Abstract: A vehicular alternating current generator having a base 1 attached with at least one of a brush holder 2 and a voltage regulator and a condenser 5 attached to the base for preventing an electric noise, wherein a main body of the condenser is isolated from an outside atmosphere by a resin 13 and is disposed in a condenser accommodating body 11 while connecting leads 5a of the condenser are exposed to the outside of the condenser accommodating body and a holding portion 10 is formed in the base for accommodating the condenser accommodating body.

Abstract: A motor with a built-in capacitor is proposed. The capacitor is formed into a ring so that a shaft of the motor penetrates a center portion of the capacitor and is disposed in the motor so that the shaft of the motor penetrates the center portion. The capacitor is mounted at the same time as the motor is mounted and the mounting work of the capacitor is easy. The external shape of the motor itself is the same as that of a conventional motor. The whole structure of the motor is compact as compared with the conventional motor. The motor can be applied to a motor with a capacitor directly connected to a gear mechanism such as a transmission.

Abstract: A motor, described as a brushless permanent magnet (BPM) motor, has a cup-shaped, open bottomed enclosure having a side wall and a top wall defining a lower interior space. The side wall has a port interrupting a bottom edge. A printed circuit board or other motor electric circuit is positioned above the top wall, below the stator. Electrical conductors electrically connected to the electric motor circuit extend through the top wall and into the interior space. Current supply conductors extend through the side wall port and are electrically connected to the electrical conductors from the circuit. An enclosure cover member has, projecting into the interior space, at least one deflectable prong with an overhanging lip, and a strain relief block positioned adjacent but spaced from the side wall port. The cover has a tool-receiving aperture to permit engagement of a tool with the prong.

Abstract: A servo motor integral with a control apparatus has a servo motor section, an amplifier section and a partition body which constitutes a partition between an amplifier section and a servo motor section. The housing which contains the integrated apparatus provides support for the several elements of each section, including printed circuit board, bearings and position/velocity detector. The several elements are arranged, designed and appropriately sealed so that a low cost and effective apparatus results.

Abstract: To integrate electronics with a drive unit, given a simple manufacturing or assembly, and a compact type of construction, a printed-circuit board, which accommodates the electronic components and which is designed, at the same time, as a brush-holder plate for the commutator motor, is arranged, together with an electronic housing, parallel to housing flanges of a motor housing, of a gear housing. The printed circuit board of the drive unit, and is covered on its one axial side by the motor housing and the electronic housing, and on its other axial side by the gear housing thereby protecting it from external elements.

Abstract: A suspension control system for an automotive vehicle is provided in which a movement of a sprung mass velocity is monitored, when the magnitude of the sprung mass velocity is below a predetermined threshold value, a control unit outputs a control signal to a pulse motor to vary the position of an adjuster so that one of extension and compression stroke sides of a position member of a shock absorber, whose direction is the same as that of the sprung mass velocity provides a high damping coefficient, and when the magnitude of the sprung mass velocity is above the predetermined threshold value, a control constant for the damping coefficient is changed toward a high damping sensitivity range until the sprung mass velocity exceeding the predetermined threshold value is reduced below another predetermined threshold value, a magnitude of the other predetermined threshold value being lower than that of the predetermined threshold value.

Abstract: In a brushless motor, the number of coreless armature coils is set to 3n when the number of magnetic poles of a magnet for a magnetic field is set to 2n where n is a positive integer. An opening angle of each of the armature coils is set to 360/3n degrees. A notch portion is formed in an outer circumferential portion of the magnet for a magnetic field. A recessed portion is formed by this notch portion and an inner circumferential portion of a yoke. The recessed portion constitutes a groove for correcting a balance of each of the magnet for a magnetic field and a rotating body when this magnet and the rotating body are rotated. A motor housing and a harness are electrically connected to a printed board. The housing is connected to the ground through this harness and a harness for power. In this brushless motor, a magnetizing frequency is reduced and driving efficiency of a control circuit can improved when the brushless motor is rotated at a high speed.

