Abstract: A compact turbo-molecular pump having a high depressurizing capability. A motor driving the pump includes a rotary shaft, the distal and basal ends of which are supported by magnetic bearings. Each magnetic bearing has a rotated magnet, which is rotated integrally with the rotary shaft, and a fixed magnet, which is opposed to the rotated magnet. The rotated and fixed magnets repel each other. The diameter of the magnetic bearing at the distal end of the rotary shaft is greater than that of the magnetic bearing at the basal end. This decreases movement of the rotary shaft toward its distal end when the pump operates.

Abstract: A bearing apparatus includes a rotator body, a non-rotation body rotatably supporting the rotator body, and a lubrication fluid provided between the rotator body and the non-rotation body in which the rotator body is supported in a thrust direction by a thrust dynamic pressure bearing formed between the rotator body and the non-rotation body. The bearing apparatus includes an active magnetic bearing formed by a driving coil disposed on one of the rotator body and the non-rotation body and a magnet disposed on the other thereof, and a gap sensor that detects an axial direction gap between the rotator body and the non-rotation body. The thrust dynamic pressure bearing and the active magnetic bearing are combined such that the static rigidity of the bearing apparatus is born by the active magnetic bearing and the dynamic rigidity is born by the dynamic pressure bearing.

Abstract: A brushless motor comprises a casing including an axle seat with an axle hole, the axle hole having a flange provided therein. An axle tube is engaged on the axle seat and includes a bearing mounted therein for rotatably holding a shaft of a rotor. The shaft includes a distal end that extends beyond an end face of the bearing, the distal end including a neck to thereby define an annular groove. An engaging member mounted in the axle hole of the axle seat and retained in place by the bearing or the axle tube. The engaging member includes a hole having an inner diameter smaller than a diameter of the shaft of the rotor. An inner peripheral wall defining the hole of the engaging member includes a plurality of notches to thereby allow forcible passage of a distal end of the shaft through the hole of the engaging member. The peripheral wall of the hole of the engaging member is located in the annular groove of the shaft after the distal end of the shaft is passed through the hole of the engaging member.

Abstract: A stator winding includes a plurality of winding sub-portions in each of which a strand of wire formed from a continuous wire is wound so as to alternately occupy an inner layer and an outer layer in a slot depth direction within slots at intervals of a predetermined number of slots and form a lap winding having two turns in each lap, the strands of wire folding over outside the slots at end surfaces of a stator core, four of the strands of wire constituting the winding sub-portions begin housed so as to line up in each of the slots in a slot depth direction, turn portions formed by folding the strands of wire over outside the slots at a first end surface of the stator core being disposed circumferentially to form two rows in a radial direction, and turn portions formed by folding the strands of wire over outside the slots at a second end surface of the stator core being disposed circumferentially to form two layers in an axial direction.

Abstract: A stator of a dynamo-electric machine suppresses short-circuiting attributable to joint portions so as to provide good insulating properties. In a front coil-end group, a turn portion of a first conductor segment and a joint portion of end portions of a second conductor segment are adjacently aligned in a single row in a radial direction, being arrayed in two rows in a circumferential direction. In a rear coil-end group, a joint portion of the end portions of the first conductor segment and the turn portions of the second conductor segment are adjacently arranged in a single row in the radial direction, being arrayed in two rows in the circumferential direction.

Abstract: A high voltage stator bar 20 (FIG. 7) is used in a power generation system and includes a core section having a core 32 and stator coil 23, including at least one coil involute. A ground wall insulation layer 40 overlies and surrounds the stator coil. An inner grounding electrode 42 overlies and surrounds at least a portion of the ground wall insulation layer and includes the at least one coil involute. An insulator 46 overlies and surrounds the inner grounding electrode and leaves at least one exposed area 51 of the inner grounding electrode. An outer grounding electrode 52 overlies and surrounds the insulator and is electrically connected to the inner grounding electrode at the at least one exposed area of the inner grounding electrode for relieving a build-up of internal voltage, thereby preventing partial discharge.

