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本文讨论了一个新的适用于可逆薄带轧机卷取系统的无环流快速可逆可控硅系统。在这一系统中引进了一系列综合性措施,计有:(1)磁场并接 RC 回路;(2)时延小于1.5毫秒的换向开关;(3)兼有防消磁过程造成过压作用的直流侧检零线路:(4)序列制触发脉冲;(5)合适的校正网络等。成功地解决了励磁系统中“0”位低频振荡问题,以及由此造成的低张力电流不稳定问题。最小剩磁电压可长期稳定于200毫伏以内(发电机最高电压1000伏),主回路电流上升(或下降)率可达到:200A/6.67ms。这一系统己较长期地应用于1200冷轧机中,装机容量为1450KW 的卷取系统。本文还讨论了在 z 平面内按一次采样增益对这类传动系统进行动态设计的工程方法。实验证明,这样的分析方法与实验结果极为吻合,较之现有的几种方法具有更大的工程实际意义。
This article discusses a new acyclic flow fast reversible thyristor system for reversing strip mill take-up systems. A series of comprehensive measures have been introduced in this system, including: (1) magnetic field connected with RC loop; (2) commutation switch with delay less than 1.5 ms; (3) over-voltage with demagnetization DC line zero check line: (4) Sequence trigger pulse; (5) the appropriate calibration network. Successfully solved the excitation system “0” bit low frequency oscillation problems, and the resulting low-tension current instability. The minimum remanence voltage can be long-term stable within 200 millivolts (generator maximum voltage of 1000 volts), the main loop current rise (or decline) rate up to: 200A / 6.67ms. This system has been used for a longer period of time in a 1200 cold rolling mill with a take-up system with an installed capacity of 1450 KW. This article also discusses the engineering approach to dynamic design of such drive systems with a one-shot gain in the z plane. Experiments show that this method is very consistent with the experimental results, compared with several existing methods have more practical significance.