Abstract: A drawer cart with in-mold labels includes a cart and a plurality of drawers made by injection molding. Each drawer has a housing compartment opened upward and a display surface. The drawers are slidably mounted onto the cart with the display surfaces exposed outwards and can be partially drawn away from the cart to expose the housing compartment. The display surface contains an in-mold label formed during the injection molding. The in-mold label has patterns for indication and visual aesthetic, and also facilitating classification of goods held in the drawers. The patterns on the in-mold label can be designed differently in response to varying display surfaces and can be combined to form a whole pattern to enhance total design sense and meet use requirements.

Abstract: A combination drawer includes a drawer body, at least one dividing unit mounted in the drawer body, and at least one retractable member slidably mounted on the dividing unit. Thus, the retractable member co-operates with the dividing unit to fit the length of the drawer body so that the total length of the retractable member and the dividing unit can be adjusted to fit the drawer body of different sizes, thereby enhancing the versatility of the combination drawer.

Abstract: A combination drawer includes a drawer body, two support bars located at two opposite ends of the drawer body, at least one dividing unit mounted in the drawer body and disposed between the support bars, at least two upper retractable members retractably mounted on two opposite ends of the dividing unit and connected with the support bars respectively, and at least two lower retractable members retractably mounted on the two opposite ends of the dividing unit and each abutting an inner side of the drawer body. Thus, the lower retractable members are movable relative to the dividing unit to co-operate with the dividing unit so as to fit the length of the drawer body, such that the total length of the dividing unit and the lower retractable members can be adjusted to fit the drawer body of different sizes.

Abstract: In one embodiment, the solid-state lighting apparatus includes a solid-state light source. The solid-state light source may include a first side and a second side opposite the first side, with the first side including at least one solid-state lighting element. The solid-state lighting apparatus may also include a junction box. The junction box may be positioned at least partially above the solid-state light source, proximate the second side of the solid-state light source. The solid-state lighting apparatus may further include a heat sink. The heat sink may be coupled to the junction box and thermally coupled to the solid-state light source.

Abstract: There is herein described a lamp having a light-transmissive envelope, a tungsten-halogen capsule and a coating disposed on the surface of the light-transmissive envelope or doped in the light-transmissive material. The light-transmissive envelope may comprise a light-transmissive material. The tungsten-halogen capsule can be positioned inside the light-transmissive envelope.

Abstract: A spark plug (20) includes a center electrode (24) and a ground electrode (22). The electrodes (22, 24) include a core (26) formed of a copper (Cu) alloy and a clad (28) formed of a nickel (Ni) alloy enrobing the core (26). The Cu alloy includes Cu in an amount of at least 98.5 weight percent, and at least one of Zr and Cr in an amount of at least 0.05 weight percent. The Cu alloy includes a matrix of the Cu and precipitates of the Zr and Cu dispersed in the Cu matrix. The Ni alloy of the clad (28) includes Ni in an amount of at least 90.0 weight percent. The Ni alloy also includes at least one of a Group 3 element, a Group 4 element, a Group 13 element, chromium (Cr), silicon (Si), and manganese (Mn) in a total amount sufficient to affect the strength of the Ni alloy.

Abstract: A discharge electrode array for a silicon-based thin film solar cell deposition chamber is provided, relating to solar cell technologies. The discharge electrode array includes a signal feed component having a rectangular-shaped end, a flat waist corresponding to a feed-in port located in a hallowed rectangular area on a center region of a cathode plate having a shielding cover, connecting a feed-in power supply signal by surface contact. The electrode array includes at least a set of cathode plates and an anode plate, with two cathode plates sharing or surrounding one anode plate. Uniform large area and stable discharge driven by the RF/VHF power supply signal can be achieved, and the standing wave and the skin effect can be effectively removed. The production efficiency can be improved and the cost can be reduced.

