Preorder. PV NextGen FOC 130v 200/600A 25kw - $499

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Powervelocity.com   10 kW

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Re: Updated: PV NextGen FOC 130v 25kw - $499

Post by Powervelocity.com » Feb 06 2020 3:07pm

The issue with the password reset is resolved on the website, you should be able to request a reset link and get the new password right away.

The torque control is superb with three sensor/phase setups. The throttle response feels very smooth and natural.

The controller temp is monitored all the time by the firmware and safety power rollbacks are autoMagic.
Technically, it should be impossible to overheat it. You can also monitor temperatures through the phone/watch apps.

Mosfets in controllers blow up under load/acceleration not so much due to the heat though, but rather due to voltage spikes because of a sub par hardware design. That's one big reason why there are not so many reliable controllers in >90v range because higher voltage requires much more careful approach in the design that pushes up the cost of development.

A six phase motor can be treated as a two motor setup. You can use a throttle input on one controller and command torque to the second controller via the CAN connection. The current/torque will be balanced. Of course, both controllers need to be programmed identically and the firmware handles that nicely out of the box pushing configuration to slave controllers from the master. There is also a traction control option for multi controller setups.

Regen is variable and works very well but one thing to remember is that it's not the controller but your battery that imposes hard limits on how much current you can feed back into it. Most li-ion chemistries can't take more than 0.5C of the charge current. Some allow supercharging at 1C or more but then you have to actively manage the quick temperature rise on the cells.
John in CR wrote:
Feb 05 2020 1:57am

I need 2 to drive my 6phase HubMonster powered MadAss that has a 31s pack with which I run a fresh off the charger max voltage of 128V. As long as torque throttle control is great, then I'd run each controller at 150A battery side 250-300A phase current. The motor is well ventilated, so it can handle at least that current. Some guys have run theirs much higher against my recommendations without nearly the cooling I have. I just haven't had controllers capable of more than that current. I'd push it higher temporarily if you want as long as I can see controller temp, because I'd rather run conservative than risk having to change out controllers more than the initial time, as it's pretty involved on this bike.

BTW, I tried to recover my password but have yet to get the email to reset, and the site won't let me proceed with the preorder of 2 controllers without logging in since it recognized my email address JohnCF*****@yahoo.com . You should be able to look me up with that portion of my email since I'm a long-time customer.

If you want me to truly limit test one, I do have a very low inductance v1 speed wind 50mm wide QS273 that's vented and I've pushed it at over 400 battery side amps. I couldn't run it continuously with a 31s pack due to high iron losses, but I could do some short speed bursts. I've never blown a controller at speed anyway, so the real test would be high current and high voltage at partial throttle attacking a mountain road, and I've got a kilometers long 20% continuous grade road that leads to a wind farm on top of the mountain perfect for limit testing anything by accelerating hard out of the switchbacks. The regen better not go out on me, because the scary part is coming back down with mechanical brakes.

John in CR   100 GW

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Re: Preorder. PV NextGen FOC 130v 200/600A 25kw - $499

Post by John in CR » Feb 06 2020 4:48pm

Even with the automatic current limiting based on temps (whether adjustable by the user or not), it's good to display controller temps. Real time temps of motor and controller helps the user learn the limits of his system and how riding style and conditions affect temps. Once you gain that feel monitoring temps becomes unnecessary and you look at temps only occasionally to confirm your "feel" of your system is well calibrated, as well as to see the effects of changes in controller settings. There's already a temp sensor, so add it to reported stats.

Whats the wait time or do you now carry stock?

Also note that I'm sending a PM on a separate topic.

Powervelocity.com   10 kW

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Re: Preorder. PV NextGen FOC 130v 200/600A 25kw - $499

Post by Powervelocity.com » Feb 06 2020 6:30pm

Yes, you can monitor the temperatures real time via a mobile device. There is a chance we'll be adding a small display for things like these down the road. And will have logging eventually as well, so you can analyze trip data at any later time.

The wait time is currently approx 1 month which means if you place an order now, you'll get receive it sometime in early March.

John in CR wrote:
Feb 06 2020 4:48pm
Even with the automatic current limiting based on temps (whether adjustable by the user or not), it's good to display controller temps. Real time temps of motor and controller helps the user learn the limits of his system and how riding style and conditions affect temps. Once you gain that feel monitoring temps becomes unnecessary and you look at temps only occasionally to confirm your "feel" of your system is well calibrated, as well as to see the effects of changes in controller settings. There's already a temp sensor, so add it to reported stats.

Whats the wait time or do you now carry stock?

Also note that I'm sending a PM on a separate topic.

Mywpn   100 mW

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Re: Preorder. PV NextGen FOC 130v 200/600A 25kw - $499

Post by Mywpn » Feb 14 2020 6:54am

So too some degree, this controller is torque limiting when accelerating from a standing start? And is this adjustable? I’m not interested in smooth transition into power. But instant maximum capacity from 0 rpm.

Is this controller capable on being programmed for 400 battery amps and 600 phase amps with the current software?

Bartosh   10 W

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Re: Preorder. PV NextGen FOC 130v 200/600A 25kw - $499

Post by Bartosh » Feb 14 2020 3:12pm

+1, good question, I'm also interested.

Some more questions if I may. Is PID tuning possible? As you mentioned it's based on VESC, is it possible to use vesc tool? Recent firmware / features supported (like improved sensorless)? I mean how far is it vesc compatible?

Powervelocity.com   10 kW

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Re: Preorder. PV NextGen FOC 130v 200/600A 25kw - $499

Post by Powervelocity.com » Feb 14 2020 3:41pm

The default throttle control is current/torque which is what you want to have on most surface vehicles like cars, bikes, skateboards, etc. The full torque is available at 0 rpm with this control. The limit is applied up to the programmed values and/or hardware limits. That’s regardless of the control type you use.

Duty cycle control would be more appropriate for aircraft.

Throttle curves are adjustable. The controller runs the latest VESC firmware plus more custom features like charging mode that allows to use any DC source with voltage below the battery target voltage. So, it has all features of the VESC firmware plus more.

High frequency injection is there as well. I haven’t tested it enough to recommend it. For now, halls are likely the most reliable way to go. It runs regular sensorless pretty well too. Just sometimes needs a slight push. HFI will improve over time and will be reliable as well.




Bartosh wrote:
Feb 14 2020 3:12pm
+1, good question, I'm also interested.

Some more questions if I may. Is PID tuning possible? As you mentioned it's based on VESC, is it possible to use vesc tool? Recent firmware / features supported (like improved sensorless)? I mean how far is it vesc compatible?

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bee   100 W

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Re: Preorder. PV NextGen FOC 130v 200/600A 25kw - $499

Post by bee » Feb 19 2020 11:35pm

do you ship these to Canada?
Chalo wrote:Hydraulic [suspension] is just vanity and moto-fetishism at anything in the range of attainable bicycle speeds.
2002 Devinci Magma - 117v GNG


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