Into the summer, to now the device control speed indispensable inverter, the hot weather is the inverter heating injury. A large number of researches and practices show that the frequency converter's failure rate will increase with the increase of temperature, and its service life will decrease with the increase of temperature. For this reason, now we will analyze, caused by the frequency converter overheating fault reasons what, as well as solutions to the corresponding problems:

1, the ambient temperature is too high [ converter supporting equipment ]

Reason: the inverter is composed of numerous electronic components, its work will produce a lot of heat, especially IGBT work in high-frequency state, the heat will be more. If the environment temperature is too high, will lead to the internal components of the inverter temperature is too high, in order to protect the internal circuit of the inverter, at this time the inverter will report high temperature fault and shutdown.

Countermeasures: to reduce the temperature of the place where the inverter, such as air conditioning or fans can be installed forced cooling measures.

2. The inverter has poor ventilation

Reason: if the air duct of the inverter itself is blocked or the air duct of the control cabinet is blocked, it will affect the internal heat dissipation of the inverter, resulting in overheat alarm of the inverter. 

Countermeasures: regular maintenance of frequency converter, cleaning the garbage of its air duct, smooth air duct.

3. The fan is stuck or damaged

Reason: when the fan of the inverter is broken, a lot of heat is accumulated in the inner part of the inverter.

Thus, the maintenance and maintenance of the inverter is particularly important, then how to reduce the failure rate, so that the inverter to spend the summer safely, reduce customer losses? Therefore, now mainly from the following aspects of a brief introduction:

First,Summer inverter maintenance attention to these points:Suitable temperature, humidity, ventilation, dust-free and interference-free, the inverter for internal and external cleaning.

Second, direct impact on the main aspects of the inverter heat?

1, FAN operation protection, frequency converter built-in fan is the main means of internal cooling box, it will ensure the normal operation of the control circuit. Therefore, if the fan is not working properly, it should be immediately maintained.

2. The inverter module is the main part of the inverter which generates heat, and it is also the important and fragile part of the inverter. Therefore, each inverter is equipped with a thermal protection device in the heat sink.

3. The inlet and outlet of the cooling air duct shall not be blocked, and the ambient temperature may be higher than the allowable value of the inverter. Some solutions to the problems and suggestions for improvement are put forward, which is of some reference value for the application of frequency converter in practical engineering.

4. We should pay attention to the interference of the inverter to the microcomputer control board. The process level of the microcomputer control board designed by the user is poor, and it does not conform to the EMC International Standard.

Three, summer maintenance and maintenance of inverter to note:

1, check the running state of the inverter, running voltage, current value is within the normal range. 

2,Carefully monitor and record the ambient temperature of the inverter room. The ambient temperature is usually between -10 ° C and 40 ° C. The temperature rise of phase-shifting transformer can not exceed 130 ° C. 

3, avoid direct sunlight, damp, there are drops of water, summer is rainy season, should prevent rain into the inverter internal (such as rain into the wind outlet) .

4, inverter installation: 

(1) summer temperature is higher, should strengthen the inverter installation site ventilation cooling. Ensure that the surrounding air does not contain excessive dust, acid, salt, corrosive and explosive gases. 

(2) in order to keep good ventilation, the distance between the inverter and the surrounding barrier should accord with: both sides ≥125px, upper and lower ≥300px. 

(3) in order to improve the cooling effect, all inverters should be installed vertically, in order to prevent foreign matter from falling in the outlet of the converter and blocking the air channel, * good above the outlet of the converter to install a protective screen. 

(4) when two or more inverters are installed in a control cabinet, they should be installed side-by-side (in horizontal arrangement) as far as possible, or a diaphragm should be installed between the two inverters if vertical arrangement is necessary, to avoid the hot air from the following converter into the above converter.

5,According to the site environment, regularly clean the fan, air duct, prevent clogging, especially in the textile industry, cotton more, to clean regularly, but we need to pay attention to the need to clean the fan air duct is strictly prohibited live operation, pay attention to safety. 

6,Regular inspection of the inverter ventilation and cooling equipment to ensure normal operation, especially the converter's own fan, then how to determine whether there is a problem with the fan? 

(1) look at the appearance of the fan, see if the fan power line is broken, see if the fan blade is broken, 

(2) listen to the fan if there is any abnormal sound.

Source: internet (for study only, intrusion and deletion)