Hey John! Bernie from Castle says hello. I was on the phone with him yesterday asking some involved questions about my project bike and programming the HV110...
... Wide Open Throttle ... My understanding is that the servo pulses do not produce immediate response, it requires repeated pulses to respond thus reducing...
... ....It's a small world. Bernie had a hang glider acident some years ago and is paralized. He has an arm powered vehicle and plans to put his version of a...
... .....I spent the afternoon playing with various capacitor locations and values and looking at the spikes using high recorder rates. The spikes are no...
It is a small world for sure. I also mentioned Nic Case while on the phone with Bernie (Nic is the RC car land speed record holder). Nic is a friend of mine...
John Tetz was pretty accurate on his assesment of my e-bike. I got the bike together and did some no load testing of it. I could not ride it because it is dark...
... If peak eff. is at 2000W, it is using 5.6% as no-load losses and will have another 5.6% in IR losses when loaded so peak eff. will be 89%. When using less...
I got it running! Yeah, baby! This thing rocks! I have it geared for 30 mph currently. Here's some data; It uses roughly 325 to 350 milliamps per mile at an...
... is > about 15 watts. ........First of all congratulations on getting your system running. Exciting isn't it. Looking at you preliminary numbers 180 watts...
... ........According to the PDG spreadsheet if your bike has a CdA of 2.2 sqft, Crr .005, total weight 203 pounds, requires around 375 watts. Your putting in...
A couple things; #1 I ran the bike in both directions on the street outside my house. It is 1/4 mile long with a slight grade. It took 400 watts (a touch over)...
Mike you may want to add a pick up that gets a signal from a wheel and put it into the Eagle Tree datalogger. Then you can get more accurate speed values. I...
... house. ... .......yes your system is not exactly low power, but what yours and Dave Wrath-Sharmans show us is new possibilities. I'm very curious as to how...
... Not at all strange. The no-load current at your voltage is so high that you are operating at well below peak eff. most the time. That motor requires a...
... and ... spikes ... write it ... I anxious to see your report. I thought maybe adding a capacitor at the summing junction into the servo tester uC might...
If you have new cells you will find an increase in pack performance as your battery does indeed "wake up" over the first 5-10 cycles. Juergen...
Juergen Weichert
juergen@...
May 4, 2008 6:49 pm
394
Thanks for all the input, guys. I do apppreciate it considerably. This is my first E-bike project and as such, I am very open to input. I have begun to really...
Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the ULEA group. File : /Transient Spike...
ULEA@yahoogroups.com
May 5, 2008 1:09 am
396
... .......Hmmmm why would the efficency drop? Because the current is now fairly constant we can fine tune the motor design so it operates at this chosen...
... ......That would be kind of a crude way to solve a problem. That would add weight and would get real hot. It comes at the price of the battery having...
I already looked into that. How would I build it? If I built a slipper, it would only slip when teh throttle was banged hard in order to protect the drive...
... ......Do you have any experience working with electronic circuits? Got a soldering iron, wire, digital multimeter, etc? I had asked if you use a Servo...
Hi all. Congratulation Matt. I was a bit dishearten when you posted you finding on the no load current. But now it doesn't seem so bad, work to do but I think...
... Efficiency is defined as power out divided by power in. Without the limiter the power out rises as load increases and rpm drops and power in tracks the...
... Got ... John's limiter circuit should be easy to implement in your system since your are using the Astroflight servo tester. When shopping for a servo ...
... leak - ... week. ... ....Ah Ha !! That explanes your absence. I too am planting amount other things to do in this wonderful time of year. John Tetz...
I spoke with an electronic engineer I know yesterday. I was telling him about my bike and one thing led to another. He is coming by Saturday to look at all the...
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