FBL2360, 2ch is not working.

5 years 1 month ago - 5 years 1 month ago #29531319 by robotian
I have some problem on FBL2360 driver

I installed two BLDC motor. Two BLDC motor are same model.

And configuration is same too. (factory reset)

1ch is run well, but 2ch is not working.

I check 2ch waveform of uvw, that shows wrong wave form
(Condition: stop command, disconnected u.v.w., connected only hall sensor, check the uvw waveform with rotate wheel)

Refer to attached image.

How mean is this?
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5 years 1 month ago #29531325 by roboteq
Replied by roboteq on topic FBL2360, 2ch is not working.
First read the values of the hall sensors with the console command

?HS

you will see 2 numbers. One for ch1 and the second for ch2

Each number has the 3 bit of hall sensors. Values 0 and 7 are not valid. So you should only see 1 2 3 4 5 6 (not in this order) as you slowly rotate the motor.

Then disconnect the motors from the output. Apply 100-200 command on the slider (10-20% PWM) As the hall sensor combinations changes, you should see each of the U V or W wires take one of the following 3 states:

1- Grounded. It will show as solid 0V on the scope
2- PWM pulsing. The signal will be a very crisp, very square signal going from 0V to the battery voltage
3- Floating. Scope will be near zero but not firm 0V

Send photos of scope with suspicious signal levels

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5 years 1 month ago #29531326 by robotian
I can see the 2 number on console as your direction.

the 1ch show "1~6", but 2ch show '7' sometimes.

So I check the waveform of hall sensor using scope.

The hall sensor waveform is correct. It is same with 1ch.

After than How can i do?

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5 years 1 month ago #29531330 by roboteq
Replied by roboteq on topic FBL2360, 2ch is not working.
7 is 111. This is an invalid combination. This means that probably one of the input is not connected to the hall sensor and is read always as 1

move the motor very slowly and do ?HS frequently. Write down the values and convert to binary. You will probably see one bit always at 1. This will be the sensor wire to check

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