Abstract: A LED full-color lighting device contains a control unit, a light source unit, and a light display unit. The control unit relies on at least a potentiometer to apply various voltages to constant current sources, which in turn individually vary the current conducting through the red, green and blue LEDs of the light source unit, so as to deliver light of various colors. The colored light emitted from the light source unit can be easily and conveniently adjusted to fit a user's specific preference and mood. Colored patterns or textures can be formed on the light display unit so that the color of the light of the light source unit would mix with the colors of the patterns or textures to produce a visual effect as if some of the patterns or textures are changed.

Abstract: A running machine that can prevent overturning of a body in the case of occurrence of an abnormality is provided. The running machine substantially supports the body with coaxially arranged drive wheels, and can drive while maintaining the balance of the body. A control module of the machine comprises a stabilization controller that computes a first torque command for maintaining the balance of the body and a travel controller that computes a second torque command for driving the running machine. A sum of the first torque command and the second torque command is inputted into the motors. When an abnormal condition detector detects occurrence of an abnormal condition, a safe mode controller prohibits the travel controller from outputting the second torque command. This could enable all torque that the motors can output to be used to maintain the balance of the body when occurrence of an abnormal condition is detected.

Abstract: A device for controlling inductive load comprises at least: a power source, a first control assembly, a second control assembly and an inductive load. The first control assembly is connected in series to the power source, and comprises: a relay switch, a relay and a MOSFET, the relay switch is connected to a normal close contact and a normal open contact selectively. The normal open contact is electrically connected to the MOSFET, the normal close contact is connected to a drain terminal of the MOSFET, and a source terminal of the MOSFET is connected to the power source. The second control assembly is structurally similar to the first control assembly. The inductive load is disposed between the normal close contact of the relay switch and the normal close contact of the relay switch.

Abstract: The motor driving inverter circuit module includes first-phase, second-phase, and third-phase high voltage drivers generating first-phase, second-phase, and third-phase upper arm and lower arm driving signals in response to input signals for driving the first-phase, second-phase, and third-phase upper and lower arms and a first-phase, second-phase, and third-phase upper arm and lower arm transistors, generating first-phase, second-phase, and third-phase motor driving output signals in response to the first-phase, second-phase, and third-phase upper arm and lower arm driving signals of the first-phase, second-phase, and third-phase high voltage drivers. The first-phase, second-phase, and third-phase high voltage drivers and the first-phase, second-phase, and third-phase upper arm and lower arm transistors are respectively integrated into separate chips.

Abstract: A fan includes a fan leaf having a rotor in the interior of the fan leaf, and a hollow frame. In the center of the interior of the hollow frame, there is a base for pivoting with the fan leaf. On the surface of the base, there is a stator. The stator is covered by the rotor in the fan leaf. There is a current switch between the stator and the power input terminal for controlling the current direction of the stator to control the fan leaf to rotate clockwise or counterclockwise.

Abstract: There are provided a high-order current distortion compensator which uses rotational position information on an electric motor and a target current value of the electric motor for deciding a compensation value for current high-order-component for canceling torque ripple caused by predetermined high-order components of a current flowing through the motor, and a correction portion which corrects the target current value by using the compensation value supplied from the high-order current distortion compensator. A feedback controller provides feedback control of the electric motor based on the target current value corrected by the correction portion. Thus is suppressed the torque ripple caused by the predetermined high-order components, whereby the degradation of steering feeling is reduced.

Abstract: An inverter circuit includes a temperature measuring section for measuring a temperature of switching elements forming a powering section, a motor speed detector for detecting a speed of a motor, a carrier frequency determiner for determining a carrier frequency based on a temperature of the switching elements and a speed of the motor, and an output waveform determining circuit for determining a duty in response to a load applied to the motor and for switching a carrier frequency.

Abstract: A speed region of a motor is divided into a region lower than a first switch speed VS1, a region higher than a second switch speed VS2 and a region between the first and second switch speeds. An abnormal load determination level to be compared with an estimated load obtained by an observer is set for each of the regions. An abnormal load determination level AL4 applied when an acceleration exceeds a threshold value is set. The abnormal load determination level AL4 is used for comparison with the estimated load until a predetermined period of time elapses after the acceleration to be commanded to the motor, which once exceeded the threshold level, drops. In other cases, the estimated load is compared with the abnormal load determination level having a value according to the speed. If the estimated load exceeds the compared abnormal load determination level, it is judged that a collision is detected.

