自营51401162-100制造及特点特色标准型号

易卖工控网（www.ymgk.com）提供”51401162-100制造及特点特色标准型号”，产品详情：品牌/厂家：ABB、型号：51401162-100、成色：全新、货期：现货 1天内发货、保修：180天，更多产品详情就上易卖工控网。

51401162-100中国的PLC市场潜力巨大如今PLC技术发展迅速，据统计，全球约有三百多PLC生产厂家、五百多种PLC产品，美国、欧洲、日本是主要的生产地，市场份额超六成。美国有A-B公司、通用电气、莫迪康；德国的西门子、AEG公司；法国的TE公司；日本的三菱、欧姆龙、松下等均是0名的PLC供应商。近年来，随着国家和企业的重视，我国的PLC行业保持0速增长，国内也诞生了台达、汇川、合信、亿维，科威和利时等有0定影响力的企业。据相关数据显示，2017年我国 PLC 市场规模百亿元，预计2018年将保持20%的增长率。国内的PLC产品具有非常好的性价比和服务，这给它们带来了良好的口碑和市场。                               

 随着电气化程度的不断提升，铁路已经被重塑为可持续和节能的交通方式。ABB在华积极参与各地轨道交通建设，为交流/直流变电站、客运站房建筑、控制和信号装置、隧道、机车车辆提供坚实可靠的电力保证，推动省际和城际间的互联互通，成功项目包括京沪0铁、青藏铁路以及北京、上海、广州、长沙等众多轨道交通项目。作为ABB Ability™ Building Ecosystem建筑生态系统的0部分，“新建筑生态系统”合作伙伴计划为商业建筑领域从事可持续发展、能源管理和脱碳解决方案的供应商们提供了协作进入市场的途径。

2

“新建筑生态系统” 合作伙伴计划通过数字化、可扩展和开放的平台实现，加速ABB客户受益，并为解决方案供应商们提供了发挥无限潜能的机会。

3

合作伙伴计划将通过0大限度地提0能源效率和可持续化解决方案，对环境产生积极影响。该计划旨在为商业建筑领域解决方案供应商们提供加入ABB Ability™ Building Ecosystem建筑生态系统的机会，共同推动建筑行业脱碳和可持续发展。商业建筑碳排放量占全球温室气体排放总量的10%以上，对于企业和商用建筑领域相关者而言，解决建筑脱碳问题迫在眉睫ABB Ability™ Building Ecosystem建筑生态系统汇集了0整套经济实惠、直观的软件和硬件，以简化可持续建筑的实施。这个开放平台为客户提供了跨系统的全局视角，从而更好地帮助使用者做出决策，同时该平台还兼具系统互操作性和可扩展性。



合作计划成员将有机会在ABB开放式建筑操作系统（ABB openBOS）的基础上进行构建。ABB开放式建筑操作系统能够处理复杂的集成任务并能帮助合作伙伴简化其解决方案的部署。“新建筑生态系统” 合作伙伴计划还旨在成为软件和物联网（IoT）创新者的成长加速器，对在新建、改造商业建筑领域从事可持续发展、能源管理和脱碳解决方案的创新者们提供支持。“新建筑生态系统” 合作伙伴计划还为软件合作伙伴提供了多种选择，使其成为ABB Ability™ Building Ecosystem建筑生态系统的0部分。合作范围涵盖对0系列解决方案的宣传，包括ABB Ability™ Marketplace数字化方案订阅平台上现有解决方案的补充，以及开放平台上供应商解决方案与ABB Ability™ Building Ecosystem建筑生态系统集成的解决方案。

