I have recieved ALOT of PMs and emails asking for my 3230 motor. However, I have been busy working on other things, one of which is a 4 inch diameter motor. Astro Flight has been working on this for me and another client for some time now and they are building parts for these motors as we speak. The can will be finned an have an OD of 4.5 inches. The rotor is 2.5 inches in diameter (up from 1.5 inch for the 3200 series motors) and they will be available in .5 inch stack height increments. So, they will come in 4205, 4210, 4215, 4220, 4225, and 4230. The 4230 is rated at a true continuous output of 25,000 watts! The torque of these motors is over twice that of the 3200 series motors (of same lamination stack length) and more efficient. The laminations are 1/3 as thick as the 3200 series motors. So, a 4210 will use 3 times more laminations than a 3210. That means they will be costly (no cost numbers as of yet), they they should be VERY efficient. I should have some tech number from Astro's testing sometime today.
This motor will use 1/2 inch diameter shaft and 1-1/8 inch OD aircraft bearings and should be able to handle over 10,000 RPM.
I am already developing a high output single stage reduction unit (a large copy of my V4 drive) for this motor as we speak. Expected prototype batch completion date is tentatively "Late February". I will keep you posted.
And yes, the intent is for these to be sensored. Astro is delivering motors to me without sensors and I will have sensors fitted after delivery.
I would assume a 4205 will be more than enough for a bicycle. But, the 4230 should be a good light motorcycle motor, or an insane racing motor. The 4230 should weigh in at a touch under 10 pounds with an output of 35hp continuous and far higher burst rating.
Lastly, considering the 3200 series motors are 92% efficient (over 94% in many circumstances), these higher efficiency motors should be mind boggling in their efficiency numbers as well as operating temperature.
I will keep you posted as this develops.
Oh, this is not vaporware. These motors are already in operation in a rough prototype guise with thicker laminations and a basic can and have been tested for years at this point. However, they are just now being taken from the rough test stage to a refined markettable point. These will be still considered custom motors, not a stock item. However, all debugging will be finished and all specs finalized so they can be put into limited, short run production on a per order basis.
1% of the world's population can think "Outside the box". The rest are firmly stuck within the box. Where are you?