ANALYSIS OF DESIGN AND CHARACTERISTICS OF ELECTRIC SUPERCHARGERS FOR AUTOMOTIVE ENGINES
The analysis of technical decisions and characteristics of superchargers for automotive internal combustion en-gines is carried out. Some variants of axial and centrifugal superchargers with the electric drive are consid-ered. Advantages and disadvantages of each design of a supercharger are noted. Trends of development of su-perchargers with electric drive are analyzed. It is revealed that modern electric superchargers differ not only by characteristics but also by design features. Today there are two directions of compressor wheel drive devel-opment. The first is a high-speed electric drive and the second is increasing rotation speed of wheel by using a planetary multiplier. The second variant of the supercharger performance allows to lower requirements to the electric drive and to reduce unit dimensions, but simultaneously increases unit cost. The cores technical charac-teristics (frequency of rotation, degree of increase of pressure, capacity etc.) of electric superchargers presented in the market are analyzed. On the basis of the analysis the main technical requirements to new design of an electric supercharger are formulated.