Editing Phasing a.k.a. phase search
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− | + | Unlike DC motors, AC & BLDC & linear motors (synchronous motors) require electrical commutation. This means that sinusoidal waveforms fed to windings must all times run in synchronism with motor magnets (rotor). As rotor is the moving part, drive must track it's motion in order to commutate current to correct winding phases. | |
− | Unlike DC motors, AC & BLDC & linear motors (synchronous motors) require electrical commutation. This means that sinusoidal waveforms fed to windings | + | |
Suggested reading [http://pcbheaven.com/wikipages/How_Brushless_Motors_Work/ How Brushless Motors Work]. | Suggested reading [http://pcbheaven.com/wikipages/How_Brushless_Motors_Work/ How Brushless Motors Work]. | ||
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* Sensor based phasing go wrong if commutation sensor is improperly wired, or not outputting signals that are expected by drive. This can yield randomness in initialization (S may seem random after each power on). | * Sensor based phasing go wrong if commutation sensor is improperly wired, or not outputting signals that are expected by drive. This can yield randomness in initialization (S may seem random after each power on). | ||
* To verify if sensored method works, try starting up drive after motor shaft has been set at different angle on each test, and then try drive the motor. I.e. first power on it at angle 0°, then 5°, then 10°, then 15° and perhaps few random angles too. If motor stays stable and operates properly after each power on at any angle, then phasing is working correctly. | * To verify if sensored method works, try starting up drive after motor shaft has been set at different angle on each test, and then try drive the motor. I.e. first power on it at angle 0°, then 5°, then 10°, then 15° and perhaps few random angles too. If motor stays stable and operates properly after each power on at any angle, then phasing is working correctly. | ||
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