Abstract: Provided is a motor including a stator and a rotor. The rotor includes a rotor core rotating integrally with an rotation shaft and having a core base end part fixed to the rotation shaft and core protrusions protruding outward in a radial direction from the core base end part; and a magnet disposed between the core protrusions adjacent to each other in a circumferential direction on an outer peripheral surface of the core base end part. A central position of the stator core in the axial direction, a central position of the rotor core in the axial direction, and a central position of the magnet in the axial direction are deviated from each other. The central position of the magnet in the axial direction is located between the central position of the stator core in the axial direction and the central position of the rotor core in the axial direction.

Abstract: Provided are a motor with which dynamic unbalance of a rotor can be suppressed, and a deterioration in the motor characteristics can be reduced, and a method for manufacturing said motor. In a motor unit: a rotor central position, a magnet central position, and a stator central position are offset from one another; a length L1 between inner wall surfaces, facing one another in an axial direction, of magnet holders, an axial direction magnet length L2 of magnets, and an offset length L3 satisfy L1?L2<L3; and first and second holder lengths Lh are the same.

Abstract: A rotary actuator includes a motor, an output shaft, and a speed reducer. The motor includes a motor shaft rotating about an axial direction. The output shaft is disposed in parallel with the motor shaft. The speed reducer reduces a rotational speed of the motor and transmits rotation of the motor at a reduced rotational speed to the output shaft. The speed reducer includes a parallel-shaft type reducer that has a drive gear on the motor shaft and a driven gear on the output shaft. One side and the other side in the axial direction are defined as a first side and a second side, respectively. The motor is located on the first side of the speed reducer in the axial direction. The driven gear includes a teeth portion having a gear end surface on the first side of the teeth portion. The motor includes a stator having a stator end surface on the second side of the stator. The gear end surface is located on the first side of the stator end surface in the axial direction.

Abstract: A rotor of an axial flux motor reduces a cogging torque and torque ripple, and is disposed facing a stator. The rotor includes: a rotation shaft; a rotor core having the rotation shaft connected thereto by passing through a center the rotor core; a plurality of seating grooves concavely formed on one surface of the rotor core facing the stator while being spaced apart from each other at equal intervals along a circumferential direction of the rotor core; and a plurality of protrusions formed on inner wall surface of each of the plurality of seating grooves such that the plurality protrusions face a center of each of the plurality of seating grooves; and a plurality of magnets pressed into and coupled to an associated one of the plurality of seating grooves while plastically deforming the plurality of protrusions of the rotor core.

Abstract: A material for laminated iron cores is used as plural steel sheets to be overlapped with one another and punched when a laminated iron core is manufactured. A surface roughness of the steel sheets forming the material for laminated iron cores is at an arithmetic mean roughness Ra of 0.40 [?m] or less, and a sheet thickness deviation in a sheet width direction of at least a portion used as the laminated iron core is 3 [?m] or less per 500 [mm], the portion being of the steel sheets forming the material for laminated iron cores.

Abstract: A brushless motor includes a stator assembly including a generally-cylindrical stator body having a center bore, teeth extending from the stator body towards the center bore and defining slots in between, and windings wound around the teeth; and a rotor assembly rotatably received within the center bore and includes a rotor shaft and a generally-cylindrical rotor body. The motor further includes at least one rotor bearing mounted on the rotor shaft, and at least one bearing support member supporting the rotor bearing. The bearing support member includes a radial body forming a bearing pocket for receiving the rotor bearing therein, and axial post inserts received within the slots of the stator assembly between adjacent sets of windings and in contact with an inner curved surface of the stator body to support the rotor bearing with respect to the stator assembly along a center axis of the center bore.

Abstract: A linear stepper motor with an actuating rod in a housing with a stator, a rotor and a replaceable bearing shield fixed on the stator is provided. The rotor includes a threaded shaft. The bearing shield defines two guide cut-outs. The actuating rod includes a spindle nut portion engaged with the threaded shaft, a replaceable coupling shank for a customer-specific actuating element, and two opposing parallel fork legs which link the spindle nut portion and the coupling shank and which are guided in a rotation-locked manner through the two guide cut-outs.

