Cruisers Forum
 

Go Back   Cruisers & Sailing Forums > Search Forums
Reload this Page Search Results
Cruiser Wiki Click Here to Login
Register Vendors FAQ Community Calendar Today's Posts Log in

Page 1 of 7 1 23 Last »
Showing results 1 to 25 of 153
Search took 0.01 seconds. Search: Posts Made By: BjarneK
Forum: Electrical: Batteries, Generators & Solar 24-04-2024, 09:35
Replies: 5
Views: 268
Posted By BjarneK
Re: Changing an alternator from 12 to 24 volts

I was just interested in what was possible and thought others might feel the same. Having an external rectifier and regulator can never be wrong even if I do end up with another alternator in the...
Forum: Electrical: Batteries, Generators & Solar 22-04-2024, 22:37
Replies: 5
Views: 268
Posted By BjarneK
Changing an alternator from 12 to 24 volts

I recently changed my house battery bank from 800 AH LiFePO4 at 12 Volts to 400 Ah at 24 V. This of course involved a lot of changes to the electrical system. I will maybe start another couple of...
Forum: Electrical: Batteries, Generators & Solar 09-04-2024, 12:18
Replies: 8
Views: 1,858
Posted By BjarneK
Re: First impression of LTO batteries

I use a homemade BMS. One of the cells that I got has an issue that makes it leak some current. It continually leaks around 8 mA. My BMS is capabable of discharging each cell with about 50 mA so has...
Forum: Electrical: Batteries, Generators & Solar 28-02-2024, 14:15
Replies: 3
Views: 587
Posted By BjarneK
Re: Connect a solar panel directly to water heater

Here is a post I made a while ago with some relevant calculations. Even though you have a DC heating element, the principle is the same: ...
Forum: Electrical: Batteries, Generators & Solar 21-01-2024, 06:02
Replies: 167
Views: 12,485
Posted By BjarneK
Re: Open Source Arduino Alternator Regulator

Maybe add an option for an extra thermistor for temperature sense on an external rectifier for the people using that?
Forum: Construction, Maintenance & Refit 09-01-2024, 03:44
Replies: 4
Views: 1,235
Posted By BjarneK
Re: Silic One from Hempel in North America?

Thank you very much for drawing attention to this. It looks like it is quite a new development: https://www.hempel.com/news/2023/hempel-expands-yacht-market-reach
And Silic One is specifically...
Forum: Electrical: Batteries, Generators & Solar 11-12-2023, 14:59
Replies: 19
Views: 2,002
Posted By BjarneK
Re: Alternator regulator field PWM frequency

I think this equation applies to when if you are trying to drive the current up and down at a given frequency. What an alternator regulator does is to increase the current when it is on and let the...
Forum: Electrical: Batteries, Generators & Solar 04-12-2023, 15:49
Replies: 19
Views: 2,002
Posted By BjarneK
Re: Alternator regulator field PWM frequency

Thanks for this data point. I would expect running a DC motor and a field coil would be quite similar and high frequencies seem more common for running motors.
Forum: Electrical: Batteries, Generators & Solar 01-12-2023, 10:57
Replies: 19
Views: 2,002
Posted By BjarneK
Re: Alternator regulator field PWM frequency

That is what I was also thinking.
Forum: Electrical: Batteries, Generators & Solar 01-12-2023, 09:14
Replies: 19
Views: 2,002
Posted By BjarneK
Re: Alternator regulator field PWM frequency

Thanks for your reply. Here is a nice article about input capacitors for buck converters: https://www.ti.com/lit/an/slyt670/slyt670.pdf
It seems to me that an alternator regulator is similar to a...
Forum: Electrical: Batteries, Generators & Solar 01-12-2023, 08:20
Replies: 19
Views: 2,002
Posted By BjarneK
Re: Alternator regulator field PWM frequency

Thanks for the link to the detailed article. 128 Hz seems very low. I would think such a regulator would need some quite significant input capacitors to avoid making electrical noise.

I wonder why...
Forum: Electrical: Batteries, Generators & Solar 01-12-2023, 06:08
Replies: 19
Views: 2,002
Posted By BjarneK
Alternator regulator field PWM frequency

I am playing around with creating my own alternator regulator. It is based on a microcontroller and I can set the field current PWM frequency quite freely. It has been difficult for me to figure out...
Forum: Electrical: Batteries, Generators & Solar 26-06-2023, 09:45
Replies: 6
Views: 947
Posted By BjarneK
Re: The nature of diode in solar panels

Thanks a lot for the insightful replies. I will use Schottky diodes in my simulations.
Forum: Electrical: Batteries, Generators & Solar 26-06-2023, 03:39
Replies: 6
Views: 947
Posted By BjarneK
The nature of diode in solar panels

I am in the process of making same simulations for solar panels. It includes things like shade and parallel or series connection. To get the best results, I would like to know as much as possible...
Forum: Cooking and Provisioning: Food & Drink 22-06-2023, 05:29
Replies: 132
Views: 14,651
Posted By BjarneK
Re: Induction Cooking info and experience.

