Abstract: [Problem] To provide an artificial lighting device capable of suppressing harmonics with a structure including only a linear load without use of a switching element and stopping inrush current while preventing a reduction in power factor by omitting a smoothing capacitor. [Solution] An artificial lighting device comprise: multiple LED elements (200); an input division unit (110) for dividing a three phase power supplied from a three-phase AC power supply (300) into each input to U, V, W; a full-wave rectifier (120) for performing full-wave rectification on the divided input; a single phasing unit (130) for creating a single phased output by superimposing the outputs subjected to the full-wave rectification; and a single phased power supply (140) for providing the LED elements (200) with the output from the single phasing unit (130) as a power supply.

Abstract: An optoelectronic circuit for receiving a variable voltage containing alternating increasing and decreasing phases, the optoelectronic circuit including a plurality of assemblies of light-emitting diodes and a switching device for controlling or interrupting the circulation of a current in each assembly and for varying the intensity of the current according to the number of assemblies through which the current passes during at least one increasing or decreasing phase.

Abstract: A pair of phase shifted polygon primary windings, each of which are magnetically coupled to one of a pair of forked wye output windings providing a phase shifted pseudo multiple pulse output voltage waveform from the secondary output windings.

Abstract: A three-phase power supply (10), intended especially to supply LEDs system (20), has a system of a diode bridge rectifier which comprises rectifying diodes (101, 102, 103, 104, 105, 106). The three-phase power supply (10) is additionally equipped with FETs and each of the rectifying diodes is bypassed by an FET of a rectifying unit (111, 112, 113, 114, 115, 116), respectively, which is controlled by a control system (40), comprising en anglogue-to-digital converter ADC 403, a digital-to-analogue converter (402), a microcontroller (401), which provides a control signal to a gate of the appropriate FET through the input/output (404). Once the control system (40), in particular the microcontroller (401), detects stable power supply conditions and starts operation of elements of an LED sequencer (30), it starts at the same time to control over the FETs in the active rectifier.

Abstract: The present invention utilizes a three-phase or multiphase AC power source, and the electric power of each phase respectively drives its corresponding solid-state light emitting member, and the solid-state light emitting members respectively driven by each phase power are arranged adjacently or arranged with an overlapping means, so that the light of the individual solid-state light emitting members respectively driven by the multiphase power source and arranged adjacently or arranged with an overlapping means can reduce the brightness pulse through synthetic illumination; and through being controlled by a solid-state switch device for controlling AC conductivity phase angle (1000) installed on the power source of each phase, when the illumination brightness of corresponding solid-state light emitting member is lower than that of other solid-state light emitting members arranged adjacently or arranged with an overlapping means, the power source is cut for saving energy.

Abstract: The present invention utilizes a three-phase or multiphase AC power source, and the electric power of each phase respectively drives its corresponding solid-state light emitting member, and the solid-state light emitting members respectively driven by each phase power are arranged adjacently or arranged with an overlapping means, so that the light of the individual solid-state light emitting members respectively driven by the multiphase power source and arranged adjacently or arranged with an overlapping means can reduce the brightness pulse through synthetic illumination; and through being controlled by a solid-state switch device for controlling AC conductivity phase angle (1000) installed on the power source of each phase, when the illumination brightness of corresponding solid-state light emitting member is lower than that of other solid-state light emitting members arranged adjacently or arranged with an overlapping means, the power source is cut for saving energy.

Abstract: A method and apparatus comprising a signal generator and wires. The signal generator is configured to generate electrical signals. The electrical signals have amplitudes and first phases. The wires are connected to the signal generator. The wires are configured to emit photons having phases in response to receiving the electrical signals. The photons have frequencies based on the amplitudes of the electrical signals and second phases based on the first phases of the electrical signals. The first phases of the electrical signals are selected such that the photons have a desired radiation pattern.

Abstract: An apparatus for exposing photovoltaic (PV) modules to simulated sunlight for testing purposes, comprising a chamber including a plurality of lamps disposed on a substantially vertical lamp plane, at least one substantially vertical target plane upon which are disposed one or more PV modules, at least one reflector for directing light from the lamps to the at least one target plane, and a cooling system to exhaust heat from the apparatus and maintain the temperature of the PV modules at a predetermined value.

Abstract: The present invention relies on polyphase alternating current power with phase difference or direct current power rectified from polyphase alternating current power to drive a common electric-driven luminous body, or to separately drive adjacently installed individual electric-driven luminous bodies so that the pulsation of the outwardly projected light is reduced.

