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Rotating electric machine control device

A technology for rotating electrical machines and control devices, applied in motor control, control systems, vector control systems, etc., can solve problems such as increased calculation load, achieve the effect of suppressing the increase of calculation load and improving the accuracy of estimation

Active Publication Date: 2019-11-08
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a problem that the calculation load increases in order to improve the estimation accuracy at the time of magnetic saturation

Method used

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  • Rotating electric machine control device
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  • Rotating electric machine control device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0036] figure 1 It is a diagram showing the configuration of a control device for a rotating electrical machine according to Embodiment 1 of the present invention. Hereinafter, a "control device for a rotating electrical machine" may be simply referred to as a "control device". figure 1 The shown control device 100 includes: a voltage applicator 3, u * , v v * , v w * AC power is supplied; the current detector 2 detects the AC current supplied from the voltage applicator 3 to the rotating electrical machine 1, and outputs the detected AC current as the rotating electrical machine current i u i v i w ; The position estimator 4 uses the rotating motor current i detected by the current detector 2 u i v i w To calculate the estimated position θ^ r ; and the controller 5, so that the output torque of the rotating electrical machine 1 becomes the torque command value T * Calculate the rotating electrical machine voltage command v for driving the rotating electrical mach...

Embodiment approach 2

[0064] In Embodiment 1, the drive control of the rotating electrical machine 1 is performed on the rotation coordinates. Control on the rotating coordinates is widely used, and it is possible to drive and control the rotating electric machine 1 with high response. However, the control on the rotating coordinates requires transformation of the rotating coordinates and its control calculation. In Embodiment 2, a configuration example when the drive control of the rotating electric machine 1 is performed on the three-phase coordinates will be described.

[0065] Figure 6 It is a diagram showing the configuration of a control device for a rotating electrical machine according to Embodiment 2 of the present invention. The control device 100 of the first embodiment differs from the control device 100A of the second embodiment in that the controller 5A is used in the control device 100A instead of the controller 5 .

[0066] The controller 5A includes a position estimation voltage...

Embodiment approach 3

[0072] In Embodiments 1 and 2, the pulse-shaped position estimation voltage command v uh * , v vh * , v wh * . In Embodiment 3, a polyphase AC voltage is used as the position estimation voltage command v uh * , v vh * , v wh * .

[0073] Figure 7 It is a diagram showing the configuration of a control device for a rotating electrical machine according to Embodiment 3 of the present invention. The difference between control device 100 of Embodiment 1 and control device 100B of Embodiment 3 is that controller 5B is used instead of controller 5 and position estimator 4B is used instead of position estimator 4 in control device 100B.

[0074] The controller 5B has a current command calculator 6, a d-q current controller 7, a rotating coordinate inverse converter 8, a two-phase-three-phase converter 9, a position estimation voltage generator 10B, a three-phase-two-phase converter 11, a rotating A coordinate converter 12 and an adder 13 . In the controller 5B, the pos...

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Abstract

A control device for a rotating electric machine (1) is characterized by being provided with: a current detector (2) for detecting rotating electric machine current flowing through the rotating electric machine (1); a position estimator (4) for estimating the rotor position of the rotating electric machine (1) on the basis of the rotating electric machine current; a controller (5) for calculating,on the basis of information on the rotating electric machine current and the rotor position, a drive voltage command for driving the rotating electric machine (1) and outputting a rotating electric machine voltage command obtained by adding a position estimation voltage command for each phase of the rotating electric machine (1) to the drive voltage command, said position estimation voltage command being used for estimating the rotor position; and a voltage applier (3) for applying a voltage to the rotating electric machine (1) on the basis of the rotating electric machine voltage command. The position estimator (4) extracts position estimation current included in the rotating electric machine current and changing attributable to the position estimation voltage command and estimates the rotor position of the rotating electric machine (1) from a DC component of the amplitude of the extracted position estimation current, said DC component not changing according to the rotor position.

Description

technical field [0001] The present invention relates to a control device for a rotating electric machine capable of obtaining rotor position information and controlling the rotating electric machine without using a position sensor for detecting the rotational position of the rotor. Background technique [0002] Since the position information of the rotor is required to drive the rotating electrical machine, the conventional control device of the rotating electrical machine uses the position information detected by the position sensor attached to the rotating electrical machine. And from the viewpoint of improving the reliability of the rotating electric machine, a technology for driving the rotating electric machine without a position sensor has been developed. As the position sensorless control method of the rotating electrical machine, there are mainly a method of estimating the position of the rotating electrical machine using an induced voltage of the rotating electrical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/18
CPCH02P6/18H02P21/26H02P2203/03H02P21/18H02P21/22
Inventor 小岛铁也加藤将
Owner MITSUBISHI ELECTRIC CORP
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