補助共振転流ポール形PWMインバータの損失最小化条件と実用上の問題点

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タイトル別名
  • The Loss Minimizing Condition of the Auxiliary Resonant Commutated Pole PWM Inverter and its Practical Problem
  • ホジョ キョウシン テンリュウ ポールケイ PWM インバータ ノ ソンシツ

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In order to improve the control performance and to make main circuit components small, high frequency switching strategy is applied to PWM inverters. On the other hand, switching loss on the switching devices tends to increase as the switching frequency goes high. To prevent the increase of switching loss, many kinds of resonant type inverter topologies have been proposed. It is called that an auxiliary resonant commutated pole (ARCP) inverter is one of the most suitable topology for PWM control and low switching loss operation. On the other hand, it is reported that efficiency of the ARCP inverter does not so high compared with that of the conventional so-called hard switching inverters on the practical applications. These discussion will be concluded if the theoretical loss estimation of the ARCP inverter is reported.<br>In this paper, a theoretical loss calculation method and a optimum circuit parameter condition for the ARCP PWM inverter is proposed. It is clarified that the efficiency on the optimum circuit parameter condition will rather be increased but it is difficult to use the parameter in the practical application. Then, the modified parameter that is applicable to the practical circuit is obtained. Unfortunately, even on the modified condition, the resultant efficiency does not extremely high compared with that of the conventional hard switching inverter. These results are coincide well with the experimental results on the bread board set-up and the up to present efficiency which are reported on the practical application. By the way, ARCP inverters are going to recognized as the suitable strategies for reducing EMI noise. Then, the proposed loss estimation method and the practical parameter calculation method will be useful for designing the ARCP inverter with low EMI and high efficiency.

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