Matrix converter filter parameter optimization method
A matrix converter and filter parameter technology, which is applied in the direction of converting AC power input to AC power output, output power conversion devices, electrical components, etc. Exceed and other problems, to achieve the effect of saving the sensor that collects the filter capacitor voltage, improving the suppression effect, and improving the economy
Inactive Publication Date: 2021-09-28
HUZHOU COLLEGE
View PDF0 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
In the passive damping method, the damping resistance is very important to the performance of the system. If the damping resistance is too large, it may still cause input resonance. If the damping resistance is too small, the loss on the damping resistance will increase, and at the same time, the suppression effect in the high frequency band will decrease. , and even make the main harmonic content in the system exceed the upper limit stipulated by the national standard and limit its application
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[0044] This embodiment provides a method for optimizing filter parameters of a matrix converter. The matrix converter is a direct AC-AC converter, and its topology is as follows: figure 1 As shown, in the figure u abc is the three-phase input phase voltage; i abc is the three-phase input phase current; S ij (i=a,b,c; j=u,v,w) is a bidirectional switch tube, generally composed of two power tubes in reverse series; Z L is the load impedance.
[0045] In order to suppress the input current resonance caused by the input LC filter, it is generally used to connect a resistor in parallel or in series with the filter inductor or capacitor. Considering the suppression effect of resonance and the reduction of system loss, etc., a damping resistor is often installed on the inductor. R d The way to suppress the resonance, its equivalent circuit such as figure 2 As shown in the figure, L f , R' are filter inductance and equivalent resistance respectively; C f Is the filter capacito...
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
Login to View More Abstract
The invention discloses a matrix converter filter parameter optimization method, and relates to the technical field of matrix converter control, and the method comprises the steps: selecting and obtaining the values of a filter inductor and a filter capacitor according to the constraint condition of an input side LC filter and the easy purchase of elements; acquiring the actual content ratio and the fundamental current amplitude of different harmonic currents near a resonance point in the input current under the condition of no damping resistance through simulation analysis; acquiring the upper limit of the current content of main harmonic waves near a resonance point through the standard IEC6100-3-2, and obtaining a damping resistance calculation value for restraining different subharmonic current through calculation; comparing the resistance value with a common resistance value series table to obtain an actual value of the damping resistance; and analyzing the input performance of the matrix converter under the condition of different actual damping resistance values to obtain the actual damping resistance value under the optimal input performance. According to the invention, the content of harmonic current near an input resonance point is effectively suppressed, the attenuation effect of high-frequency-band harmonic waves is considered, the control difficulty and the system cost are reduced, and the stability of the input side is greatly improved.
Description
technical field [0001] The invention relates to the technical field of matrix converter control, in particular to a matrix converter filter parameter optimization method. Background technique [0002] The matrix converter is a direct AC-AC converter. In addition to the advantages of small size, high power density, easy to realize sinusoidal control of input current and convenient power factor adjustment, at the same output frequency, the power tube node in the matrix converter system The temperature is lower, and the loss of the filter inductance on the input side is small, and the efficiency of the whole machine is higher than that of the conventional AC-DC-AC converter. The application field of matrix converter is mainly concentrated in three-phase AC motor drive, including three-phase induction motor, sine wave permanent magnet synchronous motor and brushless permanent magnet synchronous motor and other motor applications. [0003] An LC filter is installed on the input ...
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
Login to View More IPC IPC(8): H02M1/12H02M5/293
CPCH02M1/12H02M5/293
Inventor 许宇翔王培良蔡志端雷能玮
Owner HUZHOU COLLEGE