Trigger signal input is programmable to be edge- or level-sensitive with polarity control. Since the BLDC sensorless motor control applications use the PWM output as an ADC external trigger signal (see Section 3.2.1, “Back-EMF voltage sensing ”), the external trigger is configured with rising edge.
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I have some Brushless DC Motors with drivers and I need some help finding the pinout of the drivers.
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Driver Top:
Driver Back:
Motor:
(source: herringthorpe.com)
I have so far got the motors running in 1 direction by shorting pins 1,2 and 3,4 it also runs with shorting pins 1,4 or providing 5V to pin 4.
I have been testing by providing 12V to pins 5 and 7. I assume that I should be able to control the movement precisely / reverse / break as the motor is a BLDC servo.
Any help is very much appreciated, I can provide any readings using my multimeter if that will help. I am a bit of a novice when it comes to electronics!
I don't see anywhere near enough devices on that board for it to be anything like a servo controller.
I would guess you have a simple electronic commutator, with no provisions for any other control (except perhaps PWM speed control). I wouldn't be surprised if it couldn't even reverse.
The board looks to be just two layer, and all the parts are nice and big, so it shouldn't be too much trouble to map out the traces. That should get you a rough schematic.
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