Method and device for controlling startup of motor

A technology of electric motors and control modes, applied in the direction of starting devices, starters of single reluctance motors, motor generators/starters, etc.

Inactive Publication Date: 2006-06-14
LG ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This further raises the issue that the motor needs to be controlled by a new starting algorithm due to the said obtained value being applied to the starting algorithm

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  • Method and device for controlling startup of motor
  • Method and device for controlling startup of motor
  • Method and device for controlling startup of motor

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Embodiment Construction

[0029] Exemplary embodiments according to the present invention will be described in detail with reference to the accompanying drawings. In the following description, a detailed description of well-known functions and structures incorporated in the present invention will be omitted when the detailed description would otherwise obscure the subject matter of the present invention.

[0030] FIG. 2 is a structural block diagram showing a sensorless control system equipped with an apparatus for controlling starting of a motor according to an embodiment of the present invention. image 3 is a schematic diagram showing the output characteristics of the voltage injector shown in FIG. 2 . Figure 4 is a schematic diagram showing the detailed structure of the position / velocity estimator shown in FIG. 2 .

[0031] Referring to Fig. 2, the sensorless control system equipped with the device for controlling the start-up of the motor according to the embodiment of the present invention main...

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Abstract

The invention discloses a method and a device for controlling the starting of a synchronous reluctance motor. The device comprises: a voltage injector, which generates an injected voltage to estimate the initial position of the rotor; a motor drive voltage generator, which transforms the stationary frame voltage including the injected voltage into a three-phase motor drive voltage and converts the three-phase motor a driving voltage is applied to the motor; a current extractor which extracts response current components iα-inj, iβ-inj corresponding to the injection voltage from the two-phase stationary coordinate system current transformed from the three-phase current detected according to the rotational speed of the motor ; and a position / speed estimator which extracts the response current component related to the rotor position from the response current components iα-inj, iβ-inj corresponding to the injected voltage to calculate the rotor position error (e), and based on the calculated The rotor position error (e) estimates the speed and position ω, θ of the rotor.

Description

[0001] This application claims priority from Korean Patent Application No. 2004-101840 filed with the Korean Intellectual Property Office on December 6, 2004, the entire contents of which are hereby incorporated by reference. technical field [0002] The present invention relates to a method and a device for controlling a motor, and more particularly, to a method and a device for controlling the starting of a synchronous reluctance motor. Background technique [0003] A synchronous reluctance motor is a motor of such a structure that a driving source of a rotor is synchronized with a driving source of a stator, and the rotor rotates so that resistance generated in the rotor when current enters the stator can be minimized. To drive such a synchronous reluctance motor, the position of the rotor should be known. By using a rotor position detector, such as an encoder, the position of the rotor can be directly detected. However, the rotor position detector cannot be used in a co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/20H02P6/18
CPCH02P1/163H02P6/183H02P25/08
Inventor 李吉洙郑达浩李炅勋
Owner LG ELECTRONICS INC
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