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In 2002, we have installed a 60kw solar power generator at the rooftop of new head office building, which generated about 60,000kwh (CO2 emission reduction of about 25t-CO2) annually.
This paper proposes a coordinated control of rotor side converters (RSCs) and grid side converters (GSCs) of variable speed doubly-fed induction generator (DFIG) based wind generation systems under unbalanced voltage conditions. The control scheme uses stator flux-oriented control for the rotor side converter and grid voltage vector control for the grid side converter. System behaviours and operations of the RSC and GSC under unbalanced voltage are illustrated. The cocoordinated control schemes manage to restore the wind turbines normal operation after the clearance of fault
This paper presents a novel low-cost, highly efficient, reliable and compact motor drive topology for residential and commercial application. The Brushless DC (BLDC) motor is a simple robust machine which has found application over a wide power and speed of ranges in different shapes and geometry. This paper briefly reviews the fundamentals behind the motor and also the different types of BLDC motors with different geometries and then presents a new configuration for BLDC motor/generator, which does not use a permanent magnet in the rotor. A new soft-switching boost converter is proposed in this paper. The conventional boost converter generates switching losses at turn ON and OFF,
1888PressRelease - This is a crowdfunding campaign which aims to assist an orphanage in Togo (West Africa) that is going through a serious housing issue. Our campaign aims to bring hope and stability to the lives of 58 children this holiday season, by building two dormitories and providing a power generator and clean water system. These seemingly simple things would be life changing for these children.
The hydraulic jaw crusher is a very popularly accepted, popular version of crushing stuff and it has been very popular in sectors include things likemetallurgy and mining, structure equipment, transportation and more just as well. The exploration industry is by and large regarded to possess the largest field post. Old jaw bone crushers more often than not consist of a structure, a fixed jaw bone, a movable jaw, toggle dishes as well as changeable seat pieces and which are usually all run by its generator and capable to efforts.
Cloud computing is the apt technology for the decade. It allows user to store large amount of data in cloud storage and use as and when required, from any part of the world, via any terminal equipment. While Cloud services offer flexibility, scalability and economies of scale, there have been commensurate concerns about security. On the similar terms, we have chosen to make use of a combination of authentication technique and key exchange algorithm blended with an encryption algorithm. In this project, we have proposed to make use of 3DES algorithm which is a well-known symmetric cryptosystem and is widely used for secure data transmission, along with that we will blend it with Random Key Generator and Graphical Password to add an extra security measure. This proposed architecture of three way mechanism and the use of symmetric method of encryption make it tough for hackers to crack the security system, thereby protecting data stored in cloud.
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