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How to judge the phase failure of brushless controller for electric scooter

How to judge the phase failure of brushless controller for electric scooter

Compared with the brush controller, the brushless controller has its own special fault phenomenon, and now makes a simple analysis on the lack of phase fault:

The brushless controller have two kinds of phase failures.one is the main phase of the lack of phase detection,testing method is to check the MOS tube broken or not, in normal, the brushless controller MOS tube generally is break the upper and lower two pairs of MOS tube at the same time to ensure that the replacement.

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The sense failue of brushless controller shows that the controller can not recognize the motor sense signal. The testing method is to Unplug the wire between controller and brushless motor ,supply power with the +20V DC table (DC) file, the black pen is on the blace wire of  controller , the red pen is on the other sense wire ,there should be a voltage of more than +5V. Otherwise, the controller sense have problem.

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