Search found 91 matches

by Andrewol
Nov 14 2019 2:36am
Forum: E-Bike Non-hub Motor Drives
Topic: New Approach to 4500W Mid Drive
Replies: 61
Views: 8822

Re: New Approach to 4500W Mid Drive

How gearbox looks inside?
by Andrewol
Nov 08 2019 9:00am
Forum: E-Bike Non-hub Motor Drives
Topic: Cyclone 3000 vs CYC X1 Pro?
Replies: 31
Views: 3783

Re: Cyclone 3000 vs CYC X1?

breaker should be ok <100A - but cant find any info on trip curves other than this: https://d1819pwkf4ncw.cloudfront.net/files/documents/midnite-solar-breaker-time-delay-values-352837.pdf if its an 'instant trip' then anything >100a may trip instantly. a medium or long one (if you can find it) woul...
by Andrewol
Nov 08 2019 3:49am
Forum: E-Bike Non-hub Motor Drives
Topic: Cyclone 3000 vs CYC X1 Pro?
Replies: 31
Views: 3783

Re: Cyclone 3000 vs CYC X1?

If your reply was related to my comment, I think the main drawbacks of such fuses are resistance and one time use. Resistance is wasted battery energy. It can be overrated to avoid such issue somehow, but breaker is better in this regard I think.
by Andrewol
Nov 06 2019 5:06pm
Forum: E-Bike Non-hub Motor Drives
Topic: Cyclone 3000 vs CYC X1 Pro?
Replies: 31
Views: 3783

Re: Cyclone 3000 vs CYC X1?

thanks for the tip. I'm going to use solar DC breaker like this.
https://www.ebay.com/itm/MIDNITE-SOLAR- ... 2763.l2649
by Andrewol
Nov 06 2019 10:45am
Forum: E-Bike Non-hub Motor Drives
Topic: Cyclone 3000 vs CYC X1 Pro?
Replies: 31
Views: 3783

Re: Cyclone 3000 vs CYC X1?

I found only a few types of active equalizers.
by Andrewol
Nov 06 2019 9:51am
Forum: E-Bike Non-hub Motor Drives
Topic: Cyclone 3000 vs CYC X1 Pro?
Replies: 31
Views: 3783

Re: Cyclone 3000 vs CYC X1?

Never saw such balancer. It's like active BMS, despite all BMSs available are passive discharge balancing type. Circuit brackers can be small enough. https://electricscooterparts.com/circuitbreakers.html https://www.worldelectricsupply.com/shop/en/p/ge-industrial-solutions-thqp140-1-pole-120-240-vol...
by Andrewol
Nov 06 2019 6:18am
Forum: E-Bike Non-hub Motor Drives
Topic: Cyclone 3000 vs CYC X1 Pro?
Replies: 31
Views: 3783

Re: Cyclone 3000 vs CYC X1?

If you are without BMS, do you limit the current in case of short with industrial circuit braker? How this 1A active ballancer looks like?
This is my layout choice for your consideration.
by Andrewol
Nov 06 2019 3:56am
Forum: E-Bike Non-hub Motor Drives
Topic: Cyclone 3000 vs CYC X1 Pro?
Replies: 31
Views: 3783

Re: Cyclone 3000 vs CYC X1?

lukashanak wrote:
Nov 05 2019 4:18am
Now using 18s 18ah lipo (almost 2 years old. Not good now) and building 22s8p liion vtc5a pack.
What's your battery layout for 22S in such triangular shape?
Nucular doesn't work well with RC motors like X1 Pro, as I heard. It needs special firmware which is still not available.
by Andrewol
Aug 21 2019 12:17am
Forum: Items for Sale - New
Topic: Nucular electronics - complete kit for ev! [beta]
Replies: 1309
Views: 139677

Re: Nucular electronics - complete kit for ev! [beta]

Hi electric god.
Do you have X1 motor? Would be very interesting to know how bac2000 works in comparison with Nucular.
by Andrewol
Aug 17 2019 3:54am
Forum: Battery Technology
Topic: ENNOID-BMS for 48V to 400V lithium-ion battery pack
Replies: 202
Views: 31768

Re: ENNOID-BMS for 48V to 400V lithium-ion battery pack

Where to find the cost for 21S lion? On githud only 2 files available
by Andrewol
Aug 16 2019 2:16pm
Forum: Battery Technology
Topic: ENNOID-BMS for 48V to 400V lithium-ion battery pack
Replies: 202
Views: 31768

Re: ENNOID-BMS for 48V to 400V lithium-ion battery pack

Is it necessary to discharge overcharged cells during balancing? Perhaps better to share the current with undercharged ones via parallel connection. But there have to be some kind of relays between cells which can act as fuses. Or share the current with neighboring cells in sequential order untill a...
by Andrewol
Aug 07 2019 12:49am
Forum: Motor Technology
Topic: Serious FOCer (84V VESC 6 based controller)
Replies: 265
Views: 36649