Abstract: Disclosed are a semiconductor apparatus and a manufacturing method thereof. The manufacturing method of the semiconductor apparatus includes: forming a semiconductor chip on a semiconductor substrate; adhering a carrier wafer with a plurality of through holes onto the semiconductor chip; polishing the semiconductor substrate; forming a first via hole at the rear side of the polished semiconductor substrate; forming a first metal layer below the polished semiconductor substrate and at the first via hole; and removing the carrier wafer from the polished semiconductor substrate.

Abstract: An illumination device includes a light-emitting device and a diffusion member. The light-emitting device has a plurality of light-emitting elements that emit light having a peak wavelength in a wavelength region of 380 to 420 nm, a first phosphor that emits visible light having a peak wavelength in a wavelength region of 560 to 600 nm, a second phosphor that is excited by ultraviolet ray or short-wavelength visible light and emits visible light in complementary color relationship with the visible light emitted by the first phosphor, and a light-transmitting member that covers the plurality of light-emitting elements and contains the first phosphor and the second phosphor dispersed therein. The diffusion member diffuses at least a part of the light emitting from the light-emitting device.

Abstract: Disclosed is a phosphor having a formula of M(M?1-y-zEuyMnz)(M?1-xPrx)(PO4)2. M is a monovalent metal element selected from Li, Na, K, or combinations thereof. M?, Eu, and Mn are divalent metal elements, and M? is selected from Ca, Sr, Ba, Mg, Zn, or combinations thereof. M? and Pr are trivalent metal elements, and M? is selected from Sc, Y, La, Lu, Al, Ga, In, or combinations thereof. 0?x?0.2, 0?y?0.1, 0?z?0.2, and x+y+z?0.

Abstract: An organic light emitting diode (OLED) display includes: a substrate; an organic light emitting element on the substrate; a thin film encapsulation layer covering the organic light emitting element; and a viewing angle compensation layer on the thin film encapsulation layer, wherein the viewing angle compensation layer corresponding to a pixel of the organic light emitting element has a plurality of sub-viewing angle compensation members. Accordingly, in the organic light emitting diode (OLED) display according to an exemplary embodiment, the viewing angle compensation layer is disposed on the thin film encapsulation layer such that optical characteristic changes such as the luminance change and the color change according to the viewing angle may be minimized or reduced.

Abstract: A composition is provided, including one or more quantum dots and at least one organic emitter. Further, a formulation including the composition, a use of the formulation and a device comprising the composition or formulation is provided.

Abstract: The present invention provides a glass-sealed LED lamp which includes a mounting substrate, an LED chip mounted on the mounting substrate, a glass sealing body, and a glass bonding portion bonding the LED chip to a portion of a lower surface side of the glass sealing body. A clearance between a lower surface of the glass sealing body and an upper surface of the mounting substrate side, which causes total reflection at an interface between the glass sealing body and the clearance, is formed outward of the portion of the lower surface side of the glass sealing body.

Abstract: A discharge tube 10 includes first electrode 12, second electrode 14 and third electrode 16 which are arranged in parallel, airtight outer enclosure 22 including first tubular body 18 sandwiched between first electrode 12 and second electrode 14, and second tubular body 20 sandwiched between second electrode 14 and third electrode 16. Through-holes 24 is formed in second electrode 14 and allows internal spaces of first tubular body 18 and second tubular body 20 to communicate with each other. On first electrode 12 and third electrode 16, discharge electrode portions 26 are formed which protrude toward a center of airtight outer enclosure 22 and are disposed opposite to each other with discharge gap 28 provided in between, and discharge gas is filled in airtight outer enclosure 22. The discharge electrode portions 26 are inserted and arranged in through-hole 24 of second electrode 14.

Abstract: Disclosed is a towed vehicle electrical connector that operably routes onboard battery power within the vehicle to exterior lighting when disconnected from a towing vehicle and when ambient light conditions drop below a given threshold. The device comprises an electrical module connectable to a trailer lead vehicle electrical connector, wherein the module includes an electrical circuit to route onboard battery power into a relay and through the exterior lights and to ground. The relay is controlled by a light sensitive switch, which monitors ambient light and allows the battery to energize the trailer exterior lights. The device provides a trailer user with a twilight lighting system, which illuminates an area about the vehicle for increased security and low light visibility.

