Tuesday, January 16, 2018

[Electric Boats] Perfect sailors motor boat

 

Hi all.  First post. I'm a sailor from Australia.  Currently own a nice sailing catamaran that i built. As i get old it is too hard to hoist the main sail and all the trimming and reefing gets too hard.  I am planning on building the perfect sailors motor boat basically i am looking at replacing the sails with solar panels.  The design will be a trimaran for stability and to make a hull shape that is very slippery.  Looking at approx 40 foot LOA with 16 foot BOA.  

I hope you guys can check the maths to see if i am being too optimistic in my assumptions.

Area of solar panels 32 sq meters - gives 5 kW system - in low tropics gives 20+ kWH per day.

Propulsion by twin motors in the amas say 10 hp = 7.5 kW gives cruising speed 5 to 6 knots.

Battery pack similar to the one in a tesla car 75 kWH weight of batteries 540 kg. Total weight of boat 3 ton with back up 10 kWH generator for extended cruising.


Does this seem feasible? Does my maths add up?


Chris P


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Posted by: chrispurkiss@bigpond.com
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[Electric Boats] Electric Propulsion at the San Diego Boat Show

 

The San Diego "Big Bay Boat Show" begins 1/25 though 1/28.  We will once again be presenting at the show with seminars on Friday and Saturday.  Hope those of you who are close by can visit the show.  There will be a number of electric sailors spending time with us along with a very experienced installer who build his own electric propulsion system.
http://bigbayboatshow.com/

The next major US West Coast show will be the Pacific Sail and Power Show in April.

Mike
Electric Yachts of Southern California/Pacific

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Posted by: mike@electricyachtssocal.com
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Monday, January 15, 2018

Re: [Electric Boats] chargers for high amp-hour 6v batteries

 

Thanks Jeremy, very helpful!

On Sun, Jan 14, 2018 at 6:23 AM, 'P. Jeremy Baker' childscrick@yahoo.com [electricboats] <electricboats@yahoogroups.com> wrote:
 

I discovered a book, Energy Unlimited by Reinout Vader, that is the most concise and comprehensive book I've found for using battery based energy systems on boats. 
https://www.victronenergy.com/upload/documents/Book-Energy-Unlimited-EN.pdf


Jeremy

On Jan 13, 2018, at 3:10 PM, consultativeskills@gmail.com [electricboats] <electricboats@yahoogroups.com> wrote:

 

I have been charging six 12v Interstate batteries [ 36V system; series and parallel configuration] with two ProMariner ProTournament chargers..  The batteries are shot, and I"m intrigued by the conversations I've seen here suggesting high Amp-hour Golf Cart batteries [Thanks "king of New Orleans" for your detailed posts!]..

However, the ProMariner folks say their chargers cannot charge 6 V batteries with those high amp-hour capacities. 

What chargers could you all recommend, that would work in charging the bank of six 6V batteries I'd need to get to 36V? And,  I presume the configuration would be 6 batteries in series now?

Thanks to you all.
Mike.




--
Mike Kirkwood
consultativeskills@gmail.com
www.InternalConsultativeSkills.com
Consultative Skills education and consulting
Sales Performance Skills training and Coaching
O: 952 472 4043
C: 612 532 7161

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Posted by: Michael Kirkwood <consultativeskills@gmail.com>
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Re: [Electric Boats] Re: Treadmill motors

 


On Jan 15, 2018, at 1:15 AM, Mark F mark.internet@yahoo.ca [electricboats] <electricboats@yahoogroups.com> wrote:

 

Could you send me a link to this controller?
I would like to test it at 96 volts

Thanks

From: "BRUCE NOBLE brucenoble@bellsouth.net [electricboats]" <electricboats@yahoogroups.com>
To: electricboats@yahoogroups.com
Sent: Sunday, January 14, 2018 4:07 PM
Subject: Re: [Electric Boats] Re: Treadmill motors

 
Ya mine are dc 120 vdc 18 amp  2.5 hp continuous.   i have found an inexpensive dc controller 100 vdc  i think and 15 amp max  thinking on trying 48 v and see how it works then i can always add more batteries ie 60v 72 v ect
  

On Jan 14, 2018, at 1:08 PM, Mark F mark.internet@yahoo.ca [electricboats] <electricboats@yahoogroups.com> wrote:

 
Most treadmill's that I have disassembled are DC motors rated at 120V DC or higher.
The treadmills is A/C, but they use a controller to change from A/C to DC. I believe they use SCR's..
I have ran them directly off batteries.

Maybe newer ones are A/C though I think it would cost more to produce.

Also the DC motor have more torque.