Abstract: An inverter circuit includes a bridge circuit constituted of a plurality of pairs of a high-side switching element and a low-side switching element, a command signal processing section, a pulse generating section for generating pulse signals to control the inverter bridge circuit according to the command signal to have a dead time to prevent short circuiting of the dc power source and a command signal compensation section. The compensation section modifies the command signal according to a current voltage level of the dc power source to control the dead zone, thereby preventing deformation of ac output power of the bridge circuit.

Abstract: A streetlight powered by solar energy has a lamppost, a circuit panel, a rechargeable battery and a solar array. The lamppost has a post and a lampshade. The lampshade is mounted around the top end of the post and has a top recess. The rechargeable battery is mounted in the lampshade and storing electricity. The solar array is mounted in the top recess in the lampshade and recharges the rechargeable battery. The circuit panel is mounted in the lampshade and has a light. Therefore, the solar array can absorb solar energy and transfer solar energy to electric energy to store electricity in the rechargeable battery. Then the rechargeable battery supplies power to the light.

Abstract: An automatic changeable electromotive vehicle has a driving device. The driving device of the electromotive vehicle is connected to a battery and a generator to form an electric loop. A switch is connected between the battery and the driving device. Therefore, when the switch of the electromotive vehicle is turned on, the battery provides power to the driving device so as to drive the electromotive vehicle. While the driving device also drives the generator to operate, the generator precedes battery to charge. The electromotive vehicle is chargeable automatically during driving. Thus, not only the battery of the electromotive vehicle is charged in driving, but also the traveling distance of the electromotive vehicle is increased.

Abstract: This invention presented is an automotive engine-starting battery, which properly provides backup power for emergency starting once a vehicle has insufficient power to crank over the engine. The invention solves out the drawback of failing to starting the engine of a vehicle owing to insufficient power of a conventional backup battery. The design of the invention is that the battery has one more electrode than the original vehicle battery (i.e. extra 2 Volts) to prevent from the voltage drop problem caused by the wires and clamping apparatuses, in addition, provide voltage for easily starting the engine voltage and current. In the event that the vehicle battery has insufficient power to crank the engine, the battery is able to be carried out of the vehicle for charging and instant cranking the engine by connecting the battery to two clamping apparatuses with positive and negative poles.

Abstract: A roller bag having integral thereto a battery and a small alternator geared to recharge the battery when the wheels of the roller bag are rotated. During times of commuting, such as within an airport terminal, between a terminal and a rental car facility, or in route to a hotel, the battery will remained charged and available to the mobile user to provide a reliable source of power. A power terminal is further integrated into the bag providing external access to the battery, which power terminals permit connection to portable electronic devices, and may include retractable cords and programming tips.

Abstract: A battery receptacle for use with a medical device, said receptacle comprising at least one cavity accessed via a respective door, said cavity adapted to slidably receive at least one non-cylindrical battery to engage with electrical contacts in a single predetermined orientation, said receptacle and said battery each being provided with complementary slidable engagement means that must be engaged with each other when inserting said battery into said cavity, thereby only allowing said battery to engage said contacts in said single predetermined configuration, and wherein said receptacle further comprising at least one portion that allows said battery to be visible when said battery is inserted in said cavity and said door is closed.

Abstract: A battery module is provided. The battery module includes a battery body having a plurality of unit cells arranged in series and having a respective barrier disposed between adjacent unit cells. End plates are disposed on opposite outermost sides of the battery body. A fixing unit fixes together the end plates and the battery body by enclosing an outer circumference of an assembly of the end plates and the battery body.

Abstract: An apparatus and method of managing power for a mobile device is disclosed, which can prevent an inflow of overcurrent to the device when the device is charged. The apparatus includes a state judgment unit to judge whether a battery of the mobile device is being charged, a voltage level detection unit to detect a voltage level of the battery if the battery is judged as being charged, and a control unit to control a driving of the mobile device in accordance with the detected voltage level.

