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An absolute magnetic angle encoder output voltage control system and method

A technology of output voltage control and magnetic angle, applied in control systems, vector control systems, motor control, etc., to achieve the effects of small scale, low power consumption, and flexible configuration

Active Publication Date: 2019-01-15
CROSSCHIP MICROSYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, under the current development trend of increasing demand for industrial control technology and more and more complex functions, the simple voltage control based on the proportional control relationship can no longer meet the needs of users, and needs to be improved on the basis of the original technology. , a more complex and flexible control method

Method used

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  • An absolute magnetic angle encoder output voltage control system and method
  • An absolute magnetic angle encoder output voltage control system and method
  • An absolute magnetic angle encoder output voltage control system and method

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Embodiment

[0034] Such as figure 2 As shown, this embodiment provides an output voltage control system of an absolute magnetic angle encoder, and the control system includes: a phase detector, a digital filter, and an angle processing circuit.

[0035] The magnetic field strength in the horizontal and vertical directions is sent to the phase detector after analog-to-digital conversion. The phase detector internally obtains the current rotor rotation angle value through the CORDIC algorithm. This algorithm supports integer and decimal data input with arbitrary precision, and press Configure to work on symbol clock or system clock.

[0036] The angle estimated by the phase detector is sent to the digital filter for smooth filtering to filter out the interference of sudden noise. The processing formula of smoothing filter is:

[0037] y(n)=αx(n)+(1-α)y(n-1)

[0038] Among them, α is a constant between 0 and 1 configured in the register, x(n) is the input value at the current time, y(n) ...

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PUM

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Abstract

The invention discloses an absolute magnetic angle encoder output voltage control system and method, On the basis of conventional angle detection and phase mapping, the invention adds the functions ofangle limiting and electric compression and amplification, which can map to the voltage output of full volt according to the angle range configured by the register, at the same time, the voltage of full volt can be limited, and finally the required output result can be obtained. The invention has the characteristics of small scale, low power consumption, simple control, flexible configuration ofangle limiting range and voltage limiting range, etc. At the same time, the phase detector of the invention can realize the operation processing of arbitrary input precision, the operation result is high in precision, simple in realization and small in area power consumption. Flexible angular and voltage limiting configurations allow multiple ranges of output voltages to be constructed.

Description

technical field [0001] The invention relates to the field of motor control circuits, in particular to an output voltage control system and method of an absolute magnetic angle encoder. Background technique [0002] In the aspects of speed measurement, counting, angular displacement and linear displacement in current industrial applications, the magnetic angle encoder adopts a magnetoelectric design, which generates and provides the absolute position of the rotor through magnetic induction devices and changes in the magnetic field. Instead of the traditional code disc, it has the advantages of shock resistance, corrosion resistance, pollution resistance, reliable performance, high precision and simpler structure, so it has been more and more widely used. [0003] Magnetic angle encoders are divided into two types: absolute and incremental. The angle of a common absolute angle encoder is proportional to the output voltage, such as figure 1 shown. [0004] However, under the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/16H02P21/18H02P23/14
CPCH02P6/16H02P23/14H02P2203/03H02P21/18
Inventor 贺杰彭卓陈忠志赵翔
Owner CROSSCHIP MICROSYST
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