Abstract: An electromagnetic actuator has a stator core, an armature and a coil. The stator core is formed as a seamless cylindrical tube having a thin wall as a magnetic restrictor. The thin wall has a thickness sufficient to maintain a mechanical strength of the stator core. A permanent magnet is located on an outside of the thin wall to generate a magnetic flux passing through the thin wall in the same direction as a magnetic flux generated by the coil. The thin wall is magnetically saturated with the magnetic flux generated by the permanent magnet. When the coil is energized, a magnetic flux generated by the coil gets around the saturated thin wall and passes through the armature.

Abstract: A power generation system (10) including an apparatus for attaching a generator stator core (20) to a frame support (30) and associated methods are provided. The system (10) preferably includes a stator core frame support member (30) and a generator stator core (20) including a plurality of keybars (22) positioned spaced-apart and extending along outer peripheral portions of the generator stator core (20). The generator stator core (20) is positioned to overlie the stator core frame support member (30). The system (10) further includes a core supporter (40) connected to the stator core frame support member (30) and positioned to contact the generator stator core (20). The core supporter (40) includes first (43) and second (44) core connectors (42) for low tuning the natural frequency of a generator stator core (20) and for stabilizing the power generation system during operation.

Abstract: The invention describes a fuel injection system comprising a piezoelectric element for controlling an amount of injected fuel, by charging and discharging the piezoelectric element using a driving circuitry, and a current diagnosis unit capable of detecting a fault of a current flowing in the driving circuitry within 10 &mgr;sec of the fault occurring.

Abstract: A piezoelectric/electrostrictive device comprises a pair of mutually opposing thin plate sections, a movable section, and a fixation section for supporting the thin plate sections and the movable section. A piezoelectric/electrostrictive element is arranged on at least one thin plate section of the pair of thin plate sections. A hole is formed by the inner walls of the pair of thin plate sections, the movable section and the fixation section. A central portion of the movable section is cut off to form mutually opposing end surfaces in the movable section.

Abstract: An ultrasonic suture device is provided for drilling arc shaped holes through hard materials, such as metals, glass, or bone. The ultrasonic suture device includes a transducer, horn and probe. The probe is constructed of three sections including a stem section, extension section and arc section. The stem section extends along the longitudinal axis of the ultrasonic suture device, while the arc section is constructed in the shape of an arc of a circle and is positioned concentrically with the stem's axis. At the distal extremity of the probe is a tip constructed for drilling into hard materials.

Abstract: An electronic component comprises a substrate having a surface on which an electrode is formed and an SAW circuit element having a surface on which a circuit is formed. The circuit element is held such that the surface of the circuit element and the surface of the substrate are opposed to each other. A bump electrode joins the circuit on the circuit element and the electrode of the substrate together, and a sealing material joins the circuit element and the substrate together in the periphery of the space between the circuit-forming surface of the circuit element and the substrate. The space between the circuit-forming surface of the circuit element and the substrate is hermetically sealed by the circuit element, the substrate, and the sealing material. Advantageously, a low-temperature soldering material such as solder, or an adhesive, is used as the sealing material.

Abstract: A method for thermal control of a lamp assembly which includes an arc lamp and an associated reflector enclosed within an outer housing. The method includes providing a predetermined air flow path within said housing whereby a continuous flow of ambient air is passed over the lamp during lamp operation which reduces the operating temperature of the lamp and increases lamp life.

Abstract: To form a sharp edge portions of an electron emission part of a field emission type cathode to face an electron application surface. At least an electron emission part 40 of a field emission type cathode K is constituted by stacking thin plate-like conductive fine grains 30 and the field emission type cathode K is formed so that the plane direction of the thin plate-like fine grains of the electron emission part 40 crosses an electron application surface.

