Did you note the battery ( PSU) current in your test?
fechter wrote:The actual processor is a bit of a mystery as the number does not come up on any searches.
Supposedly it is the same as a PIC16F72, rated for 20mhz.
computerpc101 wrote:Clock test
36 volts LVC enable
- LED blink 8 time and pause one
No Xtal or Resonator
- no blinking at all
16MHZ Xtal or resonator
- LED blink and pause about 5 times @ 30 second
27MHZ Xtal or resonator
- LED blink and pause about 8 times @ 30 second
It seems that MCU responses to Xtal or resonator speed
- It might be that proble from single generator acts as resonator for low frequency
shinyballs wrote:hey knuckles,
not sure if you read my last question.... I'll repeat again -
Is the Bafang geared motor available in other gearing configurations? i.e. for high speed
I too tried the blinking light test proposed by fechter. I started at 16 MHz clock and went up insteps of 4 MHz.
One time I got to 48 MHz, 8 very fast flashes. I even managed to raise the volts above cut off, start and stop the motor and go back down below cut off and get back to the 8 fast flashes.
But another time, it lost the plot somewhere between 36 and 40 MHz and wouldn't recover until the power had been cycled.
solarbbq2003 wrote:bafang only make one gear ratio, but have different rpm motors, to suit from 16" up to 26", I think rpm no load varies from about 160rpm up to 320rpm ( bit of a guesstimate), not sure how they vary the rpm of motor, whether its number of poles, or something else.
solarbbq2003 wrote:oh very interesting I didn't know that was all needed to vary rpm
oatnet wrote:BTW, I have had bad luck with torque washers, I would be very leery of them. The ones I used flattened out and helped march the front wheel out of the dropouts. Fortunately I was just turning in the street when I failed, at speed it would have been catostrophic. Check your bolts every ride until you can get to a torque-bar!
docnjoj wrote:Hey Knuckles! Hows the noise level ot the geared motor compared to the regular hub? I'm a quiet freak!
Knuckles wrote:Push either type motor too hard and, bammo! Ã¢â‚¬Â¦ Blown hall sensors. IMO the Bafang PMGR and Grubee DD motors should never be pushed beyond 72V & 30-amps. Even if you replace the wire harness with thicker phase wires (highly recommended btw. See ... viewtopic.php?f=2&t=4626), 2000W into the motor is about the max you can go without overheating the motor and blowing the hall sensors.
NEVER RUN THE BAFANG ABOVE 30 AMPS!
Hey, Maybe we should commission the Bafang Company to build a 5KW PMGR that we can push to 20KW!
shinyballs wrote:I wonder if a Kelly brushless controller works with the Bafang motor. With its insides fully potted, it may be difficult to test... Any brave soul up to it?
voicecoils wrote:The smallest 72v Kelly (https://www.kellycontroller.com/shop/?mod=product&cat_id=22&product_id=152) 60A continuous, 100A maximum.
The7 wrote:voicecoils wrote:The smallest 72v Kelly (https://www.kellycontroller.com/shop/?mod=product&cat_id=22&product_id=152) 60A continuous, 100A maximum.
For Bafang (with 10 pole-pairs and gear ratio 4.3:1)
the max hub rpm = 698 rpm
K-controller should be OK for Bafang motor.
aaannndddyyy wrote:After using the Ecrazymans 48volt 28amp controller with the 24 MHz 3 PIN CERAMIC RESONATOR, fitted to an Ezee sprint Brushless 350 watt motor for the last week. The throttle seems a little unstable at low revs, it stays at a stable speed for a couple of seconds then accelerates slightly for a moment then back down to the stable speed again it may be doing the same thing at higher speeds but isnÃ¢â‚¬â„¢t so Noticeable, is this because of the resonator? Or perhaps a wiring problem, I have changed the throttle over with a different one with the same affect and checked the connections. By the way under no load testing this problem doesnÃ¢â‚¬â„¢t show up.
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