Timma2500
1 kW
Any idea how much these modded controllers will cost John? What would their amp limit be?johnrobholmes said:We are looking at a few controller options (none are sensorless).
Paul
Any idea how much these modded controllers will cost John? What would their amp limit be?johnrobholmes said:We are looking at a few controller options (none are sensorless).
johnrobholmes said:We are looking at a few controller options (none are sensorless). Right now it looks like the most available sub 100v option will be a XieChang based controller with 4110 fets. I will be installing this motor with a 5:1 single stage geardown on one of my bikes, and going from 50v up to whatever I can muster and handle. My motor is being wound at 50kv, and I think Matt will be trying one at 100kv. My goal is to have a motor that is 100% reliable with a single geardown stage. The secondary goal is a motor to kick everybody's ass at the death race. I think I can do both with this Astro/ Shumaker halfbreed.
Gary!!!GGoodrum said:Since heat losses go up as a square function of the current, this motor will run a ton cooler at 100-110A than it will at 300A+.
GGoodrum said:johnrobholmes said:We are looking at a few controller options (none are sensorless). Right now it looks like the most available sub 100v option will be a XieChang based controller with 4110 fets. I will be installing this motor with a 5:1 single stage geardown on one of my bikes, and going from 50v up to whatever I can muster and handle. My motor is being wound at 50kv, and I think Matt will be trying one at 100kv. My goal is to have a motor that is 100% reliable with a single geardown stage. The secondary goal is a motor to kick everybody's ass at the death race. I think I can do both with this Astro/ Shumaker halfbreed.
Lyen has a 4115-based model that is good for up to 150V, right out of the box, that could be beefed up fairly easy to run up to 120A, or so. I'm thinking a 30s or 32s pack would be just the ticket. Even at 4.2V per cell, fresh off the charger, 32s would be about 135V. To get to 14kW you'd only need about 110A. Since heat losses go up as a square function of the current, this motor will run a ton cooler at 100-110A than it will at 300A+.
A kV of around 50 sounds perfect with a 32s pack, as it would get the motor rpm up between 5500-6000 rpm, which I'm guessing would be pretty close to its sweet spot, efficiency-wise, and with a 5:1 single stage reduction, that would certainly get you freeway speeds, for top-end, with a 26" wheel. A smaller motorcycle might be a better candidate.
-- Gary
liteCycles said:At this point it looks like 5 or 6 turns might be the practical limit when using a XieChang 116 controller (which apparently can only hold sync up to 6600rpm).
liveforphysics said:liteCycles said:At this point it looks like 5 or 6 turns might be the practical limit when using a XieChang 116 controller (which apparently can only hold sync up to 6600rpm).
Why do people keep spreading this wrong info around?
liteCycles said:liveforphysics said:liteCycles said:At this point it looks like 5 or 6 turns might be the practical limit when using a XieChang 116 controller (which apparently can only hold sync up to 6600rpm).
Why do people keep spreading this wrong info around?
That's why I busted out the weasle word apparently. Kindly point me to the right thread zen master.
liveforphysics said:I run motors with 14magnets at 10,000rpm. Thud made a you-tube video with a laser tach on the shaft showing 8,800rpm on a 14magnet motor, which was the voltage*KV limit of that setup, not limited by controller speed.
8 magnets in a Astro right? So you're looking at a minimum of ~15,000rpm confirmed all ready.
liveforphysics said:That RPM limit does seem to apply for the Infinions running the simulated sensorless modules. For hall sensor setups, it's not an issue.
Actually, I have been running my 3220s at 15,000+ RPM for a month now. Bob tested them up to 29,000 RPM.CNCAddict said:Hmm, I wouldn't try 15,000rpm unless bob says his rotor can handle that. I had mine blow up a little north of 10,000rpm from what I can recall.
recumpence said:Actually, I have been running my 3220s at 15,000+ RPM for a month now. Bob tested them up to 29,000 RPM.CNCAddict said:Hmm, I wouldn't try 15,000rpm unless bob says his rotor can handle that. I had mine blow up a little north of 10,000rpm from what I can recall.
I think he is using different adhesive now.
Matt
....? :?etard said:OK gentlemen, we have motors: CHECK, Batteries: CHECK, Controller: :?
etard said:OK gentlemen, we have motors: CHECK, Batteries: CHECK, Controller: :?
It would be fun to try a water-cooled can using a helically milled slot and a sleeve.............dequinox said:Have you considered doing a giant acme-style screw on the outer casing to allow for water cooling?
We can run a thread program for the fins. Of course, we can also just turn the center portion of the can down with no fins, then run a sleeve around that. RC boats use a sleeve just like that.Miles said:It would be fun to try a water-cooled can using a helically milled slot and a sleeve.............