Abstract: A linear motor includes a plurality of electromagnetic coils continuously arranged and a magnet assembly disposed such that it may travel due to the interaction between itself and the magnetic fluxes from the coils. The coils include U, V, and W phase coils in star connection. The coils of the individual phases are installed in series around a hollow-shaft center core over the travel range of the magnet assembly such that the magnetic pole axis thereof is oriented in the same direction as the axis of the center core. The magnet assembly has an annular shape so that it may surround the coils, and is formed of a plurality of permanent magnets. The magnets are combined in series such that the same magnetic poles oppose each other and the magnetic pole axis is oriented in the same direction as the axis of the center core.

Abstract: A linear motor includes a plurality of electromagnetic coils continuously arranged and a magnet assembly disposed such that it may travel due to the interaction between itself and the magnetic fluxes from the coils. The coils include U, V, and W phase coils in star connection. The coils of the individual phases are installed in series around a hollow-shaft center core over the travel range of the magnet assembly such that the magnetic pole axis thereof is oriented in the same direction as the axis of the center core. The magnet assembly has an annular shape so that it may surround the coils, and is formed of a plurality of permanent magnets. The magnets are combined in series such that the same magnetic poles oppose each other and the magnetic pole axis is oriented in the same direction as the axis of the center core.