JP2000217384A5

JP2000217384A5 -

Info

Publication number: JP2000217384A5
Application number: JP1999010140A
Authority: JP
Filing date: 1999-01-19
Publication date: 2005-10-27
Anticipated expiration: 2019-01-19

Description

【００１３】
【課題を解決するための手段】
これらの課題を解決するために、本発明の位置センサレスモータの制御装置は、ロータと、複数相のコイルが巻かれたステータと、前記コイルに電圧を印加する電圧印加手段と、前記電圧印加手段により前記コイルに流れる電流値を検出し出力する電流値出力手段と、モータ定数を含むモータのモデル式と前記電流値出力手段から出力された前記電流値と前記電圧印加手段により印加された電圧値とに基づき前記ロータの推定位置を演算出力する推定位置出力手段と、直流量で与えられる電流指令値を出力する電流指令値出力手段と、前記ロータの前記推定位置を用いて前記コイルに流す電流が前記電流指令値となるように制御する電流制御手段とを具備する位置センサレスモータの制御装置において、前記推定位置出力手段は、前記電圧値、前記電流値、前記電流指令値、前記ロータの回転数、動作開始からの時間、の少なくとも１つに基づき前記モデル式で用いる前記モータ定数を変化させるものである。 0013
[Means for solving problems]
In order to solve these problems, the control device for the position sensorless motor of the present invention includes a rotor, a stator in which a plurality of phases of coils are wound, a voltage applying means for applying a current to the coils, and the voltage applying means. and a current value output means for outputting detecting a current flowing through the coil, the voltage value applied the current value model equation is output from the current value output unit of the motor and by said voltage application means including a motor constant Based on the above, an estimated position output means for calculating and outputting the estimated position of the rotor, a current command value output means for outputting a current command value given by a DC amount, and a current flowing through the coil using the estimated position of the rotor. In the control device of the position sensorless motor including the current control means for controlling the current command value , the estimated position output means includes the voltage value, the current value, the current command value, and the rotation of the rotor. The motor constant used in the model formula is changed based on at least one of the number and the time from the start of operation.

【００７９】
【発明の効果】
以上のように本発明によれば、電圧印加手段４により印加された電圧値と電流値出力手段５から出力された電流値を推定位置出力手段９に入力してモータのモデル式から位置を演算推定する。ここで、推定位置出力手段９はモデル式で用いるモータ定数を動作条件に応じて変化させる。即ち、電流指令値あるいは電流値が増加するとモータのモデル式のインダクタンスを減少させる、あるいは、誘起電圧定数を回転数が低い時に大きくし、回転数が大きい時に小さくする推定位置手段を設ける、あるいは、抵抗値を動作開始時には低く、動作開始一定期間後に大きくする事により、インダクタンスの電流量による変化やデッドタイムの影響を補償できる事となり位置推定精度が良く常に高効率な位置センサレスモータの制御装置を提供できる。
[0079]
【Effect of the invention】
As described above, according to the present invention, the voltage value applied by the voltage applying means 4 and the current value output from the current value output means 5 are input to the estimated position output means 9, and the position is calculated from the model formula of the motor. presume. Here, the estimated position output means 9 changes the motor constant used in the model formula according to the operating conditions. That is, when the current command value or the current value increases, the inductance of the model formula of the motor is reduced , or the induced voltage constant is increased when the rotation speed is low and decreased when the rotation speed is high, or an estimated position means is provided. By lowering the resistance value at the start of operation and increasing it after a certain period of time from the start of operation, it is possible to compensate for changes due to the amount of inductance current and the effects of dead time. Can be provided.

Claims

A rotor, a stator around which coils of a plurality of phases are wound, voltage applying means for applying a voltage to the coil, current value output means for detecting and outputting a current value flowing through the coil by the voltage applying means, and a motor constant a model expression with the current estimated position output means for calculating outputs the estimated position of the rotor based on the voltage value applied by said current value and said voltage applying means which is outputted from the output means of the motor comprising a direct current amount position sensorless and a current instruction value output means for outputting a current command value given, the current flowing in the coil with the estimated position of the rotor and a current control means for controlling so that the current command value in In the motor control device,
The estimated position output means changes the motor constant used in the model formula based on at least one of the voltage value, the current value, the current command value, the rotation speed of the rotor, and the time from the start of operation. A control device for a position sensorless motor.

2. The position sensorless motor control apparatus according to claim 1, wherein the estimated position output means reduces the inductance of the motor model equation when the current command value or the current value increases.

2. The position sensorless motor control device according to claim 1, wherein the estimated position output means increases the induced voltage constant of the motor model equation when the rotational speed is low and decreases when the rotational speed is large.

2. The position sensorless motor control apparatus according to claim 1, wherein the estimated position output means lowers the resistance value of the motor model equation at the start of operation and increases it after a certain period of operation start.