Abstract: A motor module includes a stator formed of a main plate of a first thickness on which is mounted a rotor The stator has at each end a receiving zone, the thickness of which is less than the first thickness.

Abstract: An electrical circuit for supplying electrical propulsion power on board a motor vehicle is disclosed. The electrical power is obtained from power delivered to the electrical circuit by a battery of the vehicle and converted by at least two cells. The circuit includes inductive elements connected to transistors for managing the current flowing in the inductive elements, and the inductive elements are coupled to form a magnetic circuit. The magnetic circuit is alternatively controlled according to a common mode in which an apparent inductance of the said magnetic circuit is of the order of magnitude of the sum of the inductances specific to each inductive element, or according to a differential mode in which the apparent inductance of the said magnetic circuit is of the order of magnitude of the leakage inductance of the coupling between the said coupled inductive elements.

Abstract: A stepping motor includes a housing, a stator assembly, a rotor, and a sensor portion. The stator assembly is disposed inside the housing. The rotor is rotatably disposed inside the stator assembly and includes a rotation shaft, and opposite ends of the rotation shaft are supported by the housing. The sensor portion is disposed inside the housing and detects a magnetic field of the rotor.

Abstract: A stepper motor is provided in which a permanent ring magnet is sandwiched in an outer part of the stator winding assembly located far from the gap between rotor and stator teeth, so that magnetic flux in the gap is dominated by the Ampere-turns of energized stator coils and therefore more easily controlled for reduced vibration at low stepping speeds. The rotor need not contain any permanent disk magnet. If one is provided, it can be completely embedded within the rotor and merely supplement the primary flux from the stator to enhance torque. In most cases, where the rotor lacks any permanent magnet, the motor's axial shaft can have a larger diameter and may, together with the rotor, form a linear actuator.

Abstract: A rotary electric machine includes a stator in which windings are arranged around a plurality of main poles of a stator core, and a hybrid type rotor arranged with an air gap between the stator and the rotor has a step angle for the rotor of about 4.09° and uses metal bearings for supporting a rotor shaft of the rotor. Setting of the step angle for the rotor to be about 4.09° can make a rotation angle of the rotor caused by excitation of the windings by an input pulse signal larger as compared with a typical motor having a step angle of about 1.8°. With this unique arrangement, the rotor can be rotated at higher speeds, increasing the motor efficiency. Therefore, the motor output at approximately the same level as that of a conventional motor can be obtained without keeping the air gap high precision. Due to this, even if inexpensive slide bearings, i.e.

Abstract: An actuating device for a heating element valve has a drive motor with a motor shaft, an actuator, and a rotation-linear conversion drive. The conversion drive is coupled on the drive side to the motor shaft and on the output side to the actuator and converts a rotational movement of the motor shaft into a linear movement of the actuator. The rotation-linear conversion drive further has a cam disc on the output side which is provided on its outer circumferential periphery with a plurality of step segments each having a substantially constant distance from the axis of the cam disc. The step segments are connected via connecting segments with a variable axle spacing.

Abstract: Provided is a bending test apparatus for flexible substrate which may increase or maximize reliability. The bending test apparatus includes a table, a first electrode part fixing one side of a flexible substrate on the table, a guide rail disposed adjacent to the first electrode part, the guide rail extending from the one side of the flexible substrate to the other side, a slider moved along the guide rail, and a second electrode part connected to the slider, the second electrode part approaching or spacing the other side of the flexible substrate to/from the first electrode part.

Abstract: A stator core includes a cylindrical yoke and teeth that are disposed in an inner circumference surface of the yoke along its circumferential direction and that are subjected to magnetic flux from the rotor of the rotating electrical device. The teeth include a trapezoidal tooth that has a trapezoidal cross section that is taken vertically along a central axis of the yoke and an oddly shaped tooth of which a tip section has the same shape as the trapezoidal tooth and a base section from the tip section to the yoke has a different shape from the trapezoidal tooth.

