Abstract: An improved rotating electrical machine having permanent magnets and method for attaching the magnets that permits the use of thin, high flux density materials. The magnets and their mounting plate have facing cylindrical surfaces that are spaced slightly apart and through which an adhesive is introduced by capillary action through a groove formed at one end of the permanent magnets for providing attachment without having excess adhesive that can protrude beyond the surface of the magnets.

Abstract: The magnetic circuit of synchronous compensator plant is included in an electric machine which is directly connected to a high supply voltage of 20-800 kV, preferably higher than 36 kV. The electric machine is provided with solid insulation and its winding(s) is/are built up of a cable (6) intended for high voltage comprising one or more current-carrying conductors (31) with a number of strands (36) surrounded by at least one outer and one inner semiconducting layer (34, 32) and intermediate insulating layers (33). The outer semiconducting layer (34) is at earth potential. The phases of the winding are Y-connected, and the Y-point may be insulated and protected from over-voltage by means of surge arresters, or else the Y-point is earthed via a suppression filter. A procedure is used in the manufacture of a synchronous compensator for such plant, in which the cable used is threaded into the openings in the core for the magnetic circuit of the synchronous compensator.

Abstract: A number of embodiments of rotating electrical machines and methods for winding them that provides a high space utilization and very effective winding with less likelihood of damage to the insulation of the wire of the winding during the winding process. The arrangement basically does not require the winding needle to be moved back and forth in the slot between the poles but rather employs insulating inserts that are positioned on the axial faces of the poles outside of the gaps for guiding the wire from one end to the other so as to provide the high space utilization. In one embodiment the insulating insert effectively changes the circumferential length of the coil winding that decreases in an axial direction along their length.

Abstract: A microelectromechanical system is disclosed that uses a stiff tether between an actuator assembly and a lever that is interconnected with an appropriate substrate such that a first end of the lever may move relative to the substrate, depending upon the direction of motion of the actuator assembly. Any appropriate load may be interconnected with the lever, including a mirror for any optical application.

Abstract: The present invention provides a MEM system (10) having a platform (14) that is both elevatable from the substrate (12) on which it is fabricated and tiltable with one, two or more degrees of freedom with respect to the substrate (12). In one embodiment, the MEM system (10) includes the platform (14), a pair of A-frame structures (40), and two pairs of actuators (30) formed on the substrate (12). Ends (46A) of rigid members (46) extending from apexes (40A) of the A-frame structures (40) are attached to the platform (14) by compliant members (48A, 48B). The platform (14) is also attached to the substrate (12) by a compliant member (48C). The A-frame structures (40) are separately pivotable about bases (40B) thereof. Each pair of actuators (30) is coupled through a yoke (32) and displacement multiplier (34) to one of the A-frame structures (40) and is separately operable to effect pivoting of the A-frame structures (40) with respect to the substrate (12) by equal or unequal angular amounts.

Abstract: A piezoelectric element driving circuit for driving a plurality of piezoelectric elements disposed in a plurality of head units is disclosed, that comprises a plurality of power amplifiers for driving the plurality of head units, a plurality of flexible flat cables for connecting the plurality of head units and the plurality of power amplifiers, and a drive waveform signal generating circuit for supplying a drive waveform signal to the plurality of head units, wherein each of the plurality of head units has a switch device for supplying a piezoelectric element current to the plurality of piezoelectric elements, wherein the plurality of power amplifiers are disposed corresponding to the plurality of head units, the plurality of power amplifiers supplying a drive waveform signal that is input from the drive waveform signal generating circuit to the plurality of power amplifiers so as to drive the plurality of head units.

Abstract: A linear actuator is an actuator for directly driving (moving) a slider. The linear actuator has an actuator unit constituted by the slider and an actuator body on which the slider is movably provided for linear movement. The actuator body has a base, a vibrating element for moving the slider, two rollers to movably support the slider, pushing means for pushing the vibrating element into contact with the slider, and a conducting circuit for conducting each of electrodes of the vibrating element by selecting a conducting pattern to each of the electrodes. Grooves are respectively formed in outer circumferential surfaces of the rollers, and the slider is arranged inside each of the grooves.