Abstract: In embodiments of the present invention improved capabilities are described for systems and methods that employ a control component and/or power source integrated in an LED based light source to control and/or power the LED light source wirelessly. In embodiments, the LED based light source may take the form of a standard light bulb that plugs into a standard lighting socket or fixture.

Abstract: The present invention discloses a surface feed-in electrode structure for thin film solar cell deposition, relating to solar cell technologies. The surface feed-in electrode structure uses a signal feed-in component with a flat waist and a semicircular feed-in end to connect the signal feed-in port by surface contact. The signal feed-in port is located in a hallowed circular area of a center of the backside of a cathode plate, and feeds in an RF/VHF power supply signal. An anode plate is grounded. The cathode plate is insulated with a shielding cover, and a through-hole is configured on the shielding cover. The effects include that, by using the surface feed-in at the center of the electrode plate, the feeding line loss of single-point or multi-point feed-in configurations can be overcome. Uniform large area and stable discharge driven by the RF/VHF power supply signal can be achieved, and the standing wave and the skin effect can be effectively removed.

Abstract: Provided is a charged particle beam apparatus, which can emit a stable electron beam, having high brightness and a narrow energy width. The charged particle beam apparatus comprises a field emission electron source, electrodes for applying an electric field to the field emission electron source, and a vacuum exhaust unit for keeping the pressure around the field emission electron source at 1×10?8 Pa or less. The apparatus is so constituted as to use such one of the electron beams emitted as has an electron-beam-center radiation angle of 1×10?2sr or less, and to use the electric current thereof, the second order differentiation of which is negative or zero with respect to the time, and which reduces at a rate of 10% or less per hour. The charged particle beam apparatus further comprises a heating unit for the field emission electron source, and a detection unit for the electric current of the electron beam.

Abstract: A liquid-cooled light emitting diode (LED) bulb which includes a base, a shell connected to the base forming an enclosed volume, and a plurality of LEDs attached to the base and disposed within the shell. The LED bulb also includes a volume of thermally-conductive liquid held within the enclosed volume. A scavenger element comprising a scavenger material is attached to the base and is exposed to the thermally-conductive liquid. The scavenger material is configured to capture contaminants in the thermally-conductive liquid.

Abstract: A control apparatus for at least one circuit arrangement for operating fluorescent lamps and LEDs. Switching can occur between operation of the fluorescent lamps and LEDs via a control input.

Abstract: A ballast system regulates the supply of power to an illuminant. The ballast system has a controller coupled to a power converter. The controller has a processor and a memory communicatively coupled with a bus. The memory comprising a lighting control system, and the processor is configured to execute the lighting control system to cause the power converter to increase or decrease power supplied to an illuminant.

Abstract: Driver circuits (1) for driving load circuits (2) comprising first and second light circuits (21-22, 71-72) are in first/second modes for input voltages having first/second voltage amplitudes, the second voltage amplitudes being larger than the first voltage amplitudes. The first light circuits (21, 71) are on in the first and second modes. The second light circuits (22, 72) are off in the first modes and are on in the second modes. A control circuit (21, 71) in dependence of the modes to extend control. These currents may get smaller current amplitudes in higher modes. Light outputs of the first light circuit (21, 71) may get smaller in higher modes. A total light output of all light circuits (21-22, 71-72) may remain substantially constant during all modes.

Abstract: A lighting system according to embodiments includes a first light source, a second light source, a first lighting circuit, a second lighting circuit, a first optical sensor; and a control circuit. The first light source is configured to emit light a half-value width of which is 100 nm or more. The second light source is configured to emit light the half-value width of which is less than 100 nm. The first lighting circuit is configured to light the first light source. The second lighting circuit is configured to light the second light source. The control circuit is configured to perform a lighting control of the first lighting circuit on the basis of a detection value of the first sensor, and perform a lighting control of the second lighting circuit on the basis of a value which is predetermined when operating the first sensor.

