Improved Modulation Strategy With Reduced Switching Loss for Single-Phase Three-Level T-Type Inverter

Wang, Zhizhen; Li, Xiaoyan; Xing, Xiangyang; Zhang, Chenghui

doi:10.1109/apec39645.2020.9123996

Cited by 3 publications

(1 citation statement)

References 17 publications

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“…On the other hand, the carrier-based modulation methods [22]- [24] for less calculation have been proposed. The discontinuous PWM (DPWM) [22], [23] to reduce the number of switching is presented by controlling one leg is not switched as a hybrid modulation of a two-level inverter [7]. The switching losses can be reduced but the current THD is increased.…”

Section: Introductionmentioning

confidence: 99%

Novel ripple reduction method using three-level inverters with unipolar PWM

Kiatsookkanatorn

Watjanatepin

2021

IJEECS

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This paper proposes a novel method to reduce voltage and current ripple for the inverters by using three-level inverters with unipolar pulse width modulation (PWM) (3LFB-2U). A simple technique of switching signal generation by using carrier-based dipolar modulation of three-phase three-level inverters is extended to single-phase inverters that can be done by generating all possible switching patterns of the single-phase three-level inverters. Moreover, the concept of carrier-based dipolar modulation and the construction of reference voltages from desired output voltage and added zero voltage to control unipolar switching is also shown. The research results reveal that the proposed method can reduce the voltage and current ripple. Furthermore, the voltage and current harmonics can reduce by 27.80% and 1.79%, respectively less than two-level inverters without a loss of a simple modulation to generate the switching signals.

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