摘要:
The present invention relates to an overvoltage protection circuit (1) for protecting the electronics of a motor, in particular of an EC motor, against overvoltage pulses, with two protective devices (FS1, FS2) arranged in series connection between two connections (10, 20), wherein a resistor (R1) or (R2) is connected in parallel to each of the protective devices (FS1, FS2) and at least one capacitive element (C1) is provided in parallel connection to the first protective device (FS1), wherein the overvoltage protection circuit (1) has, between the connections (10, 20), at least a first (lower) and a second (higher) breakdown voltage point at a voltage UZ1 or UZ2 dependent on the voltage change over time k=(dU/dt) of a voltage UGA at the connections (10, 20).
摘要:
An LED tube lamp including a glass lamp tube, an LED light strip disposed inside the glass lamp tube, and an end cap attached over an end of glass lamp tube is disclosed. The glass lamp tube is covered by a heat shrink sleeve. The inner surface of the glass lamp tube is formed with a rough surface or a light scattering region. The glass lamp tube includes a main body region, a rear end region, and a two-arc-shaped transition region connecting the main body region and the rear end region. The LED light strip includes a bendable circuit sheet being longer than the glass lamp tube to form a freely extending end portion.
摘要:
Embodiments of the invention include a luminaire that includes a plurality of different light engines. Light engines having different light distributions can be included in a single luminaire and a subset of the light engines selectively driven to dynamically change the light distribution of the luminaire. In this way, a single luminaire is capable of illuminating an area with a variety of different light distributions.
摘要:
Various embodiments provide a fuse for a light emitting diode fluorescent lamp retrofit lamp, the fuse including a first electrical fuse connecting element for the electrical connection to an electric socket connecting element of a socket of the light emitting diode fluorescent lamp retrofit lamp; and a second electrical fuse connecting element for the electrical connection to a driver of the light emitting diode fluorescent lamp retrofit lamp; wherein the first fuse connecting element is designed as a connecting pin which is provided and equipped for a rigid connection to the socket connecting element.
摘要:
In one embodiment, when the current density at the cathode is less than 0.2 mA/mm2, cathode sputtering is avoided or reduced to such an extent that the life time of the CCFL is not significantly adversely affected. In another embodiment, the internal diameter (ID) of the CCFL tube is within the range of 3 to 16 mm. Preferably, the distance between the anode and cathode is within a range of about 200˜1000 times of the internal diameter of the CCFL tube, and the distances between at least one section of the CCFL tube and two adjacent sections of the CCFL tube is less than about 5 times an outside diameter of the CCFL tube. Preferably, the efficiency of the CCFL is not less than about 55 lm/W.
摘要翻译:在一个实施例中,当阴极处的电流密度小于0.2mA / mm 2时,避免或减少阴极溅射到CCFL的寿命没有受到显着不利影响的程度。 在另一个实施例中,CCFL管的内径(ID)在3至16mm的范围内。 优选地,阳极和阴极之间的距离在CCFL管的内径的约200〜1000倍的范围内,并且CCFL管的至少一个部分与CCFL管的两个相邻部分之间的距离较小 比CCFL管的外径的约5倍。 优选地,CCFL的效率不低于约55lm / W。
摘要:
An organic electroluminescence lighting device includes a planar organic electroluminescence element; a planer heat diffusion plate provided on one surface of the organic electroluminescence element; and a constant current circuit element that is placed so as to contact the heat diffusion plate and supplies a constant current to the organic electroluminescence element.
摘要:
A composite ignition device includes a positive electrode having a tip formed thereon that is bonded to a first insulator to form a firing cone assembly. A second insulator having a negative capacitive element embedded therein is attached to the firing cone assembly. A positive capacitive element is disposed in the second insulator and is separated from the negative capacitive element by the second insulator. The positive capacitive element is coupled to the positive electrode. The positive and negative capacitive elements form a capacitor. A resistor is coupled to the positive capacitive element. An electrical connector is coupled to the resistor and attached to the second insulator. A shell includign a negative electrode having a tip is attached to the second insulator and the firing core assembly and coupled to the negative capacitive element. The negative electrode tip is spaced apart from the positive electrode tip.
摘要:
A generator-driven lighting device for a hand-held power tool has a lighting device, mounted on said main body of said power tool; an electric generator assembly, mounted on said power tool, supplying said lighting device with power; and a transmission device, connecting a generator axis of said generator and a main axis of said power tool, which thereby drives a rotational movement of said generator, causing said generator to generate electric power; wherein by said power tool mechanically driving said generator, said lighting device provides lighting for a user operating said power tool.
摘要:
An arc tube comprises a light transmissive body containing an arc generating and sustaining medium and has a press seal formed at one end of said body. The press seal comprises a planar portion separating opposed edges. A first foil is sealed in the planar portion. A lead-in conductor is attached to the foil and extends outside of the body and an electrode is also attached to the foil and extends inside the body. A first cavity is formed on a first of the edges and a second cavity is formed on a second of the edges. A fill is provided in each of the cavities for supporting emission of ultraviolet radiation; and a second foil sealed in the planar portion is attached to the first foil, said second foil having a first end terminating in the first cavity and a second end terminating in the second cavity. A ground plane is provided adjacent the cavities. A high voltage pulse applied to the electrodes, and, thus, the foils, creates a capacitive discharge creating the ultraviolet radiation which aids in starting the lamp in which the arc tube is employed.
摘要:
An apparatus and method for increasing the reliability of an arc discharge occurring in metal halide gas discharge lamps by providing UV radiation in the gas discharge path.