Abstract: Electronic circuitry for color-mixing in an LED light fixture during AC power dimming is disclosed to achieve adjustable color temperature. According to one embodiment, a dimmable LED light fixture has first, second, and third LED light sources, the first and second LED light sources producing white light, the third LED light source producing colored light, the LED driver configured to power the LED light sources by providing a single-channel variable-DC current source having two output terminals, and a current regulator for maintaining the current in the third LED light source path substantially constant as the LED driver output current is decreased when the AC power is reduced by the dimmer module, thereby altering the color of the light produced by the combination of the LED light sources.

Abstract: The circuit eliminating threshold voltage differences between backlight LED strings includes a voltage supply input, a number of first switching units, and a number of LED strings. The LED strings are connected to each other in parallel, and one end of each LED string is connected to the voltage supply input and the other end thereof is connected to the corresponding first switching unit. The constant current controller includes a constant current source for supplying a constant current to each LED string, a current detector for detecting a working current of each LED string, a comparator for comparing the working current of each LED string and the constant current, and outputting a comparing result, and a square wave generator for outputting driving signals of different frequencies each which is capable of driving the corresponding LED string to work at the corresponding frequency.

Abstract: An electronic ballast includes a power factor corrector having an input side for receiving an AC input voltage from a voltage source, and including first and second power switches connected in series across an output side. Each of the first and second power switches is operable based on a corresponding one of a first and second control signals in one of an ON-state and an OFF-state. The power factor corrector is operable to output at the output side a boosted DC voltage output corresponding to the AC input voltage in response to operation of the first and second power switches. A buck circuit receives the boosted DC voltage output from the power factor, and is operable based on the boosted DC voltage output to output an AC voltage output in the form of an AC square wave signal to a high intensity discharge lamp.

Abstract: An illumination apparatus including: a power supply circuit which outputs a DC power obtained by rectifying an AC voltage and stepping up the rectified voltage; a light source unit having semiconductor light emitting elements turned on by the DC power; and a housing formed of a conductive material that is grounded through a ground path and on which the power supply circuit and the light source unit are mounted. When one of power feed lines is cut off, the light emitting elements are supplied with an AC power from an AC power source through the ground path and a stray capacitance formed between the light source unit and the housing, and a forward voltage of the light emitting elements has a light emission level hardly recognizable.

Abstract: An isolated flyback converter for an LED driver may include: (1) A snubber circuit configured to be connected to the primary side of a transformer. (2) A switching unit configured to have a source terminal and a drain terminal and configured to be turned on or off. (3) A control unit configured to detect a first input signal proportional to a fluctuation in the power supply voltage, detect a second input signal when the switching unit is turned off, generate a signal inversely proportional to the maximum value of the first input signal and multiply the generated signal to the second input signal, and control a peak current of the switching unit to be proportional to the multiplication result of the signal inversely proportional to the maximum value of the first input signal and the second input signal such that a secondary-side current of the transformer is maintained constant.

Abstract: A pixel circuit related to an organic light-emitting diode (OLED) is provided. When signals having appropriate operating waveforms are supplied, the circuit configuration (6T1C) of the pixel circuit keeps a current flowing through an OLED unchanged when the Vth shift of the TFT for driving the OLED changes and eases the impact of a power supply voltage Vdd on the current. Thereby, the luminance uniformity of an OLED display adopting the OLED pixel circuit is greatly improved.

Abstract: A semiconductor device includes a transistor, a light-emitting element, a first wiring, a driver circuit having a function of controlling the potential of the first wiring, a second wiring, a first switch, a second switch, a third switch, a fourth switch, a first capacitor, and a second capacitor. One of a source and a drain of the transistor is connected to the light-emitting element. With this structure, voltage applied between the source and the gate of the transistor can be corrected in anticipation of variations in threshold voltage, so that the current supplied to the light-emitting element can be corrected.