Abstract: RD-28,709 22An ultrasonic transducer device comprising: an ultrasonic transducer array micromachined on a substrate; flexible electrical connections connected to the transducer array; and a body of acoustically attenuative material that supports the substrate and the flexible electrical connections. The acoustic backing material may contain additional features, such as tabs or notches, for use in positioning the transducer on fixtures during manufacturing or positioning the transducer within a housing during final assembly. Tabs or other features that are used only during manufacturing may be subsequently removed from the device. The MUT device itself may also be thinned so as to provide flexibility as desired. The backing material is preferably matched in acoustic impedance to the silicon wafer so as to prevent reflection at the interface of any acoustic energy propagating rearward, i.e., in the direction away from the device front surface.

Abstract: A spark plug 100 has a glaze layer 2d formed on a surface of an alumina based insulator 2 contains 1 mol % or less of a Pb component in terms of PbO. The glaze layer 2d comprises 35 to 55 mol % of a Si component in terms of SiO2; 15 to 35 mol % of a B component in terms of B2O3; 5 to 20 mol % of a Zn component in terms of ZnO; 0.5 to 20 mol % of a Ba component in terms of BaO; and 10 to 15 mol % in total of at least one alkaline metal component of Na, K and Li, in terms of Na2O, K2O and Li2O, respectively.

Abstract: The present application is to provide a spark plug where a marking layer 2m under a glaze layer 2d can form a color stably, even if the Pb amount is decreased in the glaze layer. The glaze layer 2d is formed on an insulator 2 of the spark plug, and the marking layer 2m is formed under the glaze layer 2d. The glaze layer 2d contains, e.g., 1 to 25 mol % of a Zn component in terms of Zno and 5 mol % or lower, e.g., 1 mol % or lower of a Pb component in terms of PbO. On the other hand, the marking layer 2m is adjusted in kinds and amounts of metallic element components in such manners that a tint seen through the glaze layer 2d is 3 or lower in brightness specified by JIS:Z8721 as well as 3 or lower in chroma specified by JIS:Z8721, or 4 or lower in the brightness specified by JIS:Z8721 as well as 2 or lower in the chroma specified by JIS:Z8721.

Abstract: A noble metal chip of which one end is welded to an earth electrode by laser has a sectional area of not less than 0.12 mm2 and not more than 1.15 mm2 at the other end. A length from the surface of the earth electrode to the top surface of the noble metal chip is not less than 0.3 mm and not more than 1.5 mm. An outer surface of the fused junction layer obtained by laser welding between the noble metal chip and the earth electrode has a concave surface, wherein the slope on the plane including the axis of the noble metal chip is curved with a radius R.

Abstract: Row lines include a layer of semiconductive material, conductive material over the layer of semiconductive material, and a passivation layer over the conductive material. The passivation layer contacts a dielectric layer that underlies the semiconductive layer of an emission device at locations that are laterally adjacent to edges of the layer of semiconductive material. One or more pixel openings are defined through the passivation layer, the conductive material, and the underlying semiconductive grid. At least one emitter tip may be exposed through each of the passivation layer, the conductive material, and the layer of semiconductive material. Such row lines may be included in field emission arrays and field emission devices.

Abstract: The present invention provides an electron emitting device including electrodes disposed with a space therebetween on a surface of a substrate, a carbon film disposed between the electrodes and connected to one of the electrodes, and a gap disposed between the carbon film and the other electrode. In the gap, the distance between the edge of the carbon film connected to one of the electrode and the edge of the other electrode at an upper position apart from the surface of the substrate is smaller than that at the surface of the substrate. The present invention also provides an electron source and an image display device each including the electron emitting device.

