Work

Dual‐Mode Over‐Modulation Strategy for a Two‐Phase Hybrid Stepper Motor Fed by a Six‐Switch Inverter

Year: 2025

Type: article

Abstract: ABSTRACT This paper addresses the limited voltage output capacity when a two‐phase six‐switch inverter is applied to a two‐phase hybrid stepper motor and the issue of still insufficient voltage output capacity after applying a traditional over‐modulation strategy based on the minimum phase error principle. It proposes a dual‐mode over‐modulation strategy by further subdividing the two regions of the conventional strategy and dynamically employing truncation or switching to fundamental voltage vectors based on phase angle. First, the expressions of the action time of adjacent basic vectors and the fundamental amplitude of output voltage are derived under both the traditional over‐modulation strategy and the dual‐mode over‐modulation strategy. Second, the relationship between the reference voltage modulation ratio and both the output voltage modulation ratio and harmonic distortion rate is analyzed. Finally, a platform is built for simulation and experimental verification. Simulation and experimental results show that the proposed dual‐mode over‐modulation strategy improves the maximum output voltage modulation ratio from 0.958 to 1.041 compared to the traditional over‐modulation strategy and improves the voltage utilization by 8.7%.

Source: International Journal of Circuit Theory and Applications

DOI: 10.1002/cta.70285

Authors: Huan Shao, Yuxiang Xu, Huiying Chen, Wenlong Zhu, Yuepeng Zhao, Bangyang Wei

Institutions: Huzhou Normal University, Huzhou College

Language: English

Topic: Multilevel Inverters and Converters

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDGs: Affordable and clean energy, Industry, innovation and infrastructure

Open Access status: bronze

Funders: National Natural Science Foundation of China, Natural Science Foundation of Zhejiang Province