Open AccessImproved modulation method with reduced switching frequency for OW‐PMSM system with common DC bus
Author(s) -
Nian Heng,
Ruan Chenhui,
Hu Wei,
Sun Dan
Publication year - 2019
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2019.1070
Subject(s) - modulation (music) , pulse width modulation , electronic engineering , switching frequency , computer science , frequency modulation , control theory (sociology) , electrical engineering , engineering , voltage , physics , radio frequency , control (management) , artificial intelligence , acoustics
To reduce the switching frequency of open‐winding permanent magnet synchronous motor (OW‐PMSM) system with a common DC bus, this Letter proposes a novel modulation method. In this method, the independent modulation is implemented in each phase to generate the reference voltages in the abc reference frame, where only one bridge arm has switching actions. Compared with the existing modulation methods for OW‐PMSM system, the total switching actions within one PWM period can be remarkably reduced to 6 with the control target of the zero‐sequence current suppression achieved, and the modulation range can be kept unchanged. The experimental results validate the availability of the proposed modulation method for OW‐PMSM system.