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双语推荐：中频电源

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主要分析新型24脉波中频整流电源的整流原理,讨论网侧的谐波特性。利用MATLAB分析软件,根据实际设备参数分别对采用24脉波整流装置的中频电源与采用传统12脉波整流装置的中频电源进行建模,验证中频电源的谐波特性。仿真结果表明多相整流技术可使中频炉流入电网的谐波含量大大下降,有效改善输出波形。
In this paper,the working principle of new 24-pulse medium-frequency rectifier power sup-ply was analyzed.And the harmonic characteristics of the power networks were discussed.Based on the practical device parameters,the models of 24-pulse rectifier and traditional 12-pulse rectifier of the medi-um frequency power supply were built by using MATLAB .The simulation results showed that the het-erogeneity rectification technology can greatly reduce harmonics,and improve output waveform.

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针对中频电源产生的谐波对供用电电网污染随着其功率的增大比较而越来越严重，文章结合中频电源谐波产生机理，对中频电源的谐波抑制问题及其抑制方法进行研究。
The electric network pollution from medium-frequency power supply harmonic will be increasingly severe with the increase of the power. Based on the mechanism of production of the harmonic, some methods for suppression are introduced.

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研制一种基于TMS320LF2407A数字信号处理器和PS21964智能功率模块(IPM)的智能化SPWM中频逆变电源控制系统.对中频逆变电源的功率主电路、控制电路以及保护电路等进行了详细阐述.实现了中频逆变电源小型化和高性能的技术要求.
The paper introduces an intelligent SPWM medium frequency inverter power supply based on TMS320LF2407A DSP and PS21964 IPM. The power circuit, control circuit and protection circuit of the power supply are presented in detail. It comes true the technological requirements about miniaturization and high-performance of medium frequency inverter power supply.

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经过前期的市场调研考察，及对北京高频机电设备有限公司、十堰高周波机电设备有限公司、十堰凯佳机电设备有限公司中频电源的工作性能、售后服务、市场占有率的综合比较分析，最终决定选用十堰凯佳公司生产的KGPS可控硅中频电源陆续取代中频发电机，实现设备的跟进转型，继续保持汉德公司在中频淬火产品方面的优势。
After a pre-market research study, and the high frequency of Beijing Electrical Equipment Co., Shiyan High Frequency Electrical Equipment Co., Ltd., performance Kai Jia Electrical Equipment Co., Ltd. Shiyan frequency power supply, service, comprehensive comparative analysis of market share, the final decision good selection of Shiyan Kay produced KGPS SCR IF frequency generator power gradually replace achieve follow-up transformation equipment, maintaining Hande advantage in terms of frequency quenching product.

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基于传输线理论,建立了覆冰输电线路外施中频电源融冰技术的理论模型,给出了最佳融冰频率的确定方法。针对不同的覆冰介质损耗角,计算了最佳融冰频率、热功率沿线分布、功率均匀度及电源功率因数等技术指标。研究结果表明,该融冰技术具有融冰功率沿线分布均匀度高、中频融冰电源功率因数接近1的优点。
Based on transmission theory, the theoretic model of power line de-icing with medium frequency excitation is established. How to select the optimal excitation frequency is presented. For different loss tangent of ice layer, the corresponding optimal frequency, heat power distribution and its uniformity, and the power factor of de-icing power source are calculated. Numerical results show that, both heat power distributions with high uniformity and up to 100% power factor can be achieved by using the de-icing technology.

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矿用圆环链的热处理是决定其产品质量和生产效率的关键所在.但由于控制方法和稳定性等原因,目前国内矿用圆环链热处理中所使用的中频感应加热系统往往达不到工艺要求.本设计在对淬火工艺进行深入分析后确定了高质量圆环链淬火前最合理的温度.通过非接触式红外测温传感器对圆环链的淬火温度进行实时检测,结合积分分离PID算法,以PLC为控制核心,利用D/A模块对中频电源控制模块进行控制,A/D模块对系统反馈量进行采集,并通过触摸屏对系统参数进行设置.最终实现对淬火过程的高精度闭环控制.针对工业现场的复杂环境进行了系统控制温度的稳定性分析,从实际投入使用结果来看该系统对中频感应加热设备温度控制精度较高且操作简单方便,人机界面友好,长期运行稳定可靠.
Heat treatment of mining round link chainis is the key to the product quality and production efficiency. But because the control method and stability and other reasons, the medium frequency induction heating system used at presentdomestic chain in mining circular heat treatment often do not meet process requirements. The design determines the high quality chain before quenchingthe most reasonable temperature in deep analysis on the quenching process. The non-contact infrared sensor quenching temperature on the chain for real-time detection, integral separation PID algorithm, using PLC as the control core, control of the intermediate frequency power supply control module uses the D/A module, A/D module to collect feedback of the system, and through the touch screen to set the parameters of the system. The final realization of high precisionto is the closed-loop control of quenching process. In view of the complex environment of the industrial site stability analysis of the temperature c

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针对某电厂1、2号发电机组在运行中频繁发"发电机跳闸"报警,引起机组热工保护PLC动作,使抽汽逆止门关闭的问题进行分析,提出改进措施。分析结果表明:故障产生的原因是保护电源受到干扰,干扰信号通过J1、J3长线路上的等效电容进入到PLC中,引起了"发电机跳闸"保护误动。对原发电机跳闸信号线路进行改进后,抽汽逆止门异常关闭的现象不再发生。
Aiming at the problem of No. 1 and No.2 units in a power plant frequently occurring gen-erator trip in operation, causing programmable logic controller (PLC) action, bringing on extraction check valve closing, to make analysis. The analysis result shows that the causes of the problem are power source of protection device get disturbance, the disturbance signal come into PLC through equivalent capacity on J1 and J3 lines, lead to protection device misoperation of generator trip. Afeter improving trip signal line of the original generator, the phenomenon of extraction check valve abnor-mal closing have never appearance.

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