Abstract: A structure for connecting electrodes of a motor unit and a motor driver unit which is a power circuit for the motor unit in an electric power drive vehicle, so that the motor unit and the motor driver unit are electrically connected to each other, includes: electrode terminals to which a coil of the motor unit is connected and which are provided with fixing nuts; substantially L-shaped electrode plates each formed at one end with a terminal portion connected to the inverter circuit and at the other end with a contact portion to which the electrode terminal is connected, the contact portion being formed with an insertion hole; L-shaped resin electrode bases for attaching the electrodes plates to a metallic frame under an insulated condition, each of the electrode bases including an elongated hole for attaching a bolt to be engaged with the insertion hole of the electrode plate and a guide groove for preventing the electrode plate from rotation; and bolts each extending through the elongated hole of the electr

Abstract: A bracket of the present invention is for use with a capacitor motor having a stator and at least one end shield. The motor end shield has a side wall the bottom of which is spaced axially upwardly and radially outwardly from an axially outer face of the stator to define a gap. The bracket has a base, a pair of legs extending upwardly from the base to snappingly receive the capacitor, and a tab which is received in the gap to secure the bracket to the motor without the use of fasteners.

Abstract: An electric motive power unit including a multiple phase AC electric machine and heat dissipative electronic components therefor, the improvement wherein the machine is disposed in a thermally conductive housing having cooling fluid passages formed therein, and the heat dissipative electronic components are individually mounted on an exterior periphery of said housing and distributed in a fashion wherein circulation of the fluid through said fluid passages for the cooling of said machine also serves to cool said heat dissipative electronic components.

Abstract: The invention provides a motor drive unit for use in conjunction with an atherectomy device which limits the torque exerted on a drive cable for rotating a cutting blade in the device. In a preferred embodiment, a motor drive unit includes a motor having a shaft coupled to the drive cable for rotating the cutting blade, a power supply coupled to the motor and a switch for selectively connecting the power supply to the motor. A torque control circuit connected to the power supply and the motor controls the torque exerted by the motor when the switch is closed, whereby the current to the motor is continuously increased from zero to a start-up level, the start-up level being the minimum current sufficient to turn the cutting blade.

Abstract: A method for combining the operation of the electrical disconnecting safety switch of an electric motor within the motor's electrical terminal housing. This method of operation results in a single, compact housing directly mounted to the electric motor body which is used for both the safety disconnect function as well as the termination point for the incoming power leads and the motor wire taps. This method of operation may be employed for single phase and three phase alternating current motors as well as commonly wired direct current motors. The method further provides for a simple and economical way of mounting the device to a variety of motor frames with the use of appropriate adapter plates. The incorporated motor safety disconnect function is available in either of two configurations. The disconnect function may be operated as a rotary tumbler switch with an external rotary hand operator which allows a fully weatherproof design.

Abstract: A PM (permanent magnet) motor is described, that uses electromagnetic current to release or pull a PM, which has increased starting torque and a large power output in a small volume. The motor includes phase units (60, FIG. 3 ) each having three electromagnets (46A-46C) and each having two PMs (44A, 44B) of Nd-B-Fe permanent magnet material. At a start position, a PM (44B) of each phase unit is centered between the cores (50B, 50C) of two electromagnets, and there is slight overlap (90, FIG. 6 ) of each of the two core faces (64B, 64C) with the PM face (62A). Each PM face has a longer circumferential length (D) than that (G) of each core face. Each PM face and each core face, has an axial length (E, FIG. 1 ) which is much larger than its circumferential length (D, G). The interface end of each electromagnet coil lies a small distance (K) from the core face.

Abstract: An in-tank type electrically operated fuel pump assembly includes an electric motor which is controlled by a control circuit located externally of a pump housing and adjacent to a passage through which fuel is fed from the pump. A case in which the control circuit is enclosed is not subjected to a high pressure, assuring stable protection of the control circuit for a long period of time. Furthermore, the control circuit is effectively cooled by the flowing fuel.