Re: Serious FOCer (84V VESC 6 based controller)

If heatsink will be coupled to the bottom plate the last may flex from screws torque as it's thin and won't provide good contact area. Also there will be too much of thermal resistance between mosfet's die and external heatsink. Use the heatsink as a bottom instead. The best way would be to calculat...
by Andrewol
Aug 06 2019 5:15pm
Forum: Motor Technology
Topic: Serious FOCer (84V VESC 6 based controller)
Replies: 265
Views: 36649

Re: Serious FOCer (84V VESC 6 based controller)

You can screw the mosfets to a piece of alu or copper, than this piece to enclosure, as it's done in chinese controllers or integrate a heatsink in controller's housing.
Enclosure without heatsinking is not good, it will be hot.
by Andrewol
Aug 06 2019 10:27am
Forum: Motor Technology
Topic: Serious FOCer (84V VESC 6 based controller)
Replies: 265
Views: 36649

Re: Serious FOCer (84V VESC 6 based controller)

shaman wrote:
Aug 06 2019 6:02am
2kW/5kW respectively for the Little FOCer. These numbers are at a 75V volt supply.
Can the power little one be increased to 3kW\6kW respectively? 75V will be nominal or maximum?
by Andrewol
Aug 06 2019 12:14am
Forum: Motor Technology
Topic: Serious FOCer (84V VESC 6 based controller)
Replies: 265
Views: 36649

Re: Serious FOCer (84V VESC 6 based controller)

I thinks previous model was for Serious Focer? This one with xt60 Little Focer? You can try to lay down all film caps like elcos to make it more thinner.
Do you know any specs of SF? Power, erpm?
by Andrewol
Aug 05 2019 10:15am
Forum: Motor Technology
Topic: Serious FOCer (84V VESC 6 based controller)
Replies: 265
Views: 36649

Re: Serious FOCer (84V VESC 6 based controller)

With enclosure and heatsink it's going to be $40/50
by Andrewol
Aug 05 2019 8:30am
Forum: Motor Technology
Topic: Serious FOCer (84V VESC 6 based controller)
Replies: 265
Views: 36649

Re: Serious FOCer (84V VESC 6 based controller)

Do you mean $30-40 controller parts with pcbs cost?
by Andrewol
Aug 05 2019 3:51am
Forum: Motor Technology
Topic: Serious FOCer (84V VESC 6 based controller)
Replies: 265
Views: 36649

Re: Serious FOCer (84V VESC 6 based controller)

Shaman, do you know estimated boom costs to build Serious FOCer and little brother? Perhaps group buy would be preferable.
by Andrewol
Aug 04 2019 1:41am
Forum: Motor Technology
Topic: Serious FOCer (84V VESC 6 based controller)
Replies: 265
Views: 36649

Re: Serious FOCer (84V VESC 6 based controller)

what are the purpose and benefits of two 4-layer PCBs sandwiched together?
by Andrewol
Jul 12 2019 11:08am
Forum: Items for Sale - New
Topic: Nucular electronics - complete kit for ev! [beta]
Replies: 1309
Views: 139677

Re: Nucular electronics - complete kit for ev! [beta]

Do you estimated an approximate price for 24S li-ion bms?
by Andrewol
Jul 09 2019 1:48am
Forum: Motor Technology
Topic: Serious FOCer (84V VESC 6 based controller)
Replies: 265
Views: 36649

Re: Serious FOCer (84V VESC 6 based controller)

With such component placement density with 2 layer only, low volume run is there a real need for 4 layer layout? If it's DIY, power traces can be beefed up manualy at not much cost. Inner layers can't be used for power stages as bigmoose advised. Just a thought. If it's going to be open source diy, ...
by Andrewol
Jun 29 2019 8:14am
Forum: Motor Technology
Topic: Serious FOCer (84V VESC 6 based controller)
Replies: 265
Views: 36649

Re: Serious FOCer (84V VESC 6 based controller)

Yes, in similar manner like BESC but with mosfets holes direction to a center of pcb. They can be bolted from outside of enclosure.
Any updates with review?
by Andrewol
Jun 29 2019 6:25am
Forum: Motor Technology
Topic: Serious FOCer (84V VESC 6 based controller)
Replies: 265
Views: 36649

Re: Serious FOCer (84V VESC 6 based controller)

To save space you can reroute mosfets so they are bolted down under the pcb to a case. In such a way case width will remain the same, but provide slimmer design with improved thermal management solution.
Do you plan to add BT module for Android/iOS app control?