Abstract: A three phase rectifier rectifies received three phase a.c. power to generate a ripple d.e. voltage. A power distribution bus conveys distribution panel conveys distribution power comprising the ripple d.c. voltage or an a.c. voltage derived therefrom to a location of an LED based lamp that is distal from the three phase rectifier. Additional circuitry disposed with the LED based lamp drives the LED based lamp using the distribution power.

Abstract: Even in a high pressure discharge lamp causing temperature difference between electrodes when an AC current is supplied, the temperature difference is eliminated to suppress the arc movement, thereby suppressing flickering caused thereby during stable lighting. The lamp current is formed into a current waveform including a standard period current supplied at a predetermined standard period and a short period current of a period shorter than the same and, on every one-half period of the standard period current, formed into a current waveform by supplying the short period current inverting the polarity from the identical polarity to the opposite polarity in the next one-half period for 1 period, in which the duty ratio before and after the polarity inversion of the short period current and the duty ratio before and after the polarity inversion side can be decided automatically by the duty ratio.

Abstract: The present invention provides an electricity generator for a lighting tower having a plurality of discharge lamps, each lamp being of power greater than 750 W, the generator being arranged to be driven by an engine, the generator being a multiphase generator having n phases, where n is an even integer, each phase being independent in a magnetic circuit that is common to all of the phases and being configured to power one lamp, the generator comprising a rotor with permanent magnets, having 3 n poles, and a stator concentric with the rotor and subjected to the radial magnetic flux from the magnets, the stator comprising a stack of laminations of silicon iron having a silicon content greater than 0.5% and of individual thickness greater than 0.35 mm, defining 4 n magnetic circuit teeth, with every other tooth carrying a winding.

Abstract: The present invention relates to glow-switch starters 1, lighting devices therewith and use thereof. The glow-switch starter 1 is suitable for use with three phase supply voltages substantially higher than the common 230V supply voltage 26. This allows more efficient gas discharges in e.g. fluorescent lamps 20, and/or more lamp power, and/or less energy losses in ballasts 22 and lamp electrodes. To make the glow-switch starter suited for such use, according to the invention, the gas filling 5 of the starter 1 is adapted. An important criterion is that the glow current in the steady state operation of the fluorescent lamp that is started by the starter is small enough to prevent closing of the (bimetallic) switch.

Abstract: A ballast (20) for powering at least one gas discharge lamp (52) from a three-phase AC voltage source (30) comprises a three-phase rectifier circuit (200), a high frequency filter capacitor (300), a high frequency inverter (400), and a three-phase EMI filter (500). Three-phase EMI filter (500) comprises a common-mode EMI inductor (510), a Y-capacitor (540), and a plurality of X-capacitors (550,560,570). Common-mode EMI inductor (510) comprises three magnetically coupled windings (512,514; 522,524; 532,534) each of which is, preferably, split into two equal winding sections. Ballast (20) and three-phase EMI filter (500) provide substantial cost and performance benefits in comparison with existing approaches.

Abstract: A multiple lamp instant start ballast system has multiple fluorescent lamps and a ballast. The lamps have substantially similar current characteristics. The ballast has a ballast circuit operable to supply instant start starting voltages and operating currents, with the voltages and currents being approximately equal in magnitude and differing in phase by 360°/n, where n is the number of lamps. By connecting the ballast output leads to the first end of each lamp, the second ends of the lamps may be connected together creating a balanced n-phase system. Thus, wiring between the ballast and the second ends of the lamps is unnecessary. An improved light fixture adds a chassis and lamp sockets to the multiple lamp instant start ballast system described. The standard wire-way and wire-way cover are obviated since no wiring need be run to the second ends of the lamps. Wiring may be reduced by locating the ballast adjacent to the lamp first ends.

Abstract: Disclosed herein is a centralized power reducing device, particularly for lighting installations, comprising, on each phase of the installation power source, a winding (16) in series with load (10), wound on a magnetic core (18), the current supplied to load (10) flowing therethrough, a second winding (20) wound on said magnetic core (18), a drive or control current flowing therethrough, means (22, 24) for changing said drive or control current and wherein said means (22,24) for establishing the extent of the drive or control current in said second winding (20) are comprised of a multiple-tap autotransformer (22), the connection of said autotransformer (22) taps occurring by means of relays (24) controlled by a logic unit (26).

Abstract: A dimming control for a high intensity lighting system uses a single additional control wire for control of the dimming function. The lighting system operates on multi-phase power. A transmitter for transmitting a control signal over the single control wire is connected between two of the phases of the multi-phase power supply, or between one phase and neutral. The transmitter, upon the occurrence of a predetermined condition, transmits a control signal to the single control wire. The control signal is a rectified portion of the power supply. The predetermined condition is motion as sensed by a motion sensor, operation of a timer, or operation of a manual switch. A receiver connected to the control line receives the control signal and switches the light to a low light output mode. The is accomplished by changing the capacitance of the ballast circuit for the light. Each lamp of the lighting system has a receiver connected to the single control wire.

