Research on Phase Current Reconstruction for DPWM2 of Induction Motor Drive System Based on DC-Link Current Sampling

被引:4
作者
Song, Pengyun [1 ,2 ]
Wang, Huazhang [1 ]
Zhang, Junyi [1 ]
Liu, Yanghui [1 ]
Deng, Tao [1 ,2 ]
机构
[1] Southwest Minzu Univ, Coll Elect Engn, Chengdu 610225, Peoples R China
[2] Southwest Minzu Univ, Inst Natl Prod Dev, Chengdu 610225, Peoples R China
关键词
discontinuous pulse width modulation (DPWM); DC-link current sampling; three-phase current reconstruction; time compensation; phase shifting; 3-PHASE CURRENT RECONSTRUCTION; CURRENT SOURCE INVERTER; CURRENT SENSOR; MODULATION;
D O I
10.3390/machines10111104
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
In order to reduce the switching loss and cost, as well as improve the reliability of the induction motor (IM) drive system, the technology involving the three-phase current reconstruction of 60 degrees discontinuous pulse width modulation (DPWM2) is studied in this paper. According to the analysis of the switching state for DPWM2 in different sectors, the three-phase current can be constructed by sampling the voltage of the DC-link resistor. When the target voltage vector is located near the sector boundary or in the low-modulation area, the duration of the active vector in the sampling period is less than the voltage sampling time, which leads to measurement errors of the DC-link current. Therefore, on the basis of the switching state in different unmeasured areas, a time compensation method combining phase shifting and frequency reduction is proposed, and the expressions for comparing values are derived. Lastly, a simulation model and an experimental platform are established to validate the accuracy of the proposed method.
引用
收藏
页数:19
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