Abstract: The car battery trickle charger comprising a power converter, an extension cord, a storage coil, a universal coupling, and a battery connection. The storage coil includes a spring-loaded winding mechanism and a releasable lock. The universal coupling permits interchange of various configurations of battery connections including positive and negative terminal clamps, positive and negative terminal loops, or a power point adapter.

Abstract: A apparatus for preventing a malfunction prevents a malfunction during recovery from critical suspend. The apparatus includes: a voltage detection unit 2 detecting a voltage value from a secondary battery 1; a charging time monitor unit 4 outputting a system activation enable signal when a charging time of the secondary battery 1 by a AC adapter 3 is monitored and a predetermined time passes; and a power supply control unit 5 controlling a system power supply according to a voltage value detected by the voltage detection unit 2 and a system activation enable signal generated by the charging time monitor unit 4.

Abstract: Regulation of the active and reactive power output or received by a induction machine (1) in a coordinate system fixed on the winding, wherein a first regulator output variable is generated using a first regulator (46-1) as a function of a setpoint variable deviation of the active power and a second regulator output variable is generated using a second regulator (46-2) as a function of a setpoint variable deviation of the reactive power, feedback variables are charged on each of the first and second regulator output variables, which are functions of at least one chronologically changing system variable of the induction machine, and a voltage or a current of the induction machine is determined as a manipulated variable without further regulation at least from the first and second regulator output variables charged with the feedback variables. The feedback variables may linearize the regulation path and then allow restriction to only two simple regulators, e.g., two PI regulators.

Abstract: During burst mode operation of a four switch buck-boost converter, the input voltage and an output voltage can be detected and a preset peak charging current threshold level can be modulated when the difference between the input voltage and output voltage is within a prescribed range. A burst mode charging cycle will progress until the modulated peak charging threshold level is attained and cut off at the set peak level. A charge transfer cycle and discharge cycle may proceed thereafter.

Abstract: A voltage regulator configured to receive a supply voltage from a voltage supply and provide a regulated voltage to digital circuitry is provided. The voltage regulator comprises first circuitry configured to inhibit high frequency energy generated by the digital circuitry from transmitting into the voltage supply, second circuitry configured to inhibit low frequency energy generated by the digital circuitry from transmitting into the voltage supply, and third circuitry configured to maintain the regulated voltage at a substantially constant value in response to a current drawn by the digital circuitry.

Abstract: The method of the invention in one aspect involves electronic power control by varying the amplitude of an electrical power supply voltage, independent of frequency, whereby the output frequency will always be the same as the input frequency. An electrical circuit apparatus for accomplishing this function in a specific embodiment is also disclosed herein. The specific circuitry of this aspect of the invention uses eight solid state switches, such as IGBT's, eight diodes, an inductor, input and output filters and novel controlling circuitry. The controller apparatus and methods of the invention may be used to implement all otherwise conventional converter types, buck, boost, and inverting (and duals of these) versions to obtain different regulating characteristics, including galvanic isolation of the output from the input.

Abstract: A differential output DC-DC converter capable of decreasing power consumption is presented. The differential output DC-DC converter 1 comprises output terminals VP and VM connected to both ends of load, and a switching regulator 10 for passing a source current. It further comprises a third transistor FET3, a choke coil L2, and a fourth transistor FET4 for rectifying a sink current in a flowing direction, and further a second regulator for allowing the sink current to flow, and issuing a voltage higher than a grounding point GND voltage and lower than a voltage of an output terminal VP, to an output terminal VM.

Abstract: A power converter provides power across an isolation barrier, such as through the use of coils. A coil driver has transistors connected in a positive feedback configuration and is coupled to a supply voltage in a controlled manner by measuring the output power and opening or closing a switch as needed between the power supply and the coil driver. An output circuit, such as a FET driver, can be used with or without isolation to provide power and a logic signal.

Abstract: A low dropout voltage regulator apparatus is disclosed, which includes a low dropout voltage regulator circuit connected to a supply voltage, wherein at least one input voltage is input to the low dropout voltage regulator circuit to generate at least one output voltage from the low dropout voltage regulator circuit. A feedback compensation component is also provided, which is integrated with the low dropout voltage regulator circuit. The feedback compensation component is located generally within the low dropout voltage regulator circuit to take advantage of a Miller effect associated with the low dropout voltage regulator circuit in order to withstand high voltages associated with the supply voltage and generate the output voltage from the low dropout voltage regulator circuit.