Abstract: An electron gun assembly of a color cathode ray tube emits at least one electron beam having an oblong cross-sectional shape extending substantially in the horizontal direction, and emits three electron beams in a substantially non-convergent state toward the central portion of a phosphor screen. A deflection device comprises an auxiliary magnetic field generator for generating a quadrupole magnetic field component which focuses the electron beam with an oblong cross section more heavily in the horizontal direction than in the vertical direction. The auxiliary magnetic field generator is located in a given region in a tube-axis direction in which the horizontally deflecting coil is located.

Abstract: An electron emitting device comprising: a pair of conductors opposed to each other on a substrate; and a pair of deposition films having carbon as a main component which are respectively connected to the pair of conductors and disposed with a gap therebetween. The deposition film contains sulfur in a range of not less than 1 mol % and not more than 5 mol % as a ratio to carbon.

Abstract: To provide a voltage application structure that is electrically stable and a display apparatus using the voltage application structure, while reducing the size, thickness, and cost of the display apparatus. A through hole structure is formed in the vicinity of a cylindrical hole established in a rear plate in advance. The through hole structure is electrically connected to lead wiring led to the outside from an anode electrode through a conductive elastic structure. A voltage to the anode electrode is applied to the through hole structure on the atmosphere side, and thus the voltage is applied to the anode electrode through the vacuum side of the through hole structure, the elastic structure, and the lead wiring. Vacuum hermeticity is maintained by filling the hole of the through hole structure with frit. Also, low-voltage wiring that is connected to the ground and regulates a potential is arranged around the through hole structure.

Abstract: Improved field emission display includes a buffer layer of copper, aluminum, silicon nitride or doped or undoped amorphous, poly, or microcrystalline silicon located between a chromium gate electrode and associated dielectric layer in a cathode assembly. The buffer layer substantially reduces or eliminates the occurrence of an adverse chemical reaction between the chromium gate electrode and dielectric layer.

Abstract: An evacuated cavity is hermetically sealed between a baseplate and faceplate of a flat panel display. Melting a glass powder, or frit, on the perimeter of the viewing area forms the hermetic seal. After melting the frit, a first fluid is circulated through the cavity to speed cooling. To further expedite the cooling of the flat panel display, a second fluid flows externally along the contour of the flat panel display to insure that the cooling is uniform and thereby avoid thermal shock.

Abstract: Organic EL device including a plurality of data electrode lines on a substrate, a plurality of scan electrode lines perpendicular to the data electrode lines, and an organic EL layer between the plurality of data electrode lines and the plurality of scan electrode lines, wherein each of the data electrode lines is patterned, and divided into three electrode lines, for scanning three pixel groups at a time.

Abstract: An organic electroluminescent device comprises a pair of electrodes, and a layer structure provided between the pair of electrodes and including a charge transport layer capable of transporting electrons or holes and an emission layer comprising a major proportion of an organic material capable of emitting light on application of a voltage thereto via the pair of electrodes. The organic material undergoes concentration quenching and the emission layer has a thickness of 4 nm or below. The emission layer may be made of an electroluminescent organic material, which has a fluorescent lifetime shorter than an organic material present in the charge transport layer.

Abstract: An OLED device includes a substrate; an OLED having a first electrode formed over the substrate, a layer of organic light emitting material formed over the first electrode, and a second electrode formed over the layer of organic light emitting material to define a light emitting area, wherein the light emitted by the OLED experiences undesirable waveguiding in the device; and a topographical feature located within the light emitting area for disrupting the waveguiding, whereby the light emitting efficiency of the light emitting area is improved.

Abstract: An organic electroluminescence device having an anode structure on the lower surface which is effective for taking out light efficiently from the cathode on the upper surface in which the organic electroluminescence device comprises an anode, a cathode and an organic layer put between both of them. The organic layer contains an organic light emitting layer that emits light by re-combination of holes supplied from the cathode A and electrons supplied from the cathode. The cathode comprises a laminate structure of an electron injecting metal layer, and a transparent conductive layer ultra thin film which is basically light permeable. The anode contains a metal belonging to the group V or group VI of the periodical table to at least a portion in contact with the organic layer and is basically light reflective. The anode metal is selected from chromium, molybdenum, tungsten, tantalum and niobium. The anode metal has a work function of 4.8 eV or lower.

