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So you're saying you don't use surface mount magnets? Imbedded magnets (the QS uses a V shape), something with some saliency; less ripple/cogging force and the possibility to do some reluctance switching, etc? That would be totally different than the Alta. Rotor design and the corresponding...

Oh, can you please address the battery thermal issue I mentioned? How with a limited (not much) delta T between the cells and ambient temp (here in SoCal assume 100F) can you get all the heat out. From what I see, you're using the same passive thermal management system that Alta used with a...

Obviously, I simplified the FOC process so that more people could follow. But if you want to get into a more detailed conversation regarding FOC, SVM, MTPA, axis coupling, field weakening, voltage circles, windup, rotor angle lead/retard, PI controllers, forward and reverse park...

Well, just don’t tell me I’m wrong and what conclusions I’m missing, explain your understanding of FOC and how the Varg is different/superior.

Above base speed of the motor, the d axis is used to counter the back EMF generated from the permeant magnets as the motor starts acting like a generator. These back EMF forces severely limit the usable and extended RPM range of any PMAC motor. The only way (to my knowledge without something...

I not sure if I see a decimal point or not. However, 1800 amps x 365v = 657K watts, that's not possible. So I assume its 180 amps. 180 x 365v = 65K watts or about 87 theoretical HP. However, current isn't the only factor. 180 amps (for 80hp) assumes all the amps is going through the Q axis...

Did I say anything about the "real" powerband? All I stated was it's easy to "fake out" many dynos with huge HP numbers just by how it's tuned and how the throttle is applied. I've set one on my Altas to a maximum RPM acceleration rate way above any of the standard map settings and on my dyno...

What model? The R packs are much easier to repair compared to the A pack. I've done both and usually I don't charge anything other than for parts (the DC-DC downconverter can run anywhere from $150 to $550 depending on how you want to go) if that's the only issue.

Super big HP numbers are easy with electric as the huge torque at low rpms can overwhelm any dyno (at typical motor rpms consistent with 1st gear). My little KTM 65 conversions could spike out at 25-30 hp between 0 and 1500 rpm, but it's just that, a spike, which drops fast and typically needs...

Certainly! I believe any surface mounted component can be replaced. There are more components on the other side (particularly the DCDC converter). In fact, it's the DCDC converter that prevents the A packs from easily pulling the board from the cover as it's bonded to the heatsink which in...

Here's a pic of the top cover removed (also the orange safety cover) showing the location of the RH sensor and ref designator (U4). DO NOT coat the sensor after installation. It needs to be open to the air inside the pack.

The RH sensor is on the top cover PCB. It's a standard part made by Honeywell as I recall. I've got pictures of the A pack part, reference designator and location. I think the R model is located in approx the same place but might have a different reference designator. I have a spec sheet on...

Anyone who keeps a DYI electric bike in their attached garage is flirting with disaster (detached is better but still big dollars if it burns down). I once had 5 conversions, 2 Altas, an electric kart and tons of cells and half-built packs in my attached garage and literally couldn't sleep at...

The Alta pack uses a passive system with the thermal plate (and some imbedded heat pipes) sandwiched between two modules. The thermal "plate" is very thin (about .050) and given the same thickness to the pack housing (radiating surface) simply can't move enough heat when the going gets tough...

I have experience with DI coolant fluids (Dialectric) with fully emersed packs and you'll need to design the cell layout with that in mind. You need to use greater than normal cell spacing to get enough flow to make any difference. This will make the pack larger than most you see where the...

With all due respect for snydes (who I think is a very smart and talented guy), my opinion is that those cells are not too low and can be brought back. I can typically fix these kinds of deviations without any labor charge (free). If you want to know more contact me at 602 752 0083. Mark911

Do bears shit in the woods?

I'm tired of all the snide innuendo form a certain member on the site so I'm leaving. Anyone who feels they might need my assistance in the future please take my text number down fast before it's too late. Mark at 602 752 0083.

see ya

Is the battery pack guaranteed not to burn your house down?