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无感矢量控制技术在电机低速运转时提供更大的转矩

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China Daily: Light up the Way, Bridge Two NationsTo CMEC Builders in
Pakistan Located in the Indus Plain on the South Asian subcontinent,
Pakistan is a nation with a long history and a profound culture where
power supply ran short for many years and even failed to meet the needs
of people’s everyday life and the country’s economic growth. It was
against such a backdrop that China Machinery Engineering Corporation
(CMEC) got into Pakistan’s power project contracting market thirty years
ago. Since then, CMEC has endeavored to bring about exciting changes on
this ancient land, despite all the challenges. With power plants built
and put into operation one after another, CMEC has brought tangible
benefits to local people and made its due contribution to the
development of the country’s power industry.Over the past three decades,
CMEC builders have been sent in groups to Pakistan. There, they have
worked hard with no complaint and notched up one success after another.
The first came in 1983 when they delivered the 210MW fuel-fired
Generating Unit 4 for the Guddu power plant. Following projects include
the 210MW fuel/gas-fired Units 2, 3, & 4 for the Jamshoro power plant
completed in 1991, the 2×210MW fuel/gas-fired Units 5 & 6 for the
Muzaffargarh power plant completed in 1995, the 320MW fuel/gas-fired
Unit 4 for the Muzaffargarh power plant completed at the end of 1997,
the gate & hydraulic hoist equipment for the 5×300MW Ghazi-Barotha
hydropower plant completed in 2002, the 3000KW hydropower plant
completed in 2004, the turnkey project of the 225MW Saif combined-cycle
power plant completed in 2010, and the NEELUM-JHELUM hydropower plant
under construction.The 210MW fuel-fired Unit 4 of the Guddu power plant
represents China’s debut in the international thermal power market and
the first international engineering project China has contracted and
built based on export seller’s credit. Top Chinese enterprises formed
the most competitive project team and it took the team nearly three
years to complete the project, 22 days ahead of schedule. Through the
project, CMEC made a successful shift from an industrial and trade
company to an outstanding players in China’s international project
contracting sector.The Saif combined-cycle power plant, whose contract
was signed in May 2007, is the world’s first power plant with a
dual-fuel 6FA gas turbine unit. With the joint efforts of the entire
project team, no major equipment quality or safety related accidents
happened from the debugging stage to the end of the warranty period; the
unit maintained stable operation and passed the stability test
successfully. The final completion certificate was awarded in December

【机械网】讯  全球领先的商用车辆系统供应商克诺尔公司与一汽解放汽车有限公司签署战略合作框架协议,成为全方位的战略合作伙伴。此次签约标志着双方的关系迈入新的阶段,未来将在多个层面推进深度合作。  克诺尔与中国一汽解放签署战略合作框架协议  近年来,随着中国物流运输业的快速发展和升级,对于物流装备快速升级成为刚需,中国商用汽车市场出现了新态势、新挑战和新机遇。在此背景下,克诺尔和一汽解放将联手在商用车制动系统和底盘部件及相关技术层面展开更为深入的全面合作。本着为用户创造最大价值的原则,共同为用户提供最佳的系统解决方案。解放事业本部常务副本部长、党委副书记、总经理胡汉杰先生及克诺尔集团全球商用车系统执行总裁Peter
Laier博士出席签约仪式并签署战略合作框架协议。  作为中国汽车工业的摇篮,一汽解放通过坚持自主创新已经发展成为中国领先的商用车制造企业。2017年,一汽解放累计实现销售整车29.7万辆,其中,中重卡26.5万辆,市场份额19.7%,稳居行业第一。克诺尔集团全球商用车系统执行总裁Peter
