T-Pain Is On A Boat

Friday, July 26, 2019

[Electric Boats] Pactorq Motors replacment options

Bought an older Sail Craft catamaran powered with Pactorq servo brushless dc motors, 144volt, I lost commutation in one motor and through the process found out their obsolete. I'm looking to replace the set, I see there are many options available, just thought I'd put it out there if someone has the wisdom to recommend a suitable replacement. 14000lbs displacement, 44 ft long, 3.5 ft draft.

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Posted by: sailorboy55577@yahoo.com

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Thursday, July 25, 2019

Re: [Electric Boats] Sevcon Gen4 regen

I meant Navitas 400 Tpm controller.

On Jul 24, 2019 10:09 AM, "Capt. Mike" <biankablog@verizon.net> wrote:

Interesting I replaced the dead original controller with a Sevcon recently. I am not sure of the model but, did notice I started to see regenerative at much lower speed than the original Navonics 400 controller.

On Jul 22, 2019 10:11 PM, "lightdoesnotage@yahoo.com [electricboats]" <electricboats@yahoogroups.com> wrote:

I discovered something weird/interesting on the Thunderstruck 10kW kit with a Sevcon Gen4 controller. Our reduction is a 3:1 belt fyi.

We were out doing a bit of sailing today and were moving at about 5.2 knots. I pushed the throttle forward a bit and we started regen at about 60 watts. I then pushed the throttle MORE forward and the regen went UP to about 120 watts. Pushing it even farther and it dropped off and then started to consume a small amount of power. On some gusts when we were going 5.8 knots I saw a max of around 170 watts of regen when playing around with the throttle.

Just interesting. I am not sure if you guys already knew this. I had first assumed that once you pushed the throttle out of neutral that was all you had to do to get regen but it seems like you can fine tune to get more regen by adjusting the throttle a little further.

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Posted by: "Capt. Mike" <biankablog@verizon.net>

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Wednesday, July 24, 2019

Re: [Electric Boats] Sevcon Gen4 regen

Interesting I replaced the dead original controller with a Sevcon recently. I am not sure of the model but, did notice I started to see regenerative at much lower speed than the original Navonics 400 controller.

On Jul 22, 2019 10:11 PM, "lightdoesnotage@yahoo.com [electricboats]" <electricboats@yahoogroups.com> wrote:

I discovered something weird/interesting on the Thunderstruck 10kW kit with a Sevcon Gen4 controller. Our reduction is a 3:1 belt fyi.

We were out doing a bit of sailing today and were moving at about 5.2 knots. I pushed the throttle forward a bit and we started regen at about 60 watts. I then pushed the throttle MORE forward and the regen went UP to about 120 watts. Pushing it even farther and it dropped off and then started to consume a small amount of power. On some gusts when we were going 5.8 knots I saw a max of around 170 watts of regen when playing around with the throttle.

Just interesting. I am not sure if you guys already knew this. I had first assumed that once you pushed the throttle out of neutral that was all you had to do to get regen but it seems like you can fine tune to get more regen by adjusting the throttle a little further.

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Posted by: "Capt. Mike" <biankablog@verizon.net>

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Tuesday, July 23, 2019

[Electric Boats] Re: Sevcon Gen4 regen

Hi lightdoesnotage,

That's interesting. On my old Sevcon Millipak which was setup by SolidNav, I would leave my throttle in forward and feather the throttle (separate throttle and shift) to get the most out of regen. I stumbled on that when trying to figure out a throttle setting to cancel prop drag. At times I would have the throttle set fully at 1/3 on and be making 2-4amps at 52 volts (100 to 200 watts). I swapped the Millipac with a Gen 4 and do not have the capability to feather the throttle in the same way. I get about half the regen that I used to get. I wonder how Thunderstruck programs their Gen 4's to enable that.

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Posted by: acsarfkram@yahoo.com

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Monday, July 22, 2019

[Electric Boats] Sevcon Gen4 regen

I discovered something weird/interesting on the Thunderstruck 10kW kit with a Sevcon Gen4 controller. Our reduction is a 3:1 belt fyi.

We were out doing a bit of sailing today and were moving at about 5.2 knots. I pushed the throttle forward a bit and we started regen at about 60 watts. I then pushed the throttle MORE forward and the regen went UP to about 120 watts. Pushing it even farther and it dropped off and then started to consume a small amount of power. On some gusts when we were going 5.8 knots I saw a max of around 170 watts of regen when playing around with the throttle.

Just interesting. I am not sure if you guys already knew this. I had first assumed that once you pushed the throttle out of neutral that was all you had to do to get regen but it seems like you can fine tune to get more regen by adjusting the throttle a little further.

__._,_.___

Posted by: lightdoesnotage@yahoo.com

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