Abstract: A field emission array includes a dielectric structure with at least two dielectric layers between the cathode and anode grid thereof. The lower dielectric layer is planarized to minimize the occurrence of electrical shorts between the cathode and anode grid of the field emission array. Thus, the upper dielectric layer is substantially free of any electrically conductive defects or imperfections that extend through the lower dielectric layer. In addition, the field emission array includes an array of emitter tips, which are laterally surrounded and may be spaced apart from the dielectric structure. The field emission array may also include a grid over the dielectric structure and the emitter tips, with the emitter tips being exposed through grid openings or apertures.

Abstract: A field emission-type electron source (10) is provided with a conductive substrate (1), a semiconductor layer formed on a surface of the conductive substrate (1), at least a part of the semiconductor layer being made porous, and a conductive thin film (7) formed on the semiconductor layer. Electrons injected into the conductive substrate (1) are emitted from the conductive thin film (7) through the semiconductor layer by applying a voltage between the conductive thin film (7) and the conductive substrate (1) in such a manner that the conductive thin film (7) acts as a positive electrode against the conductive substrate (1). The semiconductor layer includes a porous semiconductor layer (6) in which columnar structures (21) and porous structures (25) composed of fine semiconductor crystals of nanometer scale coexist, a surface of each of the structures being covered with an insulating film (22,24).

Abstract: A dynamic focus electron gun for a color cathode ray tube including a cathode, a control electrode and a screen electrode, which constitute a triode, a first focusing electrode having three vertically elongated electron beam through-holes formed through its emitting surface, a second focusing electrode which constitutes a quadrupole lens together with the first focusing electrode and having three circular electron beam through-holes formed through its entering surface facing the emitting surface of the first focusing electrode, and a final accelerating electrode installed adjacent to the second focusing electrode and constituting a main electronic lens together with the second focusing electrode.

Abstract: An organic electroluminescent element which is highly precise and minute, uniform in light emission, free from cross talk, resistant to external pressure, and further excellent in sealing properties and a equipped, between a lower electrode 3 and a counter eletrode 4 each on a substrate 2, with an intervening organic layer 5 comprising a light-emitting layer, comprises an inter-insulator film 6 having a coefficient of water absorption of at most 0.1% in a non-light-emitting element portion; step portions 9 in the inter-insulator layer 6 which define the boundary between a light-emitting element portion and a non-light-emitting element portion and which comprise rising parts almost perpendicular to the surface of the lower electrode 3; and a sealing plate or a sealing lid 7 which is placed over the inter-insulator layer 6 and which is attached to the substrate 2 via an adhesive layer 8.

Abstract: A mercury-free high pressure sodium vapor lamp is dosed with sodium, xenon and zinc as an elemental metal additive. The addition of the metal additive prevents an undesirable low-voltage operating mode of the sodium-xenon discharge associated with a mercury-free HPS lamp, which otherwise occurs when sodium is no longer available to participate in the arc discharge.

Abstract: In a plasma display device comprising a pair of opposing insulating substrates and a plurality of light emitting cells 5 formed from partition walls which divide the space between the insulating substrates while a plurality of electrodes are formed in the light emitting cells 5 and the inner space is filled with a discharge gas and plasma being generated by applying a voltage selectively between the electrodes so that the fluorescent substances 4 formed on the inner walls of the light emitting cells emit light as light emitting elements, wherein sizes of the light emitting cells 5 of different colors are made different according to the luminance of the fluorescent substance of the corresponding color.

Abstract: In a display panel, the luminance and contrast are improved by making a partition semitransparent, which is a constituent element adjacent to a light-emitting section. A visible light incident on the partition proceeds inside the partition while being attenuated at a constant rate. When an external light incident on the partition from the front side is reflected off the bottom surface of the partition and returns to the front side again, the external light reciprocates inside the partition. Since the external light is largely attenuated by the reciprocation, the partition seemingly functions as an optical absorber with respect to the external light. A light emitted by the light-emitting section can transmit through the partition and radiate to the outside from the front side.