Abstract: A control circuit for a gearmotor is located internal to a plastic gearbox to reduce handling damage and damage resulting from exposure to the environment. The control circuit includes a metal track which provides an electrical conductive path for input power to an electric motor and electrical components and thereby eliminates the need for a printed circuit board. The metal track includes a plurality of alternative control circuits paths, the appropriate circuit being chosen during assembly of the gearmotor by selectively piercing knock-out tabs in the metal track. The metal track includes locking receptacles for receiving switch and d.c. motor electrical terminals and further includes crimping receptacles for receiving electrical component lead wires. The metal track is located on the internal surface of the plastic gearbox cover by integrally molded posts and is secured to the cover by ultrasonically or heat staking the posts.

Abstract: The electrically motorized wheel assembly comprises a hollow shaft having a first opening at one end thereof and a second opening, the first opening receiving conductors from outside of the assembly; a stator coaxial with and fixedly attached to the shaft, the stator being provided with a hollow portion and coils; a rotor coaxial with the stator and mounted for rotation about the stator; and converting system for converting an input electrical current to a variable AC electrical current, the converting system including power electronics fixedly mounted within the hollow portion, input terminals for receiving the input electrical current and output terminals for delivering the variable AC electrical current; whereby, to provide the variable AC current to the coils of the stator.

Abstract: An electric motor assembly has a motor housing, a stator mounted in the housing, a rotor rotatably mounted in the housing and disposed adjacent the stator, a pair of end shields mounted adjacent opposing ends of the motor housing having bearings disposed therein for rotatably supporting the rotor, a mounting bracket disposed in the housing, and a motor control component mounted in the bracket. The bracket has a one-piece, resilient body that is elastically deformable from a relaxed position to an expanded position, an engaging structure mounted on opposing portions of the body to secure the motor control component to the body, and a mounting structure that mounts the body in the housing. The bracket is mounted in the housing so that a surface thereof is disposed adjacent and interacts with an inner surface of the housing to prevent deformation of the bracket, thereby locking the component to the bracket.

Abstract: An electrical traction system notably for automobiles which has (a) at least one recharging supply source; (b) at least one synchronous electrical motor with a stator having a plurality of spatially offset stator windings, a commutating device with choppers for routing a current given by the supply source into the stator winding in order to create a rotating magnetic field, and a rotor; (c) a circuit for charging the supply source including a transformer, which transformer includes the stator windings; and (d) at least one converter for charging an auxiliary battery.

Abstract: A regenerative braking system in a motor vehicle determines a state of deceleration on the basis of the number of revolutions of a motor and an accelerator signal and performs a regenerative braking according to the state of deceleration. The regenerative braking system includes a revolution sensor for detecting;the number of revolutions of a rotor of a vehicle driving motor and an accelerator opening sensor in a RAM stores discrimination data for discriminating between a regenerative braking mode and a drive mode on the basis of the number of revolutions of the rotor and the accelerator opening and also stores on-off duty ratio data of FETs in the regenerative braking mode and that in the drive mode.

Abstract: An electronically commutated motor for dust exhausters with a stator with excitation windings and with a rotor positioned to rotate in an air gap. The rotor has bundled laminations and permanent magnets around its circumference corresponding to the number of poles of the stator. A fan rotor of a ventilator is also provided on the rotor shaft, with the fan rotor connected downstream from the motor in the intake direction of the cooling air. The rotor shaft is connected with a turbine for generation of an intake air current, wherein the fan rotor is positioned in the upper bearing plate of the turbine. The bearing plate is designed in one piece in immediate vicinity of the turbine rotor and has indentations and cutouts in a radially outward direction, whereby air currents of the fan rotor and the turbine rotor flow each from its respective side, with the exit slots for cooling air from the fan rotor and the outlets for the exhaust from the turbine going out from the bearing plate.

