Some products must be carefully placed to avoid some environmental conditions, especially electrical and electronic equipment. Everyone knows that sometimes we buy some things with some precautions. Like some flammable items will write this away from the fire source to avoid some explosions, etc., then what environmental conditions need to avoid the installation of variable frequency power supply? In order to make the instrument work for a long time, you must keep in mind the following environmental conditions.
First, prevent direct sunlight, rain or wet places.
Humidity and humidity can penetrate into the porous data, forming a leakage path between the conductors, generating oxygen, and the moisture absorption of the parts reduces the insulation resistance, and the isolation withstand voltage drops. However, excessive boring can make certain materials brittle, rough, and even static. Therefore, the consumer environment will also have a certain impact on the reliability of the variable frequency power supply. The consumption of most power modules is to solder the components to small PCB boards (printed circuit boards), and then fill the small PCB boards with resin into the housing. In consumption, if the ambient humidity is high, especially in the south when the drought is dry, the moisture in the air will condense on the PCB board and components. Even when the resin is potted, the bubbles are removed by the vacuum defoaming process. Moisture removal on PCB boards and components. When the power module task is at a higher ambient humidity, the moisture on the PCB board and components vaporizes and expands, causing cracks in the power module, breaking the external components or forming moisture outside the module, and lowering the requirements of the power module. Moisture on the PCB and components also reduces the isolation of the power module, and even forms a breakdown between the primary and secondary, with serious results. Too low humidity will also cause too much dust to float in the air, affecting the quality of the power module. Too low humidity can also cause electrostatic charge due to the movement of people. Even after maintenance by the electrostatic protection system, static damage or soft breakdown of components can be formed, resulting in the same result as described above. The introduction of air conditioning systems and dehumidification systems in the consumer environment can maintain the humidity of the consumer environment at an appropriate level to prevent adverse effects on the reliability of the power module due to condensation of water or excessive air.
Second, please stay away from fire and high temperature to prevent the machine from overheating.
Temperature: The temperature of the consumer environment is strictly controlled. High temperature and high temperature have different levels of influence on components.
1. The high temperature environment will change the parameters of the power supply's resistance, inductance, capacitance, electric power series and other electrical functions, making the insulator soft and forming insulation failure; the active component can be structurally invalid due to expansion and jamming, and the coating surface is foamed. Oxidation and other chemical reaction deceleration, lubricant viscosity decreases and evaporation loses lubricity; wear of moving parts is increased due to physical expansion and structural strength is lowered.
2. The high temperature and high temperature environment will make the plastic box rubber of the power supply lose flexibility and become brittle. When there is moisture, it will freeze, the lubricant will become gelatinous and lose lubricity; the surface will be cracked; the structure will be due to physical expansion. Failure, alteration of electrical and mechanical functions, etc.
3. Temperature control power modules, especially small-sized 1W, 2W power modules, often use a disk wound transformer with an inner diameter of less than 5MM. Winding such transformers can only be consumed by hand. When the consumption temperature is high, the employees' palms are consumed. Will sweat, when winding the transformer, the sweat on the hand of will remain on the transformer, the moisture and salt will damage the paint, reduce the insulation of the transformer, and the power module will be secure. Sexual formation of potential effects. In the consumer workshop, the air conditioning system temperature control system ensures that the humidity of the workshop is maintained at about 26 degrees, so that the consumer employees have a cool and comfortable environment, and then they can consume the power module products with reliable quality.
3. When handling or repairing, first shut down and assemble the power cord.
Storage and storage, improper storage and storage are another important reason for the formation of structural reliability reduction or failure. It is necessary to pay attention and take corresponding measures. If the temperature and humidity of the warehouse should be controlled within the scope of the rules, use a moisture-proof box, pay attention to moisture, anti-static, should not make harmful gases exist, and stop re-examination during the current period. The container of the register member should be made of materials that are not easy to be electrostatically charged and are not easy to cause chemical reaction of the components, and reflect sensitive components during the period. Electronic original data handling and pick-and-place should also pay attention to light handling, ceramic capacitors, magnetic data, etc. are all the original information that is easy to break, especially when using and handling.
As a source of energy for electronic equipment, power supply has become a very important or even the most critical component in electronic systems. The reliability of power modules has also increasingly attracted the attention of consumers of electronic equipment, which has also raised the need for power module manufacturers. High requirements, assessment of the consumer environment, and assessment of consumption management are also listed as important components of supplier evaluation.
Summary: The above three points are things to avoid when the variable frequency power supply is installed. Avoiding these three points can make your instrument last longer.
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