Skip to content
This repository has been archived by the owner. It is now read-only.

DC bus current sensing #2

Open
2 tasks
FedorBel opened this issue Mar 28, 2021 · 6 comments
Open
2 tasks

DC bus current sensing #2

FedorBel opened this issue Mar 28, 2021 · 6 comments
Assignees
@FedorBel
Labels
Feature

Comments

@FedorBel
Copy link
Owner

FedorBel commented Mar 28, 2021 •
edited
Loading

How to measure dc bus in a 3-phase half bridge inverter.

  • Measure using shunt + op-amp
  • Measure using Hall Effect-Based ACS712
@FedorBel
Copy link
Owner Author

Article from STMicroelectronics on low-side current sensing using shunt resistor and op-amp.

@FedorBel
Copy link
Owner Author

image

@FedorBel
Copy link
Owner Author

Or just use ACS712 5A current sensor.

@FedorBel FedorBel mentioned this issue Mar 29, 2021
Closed
@FedorBel
Copy link
Owner Author

Measuring with ACS712 5A is not very good.

image.png

In fact, i only need to measure 0-4 A, there's less then 1v dif when measuring (not stable supply voltage can end with bad results).
Better build shunt + op-amp sheme.

@FedorBel
Copy link
Owner Author

FedorBel commented Apr 18, 2021 •
edited
Loading

  1. Advice on Current Sensing for new board design.
  2. Current Sensing Tutorial.

@FedorBel
Copy link
Owner Author

FedorBel commented Apr 18, 2021 •
edited
Loading

Current-sense amps:

  1. INAx180
  2. INAx181 - bi-dir
  3. INA381 - amp+comp
  4. INA250 - shunt+amp

Sign up for free to subscribe to this conversation on GitHub. Already have an account? Sign in.
Assignees

@FedorBel FedorBel

Labels
Feature
Projects
None yet
Milestone
No milestone
Development

No branches or pull requests
1 participant
@FedorBel