New victim came in the mail yesterday:
It's a starter/generator "altermotor" from a hybrid. Rated at 10kw!
@200-odd volts, so good for about 50 amps (at whatever voltage up to 200 that you can supply) continuous. Brushless DC. Water cooled. Weighs in at all of 27lbs. It's a couple of inches bigger in each dimensions than a standard, full-size alternator.
Found dirt cheap (for these numbers) on ebay. Once I found out that it was a BLDC motor, I had to have it. The little bit of cogging as I turned the pulley confirmed it as such.
Spun it with my drill, hooked up to a rectifier, and it put out 40v @1350 rpm, ~33 rpm/V. Lower than most of my reasonably high-powered DC motors. NICE!
No hall effect sensors, unfortunately:
But hey, I have ebike controllers that can run sensorless. Sooooo...time to hack together a bench test:
Results:
Best part:
It was only drawing 0.81 amps, even without sensors. That's as good as anything I've hooked up
with sensors. Most of them, without sensors, end up pulling ~1 amp for every 10 volts thrown out. Gets quite wasteful when you're throwing 80 or 90 volts at them. I expected it to be efficient, but not without sensors.
This is nice. I can put it to work without messing around with hooking up hall sensors for now. Don't have to worry about over-revving it (might have to worry about the controller, but not the motor). Totally thrilled with it, so I ordered another!
Ok, back to your regularly misguided programming.