Abstract: A stepping motor includes a first plate; a second plate having a side facing the first plate and a reverse side; a stator held by the first plate and the second plate axially; plural band connecting portions equipped in the first plate, disposed at a side surface of the stator, extending toward the second plate and having an engaging portion at an outer side thereof; and a band portion contacting the reverse side of the second plate, extending toward the first plate and having plural arm portions engaging respective engaging portions of the band connecting portion. The band portion is connected to the first plate while holding the second plate and the stator therebetween by engaging the plural arms with the engaging portions, the band portion is elastically deformed, the deformation causes tensile force in which the arm portions pull the band connecting portions toward the band portion.

Abstract: The invention relates to an electric motor having at least two stators disposed coaxially to each other and a rotor, wherein each stator has 2*n poles, with n=1, 2, 3, . . . , wherein each stator has at least one common coil or winding for all poles, wherein each stator has a first and second partial shell, wherein each partial shell has a shell bottom and n poles, wherein each pole is formed as a tooth extending in axial direction or substantially in axial direction and beginning on the shell bottom, wherein with assembled partial shells of a stator the tooth or the teeth of the first partial shell is or are disposed in alternating manner in circumferential direction with the tooth or the teeth of the second partial shell, and wherein with assembled partial shells or a stator, the at least one coil) or winding is received between the partial shells.

Abstract: A motor may include a motor main body and an urging member. The urging member is provided with an end plate part having a plate spring part for urging the rotor and an engaging plate part which is extended along an outer peripheral face of a tube-like body part structuring an outer peripheral face of the motor main body. The engaging plate part is provided with a side plate part extended from the end plate part along the outer peripheral face of tube-like body part, a hook part which is bent from a tip end part of the side plate part to an inner side and is engaged with an opening part which is formed in the tube-like body part, and a pawl part which is bent from a tip end part of the hook part and is engaged with an inner peripheral face of the tube-like body part.

Abstract: A small electric motor is disclosed, such as a claw pole motor. An exemplary small electric motor includes a housing, a stator having at least two stator windings, a rotor having a rotational axis, and a flexible conductor foil for the electrical connection of the stator windings. The conductor foil includes winding connection contacts, external connection contacts and conductor paths between the winding connection contacts and the external connection contacts. Taps of the stator windings are electrically contacted with the winding connection contacts of the conductor foil. The conductor foil can be configured as an elongated strip having at least two connection portions which are arranged in spaced-apart relationship with each other and include winding connection contacts.

Abstract: A linear actuating device includes a track unit having an insulating sleeve made of non-metallic material and surrounding an axis, a plurality of coils mounted spacedly and sleevingly on the insulating sleeve along the axis, and a shell containing the insulating sleeve and the coils. The linear actuating device also includes a forcer unit having an elongate member extending through the insulating sleeve, having a segment configured for connecting to a vehicle shaft, and being movable along the axis relative to the insulating sleeve. The forcer unit also includes a plurality of magnets mounted spacedly relative to the axis and sleevingly on the elongate member.

Abstract: A rotary construction laser is disclosed. The rotary construction laser having a deflection device rotatably mounted around an axis of rotation for emitting laser light as well as a stepper motor for rotating the deflection device around the axis of rotation.

Abstract: Disclosed is a stepping motor in which the rim of a substrate and the lower surface of the substrate directed toward the outside of a bracket are arranged inside of the bracket to prevent the rim and lower surface of the substrate from projecting outwardly. Accordingly, the substrate is prevented from colliding against an object during a falling impact test, thus preventing damage to the substrate and improving the durability and reliability of the stepping motor. Further, the substrate gets caught by a hook of the bracket when the substrate is pressed toward the bracket when the substrate is located at a predetermined point of the bracket. This leads to a simplified assembly process and improved productivity.

Abstract: Disclosed herein is a step motor, including a lead screw, a rotor fixed to an outer surface of the lead screw, a fixture containing a stator disposed to face the rotor and a housing whose one side end part is open to insert the stator and wrap the stator, and a bracket having a bracket body of a plate shape on which the housing is disposed and a bending part bent towards the one side end part of the housing from the bracket body.