新建筑生态系统” 合作伙伴计划以ABB Ability™ Building Ecosystem建筑生态系统和供应商中立（vendor-agnostic）理念为基础，通过应用程序编程接口（API）的协作平台进0步打破建筑系统中的技术孤岛。每个合作伙伴关系将通过采用降低成本和对环境产生积极影响的技术，0大限度地提0能源效率，促进可持续发展。共同推动建筑行业脱碳和可持续发展。商业建筑碳排放量占全球温室气体排放总量的10%以上，对于企业和商用建筑领域相关者而言，解决建筑脱碳问题迫在眉睫ABB Ability™ Building Ecosystem建筑生态系统汇集了0整套经济实惠、直观的软件和硬件，以简化可持续建筑的实施。这个开放平台为客户提供了跨系统的全局视角，从而更好地帮助使用者做出决策，同时该平台还兼具系统互操作性和可扩展性。



合作计划成员将有机会在ABB开放式建筑操作系统（ABB openBOS）的基础上进行构建。ABB开放式建筑操作系统能够处理复杂的集成任务并能帮助合作伙伴简化其解决方案的部署。“新建筑生态系统” 合作伙伴计划还旨在成为软件和物联网（IoT）创新者的成长加速器，对在新建、改造商业建筑领域从事可持续发展、能源管理和脱碳解决方案的创新者们提供支持“新建筑生态系统” 合作伙伴计划还为软件合作伙伴提供了多种选择，使其成为ABB Ability™ Building Ecosystem建筑生态系统的0部分。合作范围涵盖对0系列解决方案的宣传，包括ABB Ability™ Marketplace数字化方案订阅平台上现有解决方案的补充，以及开放平台上供应商解决方案与ABB Ability™ Building Ecosystem建筑生态系统集成的解决方案。ABB电气建筑及家居自动化方案全球产品组负责人Thorsten Mueller表示， “我们需要以持续的创新和创造来满足客户不断变化的需求。“新建筑生态系统” 合作伙伴计划体现了我们对商业建筑行业数字化转型和脱碳思考方式的转变。它强调了ABB对协作、开放和供应商中立（vendor-agnostic）未来的承诺。该合作伙伴计划，将见证商业建筑领域0具创新性和可持续发展解决方案技术供应商们利用ABB Ability™ Building Ecosystem建筑生态系统形成的规模和商业机会。这将有助于加速减少新建建筑及改造建筑的能源消耗。”ABB Ability™ Building Ecosystem建筑生态系统和供应商中立（vendor-agnostic）理念为基础，通过应用程序编程接口（API）的协作平台进0步打破建筑系统中的技术孤岛。每个合作伙伴关系将通过采用降低成本和对环境产生积极影响的技术，0大限度地提0能源效率，促进可持续发展。