Abstract: A low-pressure mercury-vapor discharge lamp comprises a discharge vessel (10) and a first and a second end portion (12a). The discharge vessel (10) encloses a discharge space provided with a filling of mercury and a rare gas in a gastight manner. Each end portion (12a) supports an electrode (20a) arranged in the discharge space. Current supply conductors (30a, 30a′) extend from the electrodes (20a) through the end portions (12a) so as to project from the discharge vessel (10). An electrode shield (22a) encompasses at least one of the electrodes (20a). According to the invention, the electrode shield (22a) is mounted on the current supply conductors (30a, 30a′). Preferably, the electrode shield is clamped to the current supply conductors. The electrode shield is preferably provided with recesses to accommodate the current supply conductors. Preferably, the current supply conductors are flattened at the location where the electrode shield is mounted on the current supply conductors.

Abstract: An arc discharge lamp, such as a metal halide arc discharge lamp, has an extended life by reducing loss of the metallic portion of the fill. At least one component of the fill reacts with fused silica in the arc tube or diffuses through the arc tube walls. The fill will generally comprise a sodium halide, at least one additional metal halide, and an inert starting gas. A borosilicate glaze which is vitreous and light-transmissive is provided on the wall of the arc tube. The borosilicate glaze is comprised of a borosilicate glass containing at least one metal oxide selected from aluminum, scandium, yttrium, and the rare earth elements. The borosilicate glaze may further contain additional rare earth elements or transition metals to alter the light or energy emission of the lamp by absorbing select wave lengths. For instance, titanium, ceria, cobalt, chromium, iron or neodymium, or combinations of the foregoing, may be added.

Abstract: A piezoelectric transformer includes a piezoelectric unit. The piezoelectric unit includes a plurality of driver units divided by at least one groove extending in the longitudinal direction of the piezoelectric unit from one end thereof, and also includes a plurality of generator units, opposing the driver units, divided by at least one groove extending in the longitudinal direction of the piezoelectric unit from the other end thereof. Opposing pairs of the driver units and the generator units constitute a plurality of transformer units. The transformer units differ in length from one another.

Abstract: To construct a CRT display device capable of effectively suppressing unwanted radiation of electromagnetic waves occurring as a result of horizontal deflection or vertical deflection. A correction lead (6) series-connected to horizontal deflection coils (1) is disposed at outer peripheral positions of the horizontal deflection coils (1) and between the horizontal deflection coils (1) and a faceplate of a CRT (4). With this arrangement, electromagnetic fields produced by the horizontal deflection coils are canceled out by electromagnetic fields produced by the correction lead (6), thereby suppressing unwanted radiation of electromagnetic waves at the deflection frequency and its harmonic components.

Abstract: In order to make continuous lamp operation in a failsafe lamp, particularly a lamp for medical applications, having a discharge lamp possible even When changing over between a power supply system (low voltage supply system of, for example, 24 V) and an additional safety power supply (ZSV), a buffer store is discharged in the event of a fault in the power supply for a supply unit for the lamp by changing over to a standby power source, or, once the fault has been elitinated, from the standby power source back to the normal power supply, the buffer store outputting electrical energy to operate the discharge lamp. The electrical energy supplied to the supply unit (EVG) first passes through a full-wave rectifier and is then supplied to a voltage converter containig the buffer store. The discharge lamp is subsequently supplied with the electrical energy via a power-regulated inverter. Thus, it is ensured that, even for changeover procedures with different current types—e.g.

Abstract: A lamp ballast for energizing a lamp has short circuit protection. The lamp ballast contains a transformer that provides an output voltage to the lamp. The transformer has a primary winding, a secondary winding, and a third sense winding. The third sense winding has an output that provides an indication of transformer output voltage. A reference voltage circuit creates a reference voltage that provides an indication of a non-short circuited lamp ballast condition. A comparator compares the reference voltage and the output of the third sense winding to provide an indication if the third sense winding output is below the reference. This indicates if there is a short in the output of the lamp ballast. The secondary is wound on multiple sections of a bobbin with one section being a low voltage section. The sense winding is wound under the secondary in the bobbin secondary low voltage section.

