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diy
how to check, bldc motor hall sensor is working or not?
pratik r. sonawane
Aug 09, 2021
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hall effect sensor is one of the essential component used in bldc motor. because of them, the motors don’t require carbon brushes commutation.
so to ensure that the sensors are working in the motor or not, we can use the following method.
apparatus you need for a checking
- multimeter
- controllerÂ
- motor (bldc)
- battery
step 1: connect motor and battery with controller
if you don’t have a battery then you can use an external power supply instead.
step 2: set multimeter reading.
set multimeter reading on 20VDC
step 3: check the sensor output sequence.
check the sequence of the motor hall sensors. they must follow the above sequence so it shows they are working.
connect the black terminal of the multimeter with the negative wire (black) of the controller and the red terminal with the positive wire (red) of the hall sensor wire group.
it should range from ~4.5-5VDC.
ok, now one by one check other wire outputs.
they will be like this 5V(Green wire) 0V(yellow wire) 0V(blue wire) fig.G.
for 5V – 1, 0V – 0
the output voltage of sensors can change by gradually rotating the rotary part of the bldc motor.
check the sequence again
you will notice the output voltage of each wire is different than the previous.
repeat the same procedure to find the remaining sequences.
how to know the sensor is damage:
if the hall sensor wires output are 0 0 0 or 1 1 1 it means one of the sensor is damaged or need a replacement.
you can use this method with any type of bldc motor. hope you find your solution.
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