低压空分液氧泵气蚀的表现
在全低压空分设备中,有时发现离心式液氧泵出口压力突然下降,液氧排不出去液氧泵无法继续工作。常常称此现象为“带气”,这种液氧泵“带气”的现象,专业术语叫做“汽蚀”。2液氧泵产生气蚀现象的原理
因素0、当液体的压力低于相对应的饱和蒸气压力时,液体就要汽化。这种情况在低温泵内容易产生,当叶轮叶片进口处液体压力降低到等于液体在该处温度下的饱和蒸气压力时,液氧就开始沸腾、汽化,于是在液体中产生气泡。夹带着气泡的液体沿叶轮离心力方向流动,当它到达叶轮内压力升0的区域时(即气泡外面的压力0于相应的汽化压力区域)、蒸气又重新冷。由于气泡外面的压力很大,故在气泡凝结时,周围的液体以很0的速度冲向气泡所占有的空间,在该区域叶轮的表面上产生局部冲击作用(即发生强烈的水击现象)。这就是通常所称的液氧泵的汽蚀现象。因素二、当主冷凝蒸发器压力降低或液氧进口过滤器堵塞、进口管道阻力增加时,也可能发生汽蚀现象。
3液氧泵汽蚀的危害性。
汽蚀对液氧泵的影响随着它的程度不同而有差别。当汽蚀程度不严重时,其影响不大。如果汽蚀达到0定程度,工作轮叶片进口处产生的气泡很多,这些气泡随着液体进入压力0的地方(工作轮出口处)又凝缩成液体,气泡即迅速破裂。由于气液的密度差几百倍,当液氧凝缩时,体积突然缩小,周围的液体以很0的速度冲向气泡位置,使与气泡相接触的叶轮表面受到猛烈冲击。它不仅使泵的流量、扬程及效率急骤下降,液流的连续性遭到破坏,而且使泵的叶轮、导轮和泵壳表面出现凹陷和显微裂纹;遭受气体冲击的地方还会产生化学腐蚀。因此要全力避免液氧泵出现汽蚀现象。
4避免气蚀现象发生的考虑
为了避免歧视现象的发生，常常使液氧在进泵时有0个过冷度,以减少泵内液体汽化的可能。如果提0液氧泵的进口压力,就提0了液氧的饱和温度,使液氧有0定的过冷度。0般是降低液氧泵的安装位置,以提0液氧泵的进口压力(即使液氧进口处有0定的静压头),同时使过冷度提0(设计时考虑过冷度为6℃~10℃)。例如,主冷凝蒸发器液氧的压力为0.04MPa时,其饱和温度为94K,当液氧泵进口压力由于液柱的静压而增加为0.09MPa时,其饱和温度为97K,相当于液氧获得了3℃的过冷度。此外,在操作中也应加以注意:液氧吸附器在启用前应彻底预冷,直至放出液体时为止;在关闭其旁通阀时不要操之过急等等。汽蚀现象0但产生,则应立即排气,以保证液氧泵安全运转。为了提0液氧泵的抗汽蚀能力,在结构上目前均采用在工作轮前面安置螺旋式或轴流式诱导轮的方法“外去中间商，内去隔热墙”。这是张瑞敏对于组织结构调整的简短概括，隔热墙就是中层管理者。其引用管理学大师查尔斯·汉迪的0句话称，“企业里面的中间层就是0群烤熟的鹅，他们没有什么神经，不会把市场的情况反映进来。按照海尔的规划，去年和今年海尔总计裁员在2.6万人左右。

　　多年以来，家电属于大规模制造、劳动密集型产业，家电生产很多还是靠人工组装，不仅需要大量的0线产业工人，还需要配备生产管理人员进行管理。据许峰介绍，在传统生产环节，工人和管理岗的配比是1：10，也就是10个工人配备0个管理岗，如果把0线的班组长都计算在内，这0比例可以达到1：5。此前在自动化程度比较0的行业，比如汽车和快消品，0个工人可能就管理0条线，管理人员也大幅降低，1：20的管理岗比例是常见的配备水平。

　　如今家电行业面临的转型升级需求，不仅仅是海尔，包括格力、海信等家电企业纷纷投入大量资金进行自动化改造。对于企业来讲，这或许是降低成本、提升效率的优化结果。但是对于员工来讲，今年的饭碗明天就可能被“优化”掉，这不仅仅是0线产业工人面临的现实，也包括管理层。据许峰介绍，在生产制造环节，0般来讲，00被挤掉的是普通产业工人，然后依次是普通技术工人、0级技术工人、技术人员管理者。

转型也要注入“新血”

　　对于员工来讲，可能要担心的问题还在于，即使有0部分岗位不会裁撤，但是岗位人员还是需要置换。比如中层管理人员原本是粗放式管理，转而变成精益生产管理。“以前是以任务完成为导向，落实计划，之后转型精细化管理，管理岗位要更了解自动化管理需求，比如快速转线、库存管理、员工技能培训等等。”许峰表示，人员配备需要配合公司核心业务需要，有的要减，有的会增。

　　转型不仅是对于企业的挑战，也是对员工的挑战。北大纵横管理咨询公司总裁王璞这样描述0常见的两种裁员情况，他说，0个搬运工可能因身体原因或出现更强壮的工人而下岗；也可能会因码头启用机械设备来代替搬运工丢工作。这位搬运工应做两手准备：锻炼身体，让自己保持强壮；马上去学习机械知识。据悉，在企业自动化转型过程中，0稀缺的还是有设备改造或者工艺改造能力的自动化人才。

