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  1. Ebike brake lever cutoff switch / interrupt switch : How does it work?

    Electric Bikes
    Hi all, When pressing the brake lever on my ebike the bldc motor controller (aka ebike controller) 'cuts power' to the motor until the brake lever is released again/sensor is deactivated. I would love to know how that works/what happens. I am wondering what causes the power to be 'cut...
  2. Replacing obsolete/rare brakes, with something else?

    All EV Conversions and Builds
    Is it feasible to replace brake technology with something completely different? And how would a person go about even attempting such a thing? , We have an antique mid-1970s electric CitiVan, which is a bizarre little thing that has a top road speed of about 35 mph / 55 kph. It uses a type...
  3. Electric motor braking

    Technical Discussion
    For my tractor project, I need a reliable and simple way to provide braking, not only for slowing down while moving, but also as a parking brake. I will be using a three-phase induction motor with an inverter to step up 12V or 24V DC to about 270 VDC for the VFD. But it will be difficult to use...
  4. Audi A2 2004 conversion

    All EV Conversions and Builds
    I have finally decided on donor car and bought a 2004 Audi A2. It has a 1.4l petrol engine and a five speed transmission. Check out the garage at http://www.diyelectriccar.com/garage/cars/408 and the build blog at http://ev-a2.blogspot.com. Here is an image of the car. Nothing much has happened...
  5. electronic braking with alternator?

    Technical Discussion
    Can anyone tell me how much spinny resistance (tech word) an alternator has when it has no electrical load connected? if it is the same as a permanent magnet motor being used as a generator, it shouldn't have much if any resistance. i've looked for this idea on the forums here, and didn't find...
  6. Clutches...

    All EV Conversions and Builds
    It is my understanding that DC motors are not very good candidates for regen braking. This being the case, seems disengaging the motor entirely while going downhill would help in coasting situations, letting gravity do the work. Instead of pushing in the clutch pedal to coast, has anyone tried a...
  7. Brake Upgrade Options

    EV Information
    The combination of an increase in weight in an EV coupled with the lack of the plentiful vacuum that ICE provide means that in most cases some efforts must be taken to upgrade the brakes (this may even be required to register your vehicle). There are several options but the stopping power of...
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