Abstract: A lighting device includes a DC/DC power converter, a controller/processor electrically connected to the DC/DC power converter, a light emitting diode (LED) current control circuit communicably coupled to the controller/processor and electrically connected to the DC/DC power converter, and two or more LEDs comprising at least a first color LED and a second color LED electrically connected to the LED current control circuit. The LED current control circuit provides an on/off signal having a cycle time to each LED in response to one or more control signals received from the controller/processor such that the two or more LEDs produce a blended light having a specified color based on how long each LED is turned ON and/or OFF during the cycle time.

Abstract: A voltage rectifying unit may comprise a first and a second charging unit connected in parallel. The charging units may each comprise a first rectifying diode and a second rectifying diode connected in series. A third and a fourth rectifying diode may be connected in series between the first and the second rectifying diodes and may have a first connecting node therebetween. A first capacitor and a second capacitor may be connected in series between the first and the second rectifying diodes and in parallel with the third and fourth rectifying diodes, and may have a second connecting node therebetween. The nodes of the charging units may be connected to an AC input wave form wherein the voltage rectifying unit may be configured to provide a continuously positive wave form to at least one load connected thereto.

Abstract: An LED illumination system includes a DC power supply, at least two LED illumination lamp sets and at least two power circuits corresponding to the LED illumination lamp sets. The DC power supply provides sufficient electric power for the LED illumination lamp sets and is connected to the LED illumination lamp sets via the power circuits. The invention supplies electric power required by the LED illumination lamp sets via a single DC power supply without an extra DC power supply, hence the cost is lower. Moreover, the DC power supply is located remote from the LED illumination lamp sets, hence high temperature generated by the DC power supply does not affect lighting and lifespan of the LED illumination lamp sets. The hazard of electric shock by inadvertently touching the AC power source while replacing lamps in the LED illumination lamp sets can also be avoided to improve safety.

Abstract: A lighting system according to embodiments includes a first light source, a second light source, a first lighting circuit, a second lighting circuit, a signal input unit, and a control circuit. The first light source has a predetermined color temperature. The second light source has a color temperature which is different from that of the first light source. The first lighting circuit lights the first light source. The second lighting circuit lights the second light source. The signal input unit receives an external signal. The control circuit includes a first light source lighting control cycle which performs a predetermined lighting control of the first light source, and a second light source lighting control cycle which performs a predetermined lighting control of the second light source, controls the first and second lighting circuits so as to start the lighting control.

Abstract: A configuration unit (1) and a method for configuring a sensor (2) comprising a transmitter (4) and a plurality of receivers (6) are provided. The configuration unit is operatively connected to the transmitter and the plurality of receivers, and is adapted to estimate the location of a static element (8) based on a probing signal (5) transmitted by the transmitter and based on a return signal (7) received by the plurality of receivers. The return signal is generated by reflection of the probing signal against the static element. Moreover, the configuration unit is adapted to configure the sensor, for presence detection of a target (9), based on the estimated location of the static element.

Abstract: An LED driver for controlling the intensity of an LED light source includes a power converter circuit for generating a DC bus voltage, an LED drive circuit for receiving the bus voltage and controlling a load current through, and thus the intensity of, the LED light source, and a controller operatively coupled to the power converter circuit and the LED drive circuit. The LED drive circuit comprises a controllable-impedance circuit adapted to be coupled in series with the LED light source. The controller adjusts the magnitude of the bus voltage to a target bus voltage and generates a drive signal for controlling the controllable-impedance circuit. To adjust the intensity of the LED light source, the controller controls both the magnitude of the load current and the magnitude of the regulator voltage. The controller controls the magnitude of the regulator voltage by simultaneously maintaining the magnitude of the drive signal constant and adjusting the target bus voltage.

