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�������պ����ѧѧ�� 2009, Vol. 35 Issue (12) :1477-1482    DOI:
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����DC/AC�任������ЧӦ�����뾫ȷ����
�� �1, �벬��1, ������2, ����Ƽ3*
1. �������պ����ѧ ��е���̼��Զ���ѧԺ, ���� 100191;
2. �ӱ�ʦ����ѧ �����ѧ����Ϣ����ѧԺ, ʯ��ׯ 050016;
3. ̫ԭ����ѧ[KG*2]�����붯������ѧԺ, ̫ԭ 030024
Analysis and accurate compensation of dead-time for three-phase DC/AC inverter
Zhang Jin1, Qi Bojin1, Zhang Shaoru2, Qin Wenping3*
1. School of Mechanical Engineering and Automation, Beijing University of Aeronautics and Astronautics, Beijing 100191, China;
2. College of Physics and Information Engineering, Hebei Normal University, Shijiazhuang 050016, China;
3. College of Electrical and Power Engineering, Taiyuan University of Technology, Taiyuan 030024, China

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Abstract�� A novel approach to compensate the dead-time effect based on the existing no-dead-time technique was presented. The reason of the inverter output voltage distortion was analyzed with the consideration of the dead-time and the non-ideal characteristics of the switching devices. The proposed method was implemented by adjusting the pulse width of the original driving signals to compensate the switching delay and voltage drop effect of the power devices, thus the effects were prevented from propagating into the ac-side. An improved current polarity detecting circuit with high precision was introduced to overcome the difficulties in current polarity detecting around the zero current crossing point. A more accurate output voltage synthesis was obtained with simple logic and flexible implementation, by applying this compensation strategy to a general purpose inverter system. Experimental results verify the effectiveness of the proposed method.
Keywords�� voltage-source inverter   dead-time   harmonic distortion   current measurement     
Received 2009-02-17;
Fund:

����863�ƻ�������Ŀ(2006AA11A145)

About author: �� � (1980-), ��, ������, ��ʿ��, zhangjin_ntu@hotmail.com.
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�� �, �벬��, ������, ����Ƽ.����DC/AC�任������ЧӦ�����뾫ȷ����[J]  �������պ����ѧѧ��, 2009,V35(12): 1477-1482
Zhang Jin, Qi Bojin, Zhang Shaoru,Qin Wenping.Analysis and accurate compensation of dead-time for three-phase DC/AC inverter[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2009,V35(12): 1477-1482
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