一个对称的单相二极管辅助双提升Z源切换电容器七级逆变器与修改的SPWM
Semko Hosseini1, Seyed Hossein Hosseini2,3, Mehran Sabahi4
1Faculty of Electrical and Computer Engineering, University of Tabriz, Tabriz, 51666-16471, Iran. semkohosseini@tabrizu.ac.ir.
Scientific reports
|November 27, 2025
概括
这项研究介绍了一种新的无变压器双增压Z源逆变器 (DB-SC7LI),采用修改后的调制策略. 它有效地减少了泄漏电流,被动元件和总波扭曲,以改善功率转换.
科学领域:
- 电气工程 电气工程
- 电力电子 电力电子 电力电子
- 可再生能源系统可再生能源系统
背景情况:
- 无变压器逆变器对于可再生能源的整合至关重要.
- Z源逆变器提供了独特的优势,如固有的电压提升和射击免疫力.
- 现有的设计面临着漏电流,被动元件数量和控制复杂性的挑战.
研究的目的:
- 引入一个先进的对称单相变压器无双提升Z源逆变器 (DB-SC7LI).
- 为提高性能和减少组件数量制定修改后的调制策略.
- 验证拟议的拓在减轻泄漏电流和提高电源质量的有效性.
主要方法:
- 设计一种新的DB-SC7LI拓与简化的阻抗网络.
- 实施精细的调制策略,使多个电压级别的射击状态能够实现.
- 使用PSIM软件进行模拟,并使用1kW原型进行实验验证.
主要成果:
- 与类似的拓相比,被动元素的显著减少.
- 有效地减轻泄漏电流和冲进电流.
- 在电网注入的电流中,尽量减少输出电压波动 (Δv) 和总波扭曲 (THD).
- 增强电压增益和免疫力.
结论:
- 拟议的DB-SC7LI具有修改调制,为单相网联应用提供了优质的解决方案.
- 该设计实现了减少组件数量,提高功率质量和提高可靠性.
- 该拓适用于太阳能发电系统,在不同条件下表现出强大的性能.
相关概念视频
01:20Half wave rectifier
2.4K
A half-wave rectifier is a fundamental circuit in electronics, designed to convert alternating current (AC) voltage into a unidirectional voltage. It utilizes the simplest form of diode rectification, where the circuit comprises a single diode in series with a load resistor and an AC power source.
2.4K
01:22Full wave rectifier
2.6K
A full-wave rectifier is a device that converts alternating current (AC) to direct current (DC) and is more efficient than its half-wave counterpart. It typically includes a center-tapped transformer, two diodes, and a load resistor. The secondary winding of the transformer is divided to provide two equal voltages of opposite polarities, which is the pivotal element of full-wave rectification.
2.6K
01:23Voltage Doubler Circuit
1.6K
A voltage doubler circuit integrates two main components: a clamping section and a rectifier section. The clamping section consists of a capacitor (C1) and a diode (D1), whereas the rectifier section is equipped with another diode (D2) and capacitor (C2). This circuit produces an output voltage with twice the amplitude of the sinusoidal input voltage.
1.6K
01:24Bridge rectifier
1.4K
The bridge rectifier is essential in electronics for efficiently converting alternating current (AC) to direct current (DC). Comprised of four diodes configured in a bridge layout, this rectifier effectively processes both the positive and negative halves of the AC waveform, making it superior to half-wave and full-wave center-tapped rectifiers in terms of voltage regulation and output stability.
Operationally, the bridge rectifier allows current flow through two of its diodes during each...
Operationally, the bridge rectifier allows current flow through two of its diodes during each...
1.4K
01:22MOSFET: Enhancement Mode
750
Enhancement-mode MOSFETs are pivotal components in electronics, distinguished by their capacity to act as highly efficient switches. They are part of the larger family of metal-oxide Semiconductor Field-Effect Transistors (MOSFETs). They are available in two types: p-channel and n-channel, each tailored to specific polarity operations.
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no...
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no...
750
01:20Design Example: Capacitance Multiplier Circuit
1.4K
In integrated circuit technology, a capacitance multiplier is often utilized to produce a larger capacitance value when a small physical capacitance falls short. This is achieved by a circuit that multiplies capacitance values by a factor of up to 1000, such that a 10-pF capacitor can replicate the performance of a 100-nF capacitor.
The circuit illustrated in Figure 1 below incorporates two op-amps, with the first operating as a voltage follower and the second acting as an inverting amplifier.
The circuit illustrated in Figure 1 below incorporates two op-amps, with the first operating as a voltage follower and the second acting as an inverting amplifier.
1.4K