Abstract: An electromechanical transducer having a first element movable in relation to a second element, wherein the first and second elements perform a translational movement relative to one another. A transducer element mechanically coupled to the first element and second elements for converting the translational movement into an electrical signal. A transmission element converting the relative translational movement of the first and second elements into a rotating movement of the transducer element so as to produce the electrical signal.Applicant claims, under 35 U.S.C. .sctn.120, the benefit of priority of the filing date of Jun. 17, 1991, of International Patent Application PCT/NL91/00099, copy attached, filed on the aforementioned date, the entire contents of which are incorporated herein by reference. Applicant also claims, under 35 U.S.C. .sctn.119, the benefit of priority of the filing date of Jun. 19, 1990, of Netherlands Patent Application No.

Abstract: An arrangement of a vehicular suspension system is disclosed in which each drive circuit which outputs a drive current to a corresponding one of the actuators installed on each shock absorber is arranged at a position adjacent to the corresponding one of actuators. Thus, transmission of signals from each drive circuit to the corresponding one of the actuators is unaffected by electrical disturbance. In addition, a length of a wire connected between the corresponding one of the actuators and the drive circuit can be shortened. The generation of noises causing the electromagnetic wave interference can be prevented. In another preferred embodiment, a printed circuit board containing each drive circuit is mounted in a casing of the corresponding one of the actuators of the shock absorbers.

Abstract: A drive system for washing machines, electric vehicles or the like has its winding switched to effect speed change and an asynchronous motor operated by a frequency converter where there are more than two grooves per pole and phase with respect to the motor and the number of grooves of the rotor exceeds the number of grooves of the stator whose sheet pack is welded along the back. The windings are formed as short-pitched chord half-hole windings.

Abstract: A DC motor having a housing, a hub member rotatably supported by the housing, a flexible printed circuit board fixedly mounted on the housing, and an IC chip mounted on the flexible printed circuit board and located facing a recess formed in the housing. The hub member has a shaft rotatably supported by a bearing within the recess. The flexible printed circuit board has a metal layer for mounting the IC chip, the metal layer being isolated from a wiring pattern formed on the printed circuit board. The wiring pattern on the flexible printed circuit board is directly connected to a connection pin connected to the motor wiring.

Abstract: A miniature electric motor is provided including stator and rotor assemblies wherein the rotor assembly has a magnet and a shaft adapted to be coupled to a load to move the load and wherein the magnet is positioned about the stator assembly for rotating without the stator assembly. The stator assembly includes a stator having a plurality of branches made of a magnetic material angularly positioned with respect to each other and a plurality of coils wound about their respective branches. The shaft extends through the stator and also, preferably, through a brake which supplies pressure to the rotor assembly to thereby supply a braking force to the rotor assembly after the load has been rotated to a desired position.

Abstract: A connecting cover for a pump housing of an electric fuel pump, which pump housing accommodates a direct current motor has a cover body having a cover axis and brush guides arranged radially with respect to the cover axis and provided for guiding commutator brushes, connecting plugs projecting from the outer side of the cover body, connecting lances which connect the connecting plugs electrically with the brushes, a screening unit for screening spark interferences of the commutator brushes. The screening unit includes at least one condensor provided with two connecting wires. The body has a bottom with axially projecting ribs which form a pocket for receiving the capacitor. The capacitor has a first connecting wire abutting against one of the brush guides and a second connecting wire for contacting the pump housing or a pole pipe of the direct current motor and extending outwardly on a periphery of the body.

Abstract: An operation apparatus for a sewing machine has an electric motor for driving the sewing machine and electronic components for operating and controlling the electric motor and sewing machine; the electric motor and electronic components are accommodated within a common, heat-conductive box-type body effective to dissipate the heat generated inside the body by the electric motor and the electronic components to the outside.

Abstract: Brushless dynamoelectric machines utilizing conventional DC armature construction. The winding of the armature is modified by providing a set of three leads to its coil ring circuit at points spaced angularly about 120.degree. . Electrical energy is carried in these leads instead of a commutator and brush set. In most versions of the machine, a shell rotates about the armature, while the armature is caused to remain stationary. The three lead lines are brought out parallel to the axis of rotation through a bearing supporting the shell.

