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JP5141681B2 |
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JP2013031269A |
To provide a compact and thin claw-pole brushless motor that has a simple configuration and is manufacturable at relatively low cost.A claw-pole brushless motor 1 includes: a pair of stator yokes 30 and 40 that have pole teeth 30a to 30c...
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JP5138491B2 |
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JP5138489B2 |
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JP2013027165A |
To suppress vibration of a stator.In a brushless motor 10, a width of a plurality of teeth 24 becomes gradually wider in a circumferential direction of a motor shaft 12 as it approaches from a base end part 24A side toward a front end pa...
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JP5131304B2 |
To provide a motor of long-life and high reliability by preventing electro-erosion of a bearing with no additional member provided.A motor according to the invention includes an annularly arranged stator 13, a rotor 14 inserted into the ...
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JP5133765B2 |
To provide an embedded magnet type motor capable of highly accurately detecting the rotational position of a rotor with a simple constitution. Receiving holes in a rotor core 15 having P magnetic poles are formed by P/2 pieces of radial ...
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JP2013017391A |
To make the machine length of an electric tool compact by making a DC brushless motor compact in size in the machine length direction and thereby enhancing the operability in the electric tool such as an impact driver employing the DC br...
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JP5128928B2 |
Disclosed herein is a brushless motor that is simply constructed based on a vernier type motor to achieve high torque without the increase in size and complication thereof. The brushless motor includes a rotor having magnetized surfaces ...
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JP5125434B2 |
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JP5128186B2 |
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JP2013013206A |
To provide a technique capable of reducing contact electric resistance between a ground pattern and a caulking portion on a circuit board and making the ground pattern and the caulking portion stably brought into conduction with each oth...
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JP5117825B2 |
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JP2013009573A |
To provide a motor that can prevent noise from entering a sensor fixed to a motor body.A motor 1 comprises: a motor body 50 including a motor housing 10 made of a conductive material and a rotor 40; and an encoder (a sensor) 60, fixed to...
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JP5112321B2 |
A resolver stator (33) is contained in a bottomed cylindrical resolver holder (34). The resolver holder (34) is made of a magnetic material and includes a cylindrical holder part (61) and a bottom wall part (63) which is formed at the en...
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JP5104179B2 |
This motor includes a stator whereupon a plurality of magnetic poles are arranged at first prescribed intervals on the outer circumference section, and a rotor which is rotatively arranged on the outer circumference of the stator by havi...
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JP5105143B2 |
To improve the degree of freedom in a design of a coil without reducing the width of teeth in an armature of a motor. In the armature of the motor, each of slots 2113 of a stator core 211 accommodates the straight line portion of a U-sha...
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JP2012245848A |
To provide an electric power steering device capable of reducing the torque ripple and the radio noise.In an ECU 12, a power board 104 and a capacitor 108 are concentrically disposed relative to an insertion hole 107 of a control board 1...
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JP2012244726A |
To improve efficiency in a high speed drive state.A motor 1 includes: a stator core 11 that has a plurality of slots 112 formed along a circumferential direction thereof; first coils 121 that are provided on respective slots 112 of the s...
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JP5092412B2 |
A resolver includes a terminal block having a plurality of terminals integrally formed therein. Each of the terminals has a conductive wire connecting portion arranged to allow a conductive wire of a resolver stator to be fixed thereto a...
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JP5091293B2 |
To provide a power steering device simplified in structure by adjacently providing a control system board and a rotational position sensor. The power steering device includes: a worm gear comprising a worm shaft 6 and a worm wheel 5 enga...
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JP5092844B2 |
To provide a high-reliability electric tool that modifies the balancing amount of a rotor for a brushless motor without generating any splash of an adhesive material and without producing defective pieces caused due to the balancing amou...
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JP5083291B2 |
A technique effectively using the magnetic flux of a permanent magnet, contributing to a cost reduction. Permanent magnets (14a, 14b) are arranged away from a magnetic barrier (19). Between the permanent magnets (14a, 14b) and the magnet...
