The Chinese LED industry started in the 1970s. After more than 30 years of development, the Chinese LED industry has initially formed a relatively complete industrial chain including the production of LED epitaxial wafers, the preparation of LED chips, the packaging of LED chips, and the application of finished LED products.
LED lighting LEDs are made of III-IV group compounds, such as GaAs (gallium arsenide), GaP (gallium phosphide), GaAsP (gallium arsenide) and other semiconductors, the core of which is the PN junction. Therefore, it has the IN characteristics of a general PN junction, that is, forward conduction, reverse cutoff, and breakdown characteristics. In addition, under certain conditions, it also has luminescent properties. Under the forward voltage, electrons are injected into the P region from the N region, and holes are injected into the N region from the P region. A part of the minority carriers (minor carriers) that enters the opponent's area recombine with the majority carrier (multiple carriers) and emit light. Assuming that luminescence occurs in the P region, the injected electrons directly recombine with valence band holes to emit light, or they are first captured by the luminescent center and then recombine with holes to emit light. In addition to this luminescent recombination, some electrons are captured by the non-luminescent center (the center is located near the middle of the conduction band and the dielectric band), and then recombined with the hole. The energy released each time is not large and cannot form visible light.
Market requirements for LED lighting products:
Some people call the LED light source a long-life lamp, which means a lamp that never goes out. Solid cold light source, epoxy resin encapsulation, no loose parts in the lamp body, there are no shortcomings such as filament burning, thermal deposition, light decay, etc. The service life can reach 60,000 to 100,000 hours, which is 10 times longer than the traditional light source the above.
Therefore, to achieve such an ideal state, anti-aging ability is particularly important.
1. Aging test of LED lighting products:
The long-term aging test of LED backlight and lighting products is a very important test. Through the aging test, it is possible to find early failures such as light decay, color temperature change, and electrical leakage that may occur during long-term use of LED products, which is conducive to the stability of product performance. ITECH power supply and aging test software are mainly used for aging test of LED backlight and lighting products.
The results of the aging test of LED lighting products have a great relationship with the equipment used. The aging equipment and LED lighting products must ensure that the optimal aging time is determined under the condition of sufficient heat dissipation, and the aging system monitors the data for analysis and comparison. In order to get the most accurate test data, so as to achieve the purpose of production and testing.
Second, the characteristics of the power supply and aging system used in the LED aging test:
Because the working current of LED is very special, it needs a professional test system to get reliable data. In general, the power supply and aging system used in the LED aging test should have the following characteristics:
1) High power ratio digital control DC power supply, with a wide voltage and current usage rate, and a wide range of applications;
2) The rate of change of voltage and current can be automatically controlled to minimize the cost;
3) High precision and high resolution;
4) Low noise and ripple;
5) As small as possible, save space;
Micro motors Based on Dc Motor, Micro Motor belongs to the small size of dc motor,micro motor rotor, back cover, chassis, rotor winding is mainly copper, back cover most of the use of plastic material, motor shell use galvanized steel plate, the micro motor can be ROHS test.
A micro motor is any of a class of rotary electrical machines that converts direct current electrical energy into mechanical energy. The most common types rely on the forces produced by magnetic fields. Nearly all types of micro motors have some internal mechanism, either electromechanical or electronic, to periodically change the direction of current flow in part of the motor.
Micro motor is mainly used in: outdoor lamps, electronic toys, model aircraft, intelligent bin, breeze machine, etc
Method of use: the best stable in horizontal plane, installed on the Micro motor output shaft parts, cannot use a hammer to knock, knock prone to press into the micro motor drive, may cause damage to internal components, and cannot be used in the case of blocked.
Operating temperature range:
Micro motor should be used at a temperature of -10~60℃.
The figures stated in the catalog specifications are based on use at ordinary room temperature catalog specifications re based on use at ordinary room temperature (approximately20~25℃.
If a micro motor is used outside the prescribed temperature range,the grease on the gearhead area will become unable to function normally and the motor will become unable to start.Depending on the temperature conditions ,it may be possible to deal with them by changing the grease of the motor's parts.Please feel free to consult with us about this.
Storage temperature range:
Micro motor should be stored ta a temperature of -15~65℃.
In case of storage outside this range,the grease on the gearhead area will become unable to function normally and the motor will become unable to start.
Service life:
The longevity of micro motor is greatly affected by the load conditions , the mode of operation,the environment of use ,etc.Therefore,it is necessary to check the conditions under which the product will actually be used .The following conditions will have a negative effect on longevity.Please consult with us should any of them apply.
â—Use with a load that exceeds the rated torque
â—Frequent starting
â—Momentary reversals of turning direction
â—Impact loads
â—Long-term continuous operation
â—Forced turning using the output shaft
â—Use in which the permitted overhang load or the permitted thrust load is exceeded
â—A pulse drive ,e.g.,a short break,counter electromotive force,PWM control
â—Use of a voltage that is nonstandard as regards the rated voltage
â—Use outside the prescribed temperature or relative-humidity range,or in a special environment.
â—Please consult with us about these or any other conditions of use that may apply,so that we can be sure that you select the most appropriate model.
when it come to volume production,we're a major player as well .each month,we rurn out 600000 units,all of which are compliant with the rohs directive.Have any questions or special needed, please contact us, we have the engineer group and best sales department to service to you Looking forward to your inquiry. Welcome to our factory.
Micro Motor
Micro Motor,Micro Dc Motor,Micro Vibration Motor,Micro Electrical Motor
Shenzhen Shunchang Motor Co., LTD. , https://www.scgearmotor.com