Abstract: In a display device in which a light emitting layer is interposed between a first electrode and a second electrode, and at least one of the light emitting layer and one of the first and second electrodes from which light is extracted functions as a cavity portion of a cavity structure for resonating light generated in the light emitting layer, the peak wavelength of internal emission spectrum inside the light emitting layer and the peak wavelength of multiple interference filter spectrum by the cavity portion are shifted from each other to adjust the RGB balance in the luminance variance under the existence of a view angle by adjusting that shift value.

Abstract: An active matrix organic light-emitting device and fabricating method thereof is provided. A switching device is formed over a substrate and then an insulating layer is formed over the substrate to cover the switching device. Thereafter, a contact opening is formed in the insulating layer to expose a portion of the switching device. An anode layer is formed over the insulating layer and the exposed surface of the contact opening. A planarization layer is formed in the contact opening. A light-emitting layer is formed over the anode layer and the planarization layer. Finally, a cathode layer is formed over the light-emitting layer. By forming a planarization layer inside the contact opening, the chance of having an electrical short-circuit between the anode layer and the cathode layer is minimized.

Abstract: An electroluminescent lamp (EL lamp) is formed by stacking a light-transmitting electrode-layer, an adhesive synthetic resin layer, a luminescent layer formed of the synthetic resin layer with phosphor particles fixed uniformly, a dielectric layer and a back electrode-layer on a transparent substrate sequentially. By this structure, a uniform EL lamp having improved brightness can be produced. A method for manufacturing the EL lamp includes following steps for fixing the phosphor particles in the synthetic resin layer uniformly. (1) sinking the phosphor particles in the synthetic resin layer by heating and pressing, after spraying the phosphor particles. (2) blowing the phosphor particles to the synthetic resin layer with heated air. As a result, the phosphor particles are uniformly fixed in the synthetic resin layer having uniform thickness.

Abstract: A plasma display panel comprises a front glass substrate and a back glass substrate. A plurality of row electrode pairs regularly arranged in a column direction, each extending in a row direction to form a display line, and a dielectric layer covering the row electrode pairs are provided on an inner surface of the substrate. A plurality of column electrodes are provided on an inner surface of the substrate, and regularly arranged in the row direction, each extending in the column direction to intersect with the row electrode pairs to form discharge cells in a discharge space at the intersections. A recess groove is formed in a portion of the dielectric layer opposite a discharge gap between paired row electrodes constituting the row electrode pair, so that the dielectric layer has a thickness in the portion opposite the discharge gap smaller than that in portions on both sides of the portion opposite the discharge gap.

Abstract: A plasma display panel (PDP), consisting of a front panel (10) equipped with display electrodes (8) and a rear panel (4) equipped with address electrodes (3), that displays an image by causing discharge in a small discharge space formed between the two panels; wherein there are provided two layers of protective films (5, 6), made of metallic oxide, covering the dielectric layer (7) installed on the front panel (10); the outer, upper layer (6) being formed into a layer of material with a specific surface area of 20 m2/g or more and a film thickness of 1 &mgr;m or less, exhibiting a high discharge characteristic; and the inner, lower layer (5) being formed into a layer of material with a specific surface area of 10 m2/g or less and a film thickness of 1 &mgr;m or more, exhibiting a low water-adsorption characteristic.

Abstract: The high-pressure discharge lamp (1) comprises a lamp vessel (2) having a wall (3) which is exposed to a wall load of at least 30 W/cm2 during operation of the lamp, and a discharge space (4) in which a electrodes (5a, 5b) are disposed. The discharge space (4) has a filling that comprises mercury, argon, and halides (not fluoride) of tin and indium, to which filling an alkali halide is added, the alkali being potassium, rubidium, or cesium, and the halide being chlorine, bromine, or iodine. The high-pressure discharge lamp (1) according to the invention has an improved resistance to corrosion and to crystallization of the quartz glass wall (3) because of shielding or spacer means (8) by which a direct contact between electrode rods (30) and the wall (3) of the lamp vessel (2) is counteracted.