Abstract: An inverter integral type motor which is fixed with radiator board formed with a plurality of radiating fins at bottom of the inverter, and both side walls of the radiator board are fixed to both side surfaces of the motor main body. Thereby the motor main body and the inverter are integrally structured. Rubber absorbers are respectively interposed between both side walls of the radiator board and the fixing bosses formed at both side surfaces of load side and non-load side of the motor main body.

Abstract: The electrically motorized wheel assembly comprises a hollow shaft having a first opening at one end thereof and a second opening, the first opening receiving conductors from outside of the assembly; a stator coaxial with and fixedly attached to the shaft, the stator being provided with a hollow portion and coils; a rotor coaxial with the stator and mounted for rotation about the stator; and converting system for converting an input electrical current to a variable AC electrical current, the converting system including power electronics fixedly mounted within the hollow portion, input terminals for receiving the input electrical current and output terminals for delivering the variable AC electrical current; whereby, to provide the variable AC current to the coils of the stator.

Abstract: An actuator device for an electric window winder (101) having an electric motor (104) and a window displacement actuator element (112) which is displaceable with respect to a frame (102) of the device under action of the electric motor (104). An electronic unit (27) for drive and control of the electric motor (104) has power elements and is housed in a first portion (120) of the frame (102), and the electric motor is housed in a second portion of (107) of the frame (102). The first and second portions (120, 107) of the frame (102) are formed by a single one-piece body part of the frame, and the power components of the electronic unit (27) are in direct thermal contact with the first portion (120), which is formed of a thermally conductive metal material for the dissipation of heat from the power components.

Abstract: An electromagnetic interference suppressing (EMI) interconnect for connecting a DC motor to a DC source comprising a pair of copper sheets disposed between insulative sheets, and wrapped around the motor housing. A lead extends from each copper sheet for being connected to one side of the DC source. A connector tab extends from each copper sheet for being connected to one terminal of the DC motor. The copper sheets may be spaced laterally apart and disposed between a single pair of insulative sheets, or may be overlayed and separated by an insulative sheet. EMI suppression provided is greater than that possible with known capacitance devices of similar capacitance values.

Abstract: An electrical motor includes a ground brush connected to ground, first and second supply brushes connected to first and second supply lines and adapted to cause the motor to rotate at first and second speeds, and an interference suppression device comprising a common core, a first coil connected in series between the first supply brush and the first supply line and a second coil connected in series between the second supply brush and the second supply line. The space required by the device in the motor casing is less than with the conventional arrangement of two individual chokes and can provide improved noise suppression due to magnetic coupling between the two coils.

Abstract: An electric power plant comprising a battery and a DC-three-phase AC inverter, for a vehicle, in particular an automobile. The powerplant comprises at least one three-phase disk-rotor motor (6) assigned to one vehicle wheel, the supply voltage for said motor being adjustable in amplitude and frequency.

Abstract: The apparatus for feeding fuel to a motor vehicle engine from a fuel tank includes a pump portion and a direct current drive motor located in a housing part and through which the fuel flows. The commutator device of the drive motor includes commutator brushes located on the positive side and on the negative side; brush contact springs made from electrically conductive material located on the positive side and on the negative side, and a collector having a sliding surface for the brushes which are pressed on it during operation by the contact springs. To improve reliability of operation of the apparatus a negative potential is applied to the brush contact springs on the positive side and on the negative side and the brush contact springs on the positive side are electrically insulated from the commutator brushes on the positive side.

Abstract: Liquid metal electrical contact compositions are disclosed. Compositions of this invention consist of a metal mixture of first and second Periodic Table Group III metals and a lubricant. A gallium/indium metal mixture is preferred. Preferred lubricants are metal-based, most preferably molybdenum-based. The liquid metal electrical contact compositions are particularly useful for high current density applications.

