Digital implementation architecture of absolute magnetic angle encoder

Abstract

The invention discloses a digital implementation architecture of an absolute magnetic angle encoder. The digital implementation architecture involves the digital terminal processing steps: convertinganalog terminal data into digital signals via A / D (analog / digital) conversion, correcting with a first digital filter, processing with a phase detector, processing with a module detector, smoothing and filtering with a second digital filter, processing with an angle processing module, and allowing PWM (pulse width modulation) modulated output or D / A output. The digital implementation architecturehas inherent advantages of an absolute encoder; the angle output range can be optionally adjusted; phase mapping and zooming of the optional angle range from 0 degrees to 360 degrees are achieved. Thedigital implementation architecture is clear and simple, has high angle detection precision, stable power and high anti-interference capacity, and allows the angle limit range and output voltage limit range to be optionally adjusted according to configurations so as to meet the different actual application needs.

Description

technical field [0001] The invention relates to the technical field of motor control circuits, in particular to a digital realization framework of an absolute magnetic angle encoder. Background technique [0002] In the measurement process of speed measurement, counting, angular displacement and linear displacement in current industrial applications, the use of photoelectric angle encoders and magnetic angle encoders occupies a dominant position. [0003] The photoelectric angle encoder is a type of sensor with a photoelectric code disc with a central shaft, on which there are circular and dark engraved lines, and a photoelectric emitting and receiving device to read and obtain signals. It is mainly used to measure displacement or angle. , but is bulky, has limited precision and is not continuous. [0004] The magnetic angle encoder adopts a magnetoelectric design. Through the magnetic induction device, the change of the magnetic field is used to generate and provide the ab...

AI Technical Summary

Problems solved by technology

[0003] The photoelectric angle encoder is a type of sensor with a photoelectric code disc with a central shaft, which has circular through and dark engraved lines, and a photoelectric emitting and receiving device to read and obtain signals. It is mainly used to measure displacement or angle. , but with large size, limited precision and discontinuous

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