| 摘要 |
In order to provide a good linear motor device which can enjoy low cost and high driving power but has small thrust ripples, in a linear motor in which permanent magnets move relative to a coil, a plurality of permanent magnets are arranged along the moving direction while rotating their polarity directions 90 DEG each in turn to generate a sine magnetic field. Each permanent magnet has a simple rectangular parallelopiped shape, and two or more coils of a polyphase coil are simultaneously energized.
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