Active damping method for basic voltage vector compensation

A basic voltage vector and active damping technology, which is applied in vector control systems, motor generator control, electromechanical brake control, etc., can solve the problems of compensation effect, motor starting performance, and motor performance degradation, etc., to achieve efficiency. The effect of small size, good steady-state performance, and high-speed dynamic response

Active Publication Date: 2022-04-05
DALIAN MARITIME UNIVERSITY
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, RCC injects a damping term into the q-axis reference current, which causes coupling between the damping term and the current loop, resulting in a decrease in motor performance; in addition, the ...

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
  • Active damping method for basic voltage vector compensation
  • Active damping method for basic voltage vector compensation
  • Active damping method for basic voltage vector compensation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0038] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0039] It should be noted that the terms "first" and "second" in the description and claims of the present invention and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate circums...

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 provides an active damping method for basic voltage vector compensation (BVC). Firstly, a high-pass filter (HPF) and a delay link are used for extracting a direct-current link oscillation small signal; then, subtracting a small signal value from the direct current link voltage; and finally, the voltage difference value is used as a direct-current link voltage value for calculating a basic voltage vector of finite control set model prediction current control (FCS-MPCC). Besides, under a small signal model, the input impedance of the system after BVC compensation is deduced, and then the stability of the system before and after compensation is analyzed in detail according to an impedance matching criterion and a Nyquist stability criterion. The BVC active damping method not only has the advantages of FCS-MPCC high-speed dynamic response and good steady-state performance, but also can effectively suppress the DC link voltage oscillation phenomenon caused by a constant-power load. The method is not influenced by the bandwidth of a current loop; the influence on the motor performance is smaller; extra power electronic devices are not needed, and the influence on the efficiency of the inverter is small.

Description

technical field [0001] The invention relates to a DC propulsion system, in particular to a method for suppressing DC link voltage oscillation caused by constant power loads in the DC propulsion system. Background technique [0002] With the development of power electronics technology, DC propulsion system has attracted much attention in ships. Meanwhile, permanent magnet synchronous motors (PMSMs) are widely used as propulsion motors due to their simple structure, high power density, and low loss. Therefore, the LC filter-PMSM cascade system is more common in DC propulsion ships. However, the PMSM drive system has negative impedance characteristics under strict speed regulation and constant load torque, which causes the DC link voltage of the cascaded system to oscillate. This oscillation phenomenon is caused by the mismatch between the output impedance of the LC filter and the input impedance of the load. [0003] Compensation strategy based on reference current (RCC) an...

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
IPC IPC(8): H02P21/14H02P25/022H02P27/06
Inventor 郭昊昊刘彦呈杨鹏明林叶锦张珍睿张勤进于春来陈九霖李冠桦
Owner DALIAN MARITIME UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap