Which modulation method is used for three-phase dual-input Dual-Buck inverters?
The traditional modulation method for three-phase dual-input dual-buck inverters is level-shifted sine pulse width modula-tion. The disadvantage of this method is that the dc voltage utilization ratio is low and the software fault tolerance is dificult to realize.
Does a 2 kW inverter improve DC voltage utilization ratio?
A 2 kW prototype was built to carry out experimental research. Experimental results show that this modulation method improves the dc voltage utilization ratio, reduces the loss, and improves the eficiency of the inverter. The aeronautical static inverter (ASI) is key equipment for more electric aircraft (MEA) power systems [1–3].
Does the TP-didbi voltage vector diagram have symmetry?
The TP-DIDBI voltage vector diagram has symmetry. According to this symmetry, the action time of each voltage vector in modulation sectors II, III, IV, V, and VI can be calculated. However, they are not detailed here. Figure 8 shows a composite diagram of the three-phase voltage in each modulation region.
What is a dual Buck inverter (DBI)?
When compared with the traditional bridge inverter, the dual-buck inverter (DBI) has no bridge arm straight-through and the reverse recovery time is shorter [7, 8]. Therefore, the DBI is a com-mon topology for ASIs.
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A Carrier-Based Pulse Width Modulation Algorithm for a …
The traditional modulation algorithm of three-level four-bridge arm inverter adopts 3D-SVPWM (three-dimensional space vector pulse width modulation method), which is difficult to ... {cn}}}}) is the voltage from the midpoint of each bridge arm to the midpoint of the DC capacitor, and (V_{fn}) is the offset voltage. Rewrite Eq. as shown ...
Learn More →A novel neutral-point potential balance control method based on voltage ...
The neutral-point voltage balance control method based on model predictive control is to add the voltage difference term between the upper and lower capacitors of the bus in the objective function and select a reasonable weight factor [27], [28], the switching state that can reduce the midpoint voltage deviation and minimize the objective ...
Learn More →A novel MMC bridge arm protection based on sum current …
Supposing a flashover occurs between A-phase upper bridge arm and MMC end, the flow path of i armup and i armlow in A-phase is shown in Fig. 12. The submodules capacitors C 0 of the A-phase upper bridge arm discharge rapidly to the short-circuit point through IGBTs T 1, as shown in loop ①. The submodules capacitors of the upper and lower ...
Learn More →Bridge Inverter
This basic circuit is called a pole, arm, or a leg. The basic circuit consists of a pair of switches that operate in a complementary manner to perform a rapid switching function to convert the DC power to AC power. ... The load voltage in a full-bridge inverter is a square waveform like the pole voltage, so it contains a lot of harmonics ...
Learn More →Improvements to the H5 inverter topology for …
Inverter bridge arm differential-mode voltage V AB along with the CM voltage and current with the H5 topology and the proposed 2D-H5 topology are presented in Figs. 13b and 14b, respectively. It can be seen that, the CM …
Learn More →The Control Technology Research of the Z-source Three …
Three-phase four-bridge arm inverter[6-7] increases a bridge arm on the basis of the traditional three-bridge arm inverter structure. And this bridge arm constitutes midline and then eliminates the need of the midpoint transformer when the load is unbalanced, reduces the volume and weight of the system. Dq0 rotating coordi-
Learn More →The Control Technology Research of the Z-source Three-phase Four-bridge ...
Z-source inverter can boost the voltage of the DC-side, allo w th e two switches of th e same bridge arm conducting at the same time and it has some other advanta ges.
Learn More →Model Predictive Control Strategy Based on Loss …
Targeting the issue of high losses of individual switching tubes in Neutral-Point Clamped (NPC) three-level inverters, an Active Neutral-Point Clamped (ANPC) three-level inverter is used, and a model predictive control strategy using the loss equalization of the inverter is proposed. This method organizes and analyzes multiple zero-state current pathway …
Learn More →Switch Open-Circuit Fault Diagnosis Method Using Bridge ...
In response to this issue, this article proposes a precise open-circuit fault diagnosis (OCFD) method for phase-shifted LLC resonant converters using the integral of the bridge arm midpoint voltage, aiming to identify the fault location and facilitate maintenance.
Learn More →Switch Open-Circuit Fault Diagnosis Method Using Bridge Arm Midpoint ...
Switch Open-Circuit Fault Diagnosis Method Using Bridge Arm Midpoint Voltage Integral for LLC Resonant Converter. Wei Wang 1, Yang Li 1, Quanjie Wang 1, Chenchen Fang 1, Yingzhou Peng 1, Zhikang Shuai 1. Hide authors affiliations …
Learn More →An Optimized MPC Method for Restraining the Midpoint Voltage …
Conventional Finite Control Set Model Predictive Control (FCS-MPC) suffers from large neutral point voltage fluctuation, cumbersome calculation process, as well as high current Total Harmonic Distortions for 3-level T-type grid-tied inverter. An improved FCS-MPC method is proposed in this paper by directly calculating the switch state''s cost function. This method …
Learn More →Research on Neutral Point Voltage Balancing in Single-Phase …
Figure 4 shows the midpoint voltage u ab, output voltage u o, and output current i o in the bridge arm under the newly proposed H-SVPWM. Through u ab, the inverter operates in a three-level state, with good sinusoidality of the output voltage u o and output current i o, and phase synchronization following.
