Control method for the two‐stage matrix converter to enhance the linear voltage transfer ratio

Abstract

The relatively low-linear voltage transfer ratio (VTR) is considered an intrinsic drawback of the conventional two-stage matrix converter (TSMC). However, the studies demonstrate that the linear VTR of the third-harmonic injection TSMC (3TSMC) can push this limit. After reviewing the operating principles and modulation strategy of 3TSMC briefly, the VTR characteristic of 3TSMC is analysed and a control method to enhance the linear VTR is proposed. With the developed method, the maximum linear VTR can break through the intrinsic limit and VTR > 0.866 can be achieved by regulating the input reactive power under arbitrary output conditions theoretically. Finally, simulations and experimental results verify the correctness of the theoretical analysis, and the comparison of 3TSMC and other TSMCs with improved VTR demonstrates the effectiveness of the proposed method.

Analysis of Reliability, Cost and Performance of Three and Five-phase Synchronous Reluctance Machine Drive Systems

“…These multiphase drives' DC-bus, on the other hand, remains a single point of failure. The drawback of this converter was solved using the matrix converter [12][13][14]. Matrix converters convert the input voltage directly to the required output voltage without the use of a DC-link capacitor.…”

“…In [15,16], the performance of a fivephase SynRMs drive system based on a matrix converter was investigated at different loading conditions for both healthy and fault case. Different SynRM drive systems have been introduced in literature with either a three-phase or multiphase configuration and with conventional rectifier-inverters or with matrix converters [7][8][9][10][11][12][13][14][15][16]. The literature lacks the comparison between multiphase drives based on matrix converter and the conventional three-phase drives.…”

Mathematical Modelling, Analysis and Control of a Three to Five-Phase Matrix Converter for Minimal Switching Losses

“…Indirect space vector modulation, operating with the MC as a virtual two-stage converter with a virtual DC link, was introduced in [21]. Different control algorithms that use space vector modulation (SVM) and carrier-based pulse width modulation were used with the MC [22][23][24][25][26][27][28][29]. With the continuous work and development in the area of MCs, the company of Yaskawa presented the first commercial three-phase MC in 2008.…”

Geometrical visualisation of indirect space vector modulation for matrix converters operating with abnormal supplies

“…A good implementation of a suitable modulation is fundamental to achieve good performance from any power converter. Many methods have been proposed for the modulation of MCs [13], including the scalar type methods [14] and vectorial type methods [15,16], to optimise the switching sequence [17], to improve the output quality [18][19][20][21], to increase the voltage transfer ratio (VTR) [22] or to feature the overmodulation capability [23]. Among them, the indirect space vector modulation (ISVM) method is widely used due to its easy implementation [24].…”