Here is my test of a cheap Ikea induction hob:https://www.cruisersforum.com/forums/f91/testing-of-ikea-dual-induction-hob-276389.html
To quote myself: "The power factor varies from 93 % on the low...
Forum: Deck hardware: Rigging, Sails & Hoisting 06-06-2023, 23:41
Replies: 58
Views: 6,668
Posted By BjarneK
Re: Dyneema Thermal Expansion - Enough to Break Things?

Good catch, thank you.
Forum: Electrical: Batteries, Generators & Solar 05-06-2023, 02:53
Replies: 11
Views: 800
Posted By BjarneK
Re: Need help deciding on DC/DC Charging

Isolated DC-DC converters have some advantages, but one downside is that they are not as efficient as non-isolated converters. The above converter is listed as being 87 % efficient, so if it is...
Forum: Electrical: Batteries, Generators & Solar 05-06-2023, 02:31
Replies: 11
Views: 800
Posted By BjarneK
Re: Need help deciding on DC/DC Charging

Using an MPPT controller for this sounds like a great idea, but it only works if the 48 V battery and the 12 V battery has no other ground connections than through the MPPT (and that would be quite...
Forum: Deck hardware: Rigging, Sails & Hoisting 03-06-2023, 05:08
Replies: 58
Views: 6,668
Posted By BjarneK
Re: Dyneema Thermal Expansion - Enough to Break Things?

I still have stainless steel shrouds and stays, my numbers were just what I would do if I had dyneema instead to get the same tension as I currently have on my stainless wires.

I don't have a...
Forum: Deck hardware: Rigging, Sails & Hoisting 03-06-2023, 02:48
Replies: 58
Views: 6,668
Posted By BjarneK
Re: Dyneema Thermal Expansion - Enough to Break Things?

As others have said above, these things can be calculated. Aluminium has a coefficient of thermal expansion of about 13 ppm / deg C and for dyneema it is about -12 ppm / deg C. Amsteel Blue SK-78...
Forum: Cooking and Provisioning: Food & Drink 02-06-2023, 11:49
Replies: 5
Views: 1,226
Posted By BjarneK
Testing of Ikea dual induction hob

I just bought this portable dual induction hob from Ikea: https://www.ikea.com/gb/en/p/tillreda-portable-induction-hob-2-zones-white-90497166

I thought it might be useful for others to see my test...
Forum: Engines and Propulsion Systems 18-05-2023, 09:18
Replies: 9
Views: 765
Posted By BjarneK
Re: Linkage adjustment on ZF 25ma

We had the same issue with the same transmission. It started after about a year from new.

I was never able to solve the issue and ended up replacing the transmission.

It would shift fine when...
Forum: Deck hardware: Rigging, Sails & Hoisting 27-04-2023, 13:12
Replies: 10
Views: 1,338
Posted By BjarneK
Re: Side mounting of rope clutch

I will see if I can find a good alternative. Otherwise it will be Franziska's approach.
Forum: Deck hardware: Rigging, Sails & Hoisting 27-04-2023, 06:54
Replies: 10
Views: 1,338
Posted By BjarneK
Re: Side mounting of rope clutch

Thanks for the suggestion of contacting Lewmar tech support. I e-mailed them and got a reply this morning. It turns out that they changed the clutches since the (approx 2015) model I have. The new...
Forum: Construction, Maintenance & Refit 24-04-2023, 06:20
Replies: 4
Views: 1,235
Posted By BjarneK
Silic One from Hempel in North America?

We are interested in trying the Silic One anti fouling (actually fouling release) product from Hempel on our aluminum boat.

We are currently in Mexico, but I can find no dealers online in North...
Showing results 1 to 25 of 153
Page 1 of 7 1 23 Last »

 
Forum Jump


All times are GMT -7. The time now is 08:22.

Contact Us - Cruisers & Sailing Forums - Sitemap - Community Rules - Terms of Service - Privacy - Accessibility - Top

Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
close

Privacy Guaranteed - your email is never shared with anyone, opt out any time.


ShowCase vBulletin Plugins by Drive Thru Online, Inc.