Search found 97 matches

by Martin A
Jun 17 2019 11:25am
Forum: Large EV General Discussion
Topic: Three wheel steering
Replies: 5
Views: 1776

Re: Three wheel steering

What do you mean by smallest, lightest and hand controls?

Are you talking about hand pedals or a twist and go scooter style of drive?
by Martin A
May 03 2019 5:46pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Yamaha V Star 1100 Conversion
Replies: 33
Views: 2351

Re: Yamaha V Star 1100 Conversion

https://www.aliexpress.com/item/Silent-automatic-range-extender-4KW-5KW-6KW-7KW-8KW-48V-60V-72V-electric-car-three-wheel/32971612136.html?spm=2114.search0604.3.1.4ffc22e23fZrzl&ws_ab_test=searchweb0_0,searchweb201602_6_10065_10068_319_10059_10884_317_10548_10887_10696_10192_321_322_10084_453_10083_...
by Martin A
Dec 08 2017 6:09am
Forum: Motor Technology
Topic: Hi power inverter for Nissan leaf motor. Dyno's 302.3hp p15
Replies: 577
Views: 104231

Re: Hi power inverter for Nissan leaf motor. Dyno's 302.3hp p15

Isn't there a danger of overheating holding the motor at stall?

p.s. I know next to nothing
by Martin A
Jul 17 2017 1:19pm
Forum: E-Bike General Discussion
Topic: What scooter did Johns "Hubmonster" come out of?
Replies: 3
Views: 657

Re: What scooter did Johns "Hubmonster" come out of?

Why don't you ask him via a private message?
by Martin A
Feb 16 2017 1:36pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Electric Motorcycle (50cc Equivalant)
Replies: 57
Views: 17770

Re: Electric Motorcycle (50cc Equivalant)

Great work on the frame and engineering.

Even with a self build in the UK, if you use all new parts and can show the receipts you can register as a new build. This also means that you don't need an MOT test until the vehicle is three years old, from it's date of registration.
by Martin A
Nov 27 2016 12:57pm
Forum: E-Vehicles General Discussion
Topic: Formula E drivetrains ?
Replies: 54
Views: 7309

Re: Formula E drivetrains ?

Three of the top five in the championship currently single speed after two races, including the leader.
by Martin A
Jul 21 2016 1:07pm
Forum: E-Vehicles General Discussion
Topic: New heights of efficiency
Replies: 4
Views: 901

New heights of efficiency

The equivalent of a bit under 5500 mpg. That's German efficiency for you.

http://www.gizmag.com/tufast-student-ev ... 3-89811358
by Martin A
Jun 07 2016 7:21am
Forum: Motor Technology
Topic: 75-5 & 75-7 Motors - Looking for Test Engineers
Replies: 59
Views: 10554

Re: 75-5 & 75-7 Motors - Looking for Test Engineers

What are the dimensions of the motor and controller. I'm looking at building an Aprilia Magnet http://www.gizmag.com/go/3629/ inspired trike.
by Martin A
May 28 2016 8:11am
Forum: E-Scooter and Motorcycle General Discussion
Topic: Honda Ruckus conversion plans..
Replies: 20
Views: 7884

Re: Honda Ruckus conversion plans..

There will be more rpm per mile than calculated from no load information due to a smaller effective tyre diameter when the bike is loaded and the tyre flattens at the bottom.
by Martin A
May 10 2016 3:11am
Forum: General Discussion
Topic: Arlo's DIY inertia Dyno
Replies: 43
Views: 9593

Re: Arlo's DIY inertia Dyno

Is the dual controller bike motor 6 phase and being split into 2 x 3 phase like John in CR's Hubmonster?
by Martin A
May 09 2016 1:04pm
Forum: E-Bike Technical
Topic: Possible to share controller load onto multiple controllers?
Replies: 44
Views: 3174

Re: Possible to share controller load onto multiple controll

Thanks Alan and Amberwolf. Here's the thread for others who may be interested:

https://endless-sphere.com/forums/viewt ... w#p1168431
by Martin A
May 09 2016 10:21am
Forum: E-Bike Technical
Topic: Possible to share controller load onto multiple controllers?
Replies: 44
Views: 3174

Re: Possible to share controller load onto multiple controll

macribs wrote:Arlo1 I think posted this video of a Zero with close to double HP due to dual controllers.

