Qingdao ASIC design studio Huabeier microelectronics high-frequency source business unit
Keywords: stroboscopic, stroboscopic depth, stroboscopic effect, driving electric power frequency, high frequency energy saving lamp Abstract: The stroboscopic effect of electric light source is extremely harmful, and the technical mechanism generated is more complicated. This paper only briefly understands the technical mechanism and harmful performance of stroboscopic and stroboscopic effects from the perspective of correctly understanding the harmful effects of stroboscopic effects and scientific selection of new light sources and constructing a bright and comfortable green lighting environment. Technical countermeasures.
While the electric light source brings light to human beings, it also brings new harm to human beings due to the stroboscopic light of the electric light source, namely the stroboscopic effect.
The stroboscopic effect refers to two concepts. One is stroboscopic: the depth at which the luminous flux of the electric source fluctuates. The greater the depth of the undulation, the greater the stroboscopic depth. The second is the stroboscopic effect: the negative effect of the strobe of the electric light source on human vision. The greater the stroboscopic depth, the greater the negative effect and the more serious the hazard. The stroboscopic and stroboscopic effects are directly related to the type of electric light source and its technical performance. Different types of electric light sources with different technical performances have different stroboscopic and stroboscopic effects.
Correct understanding, the harmful effects of stroboscopic and stroboscopic effects of electric light sources, scientifically grasping and improving technical measures. It is of scientific importance to build a bright and comfortable green lighting environment.
one. Stroboscopic light source used <br> current depth, in the production of daily life. The most widely used electric light source, mainly incandescent lamps, high-pressure mercury (sodium) lamps, straight tube (inductive) fluorescent lamps. The stroboscopic depths of the above several electric light sources are listed below:
Incandescent lamp | High pressure mercury (sodium) lamp | Straight tube fluorescent lamp (with magnetic ballast) | |
Strobe depth | 50% | 65% | 55% |
Strobe frequency | 100Hz | 100Hz | 100Hz |
Due to the influence of grid voltage fluctuations, the stroboscopic depth in the above table will actually increase by 10% to 20%.
two. The danger of stroboscopic effects
The stroboscopic effect of the electric light source has caused irreparable serious harm to human production, daily life, and physical and mental health. Mainly in the following aspects:
1. Injury accident: When the stroboscopic frequency of the electric light source is in integral multiple with the speed (rotation speed) of the moving (rotating) object. When the motion (rotation) state of a moving (rotating) object occurs, the static, reverse, motion (rotation) speed is slow, and the above three states periodically repeat the wrong vision, causing a work-related accident.
u For example, the sewing machine operator in the garment industry illusion that the needle moving up and down at high speed is in a static state, and the finger is inadvertently injured.
u For example, the machine tool operator in the machining industry, the illusion is reversed for a forward-rotating turning tool. The emergency reversing operation, damage to the workpiece, the tool, and even cause casualties.
u For example, in the machinery industry, crane operators, for the movement state of the crane and the hook, produce a false vision of slow moving speed and momentary rest. It is difficult to locate, causing operational errors and causing accidents.
u For example, in the machinery industry, the production operator's speed of the flywheel and pulley of the production equipment. Produce false visions such as slow rotation and reverse rotation. Lead to misuse and cause an accident.
2. Caused by low production efficiency: stroboscopic effects can cause visual fatigue and migraine. In particular, the machinery industry uses high-pressure mercury (sodium) lamps, and light industry, food, printing, electronics, textile and other industries, the use of straight tube (inductive) fluorescent lamps is particularly obvious. For example, plug-in operators on the assembly line are prone to migraine headaches due to visual fatigue and vertigo. It is difficult to locate and the production efficiency is low.
3. Adolescents who are growing up hurt their eyes and form myopia. After the 1980s in China, straight-tube (inductive) fluorescent lamps were widely used in homes, schools, libraries, etc. The growing primary and secondary school students suffered greatly, their visual acuity decreased significantly, and myopia increased significantly.
three. Technical analysis <br> mechanism producing a strobe light source technology to produce strobe mechanism, the factors both power supply, but also behind the electric light source technical performance factors, as well as lighting design irrational factors and so on. And it is the result of a combination of many factors, the technical mechanism is more complicated. Due to space limitations, this article only provides a general technical analysis from the perspective of the performance of common electric light source technology.
