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71
Electric Boat Conversions / MOVED: Questions about continuous regen
« Last post by Bikemad on April 02, 2025, 03:16:34 PM »
This topic has been moved to Electric Boat Conversions.

https://goldenmotor.com/SMF/index.php?topic=7551.0
72
Electric Boat Conversions / Re: Boat throttle mod runs motor in reverse…
« Last post by Alpegu on April 01, 2025, 08:38:03 PM »
Miromax hall effect throttle: https://www.miromax.lt/en/speed-throttle-for-boat--water-transport#to_products
73
Electric Boat Conversions / Re: Boat throttle mod runs motor in reverse…
« Last post by Johnculley on April 01, 2025, 07:33:13 PM »
Quote from: Alpegu on March 26, 2025, 02:50:19 PM
Hi, I've got the same issue and was wondering how you solved it?

Which throttle are you using ?
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Electric Boat Conversions / Re: Regen with reverse switch on but going forward
« Last post by Alpegu on March 31, 2025, 06:29:50 AM »
Update: so far, I've been able to confirm that the reverse button does indeed swap direction of motion even with a hyperbolic throttle, provided I go to neutral first (makes sense).

When I short the regen brake button, regardless of spin direction, the motor stops quickly and I get the 17 beep alarm that I'd expect when regen is on (as seen on other posts). Whether this actually recharges the batteries or not remains to be seen, as the motor isn't yet connected to the propeller, nor indeed is the boat in the water yet.
75
Electric Boat Conversions / Re: VEC300 for boat: questions about regen, reverse, hall effect throttle
« Last post by Bikemad on March 30, 2025, 02:10:00 PM »
Quote from: Alpegu on March 26, 2025, 02:24:26 PM
Is there any way I can find out about the answer to these?

I don't know if the motor actually produces the same amount of power in Reverse as it does in the default Forward direction, and I don't know how/if the Reverse switch function will affect the motor operation when the Hyperbola throttle mode (Boat throttle with Forward-Neutral-Reverse operation) is being used.

You could simply try fitting a Reverse switch and see if it has any effect on the motor's direction and/or rpm.

Alan
 
76
Reviews / Re: Magic Pie 5 ... Still no problems 4 years later ...
« Last post by diverdon on March 27, 2025, 05:41:44 PM »
   

      March 27 2025 .. Another year of riding the Magic Pie most every day for an hour or 2 ... And ZERO Problems for another Year .. Thanks For the Great Product and Support ... Don J.
77
Electric Boat Conversions / Regen with reverse switch on but going forward
« Last post by Alpegu on March 26, 2025, 08:59:28 PM »
Hi everyone, I'm hoping you can help me with some questions regarding reverse and regen:

I have a GM BLDC 5kW motor and a VEC300 controller on my sailboat. Due to the way the motor sits, the boat goes forward when the motor turns anti-clockwise. Last year, I had a DIY potentiometer throttle that didn't last long, so I've bought a hall-type throttle from Miromax. It seems alright but it can only be installed in such a way that pushing the lever forward delivers a lower signal, ie it sends a reverse signal to the motor.

Now, since this direction of motor rotation is what makes my boat go forward, it seems perfect. But, I won't get any regen as the motor will always be "reversing". I know I can swap the blue and green cables, plus the hall cables, to reverse the default forward direction of the motor, but that would mean that pushing my throttle forward would make the boat go backwards.

My questions:

- How can I keep the throttle in its current position, while still being able to get regen?

- Does shorting the reverse button just swap the direction of movement? If I short the reverse switch, will it just swap which way my boat goes relative to the throttle signal?

- Does the reverse switch even work with a hyperbolic throttle type, where you already reverse by moving the throttle backwards from the midpoint?

- If this is the case, can I short both regen and reverse buttons to "swap" the direction that the controller considers to be forward, allowing regen to take place?

78
Electric Boat Conversions / Re: Boat throttle mod runs motor in reverse…
« Last post by Alpegu on March 26, 2025, 02:50:19 PM »
Hi, I've got the same issue and was wondering how you solved it?
79
Electric Boat Conversions / Re: VEC300 for boat: questions about regen, revers, hall effect throttle
« Last post by Alpegu on March 26, 2025, 02:24:26 PM »
Thank you!

Is there any way I can find out about the answer to these?

I don't know if the motor actually produces the same amount of power in Reverse as it does in the default Forward direction, and I don't know how/if the Reverse switch function will affect the motor operation when the Hyperbola throttle mode (Boat throttle with Forward-Neutral-Reverse operation) is being used.
80
Electric Boat Conversions / Re: Questions about continuous regen
« Last post by Bikemad on March 25, 2025, 06:09:26 PM »
Hi andto the forum.

Unfortunately, I have no experience with either the HTM07KW motor or the EZ-A72400 controller so I don't know what sort of regen current output you might expect to see, or whether continuous regen operation would cause any problems.

The EZ-A72400 has a rated motor power of 3-6kW, but the HTM07KW is rated at 7kW with a peak of 18kW therefore the EZ- A72500 rated for a 4-7kW motor (or even the EZ-A72800 rated for 7-12kw motor) might be a better choice of controller if more power is likely to be required occasionally.

As the HTM07KW motor is rated for 92A @ 72V (6.624kW @ 1,950rpm) I'm guessing that it might produce a regen output of ~78A @ 84V maximum charging voltage (6.552kW @ 2,275rpm) if the regen efficiency is somewhere near the motor's power output efficiency.

I also noticed that the 7 and 11kW motors are both described as having "Natural cooling" yet they both appear to have liquid cooling pipe connections. ::)

Alan
 
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