Unlock instant, AI-driven research and patent intelligence for your innovation.

Method and apparatus for estimating rotor angle of synchronous reluctance motor

A technology of synchronous reluctance and rotor angle, applied in motor generator control, AC motor control, electronic commutation motor control, etc., can solve the problems of increasing system cost and unreliability

Active Publication Date: 2012-08-22
ABB (SCHWEIZ) AG
View PDF1 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, position sensors add cost and unreliability to the system

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method and apparatus for estimating rotor angle of synchronous reluctance motor
  • Method and apparatus for estimating rotor angle of synchronous reluctance motor
  • Method and apparatus for estimating rotor angle of synchronous reluctance motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0011] In machine types such as permanent magnet motors and induction motors, the rotor flux component cannot be determined unambiguously from the integral of the stator voltage. There is no permanent magnet flux in SYRM, so stator flux and stator current are directly constrained to each other by an inductive relationship in the rotor coordinate system.

[0012] The inductance in the rotor coordinate system is represented by two components: the d-axis inductance component L d and the q-axis inductance component L q . The difference between these two parameters is the basis for the operation of the reluctance motor.

[0013] If the inductive components of a synchronous reluctance motor are known, they can be used in rotor orientation estimation. First determine the stator flux and stator current. A first estimate of rotor orientation may then be formed based on stator flux, stator current, and a known rotor inductance component. According to the stator flux with the indu...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A method of estimating a rotor angle of a synchronous reluctance motor, where the motor comprises a stator and a rotor. First, a stator flux and a stator current are determined. Two orthogonal stator flux components in a stator reference frame are calculated from the stator flux. Two orthogonal stator current components in the stator reference frame are calculated from the stator current. Two rotor orientation vectors are then calculated using a known rotor direct and quadrature axis inductance components, the stator flux components, and the stator current components. A rotor angle is estimated on the basis of the rotor orientation vectors.

Description

technical field [0001] The present invention relates to synchronous motors, and in particular, to estimating the rotor angle of a synchronous reluctance motor (SYRM). Background technique [0002] A synchronous motor is an AC (alternating current) motor comprising a rotor and a stator, characterized in that the rotor rotates in frequency synchronism with the stator. There are two main types of synchronous motors: non-excited and DC excited. Reluctance motors belong to the former group. [0003] When operating a synchronous motor, it is often necessary to know the angle and / or speed of the motor's rotor. Angle and velocity can be detected eg by using position sensors. However, position sensors add cost and unreliability to the system. Contents of the invention [0004] It is an object of the present invention to provide a method and an apparatus for implementing the method in order to alleviate the above-mentioned problems. The objects of the invention are achieved by ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/14H02P25/08
CPCH02P25/08H02P21/18
Inventor 马蒂·韦亚宁
Owner ABB (SCHWEIZ) AG