Abstract: In a circuit and method of controlling the horizontal and vertical screen sizes of a cathode ray tube (CRT) monitor, the circuit includes a horizontal screen size compensation circuit, an east-west correction signal controller, a vertical screen size compensation circuit, and a vertical screen size correction signal controller. The horizontal screen size compensation circuit compares the voltage value of a horizontal screen size correction signal with the voltage value of a horizontal reference voltage to obtain first and second horizontal current signals. In response to a horizontal control signal, the horizontal screen size compensation circuit outputs a horizontal correction current signal obtained by subtracting a horizontal variable current signal from the first horizontal current signal.

Abstract: This invention is directed to crossed-field devices such as magnetrons to an inductive insert for a magnetron that compensates for the natural increase in cavity inductance with temperature which causes the output frequency to decline with increasing temperature.

Abstract: A lamp assembly configured to inductively receive power from a primary coil. The lamp assembly includes a lamp circuit including a secondary and a lamp connected in series. In a first aspect, the lamp circuit includes a capacitor connected in series with the lamp and the secondary to tune the circuit to resonance. The capacitor is preferably selected to have a reactance that is substantially equal to or slightly less than the reactance of the secondary and the impedance of the lamp. In a second aspect, the lamp assembly includes a sealed transparent sleeve that entirely encloses the lamp circuit so that the transparent sleeve is fully closed and unpenetrated. The transparent sleeve is preferably the lamp sleeve itself, with the secondary, capacitor and any desired starter mechanism disposed within its interior.

Abstract: A rapid assembled and detached structure of a lamp comprises a retaining seat, a lamp seat and a connector. The receiving hole is formed in the retaining seat. A bottom end of the receiving hole is mounted with a conductive receptacle. An outer side of the retaining seat is installed with an embedding hole. A lamp seat at a lower end of the retaining seat. A center of the lamp seat has a locating hole. After the retaining seat is installed in the locating hole of the lamp seat. The embedding hole of the retaining seat is communicable to the through hole of the lamp seat. A connector is received in the retaining seat. A bottom end of the connector has a conductive plug capable of being inserted into the receptacle. A receiving groove is formed on the connector and a reed is locked to the receiving groove.

Abstract: An exhaust system for use with a microwave excited ultraviolet lamp system is provided to receive cooling air emitted from the lamp system and to contain and direct the cooling air so as not to contact a substrate being irradiated with ultraviolet light. A lens, such as a quartz lens, is supported by the exhaust duct to transmit the ultraviolet light emitted from the lamp system toward the substrate.

Abstract: The invention relates to a light emitting system and transmitting apparatus and receiving apparatus to be used in the light emitting system. The transmitting apparatus has a first transmitting circuit that transmits a light emission data signal for setting a light emission condition by a signal other than light on a wireless basis and a second transmitting circuit that transmits a light emission start signal for starting light emission by light on a wireless basis. The receiving apparatus is either adapted to be connected to an illuminating apparatus that emits illuminating light or having such an illuminating apparatus.

Abstract: An ionizing discharge device operating arrangement wherein initiation of discharges in for example a dielectric barrier discharge device is accomplished by a short circuit shunting of the charged electrodes of the device. A cycle of slow charging of the device inter-electrode capacitance followed by a high-speed electrode-shunting event is used for continuing operation of the device. In this operating cycle energy storage is accomplished by the inter-electrode capacitance of the device without causing ionization by way of a controlled rate of capacitance charging accomplished without assistance of additional storage elements. Desirable fast pulse rise-time energization characteristics are achieved in the dielectric barrier discharge device by way of using a fast, preferably electronic, switch in the shunting operation and maintaining the discharge in a circuit of relatively low inductance and minimal lead lengths.

Abstract: The invention relates to the supply of power to a driver circuit (V) for a switching transistor (T) in an operating circuit, in particular for lamps. The supply is provided via a pump circuit with a potential isolation capacitor (C2), two rectifier diodes (D1, D2) and an energy-storage capacitor (C1), and is independent of the reference ground potential of the switching transistor (T).

