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3 shunt low side vs 3 shunt 'in phase' current sensing

Submitted by ripperpc on Mon, 2020-05-04 08:47

Hi,

I understand that when moving from 4.12 to 6, the current sensing method was changed from 2 shunt 'bottom side' to 3 shunt 'in phase' .

Current sensors for in phase applications - specially for high voltage application are pretty expensive, and the only credible option for me seems to be the ACS758 or variants that other members seem to be using.

 

Questions:

- Is there any benefit of 3 shunt 'in phase' sensing over 3 shunt 'bottom side' current sensing for FOC ?

How the saliency is affecting the High frequency signal injection?

SOURAV UK's picture
Submitted by SOURAV UK on Sun, 2020-05-03 11:35

Hi

                                                     I' am having doubt's regarding which rotor position estimation method should be used for a 1 Kw surface mount PMSM.  Is it possible to use signal injection method for finding the rotor position?

Thanks in advance,



Best Regards, Sourav U K

Electric PPG - Light UL plane - ONE motor project

ITGlider's picture
Submitted by ITGlider on Sat, 2020-05-02 14:55

Hi, Gianni from Italy, I'm a glider pilot and I help friend in my flying club to transform into electric PPG - HANG GLIDER - GLIDER,  unsatisfied for the poor results using commercial BLDC motor finally using my experience I design and build my own brushless motor.The motor was designed also for liquid cooling for heavy use. My idea, and the results are proving me right, is to have only one model of motor that can be used on different projects and with uneven performance and power demands.



VESC/FOC developer needed

Submitted by CAYAGO_MS on Thu, 2020-04-30 14:23

Hello and greetings to all forum members, especially Benjamin Vedder for his great work!

We are a company in Germany that develops and produces the word fastest diving scooter SEABOB (www.seabob.com).

Actually we are planning a motor controller based on VESC technology.

For this we are looking for an experienced software developer with advanced knowledge of

  • VESC

  • FOC

  • ChibiOS

  • STM32F4xx

  • CAN

Newbie Help - ADC input

Submitted by nickyg on Tue, 2020-04-28 11:05

Hi All

I am attempting to build a friction drive E-bike, but am new to Brushless motor control and am at a loss as to why my set-up isn't working.

I'm using a Flipsky FSESC6.6 with 6354 190KV Motor, and the generic Hall throttle from Bangood.

I've had some intermittent success getting the motor set up through the FOC wizard. However I am unsure if FOC is relevant to my application?

Interested in software, computer science student

Submitted by coddy on Mon, 2020-04-27 22:52

Hello and thank you for setting up this place, i am a keen mountain boarder and have got into the e skate scene not so long ago so have a few VESC components. I am also currently a student in a university doing a computer science degree, i understand your software is open source and would love to contribute something to the VESC to gain some experience (plus i enjoy that kind of thing!). How would i go about this though? I've never really used Github so only really understand downloading bits off there, would really like to contribute if i could.

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