Abstract: A display device comprises an array of pixels arranged in rows and columns, each pixel comprising a current-driven display element, for example an electroluminescent display element. Driver circuitry is provided for producing current signals for driving the display elements. The driver circuitry generates a voltage function and supplies it to the input of a binary weighted capacitor network, each capacitor of the network being connected in series with a respective switching transistor. An input word to the driver circuitry controls the switching of the switching transistors, such that the output current of the driver circuitry is a function of the voltage function and of the combined capacitance of the capacitors of the network for which the associated switching transistor is closed. The output current is supplied to a selected pixel of the array.

Abstract: A ballast for feeding a high-pressure discharge lamp. The ballast: supplies the lamp with an AC voltage at an ignition frequency (fi) during an ignition period (ti), supplies the lamp with an AC voltage at a glow frequency (fg) during a glow period (tg) following the ignition period (ti), repeats the start-up sequence of ignition period and glow period (ti, tg), supplies the lamp with an AC voltage at an operating frequency (fb) during an operating period (tb) following the last start-up sequence, and interrupts the power supply to the lamp in a start-up sequence, not being the last start-up sequence, during an interruption period (td) following the glow period (tg).

Abstract: An illuminator assembly that is capable of utilizing a plurality of light sources to produce a desired resultant hue, includes a processor, a memory, a plurality of light sources and a detector. The memory is coupled to the processor and stores data and information. Each of the plurality of light sources are coupled to the processor and produce a different color. The processor is capable of independently controlling the intensity of each light source so as to produce a desired resultant hue. The detector is also coupled to the processor. The detector provides the processor with information which the processor utilizes in determining how to adjust the intensity of each of the light sources to provide the desired resultant hue.

Abstract: A method of color mixing a very high frequency operated HID lamp which effectuates power modulation to the HID lamp at a frequency of the second longitudinal acoustic mode by modulating the duty cycle of a half bridge configured resonant inverter. The duty cycle is modulated with a modulation frequency which is substantially one-half the frequency of the second longitudinal acoustic mode of the HID lamp. In operation, exciting the second longitudinal acoustic mode of the HID lamp with the half bridge configured resonant inverter operated with a modulated duty cycle achieves color mixing along a vertical axis of the HID lamp.

Abstract: In a control apparatus for a self-heating type cold-cathode discharge tube, a microcomputer determines boosting time based on a detected surrounding temperature of the cold-cathode discharge tube. The boosting time is increases as the detected temperature decreases. A switching circuit, powered from a direct current power supply, performs a switching operation based on a determination output from the microcomputer. An inverter circuit actuates the cold-cathode discharge tube based on the switching operation which is duty-controlled. The duty ratio is determined to be higher when the detected surrounding temperature is within a predetermined low temperature range than outside the predetermined low temperature range.

Abstract: A color TV tube apparatus having a horizontal deflection coil for generating a pincushion-shaped horizontal deflection field, which uses a self-convergence method. In such a color TV tube, the horizontal deflection coil is adjusted so that the vertical focus points of the electron beams lie 50 mm or less on the inside and 30 mm or less on the outside of each edge of the effective display screen area along the horizontal axis. The horizontal deflection coil is adjusted with the focusing of an electron beam by a lensing action of an electron gun non-operational.

Abstract: Systems and methods for tuning a charged particle accelerator (40) are described. An accelerator tuning system (44) includes a graphical user interface (110) that guides a tuning technician (42) through an accelerator tuning process and interfaces with a measurement instrument (46) configured to measure characteristic parameters of the accelerator (40). The graphical user interface (110) enables the technician (42) to make parameter measurements and interpret the results of those measurements more quickly and easily. A computer (50) may be programmed to generate the graphical user interface (110), and instructions (51) for generating the graphical user interface (110) may be carried on a computer-readable medium. An accelerator tuning method includes the steps of guiding a user through an accelerator tuning process and interfacing with a measurement instrument (46) configured to measure characteristic parameters of the accelerator (40).

