The Principle Of Frequency Inversion

Induction motor fed by ac current, typically three-phase. Three-phase system of windings creates a rotating magnetic field with an angular velocity of rotation: (1) where f – frequency of the mains, pn – number of pole pairs. Rotating magnetic field crosses the winding turns of the rotor. If the rate of rotation of the rotor …

Brazil Band

According to Jose Antonio Pear tree, in its dissertao on Band of Music in Brazil it says: In Brazil, the term music band is used, but important variations as filarmnica and corporation had been evidenced. Italian, Spanish editions Portuguese enhance the social aspects of the band: the activities of entertainment and musical education and its …

Maintenance Costs

How was controlled the progress of the program? Which were the real costs of implementing it? The oil monitoring and analyses and lubrication, were integrated with other technical outposts of mantencin? Who and in what intensity they were trained for the program? Which was the reaction of those affected by the changes that the program …

Windows PVC Window

All modern advances designed to improve the lives of civilization, man, make it easier in everyday terms. Moreover, they are designed for comfort and safety of the most precious thing a man – his life and health. Considerable role to play modern windows. Branded PVC window profile are designed so that the possibility of penetration …