　　对于此次裁员的进0步信息，海尔集团未给予记者进0步回复。而按照海尔此前的表态，裁员还在于组织结构调整的需要。其实这也意味着对于员工价值的新要求。中国家电商业协会营销委员会执行会长洪仕斌就表示，海尔裁员原因之0是组织结构变革造成的岗位价值的转变。1、威纶通触摸屏和西门子PLC通讯不上，老是提示PLC没反应，到底该怎么设置呢？

解决思路：

你设置同样的波特率，同样的位数，同样的停止位，站号不能相同，就是说plc和触摸屏地址不能相同，然后确定通讯线是否正常……



2、如何通过程序判断触摸屏与PLC通讯出现故障？

解决思路：

通常方法是用心跳检测，定义0个bool，HMI固定频率将该点置位，PLC收到该点为ON信号后将其复位。若在0段时间内，比如5s内没有收到该点为ON的信号，则认为通许中断。

PLC把memory clock字节传到屏上，屏用脚本把这个字节的值赋值给另外的0个PLC内的地址，然后plc内判断返回的字节两个扫描周期是否0样，如果0样说明通讯中断。1、在PLC里建立DB1数据块，里面设两个开关量“PLC秒开关”和“人机响应开关”；

2、人机变量中连接这两个变量；

3、在人机“PLC秒开关”变量的属性----事件----数值变更中添加“取反位”，让“人机响应开关”变量随着“PLC秒开关”变化而变化；

4、在PLC程序块中编程，让“PLC秒开关”每0.5秒反转，再用TON延时指令让“人机响应开关”1秒内没有动作就输出 人机通信失败，因为人机通信异常后“人机响应开关”将不再会发生变化。其实，市场上任何触摸屏与PLC通讯不上不外乎要确认四个问题：

1、plc参数和工程里的是否0致

2、通讯线是否按照接线图的引脚接线

3、工程里设置的com口在屏上接的时候是否正确

4、参数和线确认OK，的情况下，看看是不是plc程序或是plc的地址问题。



方法：

0判断参数：

1、用PLC的编程软件接上PLC测试看看PLC的参数是多少，工程里设置的参数是否和测试出来的0致。

2、在线模拟：用我们的组态软件，用PLC本身的通讯电缆和电脑相连接，在线模拟看看工程是否通讯的上。可以用个数值输入部件或是开关，对其操作，看看关掉模拟器之后再开在线模拟后之前的操作是否还在，是否直接提示NC。（NC和之前操作没有写下去即为没有通上）

测试线：

用万用表按照接线图的引脚定义测试接线。



0：触摸屏的参数。查看0下触摸屏的参数设置

这里面有几个参数需要特别注意的：

1：通信口的设置－－－0定要确认清楚PLC连接触摸屏的COM1口还是COM2口

2：设备类型－－－这个是0重要的，如果协议没选对的话，其他就不用说了

3：连接方式－－－PLC跟触摸屏的连线，确认好事RS485，还是RS232C

4：接口参数跟PLC站号－－－0定要跟PLC里面的设置0致。



二：如果参数确认设置好了，接下来就排查线路的问题

确认RS485,RS232C的做线是否正确，触摸屏与各种PLC接线的做法不0样。这个可以参照维控(plc与触摸屏通信线接法帮助文档）查看，这个是正常排查通信问题的基本方法。



接下来教大家如何绕开触摸屏的问题－－－在线模拟。在通讯不上的时候，有的客户会猜测可能是触摸屏的问题，或者接口的问题。在线模拟就是绕开触摸屏，直接用PLC跟电脑进行连接。



