ABSTRACT
This chapter deals with the tubular coil-mover linear oscillatory machines (LOM) both for large power and for very small power microphones and vibrators of mobile phones. The Permanent magnets (PM)-mover topology in its tubular shape will be treated in both single- and multiple-pole variants for refrigerator-like compressors. The flat PM-mover LOM in reversal flux configurations with PM flux concentration will be investigated due to its high-performance potential. In an attempt to reduce copper losses and eliminate the electric power flexible cable, the PMs may be placed on the mover but then core weights will be larger. Linear oscillatory generators may produce sustained harmonic motion by the prime mover, even without mechanical springs, by using a centralizing large linear cogging force obtained by expert design. Harmonic distortion is produced by the diaphragm asymmetry, input source voltage harmonics, and uneven magnetic field distribution.
