Direct current has many advantages over conventional ACs that are currently in use. For example, power grids and electronic devices consume between 5% and 7% less electricity than AC and can more efficiently deliver power from renewable sources to the grid and energy storage, While improving the stability of the grid; the use of DC can also create more compact electronic devices. Because of the lack of efficient and cost-effective circuit breaker technology in the past, it is not possible to get direct current in the distribution networks of data centers, photovoltaic (solar power) and telecommunications systems, or the internal grid of aviation and transportation, electric vehicles and railroad technologies Other fields to play the biggest effect. Currently, the only electromechanical circuit breaker may generate arc when switching between DC and voltage, and its response is slow, heavy, difficult to use and expensive. The "NEST-DC" research program, funded by the German Ministry of Education and Research (BMBF), aims to develop innovative semiconductors and fully electronic circuit breakers for DC grids and applications. In addition to being able to turn on DC, the new circuit breakers are more important to enable fast and safe shutdown at voltages up to 1,500V. The NEST-DC research program aims to develop innovative semiconductors and fully electronic circuit breakers for DC grids and applications. The NEST-DC research program aims to develop innovative semiconductors and fully electronic circuit breakers for DC grids and applications. In addition, NEST-DC will also develop innovative semiconductor components such as OCB-FETs. It will also target circuit breakers using OCB-FETs, and will introduce new structure and connection technologies and switching extensions Park planning and testing. The research results will be used in the fields of aerospace internal power grids, electric mobility, photovoltaic (solar power generation), and DC distribution networks. NEST-DC Project Member Responsibilities NEST-DC project members span the entire value-creating chain of semiconductor wafer-to-grid systems including the Institute for Motor Drives and Power Electronics and Devices at the University of Bremen in Germany, as well as the Airbus Group, ETA Elektrotechnische Apte Siemens AG and Infineon Technologies AG for planning and coordination. In addition, the European Power Electronics Center (ECPE), headquartered in Neubiberg, Germany, also provides support. In this program, IALB is responsible for investigating and simulating new semiconductor structures used in OCB-FETs, static and dynamic measurements of newly developed circuit breakers, and thermal and collapse limits of test equipment. The Airbus Group is responsible for defining the needs of aeronautical applications, studying the appropriate topologies, and developing application demonstrations with NEST-DC members. Airbus Group will conduct a hardware test in Ottobrunn, Germany. Siemens will focus on the circuit breaker structure and connection technology. ETA Elektrotechnische Apte will define the needs of industrial applications and will work with project members to verify circuit breakers up to 1,500V. Infineon is responsible for leading the program, contributing expertise in power semiconductors and researching power semiconductors for OCB-FETs. The NEST-DC research project is funded by the BMBF for about 2.3 million euros to finance the development of "power electronics that enhance energy efficiency." The plan begins in October 2013 for a period of 3 years. NEST-DC is a German acronym meaning "Innovative DC Circuit Breaker for Renewable Energy and Internal Power Systems." Colored Nylon 6 Yarn,420D Nylon Yarn,High Tenacity 420D Nylon Yarn,Colored 420D Nylon Yarn HAIYANG TECHNOLOGY CO.,LTD , https://www.hypa6.com