Designing for self-excitation of an induction motor involves some computation and a bit of trial and error. Three phase motors are more convenient and easier to operate than single phase motors. Are you only planning to make a theoretical writeup or do you need to design a system?
I had used a 20hp 3 phase induction motor as a generator through capacitive excitation for our 8kW wind turbine generator way back in 1998. Asynchronous generator for microhydro and WTG operates in the same principle. Typical microhydro setup uses a fixed capacitor excitation then regulates its output by using an electronic load control. I suggest you look for websites related to ASYNCHRONOUS GENERATOR // SELF-EXCITATION INDUCTION MOTOR for more info. I don't like the use of induction motors as generators for the following reasons: 1. Synchronous generators are very cheap here in the Philippines, so induction motors have no price advantage; 2. It is very sensitive to reactive loads and has poor voltage regulation; 3. You have to do a bit of guesswork and trial-and-error on proper excitation (2 machines having the same rating but different manufacturers require different excitation); and 4. Has poor startup characteristics for operating motor loads. However, there are certain situations wherein its apparent weakness is actually an advantage, so decision on what type of generator should be used is on a case-to-case basis. Please give more details on what kind of info you really need. It's difficult to give the right kind of info if what you're asking for is not detailed enough. I will not be available for about 2 weeks starting tomorrow since I will be conducting site assessments for feasible microhydro projects. --- In [email protected], "P. Tamil Selvam" <[EMAIL PROTECTED]> wrote: > Dear All, > I am a student of Indian Institute of Technology- Delhi,India. I am doing > my M.Tech project related with *Terminal Impedance Controller for > Self-Excited Induction Generators used in microhydel applications. *So, any > information relating to the state-of-art, practices, challenges, prospects > etc. in that area will be of great value to me. > I request your kind help. > ** > Thanks/Regards > P.TAMILSELVAM > > > [Non-text portions of this message have been removed] ------------------------ Yahoo! Groups Sponsor --------------------~--> Get fast access to your favorite Yahoo! Groups. Make Yahoo! your home page http://us.click.yahoo.com/dpRU5A/wUILAA/yQLSAA/FGYolB/TM --------------------------------------------------------------------~-> Does your company feature in the microhydro business directory at http://microhydropower.net/directory ? If not, please register free of charge and be exposed to the microhydro community world wide! NOTE: The advertisements in this email are added by Yahoogroups who provides us with free email group services. The microhydro-group does not endorse products or support the advertisements in any way. More information on micro hydropower at http://microhydropower.net To unsubscribe: send empty message to [EMAIL PROTECTED] Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/microhydro/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
