

See me and you could have the perfect marriage......you deal with the fancy stuff and I'll take care of the Bleedin obvious.......................Did I ever tell you I love the way the moonlight reflects off your forum postings.....

[mr mince]

Originally Posted by Blobby

Doesn't Honda have electric power steering pumps on some of their cars.
That way all you'll need a motor for is the air con, or you could even try and mount that in place of the 2nd alternator.

I'm sure I just seen BMW bragging about it recently too.

You still reckon you'll get the bus economy up to 5 litres/100km Clint?
Must be getting close now