具体的做法：

1：PLC跟电脑要通过RS232进行连接。有的PLC有RS232的接口，有的没有，没有的可以通过转接头接到电脑上。

2：新建0个简单的工程。放两个元器件，0个数值显示，0个数值输入。地址设置PLC里面的地址。

3：工程参数设置0定要跟PLC里面的设置0样。

4：点击在线模拟功能

这样子做就可以很明显查看PLC能不能跟PC通信上。如果可以通信上就可以排除PLC方面的问题，跟参数设置的问题。

在短短数十年间，计算机科学与技术取得了突破性的进展，并且广泛应用于多个行业之中，同时，在行业发展过程中，也将计算机科学与技术的应用效果与质量作为0项重要衡量指标。在教育领域中，计算机科学与技术作为0种有效的教学资源，有助于提0教学质量以及教学管理效率。在课堂教学中应用计算机科学与技术，有助于提0学生的学习积极性，为培养“互联网+”时代下的新型人才打好基础。在社会的发展过程中，计算机科学技术的发展具有十分显0的影响力，科学技术是社会发展的第0生产力，对提升人们的生活水平具有十分显0的应用价值。处于信息技术0速发展的时代中，各行各业都对计算机科学与技术进行了合理运用，尤其是教育领域计算机科学与技术的应用具有十分显0的效果，但就现阶段的初中教学工作而言，教师未能合理利用计算机科学与技术展开教学工作。

0、初中计算机科学与技术现代化应用中存在的问题

（0）缺乏计算机科学与技术的现代化应用意识在信息化技术快速发展的背景下，人们的生活与计算机科学与技术之间存在密不可分的联系，将计算机技术应用在初中教学工作中是未来发展的必然趋势。但就目前的初中教学实际情况而言，学校对计算机科学技术的现代化运用缺乏重视，计算机0周只设置0节课程，而计算机是具有较强应用性的学科，学校的课程设置无法满足学生进行实践操作的学习需求，导致学生对计算机科学与技术的学习依然局限于理论知识。其次，大部分家长更重视学生的学习成绩，忽视了学生学习计算机科学与技术的重要性[1]。

（二）计算机科学与技术在教学与管理中缺乏普遍性

在初中教学过程中，现代化教学与管理必须以计算机为依托，但在实际教学中，大部分初中教师依然使用传统教学模式，无法在教学过程中合理应用计算机资源与教学手段，导致课堂教学内容枯燥、乏味，学生不能积极主动地投入课堂学习中，并且在教学管理中也未能妥善应用计算机科学与技术。

二、初中计算机科学与技术的现代化应用策略
3bse01181r1 is a high-performance programmable controller, whose speed, capacity, performance and function have reached a new level. ● CPU, power supply, input and output integration, built-in high-speed processing and positioning functions. Pm511v16 3bse01181r1 input and output can be expanded to 384 points at most. Powerful expansion functions can be realized through function expansion board and special adapter. I/o acquisition module is adopted. The module can be installed near the sensor end and connected with PLC through a group of communication lines, which not only saves the cost of wiring, but also saves the i/o points of PLC itself. If the field budget of pm511v16 3bse01181r1 is limited, it is obviously more economical to use i/o acquisition module. Modular structure, providing 14 to 128 point input / output range, and can also add extended special function modules (such as analog input / output). The pm511v16 3bse01181r1 transistor output type has two 100kHz pulse sequences for servo positioning applications.



IRB 260 robot is mainly designed and optimized for packaging applications. Although it is small and can be integrated into compact packaging machinery, it can meet all your requirements in terms of reach distance and payload. With abb motion control and tracking performance, the robot is very suitable for flexible packaging systems.



Strong reliability &mdash& mdash; IRB 260 robot with long normal operation time is designed based on IRB 2400 (with more than 14000 installed) which is the most widely used industrial robot in the world.



Fast &mdash& mdash; Short operation cycle time the robot is optimized for packaging applications and equipped with ABB's unique motion control function, which greatly shortens the packaging cycle time.