Abstract: An improved two layer electrode structure is fabricated on a surface. According to one aspect of the invention, the first layer of the electrode structure is designed to provide electrical contact to a fluid electronic material and the second layer of the electrode structure is formed so as to constrain the fluid electronic material in a precise pattern. Alternatively, the second layer of the two-layer electrode structure includes a low surface energy material to further assist in constraining the fluid electronic material to the desired pattern. In another alternative, the first layer of the electrode structure includes a transparent electrode material, that is coupled to an electro-optical device. The second layer of this electrode structure includes a high conductivity material that is coupled to the first layer of the electrode structure in an area not directly over the electro-optical device to improve the conductivity of the transparent electrode structure.

Abstract: A light fixture having a construction enabling on/off operation with a wall-mounted switch in a circuit by itself or with other fixtures and to be upgraded in “plug and play” fashion to operate independently of other fixtures in the circuit or for stepped dimming. Modular construction provides safety and ease of maintenance in that ballasts are replaced without exposure to internal wiring and provides temperature management by isolating temperature-sensitive components from high temperatures while placing the lamps in an enclosure in which temperature is contained to operate efficiently. If passive thermal management is not enough to maximize operating efficiency and/or service life, the fixture is upgradeable in plug and play fashion to active thermal management. Ballast modules can be equipped with a microcontroller for collecting operational data that is harvested and used to optimize switching to evenly age lamps and electronics or determine energy consumption.

Abstract: An electronic device capable of displaying a light pattern in a section of a surface by turning on a light source includes: the light source; a first light-transmissive colored layer provided on the surface and having reflectance and transmittance that peak in a wavelength range of light of a first color; and a second light-transmissive colored layer provided on a path of light that is emitted from the light source and reaches the first light-transmissive colored layer, the second light-transmissive colored layer having transmittance that peaks in a wavelength range of light of a second color different from the first color. The second light-transmissive colored layer has light transmission characteristics adjusted such that light of a desired color exits the section of the surface where the light emitted from the light source reaches when the light source is turned on.

Abstract: A power tool including a motor, light unit, and switch unit for selectively connecting the motor and light unit to a power source. A control module includes a controller coupled to a first electronic switch to control power delivery to the motor based on a position of the switch unit, and to a second electronic switch to control power delivery to the light source based on a position of the switch unit. A timer is configured to keep the light unit illuminated for a predetermined amount of time after the switch unit has been activated or deactivated. The control module also includes a boot circuit with a semiconductor switch that continues to deliver power to the controller and to the light unit when the switch unit is deactivated subsequent to being activated, to enable the light unit to remain illuminated after the switch unit has been deactivated.

Abstract: The disclosure relates to systems and methods for interleaving operation of a standing wave linear accelerator (LINAC) for use in providing electrons of at least two different energy ranges, which can be contacted with x-ray targets to generate x-rays of at least two different energy ranges. The LINAC can be operated to output electrons at different energies by varying the power of the electromagnetic wave input to the LINAC, or by using a detunable side cavity which includes an activatable window.

Abstract: Securing apparatus for at least one electrical furniture drive of a movable furniture part, wherein the securing apparatus prevents the simultaneous opening of moveable furniture parts which are at risk of colliding, wherein the securing apparatus has at least two—preferably three—control connections to which signal lines of sensors of movable furniture parts and/or signal lines of the at least one electrical furniture drive can be detachably fastened, wherein the actuation of the at least one electrical furniture drive of the moveable furniture part can be prevented when there is a risk of it colliding with a further moveable furniture part—which has been moved out of its closed position—by the configuration of the control connections.

Abstract: A driving apparatus for a vibration-type actuator that applies an AC voltage to an electro-mechanical energy conversion element and generates a driving force between a vibration member and a movable member includes a voltage amplitude command unit configured to instruct an amplitude of the AC voltage, a pulse width command unit configured to monotonically increase a pulse width command and a change rate of the pulse width command according to an increase in a voltage amplitude command, and output a pulse width command, and a pulse signal generation unit configured, when a pulse signal that directly or indirectly generates the AC voltage is generated at the same frequency as the AC voltage to apply the AC voltage to the electro-mechanical energy conversion element, to generate a pulse signal having a pulse width corresponding to the pulse width command based on the pulse width command.

