Search found 178 matches

by cor
Aug 06 2014 12:15am
Forum: E-Bike Non-hub Motor Drives
Topic: 28,000 watt Motoped with 3kwh of nano-tech
Replies: 239
Views: 38948

Re: 25,000 watt Motoped with 3kwh of nano-tech

Hi Matt, I have a concern about the layout of the belt. I admire how you route it around the 2 motor sprockets in a very compact space, but I see the belt run up and down almost the entire distance to the top motor and with the teeth facing each other at very close distance. I expect that any vibrat...
by cor
Jun 18 2012 3:35pm
Forum: E-Bike Technical
Topic: OK to run my OEM 24V EVG at 36V?
Replies: 30
Views: 1607

Re: OK to run my OEM 24V EVG at 36V?

Hi DC, I heard (but have not checked myself) that it is the processor that dies, because it is run at 6V while it is a 5V device. Another reason why it may die is because several inputs and outputs are wired directly to different parts of the bike, these might be subject to ESD (Electro Static Disch...
by cor
May 08 2012 4:19pm
Forum: E-Bike Technical
Topic: blown mosfet on 35a infineon controller?
Replies: 20
Views: 1439

Re: blown mosfet on 35a infineon controller?

Is there current flowing in *all* phase wires or only 2 of them? If the MOSFET driver circuit was blown together with the MOSFET blowing, that would cause one phase to not have current and on only 2 phases the motor would not run, but will give higher resistance. Another check is whether the hall se...
by cor
May 08 2012 12:53am
Forum: E-Bike Technical
Topic: Infineon Controller 35A Dead!
Replies: 16
Views: 736

Re: Infineon Controller 35A Dead!

You already have located the blown MOSFETs: between + and A-phase! I have a small (6-FET) controller on a standard Chinese E-bike. The first time I ran it, within 100 meters it stopped and the battery self-protected (switched off). I checked and it had a similar problem - one shorted FET between the...
by cor
May 08 2012 12:35am
Forum: E-Bike Technical
Topic: Controller Doesn't Turn Off
Replies: 19
Views: 612

Re: Controller Doesn't Turn Off

i disagree. show me where there is a current drain on a controller with the circuit current turned off. you have an ammeter in your digital volt meter, use it and prove your distortions. there are people who read these posts and may believe what you say. so prove it or retract it. Wow, rather harsh...
by cor
May 07 2012 11:58pm
Forum: E-Bike Technical
Topic: OK to run my OEM 24V EVG at 36V?
Replies: 30
Views: 1607

Re: OK to run my OEM 24V EVG at 36V?

I used an old dead controller at 36v (it wouldn't power a motor any longer or give warning beeps etc. but it still worked just to run the lights and horn). OK, you were essentially only using the glass fuse on the main board, not the plug-in controller cards. You will find that you can save some we...
by cor
May 07 2012 11:54pm
Forum: E-Bike Technical
Topic: OK to run my OEM 24V EVG at 36V?
Replies: 30
Views: 1607

Re: OK to run my OEM 24V EVG at 36V?

Curious thing that maybe you guys can shed some light. I am currently riding my other EVG - 36V stock machine. It climbs fine with enough battery. But, will eventually give the 3 Beeps every 20 seconds and, if, you keep going, it begins to just wind down on its power (current limiting I suppose) re...
by cor
May 07 2012 11:40pm
Forum: E-Bike Technical
Topic: OK to run my OEM 24V EVG at 36V?
Replies: 30
Views: 1607

Re: OK to run my OEM 24V EVG at 36V?

about using the 24v controller at 36v for accessories, from my experience the short answer is no. I used an old dead controller at 36v (it wouldn't power a motor any longer or give warning beeps etc. but it still worked just to run the lights and horn). my findings were: the horn developed problems...
by cor
May 07 2012 11:26pm
Forum: E-Bike Technical
Topic: OK to run my OEM 24V EVG at 36V?
Replies: 30
Views: 1607

Re: OK to run my OEM 24V EVG at 36V?

dnmun wrote:... the 3 schottky diodes on that heat sink. no idea why they are there, maybe part of the voltage regulated output for the lights.
The diodes are part of any DC controller, they carry the motor current while the transistors are off. (Basically it is a Buck converter with the motor as inductor).
by cor
May 07 2012 11:04pm
Forum: E-Bike Technical
Topic: blown mosfet on 35a infineon controller?
Replies: 20
Views: 1439

Re: blown mosfet on 35a infineon controller?

Hi jansevr You asked: would it be possible or make more sense to change the mosfets (i understand i would have to change them all) As others have indicated - yes - changing all MOSFETs for higher current/lower resistance versions can improve the current handling and keep the controller cooler. BTW, ...
by cor
Apr 20 2012 12:00pm
Forum: Battery Technology
Topic: Increase Meanwell Voltage Range
Replies: 9
Views: 1146

Re: Increase Meanwell Voltage Range

You could slow down the fan, but often the best way to make a noisy fan silent is to remove the noisy fan and put in a silent fan, since it is the design of the blades (mostly) and speed that causes the noise, so a quiet design is needed, not a slow-running noisy fan as that will also impair the coo...
by cor
Apr 20 2012 10:42am
Forum: E-Bike General Discussion
Topic: I picked up a 24v Lee Iacocca EVG Ebike
Replies: 121
Views: 21214

Re: I picked up a 24v Lee Iacocca EVG Ebike

I do not know which state you are in, but AFAIK, California requires a helmet when riding an e-Bike (not a regular bike unless you are under 18)
by cor
Apr 04 2012 12:32pm
Forum: Battery Technology
Topic: Increase Meanwell Voltage Range
Replies: 9
Views: 1146

