Flat coreless motor and flat coreless vibration motor
A flat, coreless technology, applied in the direction of magnetic circuit rotating parts, electrical components, electromechanical devices, etc., can solve problems such as large mechanical loss
Active Publication Date: 2014-09-10
NEW SHICOH MOTOR CO LTD
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Problems solved by technology
[0006] However, when the ring mouth is set along the entire circumferential direction, since the braking torque generating part 62 has an area part of the same degree as the magnetic pole, according to the attraction effect caused by the magnetic force generated between the magnet and the ring mouth, compared with the magnetic force at the ring mouth The mechanical loss of the white spacer and black spacer installed between the rotor and the rotor is a big problem
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[0033] Hereinafter, please refer to the attached drawings for a detailed description of the embodiments of the present invention. Regarding the flat coreless vibration motor 1 in this embodiment, it is a vibration motor mounted on a mobile terminal such as a mobile phone. Such as image 3 As shown, in summary, it is composed of the rotor 3, the rotating shaft 5 of the rotor 3, the stator 7 and the housing 9 in combination.
[0034] The rotor 3 has a bearing 11 capable of rotating freely with respect to the rotating shaft 5 and a frame 13 fixed to the bearing 11. The magnet 15 is fixed to the side surface of the frame 13 on the stator 7 side. The bearing 11 is a cylindrical oil-retaining bearing, and the frame 13 is a circular plate.
[0035] Such as figure 1 As shown, the magnets 15 have N poles and S poles alternately arranged. In this embodiment, 6 poles of magnets are arranged at equal intervals in total (the number of magnetic poles n=6). In addition, figure 1 In order to ...
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A flat coreless motor and a flat coreless vibration motor that prevent the magnetic poles of the magnet from stopping at the dead center and reduce the mechanical loss caused by the attraction of the magnet. The N pole and S pole on the rotor 3 The magnetic poles 15a are arranged in a staggered manner, and the stator 7 is provided with coils 23, annular openings 19 and magnetic detection components 27. The ring mouth 19 has radial belt-like ribs 25a-25b. A space K is formed between adjacent belt-shaped ribs 25a and 25b and between 25a and 25c. The magnetic detection member 27 is provided at a position deviated from the center Q between adjacent belt-shaped ribs 25a and 25b or 25a and 25c. superior. The width W1 of the belt-shaped rib is narrower than the width W3 of the magnetic pole. Among the three belt-shaped ribs 25a to 25c, the interval between the adjacent belt-shaped ribs 25a and 25b is (360 degrees / n) +a degree, and the distance between the other belt-shaped ribs 25a and 25c is (360 degrees / n)-a degree.
Description
Technical field [0001] The present invention relates to a flat coreless motor and a flat coreless vibration motor, which has a rotor with magnetic poles alternately arranged in the circumferential direction and a rotor with coils arranged opposite to the magnetic poles. Background technique [0002] Patent Document 1 (Patent Publication No. JP2004-147468) discloses a flat type vibration motor in which a magnet is arranged on the rotor, the magnetic poles of the magnet are arranged alternately, and the coils arranged opposite to the magnet are arranged on the stator. . [0003] This kind of motor is constructed in which the magnetic detection part is located at the magnetic pole position of the magnet opposite to the coil position. The magnetic detection part detects the magnetism of the rotor magnet and then performs rectification and the coil is energized to drive. . Moreover, if the magnetic detection member is located at the magnetic pole boundary between the magnetic poles, t...
Claims
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IPC IPC(8): H02K29/00H02K1/27
Inventor 白木学小野寺启
Owner NEW SHICOH MOTOR CO LTD