well, regen does provide SOME braking, but not as much as you think.... Its hard to explain, but if you want to really provide some stopping power, you must provide some where to PUT all that extra power. Brake resistors are used across the coil to resist the flow and increases the braking power.
I have to talk with a few designers a little bit and get everything on paper. regen is a term used FROM the motor leads as seen by the controller. Some device is trying to inject current and voltage into the controller. If you try to IMPEDE that with a resistor, it slows the motor. if you use that to inject into batteries, you don't WANT resistance and the circuit should have a low reistance, so its not going to slow you down as well. You can put it back into the battery, but it won't provide the resistance needed to be used as a BRAKE. It will slow you down SOME but not like a rear brake would. let me talk a bit with an old designer friend and get back with you guys. On 6/22/07, john fisher <[EMAIL PROTECTED]> wrote:
Travis AFAIK there was an opensource controller project thats might be now be tired, and on the evdl list Lee Hart has taken primary place with controller design (but he hasn't actually finished anything) . There is new opensource battery management list ( there being a greater need for BMS since there basically aren't any for EVs) thats at [EMAIL PROTECTED] Now, I don't understand your goal here. Why would I want to use an electric brake that doesn't regen? I mean I just wrote that I don't even want to rear-brake on a bike anyway, but supposing I did ( or I was building a 3-wheeler), why do anything but regen? Maybe I misunderstood? John Travis Gintz wrote: ... > > My idea is to drive the drivers PWM as normal, but when coasting, > regen. When the brake is applied, apply a small resistor to act as a > brake. it'l dissipate energy, and waste it, but it'l also allow you to > stop without use of the brakes, or at least in adddition to (bigger > resistors will lock the motor and throw you off). > > ...