Abstract: An oscillation apparatus includes an oscillation mechanism for reciprocating an oscillating roller which can be rotated in the circumferential direction and can be reciprocated along the axial direction; an oscillation-width adjustment mechanism for adjusting the oscillation width of the oscillating roller; an oscillation-mechanism drive motor for operating the oscillation mechanism; an oscillation-width adjustment motor for operating the oscillation-width adjustment mechanism; oscillation-width controller for controlling operation of the oscillation-width adjustment motor such that the oscillation width of the oscillating roller attains a designated value; and oscillation-number controller for controlling operation of the oscillation-mechanism drive motor, on the basis of the number of revolutions of the plate cylinder, such that the number of oscillations of the oscillating roller per unit number of revolutions of the plate cylinder attains a designated value.

Abstract: A method and device are disclosed for controlling a polyphase motor having a plurality of windings. The device includes a memory device having stored therein data representing a predetermined driving profile, and driver circuit for driving the windings of the polyphase motor based upon the data provided by the memory unit. A feedback control loop is included having an input connected to a selected winding of the polyphase motor and providing an address signal to the memory device that is based upon a current level of the selected winding at around the time the back electromotive force (bemf) signal corresponding thereto crosses a zero reference, for controlling current provided to the windings by the driver circuit so that, for each winding, the current provided thereto is substantially in phase with a back electromotive force (emf) signal corresponding to the winding.

Abstract: A controller for an electronically commutated electrical machine receives a feedback signal indicative of a parameter which it is desired to minimize, e.g. torque ripple, current, voltage, vibration or acoustic noise. The controller computes the amplitude and phase of a set of harmonics in the parameter and sequentially injects harmonics of the correct amplitude and phase to minimize the parameter. An optimizing routine iterates through the set of harmonics to further reduce the parameter.

Abstract: A motor brake releasing device includes an electromagnetic brake for locking a motor shaft and a switch mounted between the electromagnetic brake and a releasing-power-supply for the brake. The switch can be operated by an AND signal produced by a motor driving signal and a motor-brake-release-permitting signal. This structure allows a motor brake to be released when a motor driving system encounters an obstacle, although the motor is left free. The structure also can prevent a final object of the motor shaft from dropping due to its own weight.

Abstract: A method and apparatus for controlling the torque of and reducing torque ripple in a permanent magnet motor without using current sensors. By eliminating the need for current sensors, low frequency torque ripple is reduced. A voltage mode control method is implemented to control the motor. In response to the position and speed of the rotor and a torque command signal, a controller develops motor voltage command signals indicative of the voltage required to produce the desired motor torque. A rotor position encoder determines the angular positions of the rotor. From the angular positions of the rotor, a speed measuring circuit determines the speed of the rotor. The position and speed signals are applied to the controller. The controller uses this information and develops the motor voltage command signals indicative of the voltage needed to produce the desired motor torque. An inverter is coupled between a power source and the controller.

Abstract: A method of bridging partial tightnesses of moveable members received in guides and driven by electric drive motors provides an automatic monitoring function. Within a tightness region, a releasing force is varied in one or several steps. An automatic bridging function is utilized, which corresponds to the rotary speed course, and an automatically operating control operates so that the releasing force is increased only in a limited region of the identified bridging location.

Abstract: Disclosed is an electric motor system with reduced torque ripple comprising a sinusoidally magnetized permanent magnet, a sinusoidal inverter, a higher resolution position sensor, a composite iron stator yoke, a composite reinforced plastic rotor core and shaft; and a high gear ratio gear reduction box. The novel combination of magnet, inverter, sensor, plastic rotor core and shaft and high gear ratio gear box substantially reduces the torque ripple on the shaft of said motor system.

Abstract: A method for starting an open-loop vector control of a synchronous machine by determining a stator inductance model of the machine; measuring the stator iductance in a plurality of directions; arranging the measured inductances in the model to form model parameters resulting in minimum error; checking the polarity of rotor magnetization to verify the direction thereof; initializing flux linkages of the open-loop vector control according to the model parameters and the direction of rotor magnetization; and starting the machine by the open-loop vector control method.