Abstract: A motor includes a stator having boss portions on an end plate thereof, a front plate provided on an upper surface of the stator, and a band connecting the stator and the front plate. Recess portions are formed adjacent to an outer peripheral edge of the front plate, and a protruding portion is provided in each recess portion. The band has a bottom plate part and attachment parts. The bottom plate part includes notched portions. Each attachment part includes an engagement portion at a tip end thereof which includes a notched portion. The notched portions of the bottom plate part are fitted with the boss portions of the end plate, and the notched portions of the engagement portions are fitted with the protruding portions of the front plate to form engagement hooks at most tip ends of the engagement portions, respectively, thereby connecting the stator and the front plate.

Abstract: Disclosed herein is a stepping motor. The stepping motor include a bracket including a fixing hole; a shaft supporter rotatably supporting one end of a shaft and fitted into the fixing hole; and a pressure supporter pressing and supporting the fixing hole and the shaft supporter while forming a plurality of pressure support points between the fixing hole and the shaft supporter. As such, the plurality of pressure support points is formed between the shaft supporter and the fixing hole, thereby enabling the shaft supporter to be stably press-fitted into and fixed to the fixing hole of the bracket.

Abstract: A retrofit kit for a printing press adjustment hydraulic actuator. The hydraulic actuator is maintained to benefit from its mounting position and alignment, but the hydraulic fluid is removed. A hydraulic actuator shaft is attached to a mechanism that converts the rotary motion of an electric motor to linear motion. The electric motor provides faster and more accurate control of the hydraulic actuator shaft than the hydraulic fluid, providing for faster adjustment of the printing press.

Abstract: A motor capable of performing mechanical position adjustment of a magnetic detection unit to thereby adjust a phase difference between signals output from respective two magnetosensitive pole pieces. A rotor includes a magnet having an axial end surface magnetized to have circumferentially alternately different poles. A stator has two outer magnetic pole portions opposed to an outer peripheral surface of the magnet. Two coils are energized to excite the outer magnetic pole portions. A magnetic sensor is opposed to an axial end surface of the magnet. The magnetosensitive pole pieces of the magnetic sensor detect a magnetic field change caused by rotation of the magnet. The magnetosensitive pole pieces are arranged side by side in a direction orthogonal to a diametrical direction of the magnet. The position of the magnetic sensor can be adjusted in the diametrical direction of the magnet.

Abstract: A stepping motor includes: a cylindrical rotor assembly disposed around the rotation axis; a stator assembly including two stator units disposed around the rotor assembly and axially coupled to each other; and a terminal structure disposed at the axial center of the outer circumference of the stator assembly. The terminal structure includes: a terminal block cluster composed of four terminal blocks; and four terminals fixed respectively to the four terminal blocks. The four terminals each include: an internal connection portion to which one of two wire ends of the winding is connected; and an external connection portion which is disposed substantially parallel to the internal connection portion and which is connected to a driving circuit disposed externally. The four terminals are arranged in a line along a direction substantially orthogonal to the rotation axis, and the internal connection portion and the external connection portion are aligned along the rotation axis.

Abstract: Actuation systems and lithographic apparatus which address the issue of uncontrolled return of common mode currents are provided. In a main an embodiment such systems aim to prevent the occurrence of corona and discharge between high voltage electric cables in low pressure environments. An exemplary actuation system comprises an actuator module, a power source and power transmission cables. The actuator module includes an electrical motor and a first plurality of shielded cables configured to connect to the electrical motor at one end. The actuator module is located in a low pressure environment and each shield of the first plurality of cables is grounded. The transmission cables electrically connect the first plurality of cables with power supply, and comprise an extra cable which is configured to connect each shield of the first plurality of cables with the first extra cable, via a choke so as to provide a return path for common-mode currents.