Abstract: An inverter circuit includes an input section configured to receive voltage from a voltage source and to input the voltage to the circuit. A switching network is connected to receive the input voltage from the input section. A controller controls operation of the switching network and load connections are connected to the resonant switching circuit. A variable capacitance network is series-connected to the load connection to provide a variable capacitance during circuit operation. A method includes passing a supplied voltage to a switching network which is controlled by a controller, and which delivers a lamp voltage to a lamp. A voltage in a capacitor series-connected to the lamp is clamped at predetermined levels, acting to remove a fixed capacitor from the circuit or at least a portion of a cycle of operation of the circuit, wherein an effective variable circuit capacitance is obtained by operation of the clamping action.

Abstract: Disclosed is a light source device capable of minimizing leakage of power supplied to a lamp of a liquid crystal display device. A plurality of power supply lines is extended between the lamp for generating light and an inverting board for receiving the power source from the outside to supply power to the lamp. The plurality of the power supply lines is coated with a shrinkable tube to be spaced apart from one another. Accordingly, the leakage of the power source that is generated from the first, second, third and fourth power supply lines due to a coupling phenomenon thereof is minimized.

Abstract: It is an object to provide a xenon discharge lamp lighting device with few or no lamp startup lighting failures, even when a xenon discharge lamp is near the end of its useful life. In the xenon discharge lamp, when a lamp voltage increases, from the ending point of the rush current supply time period, occurring upon starting a xenon discharge lamp lighting igniter, for a preset specified time T, the input power is increased in accordance with the lamp voltage increase amount, whereby constant power control is provided thereafter.

Abstract: The invention concerns an electronic device, or dimmer, for regulating the power supply applied to a load (4), the device comprising an insulated gate bipolar transistor or IGBT (1), the IGBT (1) having a first operating mode in which it is off and does not allow any current to pass, a second operating mode in which it is on and the current passing therein is substantially limited by characteristics of an external circuit connected to it, and a third linear region operating mode, in which the current passing therein is limited by a value proportional to the gate voltage, the IGBT (1) being connected to a rectifier bridge (2), apt to be connected to a load (4) and to a mains (5) connected in series to each other, the device further comprising a processing and controlling unit, the device being characterised in that said processing and controlling unit includes digital processing means (6, 7) and in that the device comprises ramp generating means (17, 18) driven by said processing and controlling unit, apt to g

Abstract: A parabolic modulation circuit multiples a horizontal parabolic signal and a vertical modulation signal together, to amplitude-modulate the horizontal parabolic signal using the vertical modulation signal, and modulates the phase of the horizontal parabolic signal on the basis of the vertical modulation signal, to output the modulated horizontal parabolic signal to a correction current output amplifier. When an NS pincushion distortion on a screen of a CRT is asymmetrical, a horizontal parabolic signal generation circuit is so set as to generate an asymmetrical horizontal parabolic signal. A gull-wing distortion can be corrected by adjusting the value of n in an n-th power waveform generator in the horizontal parabolic signal generation circuit.

Abstract: In order to quickly stop vibration of a vibrator of a vibrator controlling circuit, according to the present invention, an intermittent signal is generated by a spring vibration control integrated circuit, a switching element is turned on/off based on the intermittent signal from the spring vibration control integrated circuit, an intermittent electric current is supplied to a spring vibrator by switching of the switching circuit and the spring vibrator is vibrated. When vibration of the spring vibrator is stopped, a signal opposite to that when the spring vibrator is vibrated is applied from the spring vibration control integrated circuit to the switching element so as to cause the spring vibrator to generate a force to attenuate vibration and to stop the vibrator from vibrating.