Abstract: In one embodiment of the present invention, a daytime running lamp (DRL) system for a motor vehicle includes a switchable connection from the headlamps of the vehicle to the neutral connection of the vehicle's alternator. Compared with the full system voltage of the vehicle, the neutral connection of the alternator is a lower-voltage source which can drive the headlamps at reduced brightness. Such reduced brightness is a typical characteristic of DRL systems. The system disclosed herein can be more cost-effective and provide greater energy efficiency than alternative DRL systems.

Abstract: In a plasma processing s including a processing chamber and plate-parallel electrodes, provided in the processing chamber, for generating a high-frequency electric field in response to a high-frequency voltage, a ring-shaped core is provided in the periphery of the processing chamber, and a toroidal coil includes a plurality of 2n split coils wound in all the periphery of the ring-shaped core so that each pair of split coils oppose to each other. An alternating-current power source for generating a plurality of n-phase alternating-current currents including a plurality of n currents having a phase difference of either .pi./n or 2.pi.

Abstract: A device and method for establishing and maintaining a gas discharge extending essentially through the entire space between electrodes which face each other. The gas discharge is obtained by providing on at least one of the surfaces of the electrodes facing each other a thin dielectric coating, and applying a suitable current, in the range of from about 50 KHz to about 2 MHz. A high frequency excitation voltage is used, and the thin dielectric coating acts as a capacitor.

Abstract: A light source having a single glass bulb housing and a multiple of three electrically interconnected fluorescent tubes. The tubes are located outside of the focal point of a smooth curved mirror. The phases of the fluorescent bulbs are electrically overlapped so as to substantially eliminate flickering of the light and to maximize the light intensity.This is a file wrapper continuation of application Ser. No. 166,783, filed Mar. 2, 1988; which is a file wrapper continuation of application Ser. No. 859,614, filed on May 5, 1986, both now abandoned.

Abstract: During operation of ionized vapor discharge lamps and the partial load range, the lamp current is reduced from the rated value, the drop in voltage is measured during and after the reduction of the lamp current, and when the period of constant voltage that follows the drop in voltage is reached, the lamp current is increased accompanied by simultaneous determination of the increase in voltage. The lamp current is thereupon controlled in such a way that during the partial load range operation of the lamp, the voltage value is slightly greater than that of the voltage of the period of constant voltage.

Abstract: A multi-electrode plasma source for maintaining a plasma loop for heating a stream of sample material traveling along a predetermined path through the loop. Included is at least one set of at least three spaced-apart electrodes having tips circumferentially distributed about such a stream path. Voltages are applied to the electrodes and plasma gas is directed into the region of the tips. The tip distribution, voltages and plasma gas flow are appropriate to generate electrical plasma generally surrounding the path.

Abstract: An improved gas laser is disclosed. The laser has a support tube to support and to maintain the alignment of the optical resonator structure. The gas lasing medium is used within the support tube to maintain the tube at a substantially constant temperature above the ambient. Furthermore, an active temperature controller is disclosed. The temperature controller maintains the gas lasing medium in the support tube at a substantially constant temperature. An active pressure controller is also disclosed. The active pressure controller uses a pressure sensor, an electronic processor, and a motor-driven needle valve to maintain the pressure of the gas lasing medium in the laser within the desired operating pressure range. The laser can also be switched in operation from a continuous mode to a pulsing mode. An active power control system is disclosed wherein the power output of the laser, through an active feedback loop is maintained at the desired level.

Abstract: An illumination control system for gas discharge lamps which can be dimmed is provided in which a central inverter produces an output voltage at a high frequency which can be about 23 kHz. The amplitude of the inverter output is adjustable to dim the lamps. A transmission line consisting of spaced wires having respective thick insulation sheaths distributes the high frequency power to remotely located assemblies of ballasts and lamps. The ballasts consist of passive linear components. A high power factor rectifier network is disclosed for providing a d-c input to the inverter from the 50/60 Hz mains.

Abstract: A method of energizing a laser source stimulating flash lamp directly from an AC power line. Uncontrolled diodes couple the anode and cathode of the flash lamp directly to the AC line. The lamp is triggered by a separate triggering circuit which produces its trigger pulse at a predetermined phase of the AC power source. The use of high current carrying controlled rectifiers and large energy storage devices is thereby eliminated.