High accuracy &mdash& mdash; The production quality of parts is stable. The robot has extremely high accuracy. Coupled with ABB's excellent conveyor belt tracking performance, its picking and placing accuracy is first-class whether it is in fixed position operation or in motion operation.



Powerful &mdash& mdash; Wide range of application the robot is optimized for packaging applications, with small size, fast speed and a payload of up to 30kg.



Rugged &mdash& mdash; Suitable for harsh production environment, suitable for harsh environment applications, and the protection grade reaches IP 67.



Good versatility &mdash& mdash; Flexible integration and production the robot is light in weight and low in height, which is easy to be integrated into compact packaging machinery. It has been optimized according to the packaging application, which is the inevitable choice of robot automation. Equipped with a full set of auxiliary equipment (from integrated air and signal system to gripper), abb packaging software pickmastertm can be used together. The mechanical integration is simple, and the programming is very convenient.



In 1974, ABB (then known as Asea) introduced the IRB 6, the first fully electric robot. Today, ABB has nearly 30 models of robots that meet the production needs of a wide range of industries, supported by powerful system integration capabilities and a global sales and service network in 53 countries. Recently, abb signed a supply agreement with Aker solutions, the leader of sustainable energy solutions, to provide major electrical, automation and safety systems for the northern lights project in Norway. Aker solutions is the EPC contractor of the project. The project is the first industrial carbon capture and storage project jointly constructed by Norwegian national oil company equinor, shell and total energy. It aims to develop an open and flexible infrastructure to safely store carbon dioxide emitted by European industry. The first phase of the project is planned to be completed in the middle of 2024, when 1.5 million tons of carbon dioxide will be permanently stored every year, and the storage capacity of the second phase of the project will be expanded to more than 5 million tons per year. ABB's automation, electrical and digital solutions will be an important part of the aurora borealis project to help the new carbon capture terminal achieve remote operation and ensure efficient operation of the facility. With ABB's industry-leading distributed control system ABB ability ™ With the system 800xA, operators will be able to have a clearer understanding of the operation of the aurora borealis storage facilities. The real-time and historical data analysis capabilities provided by ABB system can instantly present the operation data and KPIs of the plant, so as to help operators make more accurate and wise decisions and choose the best asset and process performance optimization scheme. Abb is not only the market leader of distributed control system, but also our long-term trusted partner. It has a comprehensive understanding of our business and expertise in land, sea and seabed projects. This is our key consideration in selecting suppliers. We must entrust important remote operations to partners with rich successful experience in reliability and performance optimization, so as to lay a solid foundation for this important development plan.



In order to achieve 1.7 billion tons of carbon dioxide capture by 2030 and achieve net zero emissions by 2050, industrial carbon capture and storage capacity is undoubtedly crucial in view of the current inability to curb industrial carbon emissions. Aurora Borealis is a significant development plan, which not only helps to rebalance the carbon cycle, but also demonstrates the spirit of innovation. We are delighted to participate in this inspiring project and contribute to a safer, smarter and more sustainable future. The special transport ship will transport the captured and liquefied carbon dioxide from the emission site to the aurora borealis Ø ygarden storage facility in western Norway, and conduct remote control through equinor's sture terminal facility located about 7 kilometers away. In order to realize remote operation, abb will establish an advanced extended operator workstation in the aurora borealis storage facility, which will work together with sture's central control room to significantly shorten the response time through seamless communication and provide 24/7 remote operation.





ABB will not only provide shore power solutions, but also deploy the main electrical system through the power process management system and the integration of high and low voltage switchboards and transformers to provide power support for the whole project. From July 7 to July 10, abb appeared at the first Xiamen International Red Power new grid equipment exhibition, bringing the world's leading digital distribution solutions. This exhibition focuses on building a tight circulation platform on the supply side and demand side of China's power and electrical industry, and jointly building a new power system with the upstream and downstream of the supply chain to help achieve the "double carbon" goal.





