Synchronous reluctance motor/alternator for flywheel energy storage systems

This paper presents a synchronous reluctance machine design for high-speed high-power applications, such as the motor/alternator for a flywheel energy storage system. The rotor consists of alternating layers of ferromagnetic and nonmagnetic steel that are joined together by a process known as explosion bonding. Analytical expressions for the direct and quadrature inductances of the machine are presented, and are then used to optimize machine design. These expressions compare well with results obtained from finite element analysis. Structural and electrical analyses of a 60 kW, 48000 r.p.m. machine indicate that the design will be appropriate for flywheel systems. Current work involves construction and testing of the above design.

[1]  Ion Boldea,et al.  Permanent Magnet, Reluctance, and Self-Synchronous Motors , 1993 .

[2]  B. Crossland,et al.  Fundamentals, of explosive welding , 1968 .

[3]  J. N. Fawcett,et al.  Design principles for a flywheel energy store for road vehicles , 1995, IAS '95. Conference Record of the 1995 IEEE Industry Applications Conference Thirtieth IAS Annual Meeting.

[4]  Tadashi Fukao,et al.  Test results on a super-high-speed amorphous-iron reluctance motor , 1989 .

[5]  Z. X. Fu,et al.  Performance evaluation of axially-laminated anisotropic (ALA) rotor reluctance synchronous motors , 1992, Conference Record of the 1992 IEEE Industry Applications Society Annual Meeting.

[6]  F. Villata,et al.  On the evolution of AC machines for spindle drive applications , 1989, Conference Record of the IEEE Industry Applications Society Annual Meeting,.

[7]  P. Campbell.  Permanent Magnet Materials and their Application: Applications , 1994 .