Abstract: In a drive device for a railway vehicle, in which regeneration braking force is increased by adding the output voltage of a voltage adjustment device to a DC power source voltage, operation of the current control device is started prior to the start of the power running operation or the regeneration operation of the inverter device, and the operation of the current control device is stopped later than the stopping of the power running operation or the regeneration operation of the inverter device. Thereby, the current control device is surely operated at least during the operation period of the inverter device, so that the output voltage of the voltage adjustment device is adjusted by the current control device, to thereby prevent the over-discharge of the energy storage device at the time of power running operation or the overcharge of the energy storage device at the time of regeneration operation.

Abstract: An estimation section estimates a time period required for a norm of a difference vector between a current flowing to a motor/generator and a command current to attain a threshold level r in each switching mode provisionally set by a mode setting section. A mode determination section determines the switching mode of the longest required time period to be a final switching mode. A drive section controls an inverter to operate in the switching mode determined by the mode switching section.

Abstract: An estimation section calculates estimated currents corresponding to switching modes, which are provisionally set by a mode setting section. A mode determination section determines one of modes, which has a smallest difference between the estimated currents and command currents, to be a final switching mode. A drive section drives an inverter in the switching mode determined by the determination section. The estimation section uses transient-state inductances as coefficients of time differentiation of currents in voltage equations used for estimation of the estimated currents. These are different from steady-state inductances, which are coefficients of multiplication of currents and electric angular velocity.

Abstract: A controller 40 performs a control operation in a cycle based on a carrier frequency fc of a carrier, specifically, at timings corresponding to the peaks and troughs of the carrier signal. Moreover, in the case where the carrier frequency fc is switched, a disturbance estimation part forming the controller 40 updates control constants that are used for disturbance estimation and are dependent on the control operation cycle, in a control operation performed one cycle after a control operation immediately after the switching of the carrier frequency fc.

Abstract: Proposed is a driver having dead-time compensation function. The driver having dead-time compensation function generates an output voltage according to a voltage command and a frequency command. The driver includes an inverter, an output current detector and a control unit. The inverter receives a DC voltage and operates with a pulse width modulation mode so that the driver outputs the output voltage and an output current. The output current detector detects the current value of the output current to generate a output current detecting signal. The control unit outputs a switching control signal to inverter according to the voltage command and the frequency command. The control unit corrects a reference command according to dead-time and the output current detecting signal related to the output current so that amplitude and waveform smoothness of the output voltage and the output current are compensated.

Abstract: A method and a control device operate a three-phase brushless direct current motor with phase windings that are fed by an inverter connected to a voltage source having a high potential and a low potential. The semiconductor switches of the inverter are arranged in a bridge circuit and are controlled such that current always flows through two phase windings during motor operation. The motor is operated with normal commutation when the rotational speed is greater than or equal to a minimum rotational speed, wherein the angles are shifted by 60°. During start-up operation, up to the minimum rotational speed, a high-potential-side commutation angle of a phase winding is shifted toward a low-potential-side commutation angle of the phase winding by an angle greater than 0° and less than or equal to 60° with respect to the normal commutation.

Abstract: A motor drive apparatus drives a motor generator using electric power provided from a DC power supply. The motor generator rotates a rotor provided with a permanent magnet using a current magnetic field generated by passing a drive current through a coil of a stator. The motor drive apparatus includes an inverter configured to convert DC electric power provided from the DC power supply into AC electric power for driving the motor generator. An ECU of the motor drive apparatus controls the inverter such that an offset current is superimposed on at least one phase of the coil of the stator and a temperature of the permanent magnet provided at the rotor is raised.