[PSUBS-MAILIST] Brushless motor

Wed Jan 14 21:03:45 EST 2015

Brian,how do they cool the oil?Alan
      From: Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org>
 To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
 Sent: Thursday, January 15, 2015 2:57 PM
 Subject: Re: [PSUBS-MAILIST] Brushless motor

Making a trip tomorrow to check out the new oil cooled motor! Brian

--- personal_submersibles at psubs.org wrote:

From: Alan James via Personal_Submersibles <personal_submersibles at psubs.org>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
Subject: Re: [PSUBS-MAILIST] Brushless motor
Date: Mon, 12 Jan 2015 08:57:48 +0000 (UTC)

Hi Bob,yes I remember you from Washington.I am the guy from New Zealand with the funny accent.A lot of people on site are using Minn Kotta trolling motors.A number of people have recently purchased Minn Kota 101swith the Minn Kota controller. If you went that route you wouldhave a lot of help, & the Minn kotas are a tried & true solution.I am not sure what the consensus is on compensating them.I am intending to oil compensate my home made thrusters,mainly to help disipate the heat; & will pressurize the oil with air,slightly above ambient.IVC in Vancouver sell thruster assemblies for $2,195- each.http://www.ivccorp.com/content.html?page=2
I can't tell you what the assembly comprises.Alan

      From: via Personal_Submersibles <personal_submersibles at psubs.org>
 To: "submersibles, personal" <personal_submersibles at psubs.org> 
 Sent: Monday, January 12, 2015 7:07 PM
 Subject: Re: [PSUBS-MAILIST] Brushless motor

Alan,
 Thank you for your reply.  My name is Bob Travis.  I don't know how to make my name show up on my emails like the rest of the group and I apologize for not signing my question.  I have watched the threads for years now and I met some of you at the Psubs convention in Washington this last year (I was the one that no one was expecting).  But for the most part, I have just watched, read and attempted to learn.   A little background...  I started dreaming about a sub in 2005.  My wife (aka.. the read head) gave me permission to proceed, but of course, has occasionally put up some road blocks which has delayed things a bit.  I started the actual construction a little over 5 years ago.  I have studied Trustworthy, Persistence and Guernsey Submarine as well as snoopy and some of the other boats on the site and have gained great a great bit of knowledge and direction.  I have also learned an amazing amount from reading the threads from the group.   About me...  I am the quiet one that sits in the back of the class not wanting any attention. I have a huge problem with putting myself out there.  I live in Eastern Washington and I am building a K-350...... and, because of the above, have not posted my project pictures on the site.  I keep thinking that I am going to do this but I just haven't taken the time (or built up the nerve).  I am a pencil pusher.  I don't have a mechanical bone in my body!  So some of the most basic things are very difficult for me to get my arms around.  Want to negotiate a $500,000 deal, I'm your guy!  Want to hook up an electrical panel... Ahhhhhhh????????    I have made almost all of my structural parts, have had them welded and am now working on my electrical and have not a clue what I am doing at this point.  I am struggling with some of the most basic items (like finding the correct ampere meter) and for some reason have a mental block on how to proceed.  I really appreciate your response and will follow the link! I am at the point where the red head has told me to "get that stupid thing done" and I am not going to question it!  With her recent permission, I have a renewed energy level and will be doing what ever possible so that I am testing in August!  So with that said, I am going to be asking a bunch of very basic, stupid questions!  I will do my best to go back through the archives as to not bog the group down with previous topics. Hank... Any chance you will be making a journey to Spokane any time soon??? Thanks again everybody!!!  And with your help, and a little luck, I will be dragging my boat to the next Psubs convention on the east coats so you all can teach me how to dive it! Bob
From: "Alan James via Personal_Submersibles" <personal_submersibles at psubs.org>
To: "Personal Submersibles General Discussion" <personal_submersibles at psubs.org>
Sent: Sunday, January 11, 2015 5:01:59 PM
Subject: Re: [PSUBS-MAILIST] Brushless motor

Hi,not sure who I am talking to, but the brushless motors put out a lot lesselectronic noise, so less interferance with sensitive equipment.They don't wear out as quickly, as they don't have brushes, & you get more power for the same size unit. About 7 out of 8 thruster manufacturers use BLDC motors.There are a host of cheap motors at "Hobby King" With 785 Watt motors for $25-http://www.hobbyking.com/hobbyking/store/__522__517__Electric_Motors-45_to_50mm.htmlYou need an esc (electronic speed controller ) which costs about $50-.The escs normally work off a receiver sending them commands from the remote control transmitter.However there are control units you can buy that are wired straight to the esc.I  am experimenting with BLDC motors at the moment & are wanting to make up a thruster.Alan
From: via Personal_Submersibles <personal_submersibles at psubs.org>
To: "submersibles, personal" <personal_submersibles at psubs.org> 
Sent: Monday, January 12, 2015 1:23 PM
Subject: [PSUBS-MAILIST] Brushless motor

Is there a reason I should go with a brushless motor?  I can get a 500 watt, 36 volt scooter motor for about 50 bucks but brushless are harder to find and more expensive.  Is there an email thread on this already?  Has this been a topic of discussion in the past?
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