Closed Z1mmb0 closed 4 weeks ago
Z1mmb0
commented
3 months ago update: Ran the scooter 6km @500w. speed between 31-33. Motor barely touchable.
Tested w/o FWk and with FWk (init=1A var=0)
Also noticed: while dashboard app shows 11-12A the batterybar which is configured to show amp usuage basically shows 100% all the time.
Z1mmb0
commented
4 weeks ago update on shfw 3.9.1 so far:
Power measurement seems to be changed. Read ampere values went from 14A to 20A @38kph when recording with the app 'm365dashboard'. Drawn amps for Fwk dont appear though. If there actually was a bug in measuring the power, it now seems to correlate better with motor temps.
Motor temps overall seem to be slightly improved with the introduction of overmodulation. Target speeds can now be reached with lower Fwk flux.
Z1mmb0
commented
4 weeks ago closing this one
Scooterhacking Tool
Firmware (SHFW)
Type of issue
Performance issue
Severity of issue
high (major functionality broken, no workaround)
SHUT Version
2.5
SHFW Version
3.7.2
Scooter model
Xiaomi Pro, Pro2, 1s, essential, 3
Description of the Bug
First of all: sorry if this Ticket is BS but I feel like i have to point it out.
Motor overheats on "low" power. Im my past experience the motor handles 900W of constant draw pretty fine and doesnt get hot at all.
With the current shfw the motor surpasses heat levels beyond anything known. Power ~850w
Steps to Reproduce
precondition: -Pro2 scooter -48V battery -tested bms limits: 22A, 28A, 33A -8.5*3 semi offroad tyres -80-90 kg weight
Other settings: -DPC 21A (Also tried 15A and 16A) -Phase current limit (Iq limit) 45A (also tested 55A, 65A) -Fwk flux (Id) limit 20A -FWk: Init 1A, 200mA variable -Max speed 37-40 kmh -tested PWM frequency: 16, 20, 24 kHz -tested accel boost: 0% & 100%
Expected vs. Actual Behavior
expected:
Motor stays touchable and gets reasonably warm
Actual:
You cant touch the motor for even a second. 1 Motor died as its coils burnt.
Contact Information
discord: zimmbo