Learn More →Open-Circuit, Current Sensor Fault Diagnosis of Three
Existing fault diagnosis methods of inverter''s open-circuit faults and sensor faults are mainly for linear loads. With the increasing use of nonlinear loads, a ... First, the ideal bridge arm midpoint voltage and the actual bridge arm midpoint voltage are derived, and empirical wavelets are used for adaptive banding of the bridge arm voltage ...
Learn More →Improved SVPWM modulation method for three-phase …
To solve these problems, an improved SVPWM suitable for this inverter is proposed in this paper. By analyzing the switch modes and bridge arm midpoint level of this …
Learn More →Inverter fault diagnosis algorithm based on midpoint voltage …
This paper proposes a fault diagnosis method of three-phase inverter based on pulse transform. Firstly, the voltage between DC side midpoint and AC side midpoin
Learn More →An EMC performance improvement method for three-phase half-bridge ...
In actual power electronic devices, a switching power supply is generally used as an auxiliary power supply. The high-frequency parameters of the three-phase half-bridge converter and the switching power supply provide a path for transmitting the common-mode voltage signal of the converter [8] so that the converter is switched on and off. The driving voltage is …
Learn More →Switch Open-Circuit Fault Diagnosis Method Using Bridge Arm Midpoint ...
In response to this issue, this article proposes a precise open-circuit fault diagnosis (OCFD) method for phase-shifted LLC resonant converters using the integral of the bridge arm …
Learn More →A unified SVPWM fault tolerant control algorithm for single …
As the three-phase bridge arms are symmetrical, combined with the basic voltage vector calculation method, the distribution of the basic voltage vector of phase B bridge arm fault is the same as ...
Learn More →Three-Level Midpoint Potential Balance and Harmonic …
harmonic content caused by unbalanced midpoint potential in the application of diode midpoint clamped three-level inverters in high-speed motor drive scenarios. Firstly, based on the …
Learn More →Research on Neutral Point Voltage Balancing in Single-Phase …
The neutral point clamped single-phase three-level inverter topology (SPTL-NPCI) renowned for its benefits such as reduced voltage tolerance for switching devices, increased …
Learn More →On-the-analysis and reduction of common-mode voltage of …
On behave of SVM approaches, due to the extra bridge arm, the common SVM based on α β coordinates (i.e. two-dimensional SVM scheme) cannot be adopted. Therefore, a three-dimensional trigonometric calculation based on three-dimensional SVM (3D-SVM) scheme is used, which features several advantages compared to the commonly used CBM approach.
Learn More →Modulation method of parallel interleaved three-level inverter ...
The capacity and equivalent switching frequency of parallel interleaved inverters can be increased, but there are problems with neutral point potential balance and parallel bridge circulating current. This paper regards the parallel three-level inverter as a five-level inverter and five-level space vector integrated modulation is applied. On this basis, a neutral-point potential …
Learn More →A Modified SVPWM Strategy for Reducing PWM …
PWM (pulse width modulation) is the most widely applied current conversion technology, but the high-frequency harmonics it causes have a significant negative impact on inverter system performance. This paper …
Learn More →Simplified implementation of 3L-SVPWM algorithm and …
In the simplified implementation of the SVPWM algorithm, the action sequence of the bridge arm in each region is uniform and regular. Therefore, the neutral-point balance strategy is very simple and convenient by directly adjusting the action time of the bridge arm. The action time of bridge arms is listed in Table 5. In the table, the Max, Mid ...
Learn More →Midpoint Voltage of Bridge Arm Based Fault Diagnosis ...
In order to solve this problem, this article proposes a fault diagnosis method of inverter and phase winding for doubly salient electromagnetic motor (DSEM) based on the …
Learn More →Characteristics of Common-Mode Voltage Offset in Small
T-type three-level inverters (T23LIs) are widely used in the electric drive system of new energy vehicles. However, the open-circuit (OC) faults of their switching devices will cause serious damage to the entire system operation. To mitigate the impact of switching faults, this paper proposes an OC fault diagnosis method based on the variations of common-mode …
Learn More →Variational Half Bridge Series Resonance Intermediate …
17.3 Operating Principle of the Half Bridge Series Resonant Inverter Figure 17.2 has showed the simplified circuit of the half bridge series resonant inverter. The structure of this series inverter is similar with series resonant inverter, the only difference is that is reduced one resonance capacitance C, and it also belongs to the voltage ...
Learn More →Three-Level Midpoint Potential Balance and Harmonic …
VSVPWM each phase of the bridge arm switch state switching times. Simulation results show that the proposed method is feasible and effective。 1 NPC Three level inverter Figure 1 shows the topology of a three-level inverter, with each bridge arm consisting of four power switching tubes and two clamping diodes.
Learn More →Midpoint voltage of bridge arm on totem pole PFC.
As seen in Figure 5, we set the midpoint voltage of the high-frequency bridge arm as V a and the midpoint voltage of the low-frequency bridge arm as V b .When the converter realizes that the input ...
Learn More →Analysis for crosstalk of SiC-MOSFET in a bridge
If the voltage drop on D H is ignored, the voltage at the midpoint of the bridge arm is the bus voltage V dc at this time. The timing waveforms of the corresponding variables are given in Fig. 1 (c). ... Arduino-based three-phase inverter using power MOSFET for application in microgrid systems. Int J Electr Electron Eng Telecommun, 10 (6) ...
Learn More →Open-circuit diagnosis method based on dual-mode voltage …
The core device models of each part are: Optocoupler isolation chip is ACPL-P480; The voltage sensor of the sampling circuit is LV-25P; The three-phase T-type bridge arm are …
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