Search found 116 matches

by ron van sommeren
Jul 07 2017 8:18am
Forum: Motor Technology
Topic: too long battery wires will kill controllers
Replies: 36
Views: 5252

Re: too long battery wires will kill controllers

User craigsj retracted his posts, and himself it seems.

edit: aha, this thread explains it, sort of
When ES members leave and delete posts - ES

Prettig weekend ;) Ron
by ron van sommeren
Jul 03 2017 5:14pm
Forum: Motor Technology
Topic: too long battery wires will kill controllers
Replies: 36
Views: 5252

Re: too long battery wires will kill controllers

Since 2008, I added more info, and changed the layout. too long battery wires will kill ESC over time: precautions, solutions & workarounds - RCG Contents Solution I & II, rules of thumb Problem Capacitor type & polarity (orientation!) How & where (not) to add extra capacitors DIY capacitor pack pic...
by ron van sommeren
Jul 03 2017 4:54pm
Forum: Motor Technology
Topic: Winding a large paraglider motor, with video of 1st flight
Replies: 1
Views: 500

Winding a large paraglider motor, with video of 1st flight

By Christo van der Merwe (a.k.a. Skylar) DIY paraglider motor 160x25mm stator (2016) Weight: 4kg Prop: 1.2m, RPM: 2300, Thrust: 43kg Battery: 12S LiPo, Current: 140A, Power: 6580W See http://www.rcgroups.com/forums/showthread.php?2762266-Winding-a-large-stator-Paraglider-Motor-Video-of-first-flight ...
by ron van sommeren
Sep 21 2016 7:38am
Forum: Battery Technology
Topic: 3 x 3s batteries wired in series how to balance charge them
Replies: 5
Views: 503

Re: 3 x 3s batteries wired in series how to balance charge t

' Multiple choice ' hook-ups 'Multiple choice' wiring diagrams, charger selection tools, instructive demo's, calculators ... www.scriptasylum.com → RC calculations http://static.rcgroups.net/forums/attachments/3/0/1/8/a8330237-181-rccalculations.jpg → electrical → LiPo pack wiring → Balance Connector
by ron van sommeren
Sep 13 2016 10:42am
Forum: Motor Technology
Topic: LeoMotion motors
Replies: 0
Views: 482

LeoMotion motors

http://www.leomotion.com

L9038-130
L9038-1-00Y_gr.jpg
L9038-130
L9038-1-00Y_gr.jpg (69.47 KiB) Viewed 482 times
L9025-130
10328_gr.jpg
L9025-130
10328_gr.jpg (72.91 KiB) Viewed 481 times
by ron van sommeren
Sep 12 2016 12:46pm
Forum: Motor Technology
Topic: NeuMotors 70→150cm³ eq., and 1000→2000W coaxial
Replies: 13
Views: 1657

NeuMotors 70→150cm³ eq., and 1000→2000W coaxial

See NeuMotors discussion thread - RC Groups http://www.rcgroups.com/forums/showthread.php?t=2734532 & http://www.neumotors.com http://static.rcgroups.net/forums/attachments/5/8/8/t9318989-44-thumb-DSCN1051.jpg?d=1473182979 http://static.rcgroups.net/forums/attachments/5/8/8/t9318992-134-thumb-DSCN10...
by ron van sommeren
Jun 17 2013 2:11pm
Forum: Motor Technology
Topic: Plettenberg Nova motors and MST controllers: 15, 30, 150kW
Replies: 93
Views: 25049

Re: Plettenberg Nova motors and MST controllers: 15, 30, 150

Have they raced in an egrandprix with the bike? From www.plettenberg-motoren.net/index.php/en/motor-serias-nova/motor-serias-nova-150 ... Dabei haben die Erfahrungen aus dem Hochleistungs-Modellsport, die in den vergangen Jahren zum Gewinn von mehreren Weltmeistertiteln führten, zur Entwicklung der...
by ron van sommeren
Jun 14 2013 8:14am
Forum: Motor Technology
Topic: Plettenberg Nova motors and MST controllers: 15, 30, 150kW
Replies: 93
Views: 25049

Plettenberg Nova motors and MST controllers: 15, 30, 150kW

Plettenberg Nova series: 15, 30 and 150kW www.plettenberg-motoren.net/index.php/en/motor-serias-nova http://static.rcgroups.net/forums/attachments/3/0/1/8/t5854519-65-thumb-Nova_30.jpg Plettenberg MST controllers: 30/40kW and 120/160kW www.plettenberg-motoren.net/index.php/en/motor-control http://st...
by ron van sommeren
Jul 31 2012 1:03pm
Forum: Electric Aircraft
Topic: Electric Lazair Takes Flight
Replies: 12
Views: 8744

