light industry

    We after a lot of maintenance of inverter feel: if people in the use and maintenance of frequency converter can pay attention to avoid some errors, remove some of the wrong attitudes, so for the use of frequency converter and maintenance will be highly beneficial.

一、Frequency devices do not have to be installed in the vibration of the equipment, because the inverter which is easy to loosen the main loop of the screw, there are a lot of frequency converter for this reason and damage.
二、Wiring problem: the input terminal of the inverter is best connected with the beginning of an air to protect the current value can not be too large, in order to prevent the occurrence of short circuit burned not too serious. Must not be the "N" terminal grounding. Control line as far as possible not too long. Because this makes the control board susceptible to electromagnetic interference and produce false action, it will cause damage to the control board, more than 2 meters long the best use of shielded wire. The inverter is not equipped with a large current and regular action of the contactor, because it is very large inverter interference, often make the inverter malfunction (display all kinds of faults).
三、Often need to stop the inverter is best not to rely on the inverter itself brake, but also add the brake or the use of mechanical brake, or the inverter is often affected by the motor counter electromotive force, the failure rate will be greatly improved.
四、If the inverter is often low speed running 15HZ, then the motor to add cooling fan!
五、Dust and humidity is the most deadly killer. Best can drive is installed in the air-conditioned room, or installed in the dust into account net electrical cabinet, from time to time to clean the dust on the circuit board and a radiator; down converter for a period of time before electricity is best to use hair dryer blowing about circuit board.
六、Certain brands of inverter when the cooling fan is broken, it will not overheat protection, until the converter is damaged, so when the fan has the sound should be replaced.
七、Some factory power supply is the generator power generation, the voltage is not stable, the frequency changer is often damaged, the generator is equipped with the steady voltage or the overvoltage protection device, the effect is very good.
八、Lightning protection is also very important. Although rarely happens, but when the inverter is struck by lightning, will be damaged. Constant pressure water supply of the inverter is most likely to be struck by lightning, because it has a lead mine into the sky.
九、For preventing interference of electromagnetic wave, inverter input, output, control line is best to use shielded wire, shielding layer wiring method can't be wrong, or the opposite effect, may use iron trap and installing filter, the lower carrier frequency. We found that if the inverter switching power supply switch tube is a field effect tube (such as the K Series), the interference will be greater.
十、When the inverter is bad, don't give it to people who don't have the repair experience! Otherwise it may be worse! Sometimes fast fusing, we must check whether there is a problem, and some electrician without experience, and immediately put on a good fast melt (absolutely can not replace the copper wire), the result is more powerful inverter burning. According to our experience, if the fast fuse is mostly a problem, but the module is not a bad fast melting. A lot of converter power module, rectifier module can be replaced with each other.
十一、We in the maintenance of frequency converter in the process, often encounter some plant maintenance and blow up converter and damage than the original more severe, more difficult to repair. Upon examination, the original is used to repair the module. Repair the module instrument is difficult to detect, each parameter is completely normal, but due to its internal wiring of rough, transistors sealing grease will be open when you don't seal, such a module some can in a few months, some boot of blowing up.
     Some of the views put forward by the inverter can be inspired by the user, and to avoid some of the problems should not arise, we will feel very pleased.