Abstract: A method for controlling a two-phase stepping motor gauge for an instrument cluster includes the steps of: providing a two-phase motor for displaying information to a driver, determining a desired position of the two phase motor at a rate and in a manner consistent with an intended application; updating a waveform to the input of a first inverter coupled to one of the motor coils; integrating the waveform using a first and second inverter to energize one of the motor coils. Thus, the present invention allows the control of a conventional two-phase motor coil using only one control signal. Additionally, the present invention requires low actual current to maintain gauge position.

Abstract: The present invention provides AGV systems with automatic recharging and a central processor for control. The central processor monitors the charge states of the AGVs, assigns them to tasks, and can determines when to recharge the AGVs. The central processor can optimize the operation of the AGVs to achieve various objectives which can include, for example, maximizing AGV availability, maximizing battery life, and/or maximizing recharging station utilization. Systems and methods of the invention can maximize the utilization of AGV equipment and minimize the number of AGVs required to accomplish a given set of tasks.

Abstract: A rechargeable battery which may be used with most presently available hearing aids (or other appliances) with no modification to the existing hearing aid is needed in order to use the described wireless charging system. The battery may be known a “Dynamic battery” as the battery is actively charged by means of an inductor circuit built into the battery housing itself or added onto the battery. The hearing aid may simply be placed within the charger housing (or cradle) to charge the battery. No electrical connection by either wires or electrical contacts is needed to recharge the battery, which is located inside the hearing aid housing. Moreover, the battery need not be removed from the hearing aid (or other appliance).

Abstract: To improve the performance of an inductive coupling system, the magnetic coupling between the primary (4) and secondary (8) windings is increased by adding auxiliary windings (26,28) on the primary (2) and/or secondary (6) yokes of the assembly near the air gap (18) between the yokes. Capacitors (30,32) are connected to the auxiliary windings (26, 28) which, together with the inductance of the auxiliary windings, resonate at the operating frequency of the primary AC voltage (Vp). The effect is an improved magnetic coupling between the primary and secondary windings (4, 8) without increasing the size of the magnetic assembly.

Abstract: A battery exchange apparatus having a structure which allows a battery to be easily taken in or out of the battery exchange apparatus and to provide a small-size battery exchange apparatus suitable to be used in an indoor facility. The battery exchange apparatus has a plurality of slots, and batteries inserted in the slots are charged by chargers. The battery thus charged is rented to a user in accordance with instructions. Upon rental of the battery, a battery lock provided on a retaining mechanism is released, and the battery projects forwardly more than an adjacent battery not to be rented. The slot holding the battery includes a first interior section, innermost in the slot for securing the battery, and a second interior section that is wider than the first interior section. The second interior section allows a user to easily hold the end portion of the battery. Further, the battery itself has a palm-size cross-sectional shape, allowing a user to easily hold the battery.

Abstract: A battery charger and receiver arrangement is constructed to include a battery charger adapted for charging the battery of a wireless signal source, the battery charger having a cable for connection to a computer and an electric female connector, and a detachable receiver adapted for receiving signal from the wireless signal source to be charged by the battery charger and transmitting received signal to the computer through the cable of the battery charger, the receiver having an electric male connector connectable to the electric female connector of the battery charger for transmission of signal to the computer through the cable of the battery charger.

Abstract: An electronic equipment is connectable to a battery unit which includes an electronic circuit and a battery, and is provided with a power supply circuit to supply a power supply voltage directly to the electronic circuit.

Abstract: A power management scheme for a computer system prioritizes battery charging. The scheme includes determining when the output of a power adapter, which powers a computer and a battery subsystem, has reached or is about to reach a threshold which may be the power budget for the computer system. When this happens, rather than throttling battery charging, the system throttles back an aspect of the computer. Alternatively, after the computer has been throttled back, if the power budget still is being exceeded or is about to be exceeded again, then battery charging can be throttled back. In yet another embodiment, battery charging can be throttled first, followed, if necessary, by computer throttling.