Enhance-Boost Switched-Capacitor/Inductor QZSI with High Step-up Pulse Width Modulation

Multilevel inverters have been widely used in various industrial applications such as renewable energy generation and electric vehicles. An improved circuit of symmetrical cascaded switched-capacitor multilevel inverter is proposed so that the reactive power is absorbed by its power supply instead of capacitors. Then, a special hybrid pulse width modulation strategy combing level-shifted pulse width modulation (LS-PWM) and phase-shifted pulse width modulation (PS-PWM) was developed for the inverter. With this modulation algorithm, the power between cascaded units is automatically balanced, and the voltage of the capacitor in each unit is also automatically balanced to the dc input voltage. In addition, the optimized capacitor voltage ripple makes it possible to use a smaller capacitor to produce a better output voltage waveform. Theoretical analysis, simulation and experimental results show that the equivalent switching frequency of the cascaded multilevel inverter is twice the original frequency so that the output voltage harmonics are only distributed near even multiples of the carrier frequency.

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Simulation of Switched Capacitor Inverter Topology with Boost Facility

International Journal of Recent Technology and Engineering - 2 ◽

10.35940/ijrte.b2363.098319 ◽

2019 ◽

Vol 8 (3) ◽

pp. 616-619

Keyword(s):

Pulse Width ◽

Pulse Width Modulation ◽

Low Voltage ◽

Low Frequency ◽

Switched Capacitor ◽

Voltage Level ◽

Switching Losses ◽

Photo Voltaic ◽

Simulation Results ◽

Inverter Topology

Simulation of switched capacitor inverter topology with boost facility is presented in this paper. The main merits of this inverter topology with boos facility are highly adaptable for Photo Voltaic (PV) applications. The inverter is capable of boosting up low voltage DC into high voltage DC and then invert it to the required voltage level with a single stage. The switched capacitor inverter has a special extended structure, which minimizes the number of components and devices when compared to the other inverter is switched by the means of level shifting carrier based Pulse Width Modulation (PWM) technique. Further, some of the switches in the topology operate in the low frequency and this resulted in a reduction in switching losses thereby increasing the efficiency. This maintains the capacitor voltages at a balanced level. The simulation results are verified through MATLAB/Simulink.

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Single‐switch single‐inductor multi‐output pulse width modulation converters based on optimised switched‐capacitor

IET Power Electronics ◽

10.1049/iet-pel.2014.0743 ◽

2015 ◽

Vol 8 (11) ◽

pp. 2168-2175 ◽

Cited By ~ 11

Author(s):

Yuanmao Ye ◽

Ka Wai Eric Cheng

Keyword(s):

Pulse Width ◽

Pulse Width Modulation ◽

Output Pulse ◽

Switched Capacitor

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New conceptual three-phase current-fed soft switching pulse width modulation converter with switched capacitor type resonant dc link

International Journal of Electronics ◽

10.1080/002072199132815 ◽

1999 ◽

Vol 86 (10) ◽

pp. 1295-1310 ◽

Cited By ~ 3

Author(s):

Yoshihiro Konishi ◽

Masaki Ishibashi ◽

Naoya Baba ◽

Eiji Hiraki ◽

Mutsuo Nakaoka

Keyword(s):

Pulse Width ◽

Pulse Width Modulation ◽

Soft Switching ◽

Switched Capacitor ◽

Phase Current ◽

Three Phase

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The 1-Bit Instrument

Journal of Sound and Music in Games ◽

10.1525/jsmg.2020.1.1.44 ◽

2020 ◽

Vol 1 (1) ◽

pp. 44-74

Author(s):

Blake Troise

Keyword(s):

Pulse Width ◽

Pulse Width Modulation ◽

Interleaving Techniques ◽

Sonic Environment

The 1-bit sonic environment (perhaps most famously musically employed on the ZX Spectrum) is defined by extreme limitation. Yet, belying these restrictions, there is a surprisingly expressive instrumental versatility. This article explores the theory behind the primary, idiosyncratically 1-bit techniques available to the composer-programmer, those that are essential when designing “instruments” in 1-bit environments. These techniques include pulse width modulation for timbral manipulation and means of generating virtual polyphony in software, such as the pin pulse and pulse interleaving techniques. These methodologies are considered in respect to their compositional implications and instrumental applications.

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