GoldenMotor.com Forum

General Category => General Discussions => Topic started by: Optima25 on October 08, 2009, 05:33:09 AM

Title: More than 48V for the 48V-Goldenmotor 1000W
Post by: Optima25 on October 08, 2009, 05:33:09 AM

I tried 67.2V - the speed is amazing! But I stopped after 5 minutes. To many doubts at the moment ..please help :-(

Title: Re: More than 48V for the 48V-Goldenmotor 1000W
Post by: Hardcore on October 08, 2009, 05:38:16 AM

i thought the magic controller was max 60v but you can overclock it to 80v, but it will get you nowhere and you'll probably end up in a wheelchair :-\

Title: Re: More than 48V for the 48V-Goldenmotor 1000W
Post by: Optima25 on October 08, 2009, 05:40:30 AM

who is talking about magic controller? I don't have this magic ...what is this???

I have Goldenmotor 48V 1000 Watt

Title: Re: More than 48V for the 48V-Goldenmotor 1000W
Post by: Bikemad on October 08, 2009, 08:23:45 PM

Quote from: Optima25 on October 08, 2009, 05:40:30 AM

who is talking about magic controller? I don't have this magic ...what is this???

This is what is sometimes referred to as the magic controller:

Quote from: GM Website

Magic! ... It can drive your ebike even with failed motor hall sensors, throttle, breaker, or all of them failed together!
It acts as sensorless controller when your motor hall effect sensors fail!

(http://goldenmotor.com/e-Bike-DIY/Cruise%20BLDC%20Controller.jpg)

Which controller do you have?

Alan

 

Title: Re: More than 48V for the 48V-Goldenmotor 1000W
Post by: Optima25 on October 09, 2009, 02:40:02 AM

oh my god - that is exactly the controller I have. Sorry I did not know that is called "magic controller" ;-)

I have the 48V Set. So can I use it also with a Lipo-batterie about 63V (when its full charged)

Title: Re: More than 48V for the 48V-Goldenmotor 1000W
Post by: Bikemad on October 09, 2009, 08:52:33 AM

Quote from: Optima25 on October 09, 2009, 02:40:02 AM

I have the 48V Set. So can I use it also with a Lipo-batterie about 63V (when its full charged)

Do you have any form of LVC on the battery?

The LVC on the controller is pre-set for a 48V battery and may not prevent your LiPo battery from being overdischarged.
Overdischarging a LiPo battery will decrease its lifespan and can cause permanent damage to the cells.

The recommended LVC for most LiPo packs is around 3.0V per cell.

Quote from: Wattflyer.com

When LiPolys first came out, the recommended LVC was 2.5V per cell. Once they figured out that the batteries didn't last long and often got so out of balance that they would catch fire while charging, the LVC recommendation was upped to 2.8V per cell. That wasn't enough either, so they upped it to 3.0V.

Alan
 

Title: Re: More than 48V for the 48V-Goldenmotor 1000W
Post by: Bikemad on October 09, 2009, 09:23:20 AM

Quote from: hardcore on October 08, 2009, 05:38:16 AM

i thought the magic controller was max 60v but you can overclock it to 80v, but it will get you nowhere and you'll probably end up in a wheelchair :-\

I presume this controller uses 63V capacitors, if so they will be overloaded at higher voltages.

Quote

The 63 Volts on the capacitor is the "Working Voltage (WVDC)". This is a rating as to how much voltage may be applied to the capacitor without damaging it.
(There is a small safety factor built in for a little bit more voltage)

A capacitor consists of two flat plates seperated by an insulator. A wire is connected to each plate. The WVDC is the rating on the insulator as to how effective it is. In this case it can insulate up to a 63 volt difference before it breaks down and allows conduction across it. 

If you exceed the stated working voltage, you risk damaging the capacitors!

Alan