Re: Increase Meanwell Voltage Range

Hi Degull, I see that ZD53 and ZD52 are in series, so their voltages add up to give the protection voltage of 29V. You can either take the part nr of the zener you removed, or measure its zener voltage by connecting it to your supply with about 10kOhm resistor in series. Say that it shows it is a 12...
by cor
Apr 04 2012 8:57am
Forum: Battery Technology
Topic: Lipo Scare
Replies: 17
Views: 1443

Re: Lipo Scare

It's not just you lipo guys. Any one running higher voltages, regardless of chemistry, makes one hell of a spark. I know mine scared the sh*t out of me when mine did! Even at 30V you get a bad spark if the input of the controller has a big capacitor and you connect the pack directly. So, I soldered...
by cor
Apr 01 2012 12:12pm
Forum: Battery Technology
Topic: A123 20Ah Quebec Group buy(Canada) cells ARRIVED 24.57$/cell
Replies: 213
Views: 31159

Re: A123 20Ah Quebec Group buy(Canada) cells ARRIVED 24.57$/

For long life use, every lithium cells have some preferences. They don’t like heat so keep them between 10 and 25 celsius to prolong their life. They don’t like being too much time at full SOC and being depleted so keep them in a range between 80-20% SOC. Doc Hi Doc, Do you know the temp spec of th...
by cor
Mar 30 2012 6:12am
Forum: Battery Technology
Topic: Meanwell NES Schematic..almost complete
Replies: 115
Views: 17366

Re: Meanwell NES Schematic..almost complete

I posted pics some time ago to show that
R134 is SMT
where i suggest to cut the trace
so you can solder wires to adjacent pads
by cor
Mar 22 2012 3:56pm
Forum: E-Bike General Discussion
Topic: I picked up a 24v Lee Iacocca EVG Ebike
Replies: 121
Views: 21214

Re: I picked up a 24v Lee Iacocca EVG Ebike

OK, I took a piece of about 3" of a relatively new but damaged tube (that was on this same rear wheel earlier) and roughed it up with sand paper, then also roughed the inside of the tire around the cut, applied shoo goo on both the tire and the old tube and stuck the tube against the inside of the t...
by cor
Mar 11 2012 5:03pm
Forum: Items for Sale - New
Topic: Fechter's Mini Meanwell Limiter V.3
Replies: 210
Views: 29771

Re: Fechter's Mini Meanwell Limiter V.3

Hi Megacycle, did you measure its resistance? (easy to do with the 4-point connection method of sending a known current, for example 10A, through it and use a milliVolt meter to measure how much voltage drop that 10A gives, each 10mV is 1 mOhm) I am concerned that this AC circuit part does not have ...
by cor
Mar 10 2012 6:48pm
Forum: Items for Sale - New
Topic: Fechter's Mini Meanwell Limiter V.3
Replies: 210
Views: 29771

Re: Fechter's Mini Meanwell Limiter V.3

Hey Fechter, got a opposite problem to most, where i'm wanting to limit around 130+ amps on a RSP3000/24V. Was thinking i might need to seperate the circuit board from the shunt/s.... Hi Megacycle, I think you have the right solution - you can't send 130A through the traces of the current limiter b...
by cor
Mar 02 2012 12:45am
Forum: Battery Technology
Topic: leaderhobby LiPo packs? Has anyone experience with?
Replies: 127
Views: 9952

Re: leaderhobby LiPo packs? Has anyone experience with?

Sorry - I forgot to put my location in my profile.
Indeed, I am in Silicon Valley (San Francisco south bay area) in California.
Neptronix has one pack for me, anybody else having packs with bad cells or just unusable packs?
by cor
Feb 29 2012 5:08pm
Forum: Battery Technology
Topic: leaderhobby LiPo packs? Has anyone experience with?
Replies: 127
Views: 9952

Re: leaderhobby LiPo packs? Has anyone experience with?

Anybody has Li-Poly packs that they can send over quickly? Don't care about condition...
by cor
Feb 29 2012 5:05pm
Forum: E-Bike General Discussion
Topic: Do you use a mirror?
Replies: 46
Views: 2220

Re: Do you use a mirror?

Bicycle brakes are arranged for hand signalling. Rear on curbside. Front on signalling hand side. My EVG bike has stock brakes and front brake is right as I am used to - I have always ridden European bikes until 8 years ago. I think I would swap cables if front would be on the left brake handle or ...
by cor
Feb 29 2012 4:58pm
Forum: E-Bike General Discussion
Topic: Do you use a mirror?
Replies: 46
Views: 2220

Re: Do you use a mirror?

Flying down a hill over 30mph I'm not so keen turning my head in the slightest, so I started using mirrors I understand that, I was quite happy that the EVG has a mirror during my experiment to climb the Santa Cruz mountains, especially during parts of the descent where I reached up to 50 MPH - the...
by cor
Feb 29 2012 2:31am
Forum: E-Bike General Discussion
Topic: Do you use a mirror?
Replies: 46
Views: 2220

Re: Do you use a mirror?

I mostly commute by bike (have two BMW 5-series, but like it better to ride than drive) so I do between 22 and 30 miles a day (35-50 kms) mostly just me pedaling but I like it whan I can open a throttle to help me up a nasty overpass, especially if it is a freeway interchange like I have at least on...
by cor
Feb 28 2012 1:31am
Forum: E-Bike General Discussion
Topic: Do you use a mirror?
Replies: 46
Views: 2220

Re: Do you use a mirror?

Been riding bicycles for 42 years without mirror. Recently bought an EV Global (Lee Iacocca) and that came with a good mirror - slightly wider angle of view than the mirror width due to it being a little spherical. Perfect. When I get on one of my other bikes I miss that sense of constantly knowing ...