Recent content by jaybee9

My application is a multi-axle electric vehicle, to be specific. I have a good handle on the top speed. My question was more geared towards understanding the entire torque vs. speed envelope, especially the low speed torque. Great point! That had not occurred to me that it was not raw motor...

See attached files. The blue curve is straight from the file 10_205_55H_V3_72V_1321RPM.pdf. I only plotted it differently than how it is done in the file to be more useful for my purposes. I am not planning on using the +/- versions but it was helpful insofar as it gave me more data to work with.

I have been trying to decide what version of the QS 4000W 205 V3 motor would be best for my EV application. I have gotten a couple data sets from the QS sales guy: 3T- (Fast) @ 72 V and 3T (Balance) @ 72 V. He didn't have 4T (Torque) data. My nominal battery voltage is 88.8 V and I am planning...

Correct. I am not building an ebike. Still looking for a US distributor. No luck with drchopper8.

I was planning to put the motor inside the rim as shown below. Obviously, the fit would be tighter radially as they are probably showing a 12 inch rim. Will try to update at later date but just trying to make sure that the approach is sound before buying the motors, rims, and wheels.

Hmm... They have the same motor mated to a 10 inch scooter rim: https://www.qsmotor.com/product/10inch-4000w-scooter-motor/ Why is 10 inch okay for scooter but recommend 12 inch for car?

Thanks for the links! Great stuff.

Yes, it is a bit heavy but for my purposes it is okay. But you do raise a good point and one additional benefit of staying smaller was to minimize additional weight.

I am looking to put QS 205 V3 55H motors in 10 inch ATV rims. QS recommends 12 in rims (probably for better airflow): https://www.qsmotor.com/product/4000w-car-motor However, the QS 205 fits in a 10 in rim with about 16 mm of clearance. I want to use a smaller rim and tire to maintain higher...

Yeah it is a little out of their wheelhouse but I'll give them a call.

55H. See: https://www.qsmotor.com/product/4000w-car-motor/ Ok thanks I will check them out.

I am interested in purchasing some new QS 205 V3 55H motors. Can anyone explain why there are a multitude of QS motor sites? http://www.cnqsmotor.com/en http://www.qs-motor.com https://www.qsmotor.com (Near as I can tell, qsmotor.com is the only one who carries the 55H.) Would prefer to...