Looks Awesome. What thread was this in?
by Martin A
May 01 2016 5:46am
Forum: Large EV General Discussion
Topic: My electric Triumph GT6
Replies: 49
Views: 9368

Re: My electric Triumph GT6

Traction was rarely a problem for me. I used Dunlop 165/70-13 Formula R tyres on 5 1/2 inch wide rims. Never tested it with a g meter but, I imagine might give more than 1g on the skidpad. Wasn't much that could stay with me in the twisties. Currently working on a project that I calculate should giv...
by Martin A
Apr 30 2016 8:11am
Forum: Large EV General Discussion
Topic: My electric Triumph GT6
Replies: 49
Views: 9368

Re: My electric Triumph GT6

For a simple improvement, swap the rotoflex for a very late GT6 or Spitfire 1500 swing spring set-up with the longer driveshafts. Make sure you fit the larger anti-roll bar from the GT6 or add an after market anti-roll bar to the rear. One esteemed british car magazine, either Autocar or Motor, comp...
by Martin A
Apr 08 2016 4:23pm
Forum: E-Vehicles General Discussion
Topic: AWD without differentials?
Replies: 32
Views: 4895

Re: AWD without differentials?

I read recently, although I can't remember where, that someone found that there was no particular problem with not being able to use torque vectoring on an AWD EV. I suspect it might have been about a formula student race car whose team had run out of time/funds/capability to program it in. The car ...
by Martin A
Apr 04 2016 5:21pm
Forum: Motor Technology
Topic: Conclusive proof gearboxes are awesome.
Replies: 790
Views: 85611

Re: Conclusive proof gearboxes are awesome.

how is "compensating" lack of torque on EV by using bigger motor any different to using the same method for ICE ?...... We don't need to look at the whole post here, just the first line, because with an EV the "compensating" removes the need for a gearbox and clutch or auto transmission. A bigger I...
by Martin A
Apr 03 2016 6:59pm
Forum: Motor Technology
Topic: Partial throttle and motor efficiency
Replies: 52
Views: 5886

Re: Partial throttle and motor efficiency

What is it that makes FOC controllers cost twice the price, the componentry or something else? That's a good question. Comparing a cheap cloned commodity knock-off of a BLDC trap controller to any first line product is fraught with problems. And re John's comment about Russian electronics - we have...
by Martin A
Apr 03 2016 4:01pm
Forum: Motor Technology
Topic: Partial throttle and motor efficiency
Replies: 52
Views: 5886

Re: Partial throttle and motor efficiency

What is it that makes FOC controllers cost twice the price, the componentry or something else?
by Martin A
Apr 03 2016 4:25am
Forum: Motor Technology
Topic: Partial throttle and motor efficiency
Replies: 52
Views: 5886

Re: Partial throttle and motor efficiency

Hi John (and everyone else) The video I referred to in my post higher up the page above was of Bluefangs bike with the two Sabvoton contollers on page 1 of this discussion. I was not referring to noise in any of your videos. I admire what you do and have followed your exploits and experiments with m...
by Martin A
Apr 02 2016 7:14pm
Forum: Motor Technology
Topic: Partial throttle and motor efficiency
Replies: 52
Views: 5886

Re: Partial throttle and motor efficiency

Yes I got a new 18fet Sinewave controller 100v 80amp controller 200.00 it's smooth and deadly quiet. Love seeing how that hubmonster quite down. Like magical. Unnecessary, you can't hear anything from the motor while riding unlike the rattletrap inefficient hubbies you're used to that sound horrend...
by Martin A
Apr 02 2016 9:04am
Forum: Motor Technology
Topic: Partial throttle and motor efficiency
Replies: 52
Views: 5886

Re: Partial throttle and motor efficiency

In the topic: Looking for a perfect motor controller? gather here
Bluefang wrote:
Just put a pair on my motorbike driving a Hub-monster. Soooooo much smoother and quieter. I am in love with sine wave controllers.

Was this one of John's Hub-monsters with two sabvoton controllers?