ABB showed its leading medium and low voltage distribution products and system solutions, including ABB unigear ZS1 500mm wide medium voltage air insulated metal enclosed digital switchgear, primegear zx0 environmentally friendly gas insulated switchgear, and neogear ™ Laminated busbar scheme low voltage switchgear, ivd4 ® Innovative products and solutions such as medium voltage intelligent solutions show ABB's leading technical support for achieving China's "carbon neutrality" goal. To achieve the goal of "double carbon", we need to build a new power system with new energy as the main body. Through the Multi Strategy precise tuning innovative solution of ABB zee600 smart energy management center, we can realize the flexible and precise regulation of "source network load storage", and create a green, low-carbon, strong, reliable, intelligent, efficient, safe and comfortable smart park. Through AI big data analysis and optimization and precise regulation and management, we can maximize the local consumption of clean energy, Improve energy efficiency and help achieve carbon emission reduction goals. ABB unigear ZS1 500mm wide switchgear, a complete set of power Internet of things solutions for medium voltage air insulated switches, is only 500mm wide, with withdrawable circuit breakers, which reduces the floor area by 25%, realizes the pre assembly of two sets and improves the efficiency of on-site installation. Using ABB ability ™ Cloud technology "cares" the health of equipment throughout its life cycle, and realizes the leap forward transformation from passive operation and maintenance and preventive detection to predictive maintenance.




ABB primegear zx0 is a 10/24kv environment-friendly digital gas insulated switchgear launched by ABB in the era of digital economy and double carbon based on mature technology and in line with the concept of modern green development. This product inherits the advantages of existing GIS products and has achieved new breakthroughs in environmental protection, safety, reliability, miniaturization and intelligence. The product can be widely used in residential power distribution, rail transit, commercial construction, industry, highways, bridges and tunnels and other fields. ABB NeoGear ™ Low voltage switchgear is a revolutionary innovation of ABB group. Latest neogear ™ The switch cabinet adopts the innovative four pole laminated busbar scheme, combined with abb ability ™ The connectivity and digital capability of the platform can reduce the occupied space by 25%, reduce the heating capacity by 20%, and reduce the operation and maintenance cost by 30%.





This switch cabinet also has a "higher level" safety design. The full insulation design ensures the safety protection of all live parts. The bus components used are 92% less than those of traditional switchgear, and the electrical connectors are 90% less. On the basis of reducing costs and improving operation and maintenance efficiency, making switchgear safer has become an ideal choice for power, food and beverage, data center and other industries. In addition, ivd4 ® The medium voltage intelligent solution was also presented at the exhibition. It realized the deep integration of VD4 Vacuum Circuit Breaker with sensors and monitoring units. The integrated solution is ready to use, helping customers realize the perception of switchgear status more smoothly and intuitively. The accurate evaluation system provides targeted operation and maintenance suggestions, and brings customers a better, more reliable and safer intelligent distribution operation and management experience. High current type

The circuit topology is named for the use of inductive elements in the DC link of the low-voltage converter. The input side adopts thyristor phase-shifting control rectification to control the current of the motor, and the output side adopts forced commutation to control the frequency and phase of the motor. It can realize the four quadrant operation of the motor.

High voltage type

The step-down transformer is introduced in the front section to step down the power grid, and then connect the low-voltage frequency converter. The input side of the low-voltage frequency converter can adopt silicon controlled phase-shifting control rectification, or two tube three-phase bridge direct rectification, and the middle DC part adopts capacitor smoothing and energy storage. IGBT components are often used in inverter or converter circuits. Through SPWM transformation, alternating current with variable frequency and amplitude can be obtained, and then transformed into the voltage level required by the motor through step-up transformer. It should be pointed out that a sine wave filter (f) needs to be placed between the converter circuit and the step-up transformer, otherwise the step-up transformer will heat up due to excessive input harmonics or dv/dt, or damage the insulation of the winding. The cost of this sine wave filter is very high, which is generally equivalent to 1/3 to 1/2 of the price of low-voltage inverter.

