Hall Sensor Question

Electric Motors and Controllers
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Squeek   1 µW

1 µW
Posts: 1
Joined: Oct 18 2018 11:51am

Hall Sensor Question

Post by Squeek » Oct 18 2018 12:01pm

Hi Everyone,

I have opened up this motor and I am trying to determine whether the hall sensor placement is 60deg or 120deg apart. Middle sensor is flipped. Can anyone help me determine this?

12 Slots
10 Poles

Thank you,
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larsb   10 kW

10 kW
Posts: 669
Joined: Dec 10 2014 5:12am
Location: Gothenburg, Sweden

Re: Hall Sensor Question

Post by larsb » Oct 23 2018 2:35pm

You might find the answer here:
http://mitrocketscience.blogspot.com/20 ... r.html?m=1

with 12 slots you have 30 mech degrees between each slot.
10 poles is 5 pole pairs so 30 degrees mech is 5*30=150 degrees electric

So hall sensors are 300 degrees electric apart.

As the distance between the sensors can be multiplied with integer values without changing anything then they fit a 5*60 (=300) degree hall setup.

flipping the middle/third sensor means its inverted (it's position is then offset by 180 degrees electrical). A flipped sensor also means hall signals changes from 60 degree to 120 degree setup:
https://www.parkermotion.com/dmxreadyv2 ... estion=175

You can confirm above by assembly of the motor, rotate the rotor and measure hall states. If you have positions of 111 or 000 (all sensors on or off at the same time some angle during the rotation) then it's 60 deg, otherwise it's 120 deg.

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