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Re: 48V alternator (ICE driven)

Discussion Board - 2 hours 25 min ago
Here is an interesting alternator control.  Haven't looked at it closely.

https://birds-are-nice.me/ipfs/QmRzzZzdJsJD712naLMDUsYfwJ2ThphJvBuhLU4PTRzpp5/

Re: 48V alternator (ICE driven)

Discussion Board - 4 hours 25 min ago
All;
I was quietly asked to re-read these posts. It seems there's a mis-conception about people getting peeved about other posts.
Sure there are those who might be perplexed about why people take the long way around, but that doesn't mean they're slamm...

Re: A whisper 500, a roadtrip and a mission

Discussion Board - 9 hours 53 min ago
This is going to be a world wide interesting article. Well done so far, but please keep us all posted.

Dave in Hong Kong

Re: battery sizing

Discussion Board - Mon, 01/23/2017 - 22:03
Ok, with all that has been said I am assuming having two 12v's (24v) would work better than one 12v? As in the PMA would run a little bit better with two 12v's instead of one. I can't afford three more 12v batteries, the battery regulator- relay, dump ...

Re: A whisper 500, a roadtrip and a mission

Discussion Board - Mon, 01/23/2017 - 21:20
Congrats!
You earned it.
Now that you know what a dicey tower job is like, I bet you'll take extra precautions when it's time for the new tower to lift.  Looking forward to it 

Re: unusual car battery shelf life

Discussion Board - Mon, 01/23/2017 - 17:52
QuoteIf that's true, then it must be something about the way lead acid batteries are charged and discharged that ages them, not time itself.
more or less true; If you want a battery to last a long time then keep it in the fridge, don't actual...

Re: Low Cost Power Point Controller, Linear Current Booster

Discussion Board - Mon, 01/23/2017 - 14:58
BTW, be careful of mo(u)ld growing in the underfloor tubes if you've not already dealt with it.  It's caused grief to many an 'energy efficient house' builder.

Rgds

Damon

Re: Low Cost Power Point Controller, Linear Current Booster

Discussion Board - Mon, 01/23/2017 - 13:35
I'm still contemplating this.  Are these tubes  a 6 inch U under the slab recirculating with a fan? With a second fan for upper exhaust of hot air.  Ideally I would want to pwm the fans from the raw panel voltage.  If kept at low voltage the battery ch...

Re: Low Cost Power Point Controller, Linear Current Booster

Discussion Board - Mon, 01/23/2017 - 10:45
Try looking for old desktop computers. Most of them have 1 or 2 120mm fans in them, these are great for pushing air through.
AND free is a great price. You could even stack one at inlet the other at outlet. A temperature control could shut them off/on....

Re: unusual car battery shelf life

Discussion Board - Mon, 01/23/2017 - 09:36
Having lived in Saudi Arabia back in the late 80s, and drove a cool "firefly" I can say the battery had two things going for it.
1.) twice the size of what it would normally by for a 1000cc 4cyl 5 spd
2.) It had a sticker that said built for high-temp...

Re: unusual car battery shelf life

Discussion Board - Mon, 01/23/2017 - 07:35
Quote from: clockmanFRA on Today at 12:01:02 AMMy brother bought a new Toyota (big European 1800cc petrol saloon) in 1998, and yes the original battery is/was still on it 2016.
That is amazing. Never heard of...

Re: A whisper 500, a roadtrip and a mission

Discussion Board - Mon, 01/23/2017 - 06:30
quite a story .
you make it sound easy .

Re: 6 pole motor vs 4 pole for conversion

Discussion Board - Mon, 01/23/2017 - 02:29
An important disadvantage of using the original armature is that it contains alumium bars which are cast in the steel lamination. If you remove the outer shell of the armature you will see that a large part of the surface is aluminium. Aluminium is gui...

Re: unusual car battery shelf life

Discussion Board - Mon, 01/23/2017 - 01:01
My brother bought a new Toyota (big European 1800cc petrol saloon) in 1998, and yes the original battery is/was still on it 2016.

Interestedly the battery is very large compared to the new types, and my bruv insists on carefull maintenance. But the Toy...

A whisper 500, a roadtrip and a mission

Discussion Board - Sun, 01/22/2017 - 23:30
 I won a whisper 500, tower and controller etc on an online auction. (condition unknown) It was still erected, on another island and 20 hours away. So obviously it was time to grab an RV, load the kids and wife and do a roadtrip/family holiday.
 Trying...

Re: unusual car battery shelf life

Discussion Board - Sun, 01/22/2017 - 18:51
I was in Walmart last week to buy a tire and saw a clerk stocking batteries with a 5-year warranty. Most car batteries here in south Florida only last 2 or 3 years. I have had more than a few that died after a year and a half.
So I asked the clerk what...

Re: 48V alternator (ICE driven)

Discussion Board - Sun, 01/22/2017 - 17:51
Haha George, we cross posted.
You are quite right about us Aussies being very inventive, always have been and I don't know why, but it rally shocks some of our foreign friends.

Re: 48V alternator (ICE driven)

Discussion Board - Sun, 01/22/2017 - 17:25
Yes, modified sine wave inverters are pretty horrible. 
You only get three possible output voltage steps +100%  zero and -100% (three output levels).

But if you add a second square wave inverter to it that has an output transformer with 1/3 the output...

Re: 48V alternator (ICE driven)

Discussion Board - Sun, 01/22/2017 - 17:00
Quote from: Warpspeed on January 22, 2017, 01:38:48 PMHave to agree with Bergmanj, its quite frustrating when a simple idea is proven to work, but everyone  says they would rather stick with the more complex and expensive way...
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