Vector controlled motor and controller

rienesl

100 mW
Joined
Feb 13, 2020
Messages
41
Hi,
I have had now a couple of electric bikes in my hands, ranging from 250W to up to 6kW. Usually they get just converted to a swap system (which is not that exciting), but sometimes the cow should fly and the rides get dual battery systems or a $200 toy gets converted to an 800W system. However, now there is a nice 3 wheeler in front of me (looks 1:1 like a Bajaj!) and my Votol EM-150 does not fit in that thing. Well, space is enough, but the motor claims to be vector controlled (whatever this means), not HAL sensor controlled. In other words, the cable with the sensor has only 4 pins, not 5. Anyone any clue about that vector thing? I know that some diesel use crankshaft position sensors. Is that something similar?
The current blackbox is a Slider Power SDJ-3KW. I have already written to the manufacturer, but I assume this will take some time until I get any response from them...
 
FOC aka flux-vector control,
generates sinusoid waveforms, produces consistent torque control, protect MOSFETs, yields better motor efficiency, especially at high speeds.

true FOC definition
https://www.motioncontroltips.com/faq-whats-the-difference-between-field-oriented-control-and-sinusoidal-commutation

 
Thanks for the quick reply. In the meantime I found the right words to feed Google and it returned me that page:
https://www.renesas.com/cn/en/support/engineer-school/brushless-dc-motor-02-inverter-pmw

Knowing. that the hot word is not "vector controlled", but "Resolver", got me to:
https://en.wikipedia.org/wiki/Resolver_(electrical)

And this leads me to a bunch of problems with this ride :confused: Anyone any experience with controllers, capable to utilize resolvers? The usual SiAecosys members (Votol, Sabvoton & Yuyangking) or Kelly are out - or did I miss a product of them that can?
 
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