Abstract: An improved switch for power factor correction circuits includes a six-terminal switch which has a first inductor connecting to a selection line which has a first switch terminal and a second switch terminal, and a second inductor connecting to a conductive line. When the switch is at a first position, the selection line is connected to the first switch terminal, and the conductive line is closed to determine the first and second inductors in a parallel coupling condition and the power conversion circuit in a first duty condition. When the switch is at a second position, the selection line is connected to the second switch terminal and the conductive line is open to determine the first and second inductors in a serial coupling condition, and the power conversion circuit in a second duty condition.

Abstract: A current mirror includes at least a first and a second mirror transistors inserted between a first and a second voltage reference and connected to an input terminal and to an output terminal of the current mirror, respectively. The current mirror further includes a base current compensation block inserted between the input terminal and common control terminals of the first and second mirror transistors and connected to a voltage reference. The base current compensation block at least includes a bias current generator of a bias current and a first compensation transistor inserted, in series to each other, between the voltage reference and the input terminal, and a second compensation transistor inserted between the voltage reference and the common control terminals of the mirror transistors and having a control terminal connected to a control terminal of the first compensation transistor.

Abstract: An analog soft-start circuit for a switching regulator (e.g., a buck converter) including an analog ramp circuit and an open-loop analog voltage clamp circuit. The voltage ramp circuit utilizes a two-stage current divider circuit to generate a very low, stable current signal, and an integrator circuit including a relatively small, integral capacitor to generate the ramp voltage signal in response to the very low current signal. The analog voltage clamp circuit clamps the regulated output signal to the ramp voltage until the ramp voltage signal increases to a predetermined voltage level, thereby causing the regulated output voltage to exhibit the desired soft-start characteristics. The analog clamp circuit includes a current mirror circuit that generates a clamp current that pulls down the error amplifier output stage via a clamping element (e.g., a diode) until the ramp voltage signal reaches a predetermined level.

Abstract: A circuit and method for reducing the variation of a reference voltage as a function of resistivity ? in a current-mode bandgap reference circuit generating a reference current that is applied to an output resistor to generate the reference voltage. According to the invention, a substantially constant current is generated and added to the reference current.

Abstract: The present invention provides a band gap type reference voltage generating circuit and a semiconductor integrated circuit having the same, capable of generating a reference voltage of about 1.2V or less whose temperature dependency is low, and realizing reduced offset voltage dependency of a differential amplifier. A band gap part has: a first resistor and a first bipolar transistor connected in series between power supply voltage terminals; a second resistor, a second bipolar transistor, and a third resistor connected in series between the power supply voltage terminals; and a differential amplifier that receives voltages generated by the first and second resistors, and an output of the differential amplifier is applied to the bases of the two transistors.

Abstract: A receiver for receiving a broadcast channel comprising a spectrum analyzer physically integrated into the receiver and operative to receive an intermediate frequency signal and process the spectral contents of the receive signal.

Abstract: A device is provided for measuring a current flowing in an electrical conductor with a magnetic circuit for coupling to the electrical conductor. The magnetic circuit has an air gap, and a magnetic field sensitive component is disposed in the air gap. The magnetic field sensitive component measures the magnetic field generated by the electrical conductor. Two control cores are disposed in the air gap to control an effective size of the air gap. The control cores each have a control winding for magnetic saturation of the respective control core to control the effective length of the air gap. The magnetic field sensitive component is disposed between the control cores.

Abstract: A current measuring device for detecting current flowing in a current path includes a magnetic sensor for detecting a magnetic field and a magnetic sensor for detecting earth magnetism, the magnetic field detecting magnetic sensor and the earth magnetism detecting magnetic sensor being disposed along the direction of magnetic flux induced by the current flowing in the current path, wherein an earth magnetism component detected by the magnetic field detecting magnetic sensor is canceled by using earth magnetism detected by the earth magnetism detecting magnetic sensor.