1. The electric light source power supply frequency is low. Incandescent lamps, high pressure mercury (sodium) lamps, straight tube (inductive) fluorescent lamps. At this stage, most of them are powered by a 50Hz power frequency sinusoidal alternating current directly to the illuminant of the electric light source. The stroboscopic frequency is 50 Hz *2 = 100 Hz, and it fluctuates sinusoidally.
2. The electric light source supply voltage fluctuates greatly. At present, the power frequency AC power supply in China has a transient voltage value fluctuation range of 10% to 20%, which greatly increases the stroboscopic depth with a frequency of 100 Hz and a sinusoidal wave.
3. The performance of electric light source technology is backward. The incandescent lamp is a heat radiating light source that directly heats the filament, and the luminous power of the illuminating body fluctuates with a sine wave law in accordance with the frequency of the power supply. High-pressure mercury (sodium) lamp, straight tube type (inductive) fluorescent lamp, although it is an electric light source for gas discharge illumination. However, due to its start-up and ignition, inductive ballasts are used (the AC-DC-AC frequency conversion function is not available). Therefore, the discharge power of the gas discharge illuminator must fluctuate sinusoidally with the frequency of the power supply.
four. Countermeasures <br> stroboscopic effect of improving the Basic technical measures electrical strobe light, light emission is to improve the driving of the driving power emit light frequencies above 40KHz to reach. From the macroscopic point of view, there are many measures to increase the frequency of the driving electric power for driving the illuminant of the electric light source, but at this stage, some technical measures are impossible to achieve, or the realization cost is high. The most likely, most economical, and most effective way is to choose a new type of electric light source with AC-DC-AC frequency conversion.
Comprehensive considerations, electric light source application environment, luminous bright (brightness), color rendering performance, stroboscopic effect, energy saving effect, performance price ratio, lighting quality and other factors. This paper selects a new type of electric light source with AC-DC-AC frequency conversion function. Huabel three-color high-frequency high-power industrial special energy-saving lamps (referred to as high-frequency energy-saving lamps). Through the scientific lighting engineering design, the choice is to use the lighting fixtures with superior performance. It eliminates stroboscopic effects and creates a bright, comfortable green lighting environment.
The basic principle of high-frequency energy-saving lamps is to use an all-electronic ballast with AC-DC-AC frequency conversion. The 50Hz, 220V power frequency alternating current is rectified into a smooth direct current, and the direct current is converted into a high frequency alternating current of 40 KHz or more by a variable frequency oscillator. It is applied to a trichromatic fluorescent tube to drive a fluorescent tube to discharge light. Due to the high frequency and low fluctuation of the driving electric power, the stroboscopic depth of the fluorescent tube is less than 5%, and there is no stroboscopic effect.
According to scientific calculations, the experiment proves that the electric power frequency for driving the fluorescent tube discharge light should be between 40KHz and 80KHz. Moreover, the higher the frequency within this range, the smaller the stroboscopic depth of the fluorescent tube, the smaller the stroboscopic effect, and the smaller the damage.
It should be specially stated that the conversion frequency of the electronic ballasts that are being sold in the market is not all above 40KHz. Some inferior ordinary energy-saving lamps, the conversion frequency is only about 20KHz, and even as low as 17KHz. Still producing a stroboscopic depth of 2O-3O%, there is still a serious stroboscopic effect hazard.
Fives. in conclusion
The three-color high-frequency high-power industrial special energy-saving lamp is adopted, and the electronic ballast has an AC-DC-AC frequency conversion function. When the conversion frequency can reach 4OKHz or more, the stroboscopic depth can be reduced to 5% or less, and the stroboscopic effect can be eliminated. Moreover, the luminous efficiency of the fluorescent tube can be improved, the power consumption can be reduced, and the brightness can be improved. It is the ideal source for a bright, comfortable green lighting environment.
Qingdao Huabeier Microelectronics Studio High Frequency Light Source Division is a high-tech enterprise specializing in three-color high-frequency and high-power industrial special energy-saving lamps and high-frequency electronic ballasts. The Huabel series of three-color high-frequency and high-power industrial special energy-saving lamps produced by the company use electronic ballasts and AC-DC-AC conversion frequency up to 46KHz. High light efficiency, high brightness, low failure rate and long life. High color rendering, no stroboscopic effect hazard.
Han Yurong 13606306833 (0532) 8760830
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