From: "Chris Morriss chris.morriss@ouroboros.myzen.co.uk [electricboats]" <electricboats@yahoogroups.com>
To: electricboats@yahoogroups.com
Sent: Sunday, January 14, 2018 8:10 AM
Subject: Re: [Electric Boats] Re: Treadmill motors

 
AFAIK, looking at the controller they use, these are AC drive, brushless permanent-magnet motors, rather than old-fashioned AC motors used with variable frequency drives.

On 14/01/2018 15:58, king_of_neworleans wrote:
It could work. Remember that an old lifeboat is a very heavy hull for its length, though. Great hull shape, very slippery at displacement speeds, as any rowing boat must be, but a lot of inertia there. You will want some torque limiting built into your controller, for sure.

These are indunctance AC motors? Control could be an issue, I don't know, though it must work fairly well at a wide RPM range. Matching a controller to the motor could involve a lot of potentially destructive as well as expensive testing. Maybe someone has already done this? I have never heard of it.

I must sound like a broken record, but my top recommendation for you must be a 5kw brushless DC motor and controller on a 48v bank, either with a belt drive reduction, or with a thrust bearing to transfer the axial push of the shaft to the hull and protect the motor. It is simple, the heavy engineering is already done for you, and it just works. You might think about a salvaged forklift motor and controller, or golf cart motor and controller, but I would zero in on something like a Motenergy ME0907 or a ME0201014201 motor, or a similar from Golden Motor. Reasonably cheap, dependable, popular, and a lot of existing systems in place so there is a decent sized peer group of users to compare notes with. This will double your available horsepower and keep things nice and simple. You will be walking down a path well trodden. More likely to end up with a practical system first time around.

Nice thing about using an old open lifeboat is if your propulsion system fails, you can always row home. If you can find a decent set of oars, that is. Not easy to find new oars that long, now that ships have gone to enclosed lifeboats. Old ones will have issues.





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Posted by: BRUCE NOBLE <brucenoble@bellsouth.net>
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Re: [Electric Boats] Re: Treadmill motors

 


On Jan 15, 2018, at 1:15 AM, Mark F mark.internet@yahoo.ca [electricboats] <electricboats@yahoogroups.com> wrote:

 

Could you send me a link to this controller?
I would like to test it at 96 volts

Thanks

From: "BRUCE NOBLE brucenoble@bellsouth.net [electricboats]" <electricboats@yahoogroups.com>
To: electricboats@yahoogroups.com
Sent: Sunday, January 14, 2018 4:07 PM
Subject: Re: [Electric Boats] Re: Treadmill motors

 
Ya mine are dc 120 vdc 18 amp  2.5 hp continuous.   i have found an inexpensive dc controller 100 vdc  i think and 15 amp max  thinking on trying 48 v and see how it works then i can always add more batteries ie 60v 72 v ect
  

On Jan 14, 2018, at 1:08 PM, Mark F mark.internet@yahoo.ca [electricboats] <electricboats@yahoogroups.com> wrote:

 
Most treadmill's that I have disassembled are DC motors rated at 120V DC or higher.
The treadmills is A/C, but they use a controller to change from A/C to DC. I believe they use SCR's..
I have ran them directly off batteries.

Maybe newer ones are A/C though I think it would cost more to produce.

Also the DC motor have more torque.



From: "Chris Morriss chris.morriss@ouroboros.myzen.co.uk [electricboats]" <electricboats@yahoogroups.com>
To: electricboats@yahoogroups.com
Sent: Sunday, January 14, 2018 8:10 AM
Subject: Re: [Electric Boats] Re: Treadmill motors

 
AFAIK, looking at the controller they use, these are AC drive, brushless permanent-magnet motors, rather than old-fashioned AC motors used with variable frequency drives.

On 14/01/2018 15:58, king_of_neworleans wrote:
It could work. Remember that an old lifeboat is a very heavy hull for its length, though. Great hull shape, very slippery at displacement speeds, as any rowing boat must be, but a lot of inertia there. You will want some torque limiting built into your controller, for sure.

These are indunctance AC motors? Control could be an issue, I don't know, though it must work fairly well at a wide RPM range. Matching a controller to the motor could involve a lot of potentially destructive as well as expensive testing. Maybe someone has already done this? I have never heard of it.

I must sound like a broken record, but my top recommendation for you must be a 5kw brushless DC motor and controller on a 48v bank, either with a belt drive reduction, or with a thrust bearing to transfer the axial push of the shaft to the hull and protect the motor. It is simple, the heavy engineering is already done for you, and it just works. You might think about a salvaged forklift motor and controller, or golf cart motor and controller, but I would zero in on something like a Motenergy ME0907 or a ME0201014201 motor, or a similar from Golden Motor. Reasonably cheap, dependable, popular, and a lot of existing systems in place so there is a decent sized peer group of users to compare notes with. This will double your available horsepower and keep things nice and simple. You will be walking down a path well trodden. More likely to end up with a practical system first time around.

