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Harmonic current suppression method, device, equipment and storage medium

A harmonic current and current technology, applied in the field of motors, can solve the problems of poor harmonic suppression effect, complex realization form, and high resource consumption, and achieve the effect of good harmonic suppression effect, saving resource consumption, and reducing the amount of calculation.

Inactive Publication Date: 2017-11-07
GUANGZHOU SHIYUAN ELECTRONICS CO LTD +1
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0004] In view of this, the embodiments of the present invention provide a harmonic current suppression method, device, equipment, and storage medium to optimize the existing harmonic suppression scheme in the stator current, and solve the problem of large amount of calculation, high resource consumption, and problems in the software control strategy. The technical problems of complex realization and poor harmonic suppression effect

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  • Harmonic current suppression method, device, equipment and storage medium

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Embodiment 1

[0059] figure 2 It is a flow chart of a harmonic current suppression method provided by Embodiment 1 of the present invention. The harmonic current suppression method provided in this embodiment is applicable to the situation of suppressing harmonics in PMSM. The method for suppressing harmonic current provided in this embodiment may be executed by a device for suppressing harmonic current, which may be implemented in the form of software and / or hardware, and integrated into a device for suppressing harmonic current.

[0060] refer to figure 2 , the harmonic current suppression method provided in this embodiment specifically includes:

[0061] S110. Obtain dq-axis current error parameters corresponding to the current three-phase stator current.

[0062] Wherein, the motor in this embodiment is PMSM. Three-phase stator windings are used in PMSM, thus generating three-phase stator currents. In this embodiment, the three-phase stator currents are respectively used by I u ...

Embodiment 2

[0082] Figure 3a It is a flow chart of a harmonic current suppression method provided by Embodiment 2 of the present invention. This embodiment is embodied on the basis of the above-mentioned embodiments. Specifically, obtaining the dq-axis current error parameters corresponding to the current three-phase stator current includes: performing the first coordinate transformation on the current three-phase stator current to obtain the dq-axis actual current parameters in the dq rotating coordinate system; according to the dq-axis actual current parameters and the current The dq-axis reference current parameters corresponding to the three-phase stator currents determine the dq-axis current error parameters.

[0083] Further, performing proportional-integral resonance control on the dq-axis current error parameters includes: performing proportional-integral control on the DC component in the dq-axis current error parameter to realize error-free tracking of the DC component; settin...

Embodiment 3

[0136] Figure 4 It is a schematic structural diagram of a harmonic current suppression device provided by Embodiment 3 of the present invention. refer to Figure 4 , the harmonic current suppression device provided in this embodiment includes: an acquisition module 301 , a control module 302 and a closed-loop control module 303 .

[0137] Among them, the obtaining module 301 is used to obtain the dq axis current error parameter corresponding to the current three-phase stator current; the control module 302 is used to perform proportional integral resonance control on the dq axis current error parameter, and determine the control parameter according to the control result; closed-loop control Module 303, used to realize the closed-loop control of the motor according to the control parameters.

[0138] The technical solution provided in this embodiment obtains the dq-axis current error parameters corresponding to the three-phase stator currents, and performs proportional integ...

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Abstract

The invention discloses a harmonic current suppression method, device, equipment and storage medium. The method comprises the steps that the dq axis current error parameter corresponding to the current three-phase stator current is acquired; proportional integral resonance control is carried out on the dq axis current error parameter, and a control parameter is determined according to the control result; and closed-loop control is carried out on a motor according to the control parameter. According to the method, the current stator current harmonic suppression scheme can be optimized, and the technical problems of large calculation amount, more resource consumption, complicated implementation and poor harmonic suppression effect in a software control policy are solved.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a harmonic current suppression method, device, equipment and storage medium. Background technique [0002] Permanent magnet synchronous machine (Permanent magnetic synchronous machine, PMSM) refers to a synchronous motor that generates a synchronous rotating magnetic field by permanent magnet excitation. It has the characteristics of small size, high power density, and high efficiency. Therefore, it is widely used in compressors, electric vehicles, etc. and high-speed machine tools. During the operation of PMSM, due to the grouping of motor stator windings, the magnetic saturation effect of the magnetic circuit, the dead zone of the switching tube and the voltage drop of the tube, the stator current of the PMSM includes not only the fundamental wave content, but also the harmonic content. If the harmonic content in the stator current is too large, it will increase the loss of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/22H02P21/00
CPCH02P21/22H02P21/0003
Inventor 邓焕明
Owner GUANGZHOU SHIYUAN ELECTRONICS CO LTD
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