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JP2012231648A |
To provide a motor, having a rotation detector, that omits part of components of the rotation detector so as to reduce the number of the components in the overall configuration, and man-hours, of the motor.A motor 1 with a rotation detec...
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JP5076311B2 |
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JP5077369B2 |
To improve the output torque of a brushless motor used as a driving source of an apparatus. A brushless motor includes a rotor having a magnet 1 magnetized alternately with an N pole and an S pole in a rotational direction; and a core ha...
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JP5081005B2 |
A centerpiece rotatably supports a rotatable shaft therein. A stator core is placed radially outward of the centerpiece. A generally cylindrical vibration isolator is made of a resilient material and is radially placed between the center...
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JP2012228014A |
To reduce armature reaction in a motor using a segment magnet, and to reduce a torque sag and a torque ripple in a heavy load region.A motor 1 for EPS is a brushless motor using a segment magnet 16 with a cross section formed in a D type...
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JP2012217325A |
To provide a motor which can sufficiently adopt a sensorless driving method.The motor M includes: a stator 10 of 12 slots, in which 12 teeth 11a extending in a radial inside are arranged in a circumferential direction and windings 12 are...
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JP5064992B2 |
A second ball bearing is installed from a first axial side toward a second axial side into an interior of a bearing holder of a rotor through an opening of the bearing holder, so that an outer race of the second ball bearing is press fit...
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JP5064401B2 |
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JP5064215B2 |
Brushless motor (1) which is an electric motor, is provided with a stator unit (3) inserted in and engaged with case (2). A part of the coating material (21) for coating the coil (17) of the stator unit (3) enters the receiving part (13)...
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JP5064005B2 |
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JP5063956B2 |
To provide a motor that is of small size and yet produces significant power by enhancing winding efficiency. The motor 1 includes a coil unit 22 fixed and supported on a stator holder 12. The coil unit 22 is so constructed that multiple ...
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JP2012210045A |
To provide a DC motor which exhibits excellent cost-effectiveness by reducing or suppressing the cogging torque without causing a significant cost increase.Predetermined number of rising pieces 45 are provided integrally on a bearing bra...
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JP5059021B2 |
A brushless motor (1) is provided with a magnet holding section (52) for holding/fixing a magnet, and a magnet holder (51) having a resolver rotor connecting section (54) connected to a resolver rotor (35). The resolver rotor connecting ...
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JP5058339B2 |
A motor positioning structure is constructed by providing a plurality of positioning pins 28, 29 for positioning a circuit board 22 on a case 21 of a circuit main body 3 and also providing receiving holes 35, 36 for receiving the positio...
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JP5055886B2 |
A motor used for a data storage disk drive is provided. The motor includes a rotor holder having a cylindrical portion. The cylindrical portion has a radially inner surface defining a through hole and an inner protruding section arranged...
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JP2012205355A |
To detect a rotational position with high accuracy while preventing radial dimension restriction and deterioration in torque performance of a rotor.A motor including: a stator for generating a rotating magnetic field by electrical conduc...
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JP5050403B2 |
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JP5044637B2 |
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JP5037827B2 |
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JP5040220B2 |
A motor stator includes a stator core stack having a core back and a plurality of teeth extending from the core back in a radial direction of the core back. The motor stator also includes winding wires wound around the teeth and having n...
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JP5042246B2 |
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JP2012186879A |
To downsize and simplify a brushless motor.A brushless motor 1 has: a rotation shaft 2; a rotor 3 fixed to the rotation shaft 2; a rotor magnet 4 held by the rotor 3; a stator coil 7 arranged between the rotation shaft 2 and the rotor ma...
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JP5037257B2 |
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JP5037256B2 |
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JP5034072B2 |
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JP5035669B2 |
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JP5028869B2 |
A motor includes a stator including a core back having a circular or substantially circular shape, a plurality of tooth portions extending radially inwardly from the core back, a plurality of insulators covering the tooth portions, a plu...
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