Nice thing about using an old open lifeboat is if your propulsion system fails, you can always row home. If you can find a decent set of oars, that is. Not easy to find new oars that long, now that ships have gone to enclosed lifeboats. Old ones will have issues.





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Posted by: BRUCE NOBLE <brucenoble@bellsouth.net>
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With 4.5 stars in iTunes, the Yahoo Mail app is the highest rated email app on the market. What are you waiting for? Now you can access all your inboxes (Gmail, Outlook, AOL and more) in one place. Never delete an email again with 1000GB of free cloud storage.

.

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Sunday, January 14, 2018

Re: [Electric Boats] Re: Treadmill motors

 

Could you send me a link to this controller?
I would like to test it at 96 volts

Thanks

From: "BRUCE NOBLE brucenoble@bellsouth.net [electricboats]" <electricboats@yahoogroups.com>
To: electricboats@yahoogroups.com
Sent: Sunday, January 14, 2018 4:07 PM
Subject: Re: [Electric Boats] Re: Treadmill motors

 
Ya mine are dc 120 vdc 18 amp  2.5 hp continuous.   i have found an inexpensive dc controller 100 vdc  i think and 15 amp max  thinking on trying 48 v and see how it works then i can always add more batteries ie 60v 72 v ect
  

On Jan 14, 2018, at 1:08 PM, Mark F mark.internet@yahoo.ca [electricboats] <electricboats@yahoogroups.com> wrote:

 
Most treadmill's that I have disassembled are DC motors rated at 120V DC or higher.
The treadmills is A/C, but they use a controller to change from A/C to DC. I believe they use SCR's..
I have ran them directly off batteries.

Maybe newer ones are A/C though I think it would cost more to produce.

Also the DC motor have more torque.



From: "Chris Morriss chris.morriss@ouroboros.myzen.co.uk [electricboats]" <electricboats@yahoogroups.com>
To: electricboats@yahoogroups.com
Sent: Sunday, January 14, 2018 8:10 AM
Subject: Re: [Electric Boats] Re: Treadmill motors

 
AFAIK, looking at the controller they use, these are AC drive, brushless permanent-magnet motors, rather than old-fashioned AC motors used with variable frequency drives.

On 14/01/2018 15:58, king_of_neworleans wrote:
It could work. Remember that an old lifeboat is a very heavy hull for its length, though. Great hull shape, very slippery at displacement speeds, as any rowing boat must be, but a lot of inertia there. You will want some torque limiting built into your controller, for sure.

These are indunctance AC motors? Control could be an issue, I don't know, though it must work fairly well at a wide RPM range. Matching a controller to the motor could involve a lot of potentially destructive as well as expensive testing. Maybe someone has already done this? I have never heard of it.

I must sound like a broken record, but my top recommendation for you must be a 5kw brushless DC motor and controller on a 48v bank, either with a belt drive reduction, or with a thrust bearing to transfer the axial push of the shaft to the hull and protect the motor. It is simple, the heavy engineering is already done for you, and it just works. You might think about a salvaged forklift motor and controller, or golf cart motor and controller, but I would zero in on something like a Motenergy ME0907 or a ME0201014201 motor, or a similar from Golden Motor. Reasonably cheap, dependable, popular, and a lot of existing systems in place so there is a decent sized peer group of users to compare notes with. This will double your available horsepower and keep things nice and simple. You will be walking down a path well trodden. More likely to end up with a practical system first time around.

Nice thing about using an old open lifeboat is if your propulsion system fails, you can always row home. If you can find a decent set of oars, that is. Not easy to find new oars that long, now that ships have gone to enclosed lifeboats. Old ones will have issues.





__._,_.___
Posted by: Mark F <mark.internet@yahoo.ca>
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.

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Re: [Electric Boats] Re: Treadmill motors

 

Thunderstruck has a prefab belt drive reduction unit. A couple of other vendors have them. Or you can fabricate your own, which might better suit your installation.



---In electricboats@yahoogroups.com, <brucenoble@...> wrote :

Any sugestions on where to get one with the pulleys set up (thrust bearings in place ) on it reasonable price    Bruce

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Reply via web post • Reply to sender • Reply to group • Start a New Topic • Messages in this topic (10)
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With 4.5 stars in iTunes, the Yahoo Mail app is the highest rated email app on the market. What are you waiting for? Now you can access all your inboxes (Gmail, Outlook, AOL and more) in one place. Never delete an email again with 1000GB of free cloud storage.

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