著者

寺家 尚哉 深見 正 小山 正人 満田 宇宙 伊藤 一将 山田 正樹

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌D(産業応用部門誌) (ISSN:09136339)

巻号頁・発行日

vol.140, no.7, pp.542-549, 2020-07-01 (Released:2020-07-01)

参考文献数

16

被引用文献数

6

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This paper presents a new type of axial gap motor, called the flux-modulating hybrid field motor (FHM). For flux modulation, the FHM has rotor iron pieces sandwiched between two stators, the armature and field poles. The field poles comprise permanent magnets and electromagnets, and the magnetic flux of the electromagnets can be adjusted by changing the field current. To validate the principle of this FHM, a 0.8-kW prototype machine was fabricated, and the basic characteristics of the prototype machine were investigated through experiments and three-dimensional finite element analysis. The results show that the torque can be varied in a wider range by changing the armature current vector and field current.

著者

川畑 隆夫 小山 正人 玉井 伸三 藤井 俊行 打田 良平

出版者

The Institute of Electrical Engineers of Japan

雑誌

電気学会論文誌D(産業応用部門誌) (ISSN:09136339)

巻号頁・発行日

vol.113, no.7, pp.865-873, 1993

被引用文献数

6 12

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A new PWM method of the three-level inverter using a digital signal processor, which is useful for large capacity instantaneous current controlled GTO inverters is presented.<br>In case of the three-level inverter, short pulses are always necessary to output medium voltage vectors. The output waveform deteriorates from the ideal PWM waveform by the influence of the minimum pulse width limit of the GTO thyristors.<br>In this PWM method, firstly, the switching sequences of voltage vectors which enable the neutral voltage balance control are selected.<br>And then, from these sequences of voltage vectors, sequences which are not affected by the minimum pulse width limit of GTO are selected.<br>Using these switching sequences, the voltage vector mean value control PWM method based on the space-vector control is proposed.