Comparison of performance between bipolar and unipolar double-frequency sinusoidal pulse width modulation in a digitally controlled H-bridge inverter system

doi:10.1088/1674-1056/22/6/060509

中国物理B ›› 2013, Vol. 22 ›› Issue (6): 60509-060509.doi: 10.1088/1674-1056/22/6/060509

Comparison of performance between bipolar and unipolar double-frequency sinusoidal pulse width modulation in a digitally controlled H-bridge inverter system

雷博, 肖国春, 吴旋律

State Key Laboratory of Electrical Insulation and Power Equipment, School of Electrical Engineering, Xi'an Jiaotong University, Xi'an 710049, China

收稿日期:2012-10-20 修回日期:2012-11-01 出版日期:2013-05-01 发布日期:2013-05-01
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 51277146), the Foundation of Delta Science, Technology, and the Education Development Program for Power Electronics (Grant No. DREG2011003).

Comparison of performance between bipolar and unipolar double-frequency sinusoidal pulse width modulation in a digitally controlled H-bridge inverter system

Lei Bo (雷博), Xiao Guo-Chun (肖国春), Wu Xuan-Lü (吴旋律)

State Key Laboratory of Electrical Insulation and Power Equipment, School of Electrical Engineering, Xi'an Jiaotong University, Xi'an 710049, China

Received:2012-10-20 Revised:2012-11-01 Online:2013-05-01 Published:2013-05-01
Contact: Lei Bo E-mail:leibo@stu.xjtu.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 51277146), the Foundation of Delta Science, Technology, and the Education Development Program for Power Electronics (Grant No. DREG2011003).

摘要/Abstract

摘要： By deriving the discrete-time models of a digitally controlled H-bridge inverter system modulated by bipolar sinusoidal pulse width modulation (BSPWM) and unipolar double-frequency sinusoidal pulse width modulation (UDFSPWM) respectively, the performances of the two modulation strategies are analyzed in detail. The circuit parameters, used in this paper, are fixed. When the systems, modulated by BSPWM and UDFSPWM, have the same switching frequency, the stability boundaries of the two systems are the same. However, when the equivalent switching frequencies of the two systems are the same, the BSPWM modulated system is more stable than the UDFSPWM modulated system. In addition, a convenient method of establishing the discrete-time model of piecewise smooth system is presented. Finally, the analytical results are confirmed by circuit simulations and experimental measurements.

关键词: bipolar simusoidal pulse width modulation (SPWM), unipolar double-frequency SPWM, H-bridge inverter, discrete-time model

Abstract: By deriving the discrete-time models of a digitally controlled H-bridge inverter system modulated by bipolar sinusoidal pulse width modulation (BSPWM) and unipolar double-frequency sinusoidal pulse width modulation (UDFSPWM) respectively, the performances of the two modulation strategies are analyzed in detail. The circuit parameters, used in this paper, are fixed. When the systems, modulated by BSPWM and UDFSPWM, have the same switching frequency, the stability boundaries of the two systems are the same. However, when the equivalent switching frequencies of the two systems are the same, the BSPWM modulated system is more stable than the UDFSPWM modulated system. In addition, a convenient method of establishing the discrete-time model of piecewise smooth system is presented. Finally, the analytical results are confirmed by circuit simulations and experimental measurements.

Key words: bipolar simusoidal pulse width modulation (SPWM), unipolar double-frequency SPWM, H-bridge inverter, discrete-time model

中图分类号: (Nonlinear dynamics and chaos)

05.45.-a

84.30.Jc (Power electronics; power supply circuits) 47.20.Ky (Nonlinearity, bifurcation, and symmetry breaking)

雷博, 肖国春, 吴旋律. Comparison of performance between bipolar and unipolar double-frequency sinusoidal pulse width modulation in a digitally controlled H-bridge inverter system[J]. 中国物理B, 2013, 22(6): 60509-060509.

Lei Bo (雷博), Xiao Guo-Chun (肖国春), Wu Xuan-Lü (吴旋律). Comparison of performance between bipolar and unipolar double-frequency sinusoidal pulse width modulation in a digitally controlled H-bridge inverter system[J]. Chin. Phys. B, 2013, 22(6): 60509-060509.

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Comparison of performance between bipolar and unipolar double-frequency sinusoidal pulse width modulation in a digitally controlled H-bridge inverter system

Comparison of performance between bipolar and unipolar double-frequency sinusoidal pulse width modulation in a digitally controlled H-bridge inverter system

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