東洋電機技報 第126号

※ 技術論文、開発レポート、製品解説については東洋電機技報本文からの抜粋です。


Control Strategies of Active Power Line Conditioners in Single-Phase Circuits

田中 俊彦、高橋 圭介、穐吉 啓史
Toshihiko Tanaka, Keisuke Takahashi, Hirofumi Akiyoshi

This paper deals with two control strategies for the active power line conditioners in single-phase circuits. The first one is a constant dc capacitor voltage control based strategy, which is commonly used in the active power line conditioners. Any detection blocks of the fundamental active, reactive, and harmonic components are not necessary in this method. Thus we offer the simplest way to compensate the fundamental reactive and harmonic currents on the source-side. The other is a reactive power control based strategy, which is with the correlation and cross-correlation coefficients between the feeder voltage and load current. Controlling the detected fundamental reactive component with the cross-correlation coefficient on the source-side reduces the capacity of the PWM inverter, which performs the active power line conditioners. The basic principles of the proposed control strategies are discussed in detail, and then applied to the single-phase active power line conditioners in single-phase based distribution systems. These singlephase distribution systems are used in the single-phase three-wire systems and electrified railways. The validity and excellent practicability of the proposed control strategies are confirmed by experimental results.

1983年に赤木氏等により、三相回路における瞬時無効電力理論が発表された。この三相回路の瞬時有効無効電力理論は、pq理論とよばれ、アクティブパワーラインコンディショナやSTACOMの実用化に大きく貢献している。このpq理論の優れた実用性が多くの研究者等によって明らかにされている。一方、単相回路における瞬時有効無効電力については、著者等が知る限り報告例が少ないのが現状である。齋藤氏等はHilbert変換を用いて単相回路における瞬時無効電流を明快に定義している。しかしながら、実験装置を構成する際にHilbert変換を数値微分によって実現しているため制御回路内で不安定動作が生じる可能性がある。J. Xi氏等は単相pq理論を提案し、その有用性を検証している。検出した電圧および電流をそれぞれ90°位相を遅らせて検出した電圧・電流の直交成分を検出し、これらから赤木氏等が発表したα -β座標上におけるpおよびqを演算している。しかしながら、90°位相シフトブロックが2台必要で、さらに、pq理論と同様の演算を実現するため、数多くの乗算や除算の演算が必要となる。したがって、明快で、かつ、実用性の高い単相回路における有効・無効電流検出法および単相回路におけるパワーラインコンディショナの制御法が求められている。


Direct drive system

北条 善久、赤池 勝利、高橋 一樹、安齋 英二
Yoshihisa Hojo, Katsutoshi Akaike, Kazuki Takahashi, Eiji Anzai

ED Motor (Interior Permanent Magnet Synchronous Motor) which has the characteristics of compact size and high-efficiency applies to various areas of industrial drive and gets a favorable reception. In order to obtain low speed and large torque by industrial drive, though deceleration is usually performed by gear unit, for the first time, we market direct drive system in combination with direct drive motor (DDM) which attains low speed and large torque without gear unit by multipolarity of pole number of motor as well as servo driver VF66SV which controls DDM with a high degree of accuracy. Direct drive system of 11kW, 20r/min, and 5252Nm we introduce in this article achieved the deviation of 0.001% / rated speed for speed command at rated speed of 20r/min to 0.002r/min.
We envisage direct drive system's applications as casting roll in film manufacturing line, servo press, and evaluation equipment for durability of torsion such as shaft. Because the specifications required for DDM are different for every application, we take care of DDM by satisfying our customers' needs.


Ticket Issuing Handy Terminal (DTC700)

安部 充、長谷川 洋
Mitsuru Abe, Yoh Hasegawa

Adding new function to the previous Model DTC500, Toyo Denki Seizo have developed new Model, called ‘DTC700’which has improved usage. In principle, Ticket Issuing Handy Terminal is the machine that is used by conductor to issue a ticket in the train. Recently, the machine are used for relieving conductor's job as a result of providing communication function to the machine. We will introduce the features of latest Mode DTC700 as follows.


※ 第1号~第104号は目次のみの掲載です。