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(11) | EP 2 814 148 A8 |
(12) | CORRECTED EUROPEAN PATENT APPLICATION |
published in accordance with Art. 153(4) EPC |
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(54) | LINEAR POWER GENERATOR |
(57) One aspect of the present invention provides a linear power generator in which cogging
is sufficiently constrained. The linear power generator (1) includes a columnar or
cylindrical center yoke (2) made of a soft magnetic material and an outer yoke (3)
made of a soft magnetic material. In the center yoke (2), plural rod-shaped permanent
magnets (10) magnetized in a circumferential direction are arranged in the circumferential
direction in an outer circumference of the center yoke (2) such that opposed magnetic
poles of the permanent magnets (10) adjacent to each other become identical, the permanent
magnets (10) are extended in an axial direction, and the center yoke (2) includes
plural center-side projecting portions (11a) linearly arranged in the circumferential
direction. The cylindrical or columnar outer yoke (3) includes plural winding portions
(25), plural groove portions (22), and an outer-side projecting portion (23a). The
winding portions (25) are arranged in the circumferential direction about a center
axis. The groove portions (22) are arranged at positions opposed to the permanent
magnets (10). The outer-side projecting portion (23a) is arranged while opposed to
the center-side projecting portion (11), the outer-side projecting portion (23a) is
deviated from the center-side projecting portion (11a) by a half pitch, and the groove
portion (22) is pinched by the outer-side projecting portion (23a) in the circumferential
direction.
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