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Method for demarcating motor rotor position sensor

A technology of rotor position and calibration method, which is applied to electromechanical devices, synchronous motors for single-phase current, instruments, etc., to achieve the effects of high precision, simple steps and strong pertinence

Active Publication Date: 2009-04-01
CHERY AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One embodiment of this patent is an apparatus and method for aligning and securing an RPT element in the form of a shutter assembly, but no correction is made for the systematic errors of the RPT element, such that errors may inevitably occur when using the RPT

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  • Method for demarcating motor rotor position sensor
  • Method for demarcating motor rotor position sensor
  • Method for demarcating motor rotor position sensor

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Embodiment Construction

[0027] The present invention is designed for using a motor rotor position sensor based on the vortex effect. The position sensor has a target disk, which is made of conductive material and has a sinusoidal shape on the outer edge. It is installed on the motor rotor and moves with the motor rotor. Rotation, due to the vortex effect, a vortex magnetic field will be generated around it, and the strength of the magnetic field is related to the width of the target disk. Using an inductive element to generate the magnetic field, an electrical signal related to the magnetic field is generated on the inductive element. The inductive element It is installed in the motor housing and has one or more induction units. A preferred embodiment of the present invention is to use four planar windings as the induction unit. The electrical signal with the position information of the target disk generated by the induction unit passes through an ASIC The (Application Specific Integrated Circuit spec...

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Abstract

The invention discloses a calibration method used for a motor rotor position sensor; when the method is used for measurement, reverse electromotive force zero point is taken as a benchmark point; DIO (digital IO) is arranged in a DSP to generate the pulse, thus capturing the difference of the compensated decoded rotor position and the absolute position of the ideal rotor, finally achieves the alignment of the decoded rotor position and the absolute position of the ideal rotor, thus achieving the exact positioning of the zero point of the rotor position. The calibration method has the active effects that the method utilizes the rotor which has determined rotation speed and position to calibrate the system error of RPT, and has strong pertinence, high precision and simple step.

Description

technical field [0001] The invention relates to a calibration method of a rotor position sensor element (RPT) in an electric machine. In particular, it relates to a method for correcting the systematic error of RPT based on the principle of eddy current effect. Background technique [0002] Permanent magnet synchronous motors are widely used in fields such as electric vehicles, numerical control machine tools, and textiles due to their advantages of high power density, high efficiency, and low rotor loss. To obtain good control performance, motor rotor position and speed signals are essential. In some motor applications, it is necessary, even critical, to know the position of the rotor relative to the stator and windings. For example, in a switched reluctance motor, the windings must be energized to the exact position of the rotor. In other electric machines, only the position of the rotor relative to the stator assembly needs to be known. There are several prior art RPT...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D18/00H02K29/06H02K19/14
Inventor 谢美娟
Owner CHERY AUTOMOBILE CO LTD
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