Since the bent arm street lamp1

The connecting way of LED street lamp current mature application of 1 w leds is a single grain, obviously, to do such a semiconductor light is only 50 luminous tube. Only 50 LED the entire series, or there are some problems in parallel. If all the series connection, if there is a grain of LED open circuit loss

the connecting way of LED street light at present, the mature application is a single 1 w leds. Obviously, making this a semiconductor light need 50 light-emitting diodes (leds). All 50 leds in series or in parallel, there are some problems. If all the leds are in series, if a light emitting diode damage because of the way, the whole lamp is not bright, all of the 50 leds are in series, the driving voltage for at least 150 volts, thus reducing the security. If all of them in parallel, and a path or short circuit, open is a current imbalance, it will affect the service life of the lamp. From the point of drive technology and the characteristics of light emitting diode, multiple leds group should be preferred in series. So, if the drive to provide current all the luminous tube current are the same. From the point of practical application, as long as the driver not spiral out of control, and flow to the luminous tube current right, luminous tube is rarely appear. Even poor luminous tube itself and failure, it is usually not bright, but it can still keep the path, the other tube is still on. In addition, the luminous tube has strong flow capacity. For example, the current 600 n1a 300 ma 1 watt luminous tube will not be damaged in a short time. When using light emitting diode series, therefore, should be the main method. Only in this way can the light emitting diode with stable and consistent with the current, which is beneficial to prolong the life of the lamp. Because the pipe is too much, all series of pipe driving voltage is too high, so they must be in series and in parallel, so they are in series. A special light emitting diode drive usually is a current source. Because leds provide constant current drive, when multiple series-parallel connection, measures must be added external flow, and will provide the total drive current average assigned to each list. The simplest way is in each series has a resistance to share current. When multiple strings in parallel, each string of luminous tube main voltage drop should be as consistent as possible, then the series resistance to restrain the current deviation. If the voltage drop at the ends of the power unit is too big, the power consumption to increase, if the voltage drop is too small, the flow effect is not good. In general, series connection pipe, head of the voltage drop on the road at about 5%. A led lamp cooling method solving the problem of heat dissipation rely mainly on the lamps and lanterns of reasonable structure design. The solution is to use a thin metal plate as the base plate. Leds may, according to the number of the luminous tube used in aluminum production and luminous tube outer diameter of the same diameter hole, the distance between two holes is 0. 7 mm. Then put the luminous tube closely embedded in the metal plate, luminous tube pin connection in the back of the metal plate. Lamp shell is made of metal materials, the installation has a luminous tube sheet metal and metal case close together, such lamp work when heat can conduct through the metal plate to the metal shell, metal shell is exposed to the air in the body, as by radiation and convection heat. In order to reduce the volume of the lamp and ensure greater heat dissipation area, the shell of the lamp body can use the fin structure of the ribbed. Manufacturers of solar street lamps, light, solar garden lamp, garden lamp manufacturers, solar led street lamp, street lamp manufacturers, led lights price