The Analysis of the Chopper Circuit Commutating with the Auxiliary Thyristor

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概要

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• The motor generators, resistors and inverter-rectifier systems have been used as the electric control device supplied from a DC power source. But, since the thyristor chopper was developed, it's high performance has been expected in many applications such as a speed control device of a DC motor.<BR>The thyristor chopper switches on and off the DC power delivered to the load at high rate, to control it by changing the ratio of the on and off time. And many circuit configurations have been presented for paticular uses. However, a thyristor chopper circuit which is employed an auxiliaiy thyristor in it's commutation circuit seems to be best suited for general applications. The paper presents an analysis and some characteristics of this type of the thyristor chopper circuit.<BR>One cycle of the operation of the thyristor chopper can be divided into six intervals according to the circuit state and the analysis is executed for each interval. The results show that the output voltage of the thyristor chopper with an auxiliary thyristor for commutation consists of three parts: (1) the voltage directly controled by the trigger circuit, (2) the voltage drop due to the circuit elements, (3) the voltage which is affected by the commutation circuit operation. The last part is nearly in inverse proportion to the load current, so that the output voltage of the chopper circuit slightly decreases as the load current increases.<BR>The characteristics of an experimental circuit confirms the results of this analysis.

• 公益社団法人 日本マリンエンジニアリング学会の論文

著者

• 伊丹 潔

  東京都立大学工学部

• 上村 新作

  東京都立大学工学部

関連論文

• サイリスタチョッパによる電磁カップリングの速度制御
• The Analysis of the Chopper Circuit Commutating with the Auxiliary Thyristor
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