Abstract: Available torque output from a battery-powered traction motor system in a vehicle is estimated, wherein the system includes a high-voltage battery coupled to a traction motor by an inverter, wherein the inverter is controlled in response to a torque/speed command within an inverter controller, and wherein the system further includes a DC-to-DC converter coupled to the high-voltage battery to provide a reduced voltage to charge a low-voltage battery. Battery operating conditions of the high-voltage battery are determined including available battery power and battery voltage. Traction motor operating conditions including a flux linkage and other electrical parameters are determined. The battery information including voltage, current, and internal resistance is transformed into synchronous coordinates. An available quadrature current corresponding to the maximum available torque is determined in response to the traction motor operating conditions and the battery voltage in the synchronous coordinates.

Abstract: A high phase order induction machine drive system is disclosed. This has an inverter system for the synthesis of a plurality of phases of alternating current output, and a N-phase induction motor (N is greater than 3). The inverter system has N terminals, numbered from 1 to N. Each motor phase is electrically connected to a pair of inverter terminals. One connection is made to a first inverter terminal and the other connection is made to a second inverter terminal. The number of inverter terminals (in order of electrical phase angle) between the first terminal and the second terminal is S+1, where S is the skip number). The phase angle difference between the pair of inverter terminals to which each motor phase is connected is identical for each motor phase.

Abstract: The invention concerns a method for regulating the rotation speed, of a motor with which a digital rotation speed controller is associated and which, during operation, furnishes an actual-value signal for the rotation speed in the form of a rotation speed frequency signal, toward a target rotation speed setpoint defined in the form of a setpoint frequency signal, having the following steps: in a first time segment, a first numerical frequency value that characterizes the rotation speed of the motor is ascertained from the rotation speed frequency signal; in a second time segment that is substantially simultaneous with the first time segment, a second numerical frequency value that characterizes the frequency of the setpoint frequency signal is ascertained from the setpoint frequency signal; by means of the first and second numerical frequency values, the rotation speed of the motor is regulated in the digital rotation speed controller to a rotation speed that is associated with the setpoint frequency signal a

Abstract: Brake mode switching signal production means detects the number of revolutions per unit time of a rotor according to a change in a positional relationship between motor windings of a plurality of phases and the rotor so as to output first and second brake mode switching signals for selecting either a short brake mode or a reverse brake mode for braking the rotation of the rotor based on the number of revolutions. Control means outputs an energization control signal for controlling energization of the motor windings of a plurality of phases in response to the first and second brake mode switching signals. Thus, it is possible to reduce the braking noise and the stopping time.

Abstract: A drive control apparatus comprises a drive signal supply unit for generating, when a power-supply voltage is supplied to the drive control apparatus, a drive signal, which is used for driving a load from this power-supply voltage, and for supplying this generated drive signal to an output port of a microcomputer, a drive signal stop unit for stopping, when the power-supply voltage has a value that is equal to or less than a predetermined value, the drive signal supply unit from supplying the drive signal, and a drive signal delay unit for delaying the drive signal outputted by the drive signal supply unit.

Abstract: In order to prevent stator windings and power amplification semiconductor devices from being damaged by heat when a rotor is locked, a current feed term setting circuit that maintains an output signal circuit of a logical circuit in “OFF” state to completely cut off currents to the stator windings, when the number of repetitions of “ON” and “OFF” states of the output signal circuit reaches a predetermined value, is added to a driving IC of a control circuit for a brushless DC motor equipped with a protective circuit.

Abstract: A holder of a vehicle blower motor device includes a holder body for holding a motor, a disk-shaped coupling member, and a cover plate. The holder body, the coupling member, and the cover plate define an air duct. Air is introduced to the interior of the holder body through the air duct form the inlet to cool the motor. A cylindrical blocking wall surrounds the inlet. The blocking wall protrudes from the lower surface of the coupling member, which faces the air duct, toward the interior of the air duct. The blocking wall prevents droplets collected on the inlet from reaching a boundary between the cover plate and the coupling member. As a result, a blower motor device having an improved water resistance.

Abstract: A modular multi-axis robot that can be configured to operate with two, three, four, five or six axes of movement and in various combinations of rotational and translational motion. The modules that make up the robot are fully detachable, interchangeable and are functionally independent with respect to each other. This allows the robotic apparatus to provide a flexible and custom solution for many different applications.