Application Research of Chaotic Carrier Frequency Modulation Technology in Two-Stage Matrix Converter

Abstract

The harmonics of line to line voltage in two-stage matrix converter (TSMC) with fixed carrier frequency had discrete and high values and produced powerful electromagnetic interference (EMI). In this paper, chaotic carrier frequency modulation technique (CCFMT) was applied in TSMC for the first time to spread sideband range and suppress harmonic peak value. Although this technique could suppress EMI, it would increase the probability of narrow pulses. In order to improve reliability, the rectifier in the two-stage matrix converter uses PWM modulation with zero vector to extend the zero current commutation time, solves the narrow pulse problem, and simplifies the commutation process. At last, an experiment platform was designed and experimental results showed that harmonics of line to line voltage was efficiently suppressed.

Data-Mining for Processes in Chemistry, Materials, and Engineering

“…Similar studies can be found in recent References [58][59][60][61]. Due to the complexity of the structural information and the electronic structures of the periodic table elements [62][63][64][65][66][67][68][69][70][71], a challenge of their data-mining is the definition of suitable descriptors as the model inputs. In the past decades, there was a large number of descriptors that have been applied for the machine learning process of chemical and materials systems, such as bond length, bond angle, and group contribution analysis [72].…”

A Scenario-Based Optimization Model for Planning Sustainable Water-Resources Process Management under Uncertainty

“…Although SIFCP-WRMS has its effectiveness in solving dual uncertainties presented as intervalfuzzy parameters or interval-scenarios, and the results can provide useful strategies for planning the WRMS under the conflict of economic objective, water demand, and sewage discharge, in this study, only one water source (i.e., water from the Water Diversion Project) was considered, and the other water sources, such as surface water, groundwater, and reclaimed water would be further considered to improve the applicability of the SIFCP-WRMS model [43,44]. Moreover, the flow of natural surface water is affected by a variety of factors from climate, topographic, and other aspects, thus, the stochastic programming should be integrated into the SIFCP-WRMS model [45][46][47][48]. Figure 10.…”

Online State of Charge Estimation of Lithium-Ion Cells Using Particle Filter-Based Hybrid Filtering Approach

“…2019GGX103022. In addition, the authors have bene ted a lot from closer collaborations with researcher and partners regarding their works [48][49][50][51][52][53][54][55][56][57] in the eld of electrical engineering, electrochemical engineering, and materials science and engineering. estimation error is relatively at the middle of the test, but it was eliminated later.…”