Re: Electric Lazair Takes Flight

Dale flew his eLazair at Oskosh http://www.rcgroups.com/forums/showthread.php?t=1412424&page=37#post22314815 http://www.airventure.org/news/2011/110727_lazair.html http://www.lazairinfo.com -> eLazair Vriendelijke groeten ;) Ron • diy motor tips • Drive Calculator • • diy motor group • Cumulus MFC •...
by ron van sommeren
Nov 02 2011 12:15pm
Forum: Motor Technology
Topic: Updated Cap choices for high power motor controllers Updated
Replies: 92
Views: 31592

Re: Updated Cap choices for high power motor controllers Upd

Castle Creations and MGM Compro capacitor banks: http://www.rcgroups.com/forums/showthread.php?t=952523&page=30&pp=10#post19610747 Castle Creations rule of thumb versus Ludwich Retzbach's rule of thumb: http://www.rcgroups.com/forums/showthread.php?t=952523&page=32&pp=10#post19653752 Prettig weekend...
by ron van sommeren
Jun 15 2011 2:50pm
Forum: E-Bike Non-hub Motor Drives
Topic: 70mm monster Scorpion in the works
Replies: 25
Views: 3270

Re: 70mm monster Scorpion in the works

Joe90 wrote:... it's the guys pushing them to the limits and applying low speed, high amp loads on them that causes reliability issues. ...
About de-rating controllers and motors, starting at 'for everyone else':
http://www.rcgroups.com/forums/showthre ... st11476940
by ron van sommeren
Jun 14 2011 1:02pm
Forum: Motor Technology
Topic: Help in making my BLDC controller
Replies: 186
Views: 17625

Re: Help in making my BLDC controller

The higher the PWM frequency, the lower the current ripple, the lower the losses for the same average current.

See
Wikipedia: crest factor
-> PWM signal

Figure below from
http://www.consult-g2.com/
-> course
-> chapter 9, electronic controllers
,
by ron van sommeren
Jun 09 2011 1:33pm
Forum: Motor Technology
Topic: How Motors Work - some educational links
Replies: 14
Views: 31653

Re: How Motors Work - some educational links

See http://www.consult-g2.com/course.html CHAPTER 1: MAGNETIC PRINCIPLES 1.1 Introduction 1.2 Magnetic circuits and the design equations 1.3 Sample calculation of magnetic flux design in a gap 1.4 The B-H curves of PM materials 1.5 Excursions of the operating points 1.6 Energy product and maximum en...
by ron van sommeren
Jun 08 2011 12:26pm
Forum: Motor Technology
Topic: Help in making my BLDC controller
Replies: 186
Views: 17625

Re: Help in making my BLDC controller

Gents, check out the remarks about (RC) BLDC controllers in this thread, ignore the motor:
http://www.endless-sphere.com/forums/vi ... 28&t=28868
by ron van sommeren
Jun 08 2011 9:50am
Forum: E-Bike Non-hub Motor Drives
Topic: 70mm monster Scorpion in the works
Replies: 25
Views: 3270

Re: 70mm monster Scorpion in the works

liveforphysics wrote:... Those single layer SMT fet controllers wouldn't last 20 seconds of low-speed operation on a motor with low resistance and inductance. ...
Bring bike up to a certain speed and then 'engage' the controlle? Possibly with a slow ramp-up in speed too? Disable controller below a certain speed?
by ron van sommeren
Jun 07 2011 2:43pm
Forum: Motor Technology
Topic: Help in making my BLDC controller
Replies: 186
Views: 17625

Re: Help in making my BLDC controller

kfong wrote:... Ron do you have an ebike? ...
No e-bike, not even a (petrol or e) car.
kfong wrote:.. What do you do with your all your motors? ...
Never built one. All I do is collecting information/developements and disseminate it again. Kind of librarian?? Being an EE certainly helps :)
.
.
by ron van sommeren
Jun 07 2011 1:37pm
Forum: E-Bike Non-hub Motor Drives
Topic: 70mm monster Scorpion in the works
Replies: 25
Views: 3270

Re: 70mm monster Scorpion in the works

Grrrrmbl&^%@(!!! :)
translate...www.sinusleistungssteller.de then ? Under References/Projects some very nice videos of traction applications (quad, shovel) and GeeBee racer. Sinusoidal commutation, not trapezium.
by ron van sommeren
Jun 07 2011 9:49am
Forum: E-Bike Non-hub Motor Drives
Topic: 70mm monster Scorpion in the works
Replies: 25
Views: 3270

70mm monster Scorpion in the works

.
70mm diameter and 50m long stator:
translate...www.powercroco.de
-> motors
-> Scorpion kits customized
-> 7050 big block

Picture: 7050 and 4535 motor
by ron van sommeren
Jun 07 2011 8:40am
Forum: Motor Technology
Topic: Help in making my BLDC controller
Replies: 186
Views: 17625

Re: Help in making my BLDC controller

Compilation of diy brushless controller designs:
www.rcgroups.com/forums/showthread.php?t=140454

Excellent active discussion:
www.rcgroups.com/forums/showthread.php?t=200567

Active group, be sure to check out the files section:
www.yahoogroups.com/group/osmc