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VESC4 phase shunt

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Rico
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Joined: 2019-05-21 16:01
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VESC4 phase shunt
Hi, I'm using a VESC 4 and I want to measure the current inline with two phase shunts.
Is it necessary to add "HW_HAS_PHASE_SHUNTS" to the hw_410.h file and does this just affect the FOC mode or also the BLDC mode?
(or is this maybe just possible with a VESC 6 HW?)
 
And how does the current sensing actually work with two low side shunts when the current goes through high-side FET Q1 and low-side-FET Q4?
Can the VESC just measure when the high-Side FET is open during the active freewheeling since there's no shunt in the second halfbridge?
 
Thanks
vimi94
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Last seen: 4 years 4 months ago
Joined: 2019-04-26 16:24
Posts: 18

Hey I want to mesaure and log phase currents for all three phases. Do you know how can I do that?

skyline1970
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Joined: 2017-09-07 22:28
Posts: 232

Simply, you (vimi94) could use in series ACS758-200B with each phases. Outputs of the current sensors could be connected to any data acquisition device or mcu like arduino, rasberry pi to log the data to com port or write on sd card.

svs
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Last seen: 3 days 23 hours ago
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Joined: 2018-07-01 09:21
Posts: 8

Hi everybody.
I am new in vesc.
 i want use acs712-30A(current sensor) in my driver. i use 2.4k and 4.7k resistor to convert 2.5 volt to 1.65v  but i dont  know how much  is CURRENT_AMP_GAIN ?
How do i calculate  CURRENT_AMP_GAIN and CURRENT_SHUNT_RES?
Can everybody help me?