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AS5047D 데이터시트(PDF) 21 Page - ams AG |
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AS5047D 데이터시트(HTML) 21 Page - ams AG |
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21 / 37 page ![]() ams Datasheet: 2014-Jun-27 [v1-02] AS5047D – 21 Detaile d Desc rip t ion UVW Commutation Interface The AS5047D can emulate the UVW signals generated by the three discrete Hall switches commonly used in BLDC motors. The UVWPP field in the SETTINGS register selects the number of pole pairs of the motor (from 1 to 7 pole pairs). The UVW signals are generated with 14-bit resolution. During the start-up time, after power on of the chip, the UVW signals are low. Figure 33: UVW Signals The Figure 32 shows the UVW signal flow if the magnet rotates in clockwise direction, placing the magnet on the top of the AS5047D and looking at the magnet from the top (DIR=1). With the bit DIR, it is possible to invert the rotation direction. U V W Electrical Angle 0° 60° 180° 240° 120° 300° 360° |
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