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    1. · Registered
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      Discussion Starter · #2 ·
      I want drive this car by an éléctric motor but now i'm hesitate between a transaxle and a hub motor

      For transaxle is difficult to find a gear ratio about i=6, i have find but work with chinese is a little difficult...

      see picture of drawing i use for research, if anyone want a drawing or 3d file, tell me ;)

      For hub motor(x2 in traction or propulsion), i don't undersand who the controller(x2) simulate the differential, if anyone can explain me what happen with 2 hub motor ?

      see product i want to buy : https://fr.aliexpress.com/store/pro...60.html?spm=a2g0w.12010612.0.0.f5477442zCbHQi

      Have great day

      Tom
       

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    2. · Registered
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      8,498 Posts
      I want drive this car by an éléctric motor but now i'm hesitate between a transaxle and a hub motor
      ...
      For hub motor(x2 in traction or propulsion), i don't undersand who the controller(x2) simulate the differential, if anyone can explain me what happen with 2 hub motor ?

      see product i want to buy : https://fr.aliexpress.com/store/pro...60.html?spm=a2g0w.12010612.0.0.f5477442zCbHQi
      I don't see anything in the description which explains how they handle the speed difference between two motors.

      With AC (and BLDC) motors, since the motors are turning at different speeds they each need their own controller/inverter, running at different speeds in turns, and coordinated. Curtis Instruments (a popular supplier of AC controllers) includes this feature; they call it "Dual-Drive". In this system, one controller acts as the master, with the accelerator input connected to it; the other controller is the slave, and is connected to the master by a CAN bus cable. There is a sensor attached to the steering which tells the master how tightly the vehicle is turning (and which way), so that the controller knows how the two wheel speeds should be related.

      No you don't need to do any of that
      The road will do it for you!
      With DC (not brushless "DC") motors, you could just connect them to one controller in parallel, but I'm not sure that you would like the result.
       

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