I have two batteries in series with a circuit breaker in between to enable isolation for servicing. When the breaker is on/closed I read 2S voltage. When the breaker is off/open I read 1.95S volts. Breaker is rated plenty high for service voltage. Breaker appears to be functional, I verified by...
Ok so I have a string of 500 individually addressable LEDs that pull ~0.3W/LED (12V & up to 20mA). The total current draw for the 12V string should be roughly 12.5A if allowed to run at full power. The controller allows me to set a max current, right now I have it capped at 4A so the LED...
Hi All,
Curious if someone could tell me the typical diameter of a railcar axle. I believe the journal bearings are typically 6-1/2"x9 or 6-1/2"x 12, etc. Does the the 6-1/2" give any indication on axle diameter? If it helps the railcar in question is 4 axles rated for a max of 286klbs.
Thanks
Hello all,
I have an AC motor with a pretty straight forward torque/rpm curve. However I would like to estimate braking torque that can be applied by the motor. I am not so much concerned with how much power is regenerated but wasn't sure how the motor performance differs when used for...
Hi All,
Consider a typical 4-wheeled vehicle with motor/gears/axle assembly. How do I determine the force needed to start the vehicle rolling. Is rolling friction really the only force that you need to overcome to begin acceleration since aero forces are non-existent?
For example I have an...
Hello All,
So I am fairly new to designing electric vehicles and had a few questions.
So I am looking at a motor that specifies peak torque and continuous torque. What determines how long I can operate at peak torque (no times specified by manufacturer)?
