scholarly journals A New Type of Super-Sparse Matrix Converter with Γ Source and Its Characteristics Analysis

2021 ◽  
Vol 2136 (1) ◽  
pp. 012028
Author(s):  
Shengqing Li ◽  
Shi Yan ◽  
Jian Zheng ◽  
Heng Zhang
Keyword(s):  
Output Voltage ◽  
Theoretical Foundation ◽  
Low Voltage ◽  
Sparse Matrix ◽  
Matrix Converter ◽  
Transfer Ratio ◽  
Simulink Simulation ◽  
Characteristics Analysis ◽  
New Type ◽  
Simulation Results

Abstract To solve the problem of low voltage transmission in ultra sparse matrix converter (USMC), a novel ultra sparse matrix converter (USMC) is proposed. The new USMC topology contains of a Γ source boost circuit in the DC link. By increasing the output voltage of DC link, the inverter stage can output higher voltage, thus widening the range of voltage transmission ratio. Furthermore, combined with the SVPWM modulation strategy, the voltage transfer ratio of the new USMC topology is derived, which lays a theoretical foundation for the application of USMC. Finally, Matlab / Simulink simulation results verify the correctness and feasibility of the topology.

scholarly journals A New Bridgeless High Step-up Voltage Gain PFC Converter with Reduced Conduction Losses and Low Voltage Stress

Energies ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 2640 ◽  
Author(s):  
Xiang Lin ◽  
Faqiang Wang ◽  
Herbert H. C. Iu
Keyword(s):  
Output Voltage ◽  
Low Voltage ◽  
Voltage Gain ◽  
Simple Circuit ◽  
Voltage Stress ◽  
Circuit Structure ◽  
Power Switches ◽  
Simulation Results ◽  
Conduction Mode ◽  
Conventional Counterpart

Bridgeless power factor correction (PFC) converters have a reduced number of semiconductors in the current flowing path, contributing to low conduction losses. In this paper, a new bridgeless high step-up voltage gain PFC converter is proposed, analyzed and validated for high voltage applications. Compared to its conventional counterpart, the input rectifier bridge in the proposed bridgeless PFC converter is completely eliminated. As a result, its conduction losses are reduced. Also, the current flowing through the power switches in the proposed bridgeless PFC converter is only half of the current flowing through the rectifier diodes in its conventional counterpart, therefore, the conduction losses can be further improved. Moreover, in the proposed bridgeless PFC converter, not only the voltage stress of power switches is lower than the output voltage, but the voltage stress of the output diodes is lower than the conventional counterpart. In addition, this proposed bridgeless PFC converter features a simple circuit structure and high PFC performance. Finally, the proposed bridgeless PFC converter is analyzed and designed in the discontinuous conduction mode (DCM). The simulation results are presented to verify the effectiveness of the proposed bridgeless PFC converter.

Research on Linear Output Voltage Transfer Ratio for Ultrasparse Matrix Converter

2016 ◽  
Vol 31 (3) ◽  
pp. 1811-1815 ◽  
Author(s):  
Changliang Xia ◽  
Shanhu Li ◽  
Yan Yan ◽  
Tingna Shi
Keyword(s):  
Output Voltage ◽  
Matrix Converter ◽  
Transfer Ratio

scholarly journals Carrier-Based PWM Method to Reduce Common-Mode Voltage of Three-to-Five-Phase Indirect Matrix Converter

2016 ◽  
Vol 2016 ◽  
pp. 1-10 ◽  
Author(s):  
Rutian Wang ◽  
Xingjun Mu ◽  
Zhiqiang Wu ◽  
Lihui Zhu ◽  
Qiufeng Chen ◽  
...  
Keyword(s):  
Simulation Model ◽  
Matrix Converter ◽  
Common Mode ◽  
Matlab Simulink ◽  
Absolute Value ◽  
Common Mode Voltage ◽  
Simulink Simulation ◽  
The Common ◽  
Simulation Results ◽  
Input Phase

In order to reduce the common-mode voltage (CMV) for three-to-five-phase indirect matrix converter (IMC), the CMV with the conventional modulation strategy is analyzed. A novel carrier-based PWM (CBPWM) method is proposed in this paper. The zero vectors in the inverter stage are assigned to the rectifier stage, equivalently, which are not considered in the inverter stage. The zero vectors are selected appropriately to ensure that the dc-link is connected to an input phase with the minimum absolute value, so that the larger CMV can be avoided. Then, the modulation signals are derived by the duty ratios, which are used to compare with the only one carrier signal and generate the gate pulses of switches. With the proposed method, the CMV is reduced effectively compared with the conventional modulation strategy. This method is analyzed and researched with a simulation model established by Matlab/Simulink. Simulation results are provided in detail to verify the feasibility and validity of the proposed method.

scholarly journals Capacitor Clamped Coupled Inductor Bi-Directional DC-DC Converter with Smooth Starting

Machines ◽  
2022 ◽  
Vol 10 (1) ◽  
pp. 47
Author(s):  
Kalamchety Srinivasa Ravi Kumar ◽  
Alagappan Pandian ◽  
Vedula Venkata Sastry ◽  
Dogga Raveendhra
Keyword(s):  
Output Voltage ◽  
Input Current ◽  
High Voltage Gain ◽  
Steady State Operation ◽  
Parameter Variations ◽  
New Type ◽  
Voltage Transients ◽  
Simulation Results ◽  
And Control ◽  
Current Transients

In this paper, a new type of capacitor clamped coupled inductor bidirectional DC–DC converter is proposed, which offers high voltage gain with smooth starting current transients, as well as reduced stresses on the capacitor. Steady state operation, mathematical modelling, and state space modelling for the proposed converter are presented in detail. A simplified single voltage clamped circuit is developed to mitigate the voltage spikes caused due to the coupled inductor by recovering the leakage energy effectively. Moreover, the clamping capacitor helps in reducing the ripples in output voltage, which in effect significantly reduces the stress on the switch and offers less ripple content at the load terminals. Simulation of the proposed converter is carried out using Simulink/MATLAB for the conversion of 24V DC to 200V DC. For this conversion, simulation results have proven that there is reduction of 13.64% of capacitor voltage stresses. Further, under line varying conditions, converter responses have proven that there is a 119% and 25.25% reduction in input current and output voltage transients, respectively. Similarly, 25.25% and 76.5% transient reductions of input current are observed for line and control parameter variations. The hardware investigation of the converter was carried out with a 100 W, 24 V/200 V setup. The converter achieved efficiency of 93.8%. The observations supplement the simulation results.

