Electric apparatus with moving magnetic field generating apparatus

摘要

A moving magnetic field generating apparatus includes a magnet array including magnets disposed at a first pitch such that N and S poles of adjacent magnets in the magnet array are alternated, and first and second magnetic pole piece arrays extending along the magnet array to interpose the magnet array therebetween with a gap from the magnet array. The first and second magnetic pole piece arrays are disposed with a predetermined phase difference therebetween. The first magnetic pole piece array includes first magnetic pole pieces disposed at a second pitch in an array and each having a length enough to face at least two adjacent magnets in the magnet array. The second magnetic pole piece array is configured similarly to the first magnetic pole piece array. One of the first and second magnetic pole piece arrays and the magnet array is relatively moved to the other at a predetermined speed.

主权项

1. An electric apparatus comprising a moving magnetic field generating apparatus and a magnetic pole array including a plurality of coils disposed at a predetermined pitch to form a plurality of magnetic poles,
the moving magnetic field generating apparatus including:
a magnet array including a plurality of magnets disposed at a first pitch such that N and S poles of adjacent magnets in the magnet array are alternated; andfirst and second magnetic pole piece arrays extending along the magnet array to interpose the magnet array therebetween with a gap from the magnet array, the first and second magnetic pole piece arrays being rotationally offset relative to one another so as to have a predetermined phase difference between each other,the first magnetic pole piece array including a plurality of first magnetic pole pieces disposed at a second pitch in an array and each having a length enough to face at least two adjacent magnets in the magnet array,the second magnetic pole piece array including a plurality of second magnetic pole pieces disposed at the second pitch in an array and each having a length enough to face at least two adjacent magnets in the magnet array, wherein: the first and second pitches and the phase difference are set such that, when one of the first and second magnetic pole piece arrays and the magnet array makes a relative movement with respect to the other at a predetermined relative moving speed, magnetic flux emanating from n consecutive magnets in the magnet array, where n is a natural number, forms synthesized magnetic flux that sequentially passes through the first magnetic pole pieces in the first magnetic pole piece array facing the n magnets and the second magnetic pole pieces in the second magnetic pole piece array facing the n magnets, thereby forming a high-speed moving magnetic field that moves at a speed faster than the predetermined relative moving speed; and the coils in the magnetic pole array are disposed to face at least one of the first and second magnetic pole piece arrays of the moving magnetic field generating apparatus.