Any vendor that supplies adequate information?

[slacker]

thank you, have not heard good thing's about dillenger. peace out.

 

[Graham641]

The e-bike that I purchased came with no instructions for anything. I finally found a manual for the C965 display with 5 button controller. The manual does not seem to be written for this display since I cannot change the functions as the manual outlines. That is a problem but now that I see where the designers head is in the configuration I will figure it out. My next problem is the speed sensor. I recently threw the chain and while in the process of rerailing it I must have moved the sensor pickup. I started getting an error message and speed readout was stuck at something like 21 kmh. The sensor has a three wire input with a red LED. I am not sure what the LED is for. I don't believe that they would have designed a photo interrupter in that kind of environment. I assume, despite the LED, that it is a simple hall effect switch. I tried to adjust the sensor when I was getting an error but could not seem to find a sweet spot. I cannot find data on this device because I do not know the manufacturer so do not have specifications. The guy who put the bike together had used electrical tape around the magnet even though it seems to have a good set screw to the spoke. I keep trying to get simple information on the whole system. There does not seem to be any information out there. I cannot believe that it is proprietary because it is a very simple system. The motor is supposedly water sealed and the controller/driver is internal. I would like to take a peak at the circuit board but am not sure that I will reseal it correctly and I do not want to void the warranty. For the same reason, I have not changed the software and a little spooked to do it without knowing the driver specs. Has anyone else had similar problems?

 

[dustNbone]

You've described a Bafang BBS01/02. It's not super well documented by the manufacturer but it is used by many ES users including myself. Search on this forum for much more info regarding this drive unit, most problems with it have been discussed at some length.

 

[Graham641]

Actually it is a Bafang BBSHD 1000W, As I understand it, the other versions have an external driver card. I have an internal driver circuit driven with a 58.8 volt battery pack. Many of my questions would be answered if I could reverse engineer the driver card. I read where people continue to add more voltage/current to the motor but if no one knows the maximum rated value of the mosfet drivers then how do they know when they have exceeded the rated voltage of the driver? I can not find any documentation. I would think that Bafang would have produced, at least, a manual for service centers.

 

[Graham641]

How do you define adequate? An on line installation manual? A live person on CS? Information how to hack the controller programming? A schematic allowing competitors to know proprietary information?

When a product is sold, electromechanical, mecahnical, electronic or otherwise normally the manufacturer supplies physical data, maximum allowable voltage and current. In this case, driver limits as well as connection configuration. Go look up an off the shelf motor and you will see all of the data required to use the product without destroying it. In my case, I want to use the motor for a non- bicycle application. I am most sure that they are not doing anything proprietary. I spent many years designing and developing test procedures for fractional horsepower BLDC's. The power of a bldc is directly related to the magnetic material and magnetizing technique. I have ask Bafang a number of times for volt, current torque and rpm. There is nothing proprietary about data such as that. No one is going to steal the design. If you can afford the equipment to produce these motors you certainly can afford an engineer who could build a nice little motor and the manufacturers of the integrated circuits to drive the motors comes free with about 40 pages of data, schematics, board layout as well as power factor corrections. I have written bafang a number of times simply asking for the standard curves that other motor manufacturers send with the product.I have evaluated various loudspeaker using the data published with the loudspeaker. In that field there is proprietary information but performance data is offered freely. I just ask for performance specifications on the motor. That cannot be proprietary. Bafang has not shown the courtesy of even a response. The idea is...I will pay the asking price for the motor and you send me the data on how it may be used. That is how the engineering world works. It would be nice to know what is going on with the driver circuitry. It is similar to a car hobbyist wanting to get a little more power just for the fun of it. It would also be nice to repair your machine without relying on someone who really does not know what is going on. I would have gone through the driver circuitry but it is inside of the motor casing which is supposed to be water resistant and I don't want to ruin the seal. I would consider that as adequate information.