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

Device for estimating position of position-free sensor for PMSM (permanent magnet synchronous motor)

A permanent magnet synchronous motor and sensor technology, applied in the direction of electronic commutator, etc., can solve the problems of difficult hardware circuit implementation and complex position estimation algorithm implementation

Active Publication Date: 2013-04-24
INST OF MICROELECTRONICS CHINESE ACAD OF SCI
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These position estimation algorithms are very complicated to implement, and the hardware circuit implementation is very difficult.

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
  • Device for estimating position of position-free sensor for PMSM (permanent magnet synchronous motor)
  • Device for estimating position of position-free sensor for PMSM (permanent magnet synchronous motor)
  • Device for estimating position of position-free sensor for PMSM (permanent magnet synchronous motor)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0010] A position sensorless position estimation device applied to permanent magnet synchronous motors provided by the present invention is based on the characteristics of the position estimation algorithm of the stator flux vector equation, which can complete the calculation of the electromagnetic torque T through the sequence. e , Calculation of speed increment Δω, speed estimation and position estimation operations, thus completing the entire algorithm. Among them, the position estimation algorithm based on the stator flux vector equation mainly uses the following two formulas: speed increment Δω = 1 J · ( p · T e - B · ω pre - p · T l ) ...

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

The invention discloses a device for estimating the position of a position-free sensor for a PMSM (permanent magnet synchronous motor), comprising an electromagnetic torque computation module, a control module, a velocity increment computation module, a velocity estimation module and a position estimation module. The invention provides an implementation method of a hardware circuit for estimatingthe position of the position-free sensor for the PMSM, which is implemented by controlling a skip TDM (time division multiplex) state machine of a state machine on the basis of ensuring control accuracy. Because the computation can be finished in a single period, occupation conditions of hardware resources realized by a position estimation algorithm based on a stator flux linkage vector equation are reduced greatly on the basis of ensuring the time accuracy required by the normal operation of a motor.

Description

technical field [0001] The invention relates to the field of permanent magnet synchronous motor control, in particular to a device for estimating the position of a permanent magnet synchronous motor without a position sensor. Background technique [0002] At present, the common control method of permanent magnet synchronous motor is the SVPWM (Space Vector Pulse Width Modulation) algorithm based on voltage vector. The core of the algorithm is the decoupling of the stator current and the rotor current, and the decoupling calculation needs to know the position of the rotor. The traditional method is to use a position sensor to obtain position information, but the mechanical position sensor not only has poor accuracy, but also increases the volume and cost of the system. As a result, sensorless control algorithms have received more and more attention. [0003] There are two main types of position estimation algorithms: the first type is the method based on the motor ideal vol...

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 Patents(China)
IPC IPC(8): H02P6/18
Inventor 任雁鹏毕卉梁利平
Owner INST OF MICROELECTRONICS CHINESE ACAD OF SCI