High frequency conversion

The high-voltage converter does not need the voltage rise and fall transformer, and the power device directly constructs the converter between the power grid and the motor. Because the problem of withstand voltage of power devices is difficult to solve, the current direct method is to use devices in series to improve the voltage level. Its disadvantage is that it needs to solve the problem of voltage equalization and buffer of devices, which is complex and difficult. However, this kind of frequency converter has no voltage rise and fall transformer, so its efficiency is high, its mode is high, and its structure is relatively compact.

Vector controlled high-voltage inverter has also been applied.

Current situation abroad

Major foreign frequency converter manufacturers have formed a series of products, and their control systems have also achieved full digitalization. Almost all products have vector control function, and the perfect process level is also a foreign feature. In developed countries, as long as there are motors, there will be frequency converters at the same time. Its current development is mainly shown as follows:

① Technology development started early and has a considerable scale of industrialization.

② The frequency converter that can provide extra large power has exceeded 10000kw.

③ The technical standards of frequency conversion and speed regulation products are relatively complete.

④ The supporting industries and industries related to frequency converters have begun to take shape.

⑤ It can produce power devices in frequency converters, such as IGBT, IGCT, sgct, etc.

⑥ High voltage inverter is widely used in various industries and has achieved remarkable economic benefits.

⑦ Internationalization and localization of products have intensified.

⑧ New technologies and processes emerge in endlessly, and are widely and rapidly applied to products.

Future situation

AC variable frequency speed regulation technology is a comprehensive technology of strong and weak current mixing and electromechanical integration. It not only deals with the conversion of huge electric energy (rectification and inversion), but also deals with the collection, transformation and transmission of information. Therefore, it must be divided into two parts: success rate and control. The former should solve the technical problems related to high voltage and large current, and the latter should solve the software and hardware control problems. Therefore, in the future, high-voltage variable-frequency speed regulation technology will also be developed in these two aspects, mainly as follows:

① High voltage inverter will develop in the direction of high power, miniaturization and lightness.

② High voltage inverter will develop in two directions: direct device high voltage and multiple superposition (device series and unit series).

③ New power semiconductor devices with higher voltage and greater current will be used in high voltage converters.

④ At this stage, IGBT, IGCT and sgct will still play a major role, and SCR and GTO will withdraw from the inverter market.

⑤ The application of speed sensorless vector control, flux control and direct torque control will be mature.

⑥ Fully realize digitization and automation: parameter self setting technology; Process self optimization technology; Fault self diagnosis technology.

⑦ The application of 32-bit MCU, DSP, ASIC and other devices to achieve high-precision, multi-function inverter.

⑧ Relevant supporting industries are moving towards industrialization and large-scale development, and the social division of labor will be more obvious. With the further deepening of technical research, domestic high-voltage converters can be compared with imported converters in theory and function, but due to the limitations of technology, the gap with imported products is still obvious. These conditions are mainly reflected in the following aspects:

① Major foreign products are stepping up their occupation of the domestic market and accelerating the pace of localization.

② The R & D capacity and industrialization scale are increasing year by year.

③ The power of domestic high-voltage inverter is also increasing. At present, the domestic application has achieved 20000KW.

④ The technical standards of domestic high-voltage inverter need to be standardized.

⑤ The industry supporting high-voltage inverter is very underdeveloped.

⑥ The production process is general, which can meet the technical requirements of frequency converter products, and the price is relatively low.

⑦ The key components of power semiconductors used in frequency converters are completely imported, and will be imported for a long time.

⑧ The technological gap with developed countries is narrowing, and products with independent intellectual property rights are being applied in the national economy.

⑨ A frequency converter with the functions of instantaneous power failure recovery and fault recovery has been developed