Magnetic flux control device
First Claim
1. A magnetic flux control device comprising:
- a pole piece assembly which is provided with an N pole piece which is formed with a first surface and a second surface and made of a ferromagnetic material, an S pole piece which is formed with a first surface and a second surface and made of a ferromagnetic material, and a permanent magnet which is disposed such that an N-pole is in contact with the N pole piece and an S-pole is in contact with the S pole piece;
a first outer pole piece which is formed with a first surface and a second surface and made of a magnetic material;
a second outer pole piece which is formed with a first surface and a second surface and made of a magnetic material;
a base pole piece which is formed with a first surface and a second surface and made of a magnetic material;
a coil which is wound around at least one of the N pole piece, the S pole piece, the first outer pole piece, the second outer pole piece, and the base pole piece; and
a control unit which controls electric current to be applied to the coil,wherein the first surface of the N pole piece faces the first surface of the base pole piece, the first surface of the S pole piece faces the second surface of the base pole piece, the second surface of the N pole piece faces the first surface of the first outer pole piece, the second surface of the S pole piece faces the first surface of the second outer pole piece,the pole piece assembly is movable between a first position where the first surface and the second surface of the base pole piece are magnetically spaced apart from the first surface of the N pole piece and the first surface of the S pole piece, respectively, and the second surface of the N pole piece and the second surface of the S pole piece are magnetically in contact with the first surface of the first outer pole piece and the first surface of the second outer pole piece, respectively, and a second position where the first surface and the second surface of the base pole piece are magnetically in contact with the first surface of the N pole piece and the first surface of the S pole piece, respectively, and the second surface of the N pole piece and the second surface of the S pole piece are magnetically spaced apart from the first surface of the first outer pole piece and the first surface of the second outer pole piece, respectively,and the control unit controls electric current to be applied to the coil so as to move the pole piece assembly between the first position and the second position, and thus to change magnetic flux at the second surface of the first outer pole piece and the second surface of the second outer pole piece.
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Accused Products
Abstract
A magnetic flux control device according to the exemplary embodiment includes: a pole piece assembly which is provided with an N pole piece and an S pole piece which are formed with first surfaces and second surfaces and made of a ferromagnetic material, and a permanent magnet which is disposed such that an N-pole is in contact with the N pole piece and an S-pole is in contact with the S pole piece; a first outer pole piece, a second outer pole piece, and a base pole piece which are formed with first surfaces and second surfaces and made of a ferromagnetic material; a coil which is wound around at least one of the N pole piece, the S pole piece, the first outer pole piece, the second outer pole piece, and the base pole piece; and a control unit which controls electric current to be applied to the coil.
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Citations
35 Claims
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1. A magnetic flux control device comprising:
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a pole piece assembly which is provided with an N pole piece which is formed with a first surface and a second surface and made of a ferromagnetic material, an S pole piece which is formed with a first surface and a second surface and made of a ferromagnetic material, and a permanent magnet which is disposed such that an N-pole is in contact with the N pole piece and an S-pole is in contact with the S pole piece; a first outer pole piece which is formed with a first surface and a second surface and made of a magnetic material; a second outer pole piece which is formed with a first surface and a second surface and made of a magnetic material; a base pole piece which is formed with a first surface and a second surface and made of a magnetic material; a coil which is wound around at least one of the N pole piece, the S pole piece, the first outer pole piece, the second outer pole piece, and the base pole piece; and a control unit which controls electric current to be applied to the coil, wherein the first surface of the N pole piece faces the first surface of the base pole piece, the first surface of the S pole piece faces the second surface of the base pole piece, the second surface of the N pole piece faces the first surface of the first outer pole piece, the second surface of the S pole piece faces the first surface of the second outer pole piece, the pole piece assembly is movable between a first position where the first surface and the second surface of the base pole piece are magnetically spaced apart from the first surface of the N pole piece and the first surface of the S pole piece, respectively, and the second surface of the N pole piece and the second surface of the S pole piece are magnetically in contact with the first surface of the first outer pole piece and the first surface of the second outer pole piece, respectively, and a second position where the first surface and the second surface of the base pole piece are magnetically in contact with the first surface of the N pole piece and the first surface of the S pole piece, respectively, and the second surface of the N pole piece and the second surface of the S pole piece are magnetically spaced apart from the first surface of the first outer pole piece and the first surface of the second outer pole piece, respectively, and the control unit controls electric current to be applied to the coil so as to move the pole piece assembly between the first position and the second position, and thus to change magnetic flux at the second surface of the first outer pole piece and the second surface of the second outer pole piece. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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Specification