Abstract: The present invention relates to a stepping motor with a magnet pole pattern having a predetermined pattern around the circumference of the stepping motor. In one embodiment, the pattern relates to a code having a unique single maximum autocorrelation peak over the period of the code. Example codes include Barker codes, PN codes, Kasami codes, Golomb ruler codes, and other codes. In one embodiment, the rotor and stator have a matching pole pattern. In one embodiment, the drive is arranged to align the poles in an inline configuration, alternatively, the drive may be arranged to align the poles in a diagonal configuration. In a further embodiment, one or more sets of poles are provided on the stator, each set being offset rotationally by a partial pole spacing. In one embodiment, the rotor is initially synchronized with the stator by capturing the rotor using a single unambiguous lock-in position based on the code autocorrelation.

Abstract: The present invention relates to a linear stepping motor, the motor characterized by: a housing; a stator mounted inside the housing: a rotor rotatively arranged at an inner surface of the stator and mounted with a female screw threaded to a lead screw; a mounting plate fixed at a lateral surface of the housing for passing the lead screw; and a plate cover coupled between the mounting plate and the housing configured to prevent a bearing rotatively supporting the female screw from axially moving, such that the bearing can be securely fixed in a simple structure by the plate cover itself to allow a free design in the size of a central hole of the housing or the size of an outer diameter of a magnet regardless of the size of outer diameter of the bearing, and the bearing is securely fixed to the plate cover by caulking to prevent the bearing from moving axially, whereby vibration and noise can be remarkably reduced to enhance the reliability of the product.

Abstract: The present invention relates to a stepping motor with a magnet pole pattern having a predetermined pattern around the circumference of the stepping motor. In one embodiment, the pattern relates to a code having a unique single maximum autocorrelation peak over the period of the code. Example codes include Barker codes, PN codes, Kasami codes, Golomb ruler codes, and other codes. In one embodiment, the rotor and stator have a matching pole pattern. In one embodiment, the drive is arranged to align the poles in an inline configuration, alternatively, the drive may be arranged to align the poles in a diagonal configuration. In a further embodiment, one or more sets of poles are provided on the stator, each set being offset rotationally by a partial pole spacing.

Abstract: A motor may include a rotor having a rotation shaft, a stator disposed on an outer peripheral side of the rotor, a frame fixed to the stator, and an urging member made of metal for urging an end part on an output side of the rotation shaft to an opposite-to-output side. The frame includes a bottom face part, a stator fixing part which is formed to be bent from the bottom face part and which is fixed to the stator, and a shaft support part which is formed to be bent from the bottom face part so as to face the stator fixing part and which supports the end part on the output side of the rotation shaft, and the urging member is fixed by welding to an output side face which is a face on an output side of the shaft support part. The urging member is preferably a flat spring.

Abstract: A motor may include a rotor having a rotation shaft, a stator disposed on an outer peripheral side of the rotor, an output side bearing which supports an end part on an output side of the rotation shaft in a radial direction and an axial direction, a frame which is provided with a bearing holding part for holding the output side bearing and which is fixed to the stator, and an urging member which is attached to the bearing holding part for urging the output side bearing to an opposite-to-output side. The bearing holding part is formed with a bearing hole which penetrates through the bearing holding part and on which the output side bearing is disposed, and the output side bearing is disposed on the bearing hole in a movable state in the axial direction of the rotation shaft.

Abstract: In a small diameter stepping motor including two stator units each including a bobbin formed of an insulating material, each bobbin includes: a circular hollow cylinder portion having a winding; two flanges disposed respectively at the both ends of the cylinder portion; and a terminal structure disposed at one of the two flanges and including two terminal blocks and a pair of electrical contact members at which the lead-out lines of the winding are terminated, wherein the two terminal blocks are circumferentially shifted in position from each other with respect to the cylinder portion axis extend axially outwardly, and the terminal blocks of one bobbin intermesh with the terminal blocks of the other bobbin such that the terminal blocks of the one bobbin overhang a part of the winding wound on the other bobbin and vice versa when the two stator units are coupled to each other.

Abstract: The permanently excited synchronous machine (1) includes a rotor (3) and a stand (2) which contains a three-branched winding system (8) which comprises tooth coils. The stand (2) has a total of three or six grooves (5) and a tooth (6, 7) is formed there between. A total of three tooth coils (9) are arranged in the grooves (5) and each coil is associated with one of the three winding phases. The number of user pole pairs (pN) is four or five. The rotor (3) has twice as many user pole pairs (pN) of permanent magnets (18) which are evenly distributed on the periphery.