Abstract: An endshield/endshield cover assembly for an electric motor includes and endshield having a base, a circumferential wall extending upwardly from the base, and a protrusion extending outwardly from the base wall. The endshield cover has a circumferential wall extending downwardly from a top. The cover wall defines a hole which is sized and shaped to fit over the projection. By aligning the endshield cover hole with the endshield projection, the endshield cover may be pivoted into place and secured with only one screw.

Abstract: The structure for a motor having a rotor (R) and a stator (S) comprises a support hub (10) with branches (11), a sleeve (12) and if desired a cover (13), a mandrel (20) with a tube (21) and a radially inwardly-extending flange (22), and a connector (30) in the shape of a frustoconical ring (31). Application in automatically manufactured motors for the equipment of motor vehicles.

Abstract: A brush holder and voltage regulator are secured to a metallic end frame of an alternating current generator by a metal screw that extends through aligned openings that extend respectively through the brush holder and voltage regulator. The brush holder has a pair of opposed metal terminals and the voltage regulator has a pair of opposed metal terminals. All of the terminals have openings that are aligned with the openings in the brush holder and voltage regulator. The screw extends through the openings in the terminals and has a threaded portion that is threaded into a threaded bore in the end frame. One of the terminals on the brush holder directly engages a surface on the end frame. The other terminal on the brush holder directly engages a terminal on the voltage regulator. The other terminal on the voltage regulator is electrically connected to the end frame by the screw.

Abstract: A DC brushless motor for use in various kinds of electric appliances comprises a rotor portion, and this rotor portion includes a rotating shaft and a cylindrical permanent magnet which is rotated with the shaft. A stator portion is provided opposite to the rotor portion, and includes an armature which is located at the inner side of the cylindrical permanent magnet so as to be opposite to and coaxial with the magnet. The armature is provided with a plurality of coils on its peripheries, and has an annular shape as a whole. A circuit board is disposed to be substantially perpendicular to the axis line of the rotating shaft, and the armature is supported above the circuit board. The rotating shaft terminates substantially at the middle of the height of the motor, thus leaving a space between the rotating shaft and the circuit board.

Abstract: A regulator and brush holder assembly having a regulator assembly attachable to an alternator adjacent to the alternator's slip rings and a housing attached to the regulator assembly. The housing has a brush holder portion and a regulator compartment enclosing the regulator circuit of the regulator assembly. The brush holder portion has a pair of spatially separated brush holder compartments and a pigtail chamber associated with each brush holder. The associated brush holder compartments and the associated pigtail chambers have an open end and a closed end and are connected by a slot. Brush terminals are attached to the housing and extend into the open end of the pigtail chambers. A carbon brush is slidably received in each brush holder cavity and its pigtail connection is connected to the associated brush terminal through the slot.

Abstract: A brush bridge assembly for an electric motor an electrically insulating carrier body having a base plate having opposite inner and outer surfaces and a generally circular perimeter; and a cylindrical side wall extending axially from the perimeter of the base plate. The brush bridge assembly further has a plurality of brush guides supported on the inner surface of the base plate; a carbon brush supported in each brush guide for a radial displacement relative to a central axis of the carrier body; a spring connected to each carbon brush for urging the carbon brush radially inwardly; supporting elements mounted on the inner surface of the base plate in a uniform distribution; heat generating electric components and fixed contact terminals held in the supporting elements.

Abstract: A fine tracking miniature galvanometer actuator is used as a fine tracking positioner for a read/write head in the optical disk drive of an information storage and/or retrieval system. An efficient magnetic circuit is used in conjunction with a small and lightweight rotor design which offers high performance characteristics in terms of frequency response and sensitivity. No mechanical springs or torsion bars are necessary to maintain the rotor in a neutral or zero position. The present invention is also useful in other systems using electro-optical transducers including reflecting-type galvanometer recording systems used for producing variable-area sound tracks .

