• ISSN 0258-2724
  • CN 51-1277/U
  • EI Compendex
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Volume 22 Issue 3
Jun.  2009
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Article Contents
FENG Xiaoyun, SONG Wensheng. Implementation of Space Voltage PWM Method and Neutral-Point Voltage Control for Single-Phase Three-Level Rectifiers[J]. Journal of Southwest Jiaotong University, 2009, 22(3): 347-353.
Citation: FENG Xiaoyun, SONG Wensheng. Implementation of Space Voltage PWM Method and Neutral-Point Voltage Control for Single-Phase Three-Level Rectifiers[J]. Journal of Southwest Jiaotong University, 2009, 22(3): 347-353.

Implementation of Space Voltage PWM Method and Neutral-Point Voltage Control for Single-Phase Three-Level Rectifiers

  • Received Date: 12 Nov 2008
  • Publish Date: 20 Jun 2009
  • An improved SVPWM (space voltage pulse width modulation) method and a novel neutral-point voltage control method were proposed by analyzing the operating principle of single-phase three-level NPC (neutral-point-clamped) voltage-source rectifiers and the disadvantages of the conventional single-phase three-level SVPWM and the neutral-point voltage control method. In addition,a computer simulation was done,and a low power prototype was designed and implemented. The theoretic analysis,computer simulation and experiment results show that in the condition of a constant frequency,the SVPWM method can obtain litter switch wasting and symmetric PWM drive signals,the high harmonic frequencies of the line current is close to twice switch frequency,and the method is easy to implement in DSP (digital signal processor). Whether the load is variational or constant,the proposed neutral-point voltage control method can solve the neutral-point voltage problem effectively and resist disturbance strongly,and it is easy to implement.

     

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