Abstract: A magnet rotor includes a drive arm with a rotary shaft, and an anisotropic permanent magnet having an axis of magnetization. The drive arm is composed of a light transmitting resin. The magnet has a cylindrical shape with a hollow center portion through which the rotary shaft is disposed. The drive arm and the permanent magnet are bonded together by a light curable resin adhesive.

Abstract: A stepping motor includes: a cylindrical rotor assembly disposed around the rotation axis; a stator assembly including two stator units disposed around the rotor assembly and axially coupled to each other; and a terminal structure disposed at the axial center of the outer circumference of the stator assembly. The terminal structure includes: a terminal block cluster composed of four terminal blocks; and four terminals fixed respectively to the four terminal blocks. The four terminals each include: an internal connection portion to which one of two wire ends of the winding is connected; and an external connection portion which is disposed substantially parallel to the internal connection portion and which is connected to a driving circuit disposed externally. The four terminals are arranged in a line along a direction substantially orthogonal to the rotation axis, and the internal connection portion and the external connection portion are aligned along the rotation axis.

Abstract: Disclosed herein is a step motor, including a lead screw, a rotor fixed to an outer surface of the lead screw, a fixture containing a stator disposed to face the rotor and a housing whose one side end part is open to insert the stator and wrap the stator, and a bracket having a bracket body of a plate shape on which the housing is disposed and a bending part bent towards the one side end part of the housing from the bracket body.

Abstract: A stepping motor may include a rotor having a rotation shaft and a permanent magnet, a stator provided with a stator core formed with a flange part and pole teeth, a drive coil and a terminal block disposed on an outer peripheral side of the stator. The flange part of the stator core may be provided with a terminal block holding part and the terminal block holding part is formed with a first holding part, which is formed to be bent from the flange part and extended in an axial direction of a motor, for supporting a bottom face of the terminal block. Further, a plurality of terminal pins may be arranged in the terminal block so that a plurality of the terminal pins is disposed in the terminal block along an axial direction of the rotation shaft.

Abstract: A motor is provided, which includes: a rotor having rotor pole groups, in which N-poles and S-poles are alternately arranged in the circumferential direction; an N number (N is a positive integer) of stator pole groups, in which a plurality of stator poles are arranged for individual phases along or in the vicinity of the respective circumferences so as to be positioned at substantially the same rotational phase position in terms of electrical angle; and an (N?1) number of loop windings axially arranged between the stator pole groups, with the same phase being arranged at axial ends, wherein each of the loop windings is arranged radially inner than the outer diameter of each rotor pole group. This simplified winding structure can enhance productivity, reduce size, enhance efficiency and reduce cost.

Abstract: An air-core stepping motor includes: a tubular stator including a yoke and a coil; a tubular rotor including a cylindrical magnet; and rotor support means for supporting the rotor rotatably with respect to the stator, the rotor support means including a sleeve fixed to the rotor, a holder fixed to the stator, and a ball held between the sleeve and the holder, the holder having a first holder member and a second holder member separated in a rotational-axial direction of the motor, the first holder member and the second holder member being assembled with the first holder member or the second holder member fitted to the sleeve, and being used thereafter with the first holder member or the second holder member disconnected from the sleeve.

Abstract: The permanent magnet type rotary machine is capable of reducing cogging torque caused by variation of amounts of magnetic flux in magnetic circuits. The permanent magnet type rotary machine comprises: a stator constituted by stator units, which are coaxially stacked and in each of which a coil is sandwiched between stator yokes; and a rotor including a permanent magnet having magnetic poles, which respectively face magnetic pole teeth of the stator yokes, the rotor being rotatably supported by an output shaft. The stator units in one phase is divided into n (n is an integer one or more), and magnetic centers of at least one pair of the magnetic pole teeth of the adjacent stator yokes, which are vertically arranged, are shifted with a prescribed phase difference so as to mutually cancel their cogging torque.

