AS5047D 자석 위치 센싱 모듈 -SPI
(MAGNETIC ROTARY 6 CLICK)
개요
- 본 제품은 AS5047D 자석 위치 센싱 모듈 -SPI 입니다.
- 높은 분해능의 듀얼 로터리 위치 센서 AS5247U칩을 기반으로 디자인된 제품입니다.
- 360도 범위의 절대각을 측정할 수 있습니다.
- incremental 및 commutation signal(A/B/I and U/V/W signal, maximum resolution of 16384 steps / 4096 pulses per revolution)을 위한 헤더가 지원됩니다.
특징
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HOW DOES IT WORK?
Magnetic Rotary 6 Click is based on the AS5247U, a high-resolution dual rotary position sensor for fast absolute angle measurement over a full 360-degree range from ams AG. The core of the AS5247U represents a CMOS technology Hall-effect magnetic sensor that converts the magnetic field component perpendicular to the surface of the chip into a digital value. It supports high-speed applications up to 28krpm and allows a host MCU to read 14-bit absolute angle position data and to program non-volatile settings without a dedicated programmer. The AS5247U is also equipped with a Dynamic Angle Error Compensation block that corrects the calculated angle regarding latency by using a linear prediction calculation algorithm.
The AS5247U communicates with MCU using a standard SPI interface. The signals from its internal Hall sensors are amplified and filtered before their conversion by the ADC and then processed by the CORDIC block to compute the angle and magnitude of the magnetic field vector. The intensity of the magnetic field is used by the automatic gain control (AGC) to adjust the amplification level to compensate for temperature and magnetic field variations. This Click board™ also comes with onboard headers reserved for incremental and commutation signals of their respective A/B/I and U/V/W signals alongside embedded self-diagnostics. Incremental movements are indicated on a set of ABI signals with a maximum resolution of 16384 steps / 4096 pulses per revolution. The resolution of the ABI signal is programmable for 10 to 14 bits.
Brushless DC (BLDC) motors are also controllable through a standard UVW commutation interface with a programmable number of pole pairs from 1 to 7. At constant rotation speed, the latency time is internally compensated by the AS5247U, reducing the dynamic angle error at the SPI, ABI, and UVW outputs. The AS5047D also allows selection between a UVW output interface and a PWM-encoded interface on the W pin, which can be seen as an absolute angle position. A unique addition to this board is a position for a rotary magnet holder designed to be used alongside a magnetic rotary position sensor allowing fast prototyping and quick measurements during development.
This Click board™ can operate with either 3.3V or 5V logic voltage levels selected via the VCC SEL jumper. All jumpers must be on the same side, or the Click board™ may become unresponsive. This way, both 3.3V and 5V capable MCUs can use the communication lines properly. However, the Click board™ comes equipped with a library containing easy-to-use functions and an example code that can be used, as a reference, for further development.
SPECIFICATIONS
Type Magnetic Applications Can be used to support BLDC motor commutation for the most challenging automotive and safety-critical applications On-board modules AS5247U - rotary position sensor for fast absolute angle measurement over a full 360-degree range from ams AG Key Features Good resolution for motor and position control, independent output interfaces, self-diagnostics, immune to external stray field, low power consumption, highest reliability and durability, rotary magnet holder, and more Interface SPI Compatibility mikroBUS Click board size M (42.9 x 25.4 mm) Input Voltage 3.3V or 5V