Laier博士说道,“克诺尔与一汽解放有着深厚的合作基础。本次合作将有助于克诺尔进一步发挥自身在商用车领域全球领先的技术和服务优势,为一汽解放走向国际市场提供强有力的支持,更为推进中国商用车辆在安全、效率和智能互连化的发展进程作出贡献。”  “克诺尔集团拥有世界领先的技术,确保行驶车辆更加安全。”解放事业本部常务副本部长、党委副书记、总经理胡汉杰先生也表示,“与克诺尔的合作将有助于一汽解放积极推进中国商用车先进技术的产业化进程,相关行业技术水平达到全球前列”。  克诺尔商用车亚太区总裁徐保平先生进一步表示,“克诺尔作为一家可以提供完整制动系统技术的供应商,在创新、节能、环保和安全有着自身独特优势。目前,克诺尔已经拥有诸多适用于中国市场的成熟的技术和高可靠性的产品,能够为一汽解放的技术应用和更新提供更好的支持,这也将助力中国领先的整车厂在日益激烈的竞争环境下,在世界市场上更富有竞争力。”  此外,双方决定在品牌合作、产品研发、营销和信息联络等领域加强交流与合作。本次战略合作的签订既是对双方过去合作成果的肯定,也是对未来合作前景的强烈期盼。双方将通过实施全方位的、深层次的战略合作,将技术合作伙伴关系推向新的台阶,合作前景也将更为广阔。  关于克诺尔  克诺尔集团是世界领先的制动系统制造商,也是铁路和商用车辆子系统的供应商。2017年,集团销售总额超过60亿欧元。在30个国家,约28,000名员工从事开发、制造并维护制动、车门、控制和能源供应系统,HVAC和驾驶员辅助系统、转向系统、动力传动以及变速器控制解决方案。作为技术领导者,集团自1905年以来一直通过其产品为公路和铁路提供更大的安全保障作出了重大贡献。每一天,全球超过十亿人口始终信赖克诺尔集团所提供的产品。【打印】
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【机械网】讯  Kc8076faf0f80985adf27e0f66bbeb5c2系列变频器  研发企业:科姆龙电气技术有限公司  产品特点:无感矢量控制技术在电机低速运转时提供更大的转矩;300%的过载能力,确保负载突变的情况下,系统不跳闸。  KV2300系列变频器是科姆龙电气技术(亚洲)有限公司继KV2000无感矢量变频器之后,推出的又一新型变频器产品。该产品可广泛用于传送带、挤出机、提升机及风机、泵类负载。从自身的产品到数控机床、纺织机械等工程项目,高精度控制及高效节能特性在诸多领域都比KV2000型产品有较大程度提升。  KV2300系列变频器是新一代广泛应用的多功能标准变频器,使用先进的无感矢量(Sensor-Lessvector)控制技术,为电机在低速运转时提供更大的转矩,可自动补偿高负载时马达的转速变动。交流传动用于控制电机的速度和转矩,这不仅扩大了电机转速的调速范围,使电机转速能够从零到高于额定转速的范围内变化,而且提高了传动过程中的生产效率,从而达到节省能源的目的。  该系列电机具有良好的动态特性,同时具备超强的过载能力,200%时达到60秒,250%达到30秒,300%时可以瞬间保护。300%的过载能力确保了负载突变的情况下,系统不跳闸,从而保证了生产过程的连续性。  真正的电流矢量控制所拥有的高性能、多功能,可以使各式各样的机械设备在高效率、高精度状态下运行。KV2300系列采用无感矢量控制技术,电机在低速时转矩大,速度精度高,功能齐全,能够自动侦测电机动态运转的参数并作出相应调整,以保证电机运转在最高效率状态。  此外,该系列变频器还采用了IP54防护等级,成功地大幅度降低了对电机及电源造成的不良影响,解决了变频器的潜在问题,同时提高了机械设备等级。【打印】
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  1. It was put into operation one month ahead of schedule despite that
    construction had started half a year later than three other units of the
    same category in Pakistan.CMEC contracted the NEELUM-JHELUM hydropower
    plant project in 2007, for the design, supply, installation and
    construction of metal structures, and electrical and mechanical
    engineering. The power plant, known as the “Three Gorges Project in
    Pakistan”, is the largest one of its kind in the country with the
    largest underground works in Asia and the largest surge shaft in the
    world.From the Guddu power plant to the NEELUM-JHELUM hydropower plant,
    CMEC has witnessed the initial development of power plants in foreign
    countries. Based on the understanding of international practice and
    rules about contracting international power project, CMEC has developed
    its rules and approaches for the management of international projects as
    well as a team with strong international trade background and rich
    hands-on and technical experience in the organization and management of
    international projects.Through 30 years of endeavor, CMEC has grown into
    a leading international project contractor and service provider. The
    international projects it has contracted and the international trade it
    has engaged in involve more than 150 countries and regions across the
    five continents. The projects cover such fields as electrical power,
    transport, electronic communications, housing construction,
    manufacturing and processing plants, environmental protection, mining
    and resource exploitation. Its performance in the electrical power
    sector is particularly outstanding. By the end of 2011, CMEC had
    completed three 600MW supercritical coal-fired power plants.Looking back
    at those hard years in Pakistan’s power project contracting market, CMEC
    will continue to press ahead and make the greatest efforts to promote
    the cooperation with Pakistan in an all-round and in-depth manner and
    push the China-Pakistan friendship to a new stage, based on the
    principle of sincerity and mutual benefit.分享:.fenxx
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