Abstract: A syringe adapter assembly 10 for permitting a front loadable power injector 100 having a pressure jacket 106 with an open front end to attach syringes 70 that do not require pressure jackets for their intended purpose. The syringe adapter assembly comprises a main adapter body 12 having a central bore 28 therethrough, a lifting ring 60 secured within the main adapter body 12, a connector plate 50 for attaching the main adapter body to the door injector, and a drive ram extender 30 that attaches to the drive ram. Additionally, the ram extender 30 may have a ram tip cone 40 attached at its forward end. The connector plate 50 is inserted into a recess 112 in the rear side of the door, and attaches to the main adapter body 12 located on the front side of the door. The invention additionally or alternatively comprises both a syringe lock 120 that locks an installed syringe relative to the injector to prevent unwanted movement of the syringe, and a method of locking syringe relative to an injector.

Abstract: A micro-electromechanical system (MEMS) current sensor is described as including a first conductor, a magnetic field shaping component for shaping a magnetic field produced by a current in the first conductor, and a MEMS-based magnetic field sensing component including a magneto-MEMS component for sensing the shaped magnetic field and, in response thereto, providing an indication of the current in the first conductor. A method for sensing a current using MEMS is also described as including shaping a magnetic field produced with a current in a first conductor, sensing the shaped magnetic field with a MEMS-based magnetic field sensing component having a magneto-MEMS component magnetic field sensing circuit, and providing an indication of the current in the first conductor.

Abstract: A method and an apparatus are disclosed, to screen patients or other areas for ferromagnetic objects, particularly for use intra-operatively in an operating room. The device comprises at least one magnetic field source, at least one magnetic gradiometer, and the associated electronics. The field source and the gradiometer are supported by an arm structure which can be manipulated to position the field source and the gradiometer at one or more positions near areas of interest, such as areas on a patient or other subject, and to orient the field source and the gradiometer so that the axis of the magnetic field is arranged along three different non-parallel, non-coplanar, axes to ensure detection of any ferromagnetic object regardless of its shape and orientation. The device can be manipulated to place the sensor arrays in close proximity to selected parts of a subject's body, for screening purposes.

Abstract: A device (16) used to measure at least one component of a magnetic field, includes a magnetoresistive sensor (102) and a measuring chain (28). The input of the measuring chain is connected to the magnetoresistive sensor (102), while the output thereof is intended to supply information that is representative of the magnetic field in the region of the sensor. In addition, the measuring chain (28) includes elements (136) for isolating a frequency component of the signal from the sensor representative of the magnetic field for a unique pre-determined frequency (FI).

Abstract: A device for testing a test specimen for surface faults is equipped for delivering a magnetic flux into the specimen and has induction probes measurement sensors. At least two yoke legs have opposed gap-forming ends with oppositely poled exciter coils between which the test specimen can be guided. Outside ends of the yoke legs opposite the gap-forming ends are connected to one another by a magnetic flux conductor so that the magnetic flux runs perpendicular to the lengthwise direction through the test specimen. To adapt to test specimens of different cross section, the yoke legs can be moved and fixed. Testing of test specimens by means of high-energy magnetic alternating fields improved because the high heat losses produced in this process are adequately dissipated. The device is especially well suited to determine the quality of bars, pipes and the like in a hot rolling mill with high-energy alternating magnetic fields.

Abstract: There is a monitoring platform for providing a sensory feed to a musician. There is a base, an electronics module, a reflective coating, an electrical outlet, and a tactile transducer. The base includes a ramping member, an upper surface member, a storage member, first and second clamshell members hingedly coupled, a handle, a coupling member or latch, and a vent. There is also an amplifier, a high pass filter, a headset and port, a daisy-chain signal port, and modular construction such that multiple platforms may be joined to form a single surface.

Abstract: The effects of prior pulses are to be enhanced. A pulse string which monotonically decreases the flip angle is inserted between the prior pulse in one round and the imaging pulse in the previous round, and a pulse string which monotonically increases the flip angle is inserted between the prior pulse and the imaging pulse in one round. A return from the steady state to the equilibrium state can be achieved not only for on-resonance magnetization but also for off-resonance magnetization before the prior pulse is applied. Therefore, the effects of the prior pulse P can be fully attained. Further, not only on-resonance magnetization but also off-resonance magnetization can be brought close to the steady state before the imaging pulse is applied.

