MV-QSX8000 (DPX) update

MV-QSX8000 (DPX) is a modification of the MV-DPX from Wuxi Sachi Motors

a modification of the MV-DPX from Wuxi Sachi Motors c 2019

Wheelbase | 1410mm

Motor Controller | ASI BAC8000

Motor | QS 4000 (273v3)

Power System | 72 volt 39Ah @ 5300watt/hour output x2 for 10.6 Kw, (1.25c discharge .5 charge)

Fork Brace | Paolo Tarozzi

J1772 Onboard Charger | SB2500 

50 Mile range at 45mph 
Top speed 72mph

What type of work are you doing? Thermography studies on hub motors, batteries and controllers

Did you really think it was going to be faster than that? No, it's 4000w rated motor with a voltage rating of 100 volts.

Why did you change the motor from the YMOTO to the QS273-4000w? The design plan always included the QS motor as a future upgrade. The QS can handle higher temperatures and higher voltage than the YMOTO hub (3000w). And yes the YMOTO had great characteristics but eventually running it at high power caused a failure due to excessive heat.

Why the high end controller? Because the motor runs really smoothly, starts are great, very good throttle response, it means better efficiency overall. The BAC8000 provides better over all performance at lower temperatures. Also it is very quiet. 

Is there future plans to change this controller? Not yet although I'm testing a number of VOTOL controllers. The software is not on a par with ASI however.

Why J1772? 200,000 public charging points across the US. Allows for charging near my ride routes, that means no real range restriction, just time constraints.

What charger is used to enable the J1772 standard? SB 2500

Wheelbase (axel to axel)? ~1410mm

Front Fork Spacing? 220mm

Finally what is the Paolo Tarozzi fork brace for? That's old school for a better front end, the brace helps to eliminate flexion and stiction.

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