Abstract: A stepping motor includes a bracket, a housing having a first end coupled to the bracket and a second end having a reduced width compared with the first end, a stator disposed in the housing to form electric field, a first supporting unit formed on a first end of the bracket, a magnet fixed corresponding to the stator to provide the electric field, a second supporting unit supported on the second end of the housing, a rotor supported by the first and second supporting units, and a stopper fitted on an opened end of the second end of the housing to support the second supporting unit.

Abstract: A guiding structure includes a base and a guiding unit. The base has an opening, and an inner wall of the base, facing the opening, is formed with at least one first guiding element and at least one first restricting element disposed adjacent to the first guiding element. The guiding unit is inserted into the opening and has at least one second guiding element and at least one second restricting element. The second guiding element is correspondingly coupled to or separated from the first restricting element by deforming, bending, rotating or displacing. The first guiding element is disposed corresponding to the second guiding element.

Abstract: A motor includes a housing formed of a first shell and a second shell, a stator, which is formed of a first yoke, a second yoke, a connecting device and two coils. The first yoke and the second yoke each comprise a terminal holder mounting portion, a race and a plurality of pole pawls respectively extended from the race. The race of the first yoke has the race of the first yoke kept apart from the race of the second yoke at a distance to reduce magnetic interference, the connecting device having a terminal holder fastened to terminal holder mounting portions of the first yoke and second yoke of the stator and a plurality of metal terminals installed in the terminal holder, the coils respectively set between the first yoke and the first shell and between the second yoke and the second shell and respectively electrically connected to the metal terminals, and a rotor formed of a transmission shaft and magnets and inserted through the first yoke and the second yoke and rotatable relative to the stator.

Abstract: A stepping motor includes: a stator which includes a cup-like first (outer) yoke having a plurality of notches formed at its bottom plate, a second (inner) yoke, and a bobbin having a coil wound therearound and housed in the annular hollow space formed by the first and second yokes; and a pair of bearings each of which includes a hollow-cylindrical main body and a flange structure having a plurality of protrusions, and is attached to the stator such that the protrusions engage with the notches of the first yoke thereby preventing the bearing from rotating relative to the first yoke, and such that the protrusions make contact with a flange of the bobbin thereby precisely positioning the bearing relative to the first yoke with respect to the axial direction, which prohibits any portions of the bearing from protruding axially outwardly beyond the bottom plate of the first yoke.

Abstract: A heat dissipating fan includes a fan housing having an outer frame portion. An air inlet and an air outlet are respectively defined in two ends of the outer frame portion. A hollow motor casing is formed in and integral with the outer frame portion. An inner-rotor-type motor is mounted in the motor casing and includes a rotor and a stator. The rotor is rotatably received in the stator and includes a shaft and a magnetic element. The shaft extends beyond the motor casing. The magnetic element is coupled with the shaft and faces the stator. At least one impeller is coupled to the shaft and located outside the motor casing. A circuit board is electrically connected to the stator.

Abstract: A drive apparatus which is small in size, short in axial length, low in cost, and high in output. A stepping motor as the driving apparatus includes a first coil, a second coil, a magnet, and a rotor comprised of a core and a rotary shaft. First through fourth outer magnetic pole portions are opposed to the outer peripheral surface of the magnet with a predetermined gap between them. The first and the second coils are disposed adjacent to the magnet in an axial direction of the rotary shaft and disposed at respective ends of the rotary shaft. The first and second outer magnetic pole portions are inserted inside the first and second coils, respectively. As viewed in the circumferential direction of the magnet, the third and fourth outer magnetic pole portions are disposed close to the first and second outer magnetic pole portions, respectively.

Abstract: A retrofit kit for a printing press adjustment hydraulic actuator. The hydraulic actuator is maintained to benefit from its mounting position and alignment, but the hydraulic fluid is removed. A hydraulic actuator shaft is attached to a mechanism that converts the rotary motion of an electric motor to linear motion. The electric motor provides faster and more accurate control of the hydraulic actuator shaft than the hydraulic fluid, providing for faster adjustment of the printing press.