Abstract: The present invention provides an arrangement of a motor intended to prevent transmission of vibrations, i.e., noises between a noise preventing circuit and the motor. The noise preventing circuit is formed into a unit, thereby realizing simple and automatic installation thereof into the motor without giving influences upon the vibration preventing structure of brushes. According to the arrangement, the noise preventing circuit may not be used and the specifications thereof may be easily changed.

Abstract: A choke-coil fixture for miniature motors of a type having choke coils housed in recesses formed in an end bell closing an end of a motor housing, characterized in that choke-coil housing recesses are formed in such a manner as to lock ends of the choke coils when the choke coils are inserted into the recesses in the longitudinal direction, terminals having flat portions for pushing the other ends of the choke coils at portions electrically connecting the lead ends of the choke coils, and engaging portions for locking to the end bell is disclosed. The terminals for miniature motors can have positioning portions for positioning the terminals with respect to the lead ends of the choke coils, and cylindrical portions for engaging with the connecting power-feeding connecting pins; the cylindrical portion adapted to be flexible in size by being plastically deformed.

Abstract: A spin motor assembly of a disk drive apparatus includes a stator having a plurality of wound coils associated therewith, and a rotor having a plurality of magnetic poles. Each winding structure of the stator is made up of two winding portions, with only one winding portion being used to drive the rotor relative to the stator upon drive current being applied to the winding structure, but with both winding portions being used to generate back electromotive force when drive current is cut off from the winding structure. This generated electromotive force is used to actuate an actuator motor to unload the read-write heads from the disk surface. As an alternative, each winding structure of the stator is made of a single winding, and the winding structures are used successively to drive the rotor relative to the stator, but with at least two winding portions generating back electromotive force when drive current is cut off.

Abstract: The present invention is a lateral electric motor which can be driven in a single stage drive mode, a two stage drive mode or any other multiple drive stage mode. The main components of the lateral electric motor include permanent magnet poles mounted within a disk rotor which is positioned axially along a shaft and in between a first stator housing assembly and a second stator housing assembly. The first and second stator housing assemblies include wound armature coils mounted to lamination blocks and positioned to face opposite the permanent magnet poles. Each stator is configured with a first segment comprising a plurality of armature coils connected in series wherein the first segment is connected in parallel to a second segment through a switching device to a power supply. With this type of configuration the first and second stator housing assemblies can be further configured to either individually drive the lateral electric motor or be connected to drive the electric motor simultaneously.

Abstract: A 2-D pointer motor provides for panning (sideways actuate motion) and tilt (yaw motion) and may be made smaller than one-cubic inch. The motor is preferably controlled by a microcomputer based controller using pulse-width modulation (PWM) to separately control each of its three coils. The coils are arranged orthogonally to provide a single unified torque vector which turns the rotor and accurately points it in the desired directions. The motor is especially adapted to carry a sensor such as a CCD array.

Abstract: The electric motor is provided with an attached frequency converter for rotational speed control. The frequency converter consists of a power supply and other electronic elements. While these electronic elements are arranged as a constructive unit with the electric motor, the power supply is arranged as an individual constructive unit separated from the motor, in the form of a module. The module can be made separately from the motor and electrically connected to the motor constructive unit through a connective cable. The use of the motor is no longer dependent on cooling radiators, required for the cooling of the power supply, as only the module is now fitted with cooling radiators.

Abstract: An electric machine includes an armature which has a permanent-magnetic excitation part of the machine and a stator which has an induction part of the machine. The induction part includes a first and a second region, each region equipped with current conductors. The armature and the stator are movable relative to each other. The machine includes an electronic commutator which has electronic components. An adjustment to purposefully change a voltage induced in the induction part during operation of the machine, by adjustment of the relative phase of the voltages induced in the two regions of the induction part is achievable due to the first region of the induction part being physically adjustable relative to the second region of the induction part in the direction of relative movement of the armature and the stator. In addition, a sensor is provided in the second region for detecting the instantaneous relative position of the armature and the stator.