An Improved Space Vector Modulation Method of Matrix Converter

2013 ◽  
Vol 389 ◽  
pp. 796-801
Author(s):  
Jin Sun ◽  
Lei Zhang ◽  
You Min Wang ◽  
Jun Chao Zhang
Keyword(s):  
Low Voltage ◽  
Control Level ◽  
Matrix Converter ◽  
Modulation Method ◽  
Space Vector Modulation ◽  
Space Vector ◽  
Voltage Space Vector ◽  
Transfer Ratio ◽  
Vector Modulation ◽  
Modulation Level

Based on study of space vector modulation, cca novel over-modulation strategy of matrix converter is proposed for the problem of low voltage transfer ratio of matrix converter. According to the relation of the voltage space vector trace and hexagon trace vector, the control level is divided into linear modulation level and over-modulation level. The over modulation strategy is achieved by transforming the voltage modulation coefficient. The simulation results demonstrate that the voltage transfer ratio can be up to 0.955.

The Research of Output Voltage Error of Matrix Converter Decreased under Low Switch Frequency

2014 ◽  
Vol 971-973 ◽  
pp. 1194-1197
Author(s):  
Yi Hui Xia ◽  
Xiao Feng Zhang ◽  
Ming Zhong Qiao
Keyword(s):  
Theoretical Analysis ◽  
High Power ◽  
Output Voltage ◽  
Bipolar Transistors ◽  
Matrix Converter ◽  
Input Current ◽  
Insulated Gate Bipolar Transistors ◽  
Pulse Modulation ◽  
Average Value ◽  
Simulation Results

Its switch frequency can’?t be high because of the restrains of insulated gate bipolar transistors (IGBTS) when high power electrical motor driven by matrix converter. This paper mainly discuses about the reason for output voltage error with low switch frequency. And based on the reasons, a method for decreasing output voltage error is proposed, that is to say that referenced input current and output voltage is calculated by using their average value in one sample in the indirect space vector pulse modulation (ISVPWM) when switch frequency is low. Simulation results coincide with theoretical analysis, verifying that the proposed method is feasible and theoretical analysis is right.

Simulation and Implementation of Single Phase Boost – Buck Rectifier Using SPMC Topology with Reduced Input Current THD

2014 ◽  
Vol 592-594 ◽  
pp. 2199-2203
Author(s):  
Ajay Giri ◽  
Lalit Mohan Saini
Keyword(s):  
Output Voltage ◽  
Single Phase ◽  
Pulse Width Modulation ◽  
Matrix Converter ◽  
Input Current ◽  
Current Harmonics ◽  
Switching Algorithm ◽  
Converter Topology ◽  
Simulation Results ◽  
Boost Rectifier

Simulation of single phase buck boost rectifier with reduced input current THD using single phase matrix converter topology is describing in this paper. Due to the bidirectional feather the operation for buck-boost rectifier can be made through matrix converter topology. And this is possible by the proper switching algorithm to control the switches for their boost and buck operation. The input current nature is almost sinusoidal with low current total current harmonics and the level of THD is below than limit that was defined in the standards of IEEE. With the proper variation in modulation index corresponding changes in the output voltage is observed of buck-boost rectifier. For the synthesis of the output voltage Pulse width modulation (PWM) technique is used. The simulation results using MATLAB/Simulink are providing to validate the feasibility of this proposed method

scholarly journals Multistage DC-DC Step-Up Self Balanced and Magnetic Component Free Converter for Photovoltaic Applications – Hardware Implementation

2017 ◽  
Author(s):  
Mahajan Sagar Bhaskar ◽  
Sanjeevikumar Padmanaban ◽  
Frede Blaabjerg
Keyword(s):  
Output Voltage ◽  
Hardware Implementation ◽  
Low Voltage ◽  
Input Voltage ◽  
Switching Frequency ◽  
Magnetic Components ◽  
Photovoltaic Applications ◽  
Semiconductor Switch ◽  
Converter Topology ◽  
Simulation Results

This article presents a self balanced multistage DC-DC step-up converter for photovoltaic applications. Proposed converter topology is designed for unidirectional power transfer and provides a doable solution for photovoltaic applications where voltage is required to be stepped up without magnetic components. The output voltage obtained from renewable sources will be low and must be stepped up by using a DC-DC converter for photovoltaic applications. (2K-2) diodes and (2K-2) capacitors along with two semiconductor switch are used in the proposed converter to obtain an output voltage which is (K+1) times the input voltage. The conspicuous features of proposed topology are i) Magnetic components free ii) Continuous input current iii) Low voltage rating semiconductor devices and capacitors iv) Modularity v) Easy to add a higher number of levels to increase voltage gain vi) Only two control switches with alternating operation and simple control. The proposed converter has been designed with rated power of 60W, input voltage is 24V, output voltage is 100V and switching frequency is 100 kHz. The performance of the converter is verified through experimental and simulation results.

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