{"id":10888,"date":"2020-09-09T12:54:30","date_gmt":"2020-09-09T12:54:30","guid":{"rendered":"https:\/\/dronenodes.com\/?p=10888"},"modified":"2023-10-15T12:28:23","modified_gmt":"2023-10-15T12:28:23","slug":"how-to-rewind-brushless-motor","status":"publish","type":"post","link":"https:\/\/dronenodes.com\/how-to-rewind-brushless-motor\/","title":{"rendered":"How to Rewind Brushless Motor | Repairing Fixing Drone Motors"},"content":{"rendered":"\n

In this short tutorial, we\u2019ll explain how to rewind brushless motor damaged by windings burnout due to the overload, short circuit, or sudden motor blocking at full speed. It\u2019s not complicated when you get the full idea, and it can save you plenty of time (no waiting for new motors to be delivered) and money (yes, you can do it on your own).<\/p>\n\n\n\n

MOST COMMON MOTOR FAILURE<\/h2>\n\n\n\n

There are a few ways to damage brushless motor windings:<\/p>\n\n\n\n

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  1.  Overload<\/li>\n\n\n\n
  2. Overheating as a result of insufficient cooling<\/li>\n\n\n\n
  3. Vibration and mechanical damage of internal winding juction and power supply wires<\/li>\n<\/ol>\n\n\n\n

    Motor overload is the most common cause of stator core burnout. If you load your craft more than the mass propellers can lift, the motor will heat up very quickly which will cause internal isolation (polish, enamel) melting.<\/p>\n\n\n

    \n
    \"damaged<\/a><\/figure><\/div>\n\n\n

    As soon as the enamel is melted, there\u2019s a short circuit inside the winding and that causes wire melting and motor destruction. Motor overheating can happen a lot if the rotor is poorly designed and the airflow which cools windings is insufficient for proper stator internal core cooling.<\/p>\n\n\n\n

    Mechanical damage and strong vibrations can lead to a break in the connection of a wire which powers the motor and stator internal core wires.<\/p>\n\n\n\n

    PARTS OF A BRUSHLESS MOTORS<\/h2>\n\n\n
    \n
    \"brushless<\/a><\/figure><\/div>\n\n\n

    When the motor is armed, the rotor is locked to the stator with a C-clip key which secures the shaft – it stops the rotor from the flying out of the motor bearing, along with the propeller and everything connected to the shaft.<\/p>\n\n\n\n

    The stator is made of tiny metal sheets and it\u2019s protected by industrial varnish which is resistant to high temperatures, and usually olive-green. It\u2019s made of sheets rather than one solid piece of metal because it creates a more efficient magnetic field. Just a few windings around every stator tooth creates a magnetic field controlled by ESC.<\/p>\n\n\n\n

    In three-phase motors, the number of stator poles must be divisible by 3.<\/p>\n\n\n