Abstract: In a method and apparatus for detection improvement of a weakly-sensitive atomic nucleus type in MR spectroscopy data acquisition using polarization transfer for a weakly-sensitive atomic nucleus type (A) with involvement of an MR-active, strongly-sensitive atomic nucleus type (X), all RF pulses are radiated sequentially, i.e. with defined time interval relative to one another, such that at no point in time of the sequence are different RF pulses radiated simultaneously or overlapping, and the sequence of the RF pulses causes a polarization transfer of the two involved atomic nucleus types (A), (X).

Abstract: A method and a system for acquiring diffusion magnetic resonance images with compensation of the effects of eddy currents induced by the diffusion weighting (DW) gradient pulses. Prescan data are first acquired using the same DW sequence to be used for imaging. The prescan data are used to obtain eddy current parameters that model the effects of DW-induced eddy currents under the exact conditions under which DW images are to be acquired. The DW imaging sequence is then slightly modified according to the eddy current parameters and used to acquire DW image data with the effects of DW-induced eddy currents compensated.

Abstract: In order to produce field strength gradients (x,y) for a NMR machine, the curve-shaped gradients are substituted by coils arraigned in tubes. Said tubes are distributed on the annular circumference (6) of the examination space of the tunnel NMR machine. Said invention makes it possible to produce at request field strength gradients in all necessary directions by providing each tube with the same set of coil elements and supplying them with selected currents.

Abstract: A magnetic resonance imaging apparatus includes a first magnetic field coil (30) and a second magnetic field coil (32). A power supply (40, 42) energizes the first magnetic field coil (30) and selectively energizes the second magnetic field coil (32) to selectively generate a first magnetic field defining a first selectable field of view (FOV1) that is elongated in a first direction and a second magnetic field defining a second selectable field of view (FOV2) that is elongated in a second direction different from the first direction.

Abstract: A matrix shim system for generating magnetic field components superimposed on a main static magnetic field, comprising a plurality of annular coils, is characterized in that it comprises g groups G1 . . . Gg of coils, with g being a natural number ?1, wherein each group Gi consists of at least two single annular coils connected in series, wherein each group Gi is designed to generate, in use, a magnetic field B z ? ( G i ) = ? n = 0 ? ? A n ? ? ? 0 ? ( G i ) · T n ? ? ? 0 . For each group Gi, there are at least two values of n for which ? A n ? ? ? 0 ? ( G i ) · R n ? { ? A 20 ? ( G i ) · R 2 ? , … ? ? , ? A N ? ? ? 0 ? ( G i ) · R N ? } ? 0.5 ? ? ? and ? ? ? N ? n ? 2 , with N: the total number of current supplies of the matrix shim system, and R: smallest inside radius of any of the annular coils of the matrix shim system.

Abstract: A magnet for an NMR analyzer includes a superconductor coil for generating a magnetic field in a magnetic space surrounded by the superconductor coil. The superconductor coil has a shim coil group disposed at least one of inside and outside of the superconducting coil. The superconducting coil provides a first access port for receiving a probe inserted into the magnetic space along a central axis thereof and a second access port having one end for receiving a sample tube containing a sample inserted into the magnetic space in a direction transverse to the central axis of the magnetic space. The second access port is open at an other end thereof.

Abstract: A method and apparatus for detecting a change in electrical property between contacts. A one-time operating state detection device includes a member coupling a pair of contacts and a detector for detecting a change in the coupling between the pair of contacts when the member is moved.

Abstract: [PROBLEM] To provide a method and an apparatus for estimating saturated polarization voltage drops, and a method for estimating residual discharge capacity of the battery in order to measure accurately the state of the battery.

Abstract: A structure of detecting an anomaly of the battery pack (2) including a plurality of battery cells (41a, 41b, 42a, 42b, 43a, 43b) connected in series or in parallel, which detects whether or not an impedance of at least one of battery cells deviates from a stipulated range. Also, a structure to detect whether or not an impedance change of at least one of battery cells exceeds a stipulated range.

Abstract: An electrostatic discharge (ESD) event and transient signal detection and measurement device and method are described. The device and method are able to distinguish between an ESD event and other non-ESD events.