According to the test, the service life of the inverter is halved for every 10°C increase in the operating ambient temperature. Therefore, in the daily operation, a reasonable maintenance cycle and guidelines should be formulated according to the actual operating environment and load characteristics of the inverter, and after each operation cycle, the inverter should be fully protected once as a whole, such as dismantling, viewing, and measuring, so that the hidden dangers can be found and dealt with in the early stage.
(1) Regularly (according to the actual environment to determine the length of its cycle distance) to carry out a comprehensive inspection and protection of the inverter
If necessary, the rectifier module, inverter module and the circuit board in the control cabinet can be disassembled, viewed, measured, dusted and tightened. Because the air inlet and progress air outlet under the inverter are often blocked due to dust accumulation or excessive dust accumulation, its own heat dissipation is high, and the ventilation volume is large, so after the operation must be time, there is dust on the circuit board (due to static electricity), which must be cleaned and checked.
(2) After repairing the circuit board and busbar, the necessary anti-corrosion treatment should be carried out
Insulating paint should be painted, and the burrs of the busbar that had been partially discharged and arced should be removed and insulated. For the insulating column that has been insulated and broken down, it must be eradicated and carbonized or replaced.
(3) Check and tighten all terminals to prevent serious heating caused by loosening
(4) Conduct a comprehensive review of the large equipment
Conduct a comprehensive inspection and parameter measurement of the input (including output) terminal, rectifier module, inverter module, DC capacitor and fast-melting equipment, and replace the incinerated equipment or the equipment with large parameter changes if found.
(5) Always carefully check the fan rolling situation in the inverter and roll the fan blade by hand after power failure, investigate whether the bearing is stuck or the rolling is inflexible, and replace it if necessary
(6) Carefully check the electronic components on the control circuit board
Check and deal with abnormal phenomena such as desoldering, discoloration, bulging, cracking, and broken wires (printed board lines), and if necessary, the components with abnormal appearance can be viewed or replaced from the desoldering measurement on the circuit board.
(7) Protection of electrolytic capacitors
Because the electronic components of the inverter are designed to consider the problem of capacity decline caused by aging, it is not necessary to replace the capacitor with reduced capacity immediately in repair. In practice, the decrease in capacitance capacity is directly related to the inverter's operating environment, load size, working system, etc., and the harsh environment, the larger the load, and the frequency of stopping and starting, etc., will accelerate the aging of the DC main capacitor. In addition, during regular protection, it is necessary to check in detail whether the main DC circuit capacitor has leakage, whether the shell is expanded, bubbling or deformed, whether the safety valve is flushed open, and the capacitance capacity, leakage current (the leakage current will overheat the capacitor, causing the safety valve to burst open, and even the capacitor explosion), withstand voltage, etc., and replace the capacitor with a capacitance decrease of more than 30%, a leakage current of more than 70mA, and a withstand voltage of less than 650V. For new capacitors or capacitors that have not been used for a long time, functional tests should be carried out to meet the requirements of the use before they can be replaced.
(8) For rectifier block, inverter GTR (or IGBT) and other large ampacities equipment, use multimeters, bridges and other instruments and tools to detect and withstand voltage test, measure their forward and reverse resistance values, and make table records, and replace the modules with large parameter differences.
(9) Check the main contactor and other auxiliary relays, carefully investigate whether the dynamic contacts of each contactor have arcing, burrs or surface oxidation, unevenness, and find that the corresponding dynamic contacts should be replaced to ensure that their contacts are safe and reliable.
(10) Always check the degree of power supply voltage fluctuation, improve the inverter operating environment and the phenomenon of large load fluctuations, and avoid the impact of large current on the inverter.
|
More on that
|
Sunland proposed a multi-machine parallel high-voltage shore power supply system solution
Air pollution in port cities mainly comes from cargo loading and unloading operations and emissions from ships calling at ports; Shore power connection refers to the closure of the auxiliary engine during the port of the vessel, and the shore power is supplied by the port.
At 9:08 on December 25, 2018, the world's first ...
|
|
The difference between strong and weak inverter - Sunland inverter
The inverter includes a rectifier circuit and an inverter circuit, and the input communication electricity is converted into DC voltage through the rectifier circuit and flat-wave circuit, and then through the difference between strong and weak current, it is mainly reflected in the different uses. Strong electricity is used as a kind of power power, and weak electricity is used for information transmission. In detail ...
|
|
Sunland inverter soft start advantages
Sunland inverter and soft start is a first-class, reliable and reliable motor control system, which is able to meet the needs of various applications. The advantages of expected Sunland inverters and soft start are:
1. Performance: Expect Sunland inverter and soft start...
|
|
Hope Senlan inverter selection
Hope Sunland inverter is a high-performance inverter product, which has high operational reliability, high energy efficiency, strong control performance and long service life. Hope Sunland inverter has been widely used in industrial process production control, machinery control, water treatment, construction and transportation and other fields. This article will start with ...
|
|
Inverter maintenance and cleaning inspection method - Senlan inverter
There are many special faults, which come and go, looming, making it impossible to judge and deal with. At this time, you can clean the circuit board with water or alcohol, and brush off the dust and rust on the circuit board with a soft brush, especially pay attention to the solder joints are dense, and the circuit near the 0 volt copper layer is also ...
|
|
The reason for adding a frequency converter to the crane control system - Senland
Prior to the introduction of frequency converters, overhead crane operators operated the cranes using contactor-based controls. For low-cycle cranes, the system is equipped with a single or two-speed motor. For cranes with higher load cycles, they use so-called wound rotor motors.
...
|
|
Characteristics of two-phase electric fan inverter - Sunland inverter
The digital signal processor is selected, and the work efficiency is higher
A good quality two-phase electric fan inverter uses a digital signal processor, which can make the work efficiency higher, that is, it may take 3 hours to complete the work, but now it only takes 2 hours to be able to...
|
|
The main step of inverter debugging - Sunland inverter
Investigation of the function of the inverter system
Before debugging the frequency converter, it is necessary to carefully read the operation instructions and related information of the inverter to be debugged to understand the application environment and precautions. Especially before the inverter is energized, it is necessary to carefully observe and see if the inverter has obvious problems.
|
|
What should I do if I forget the password?
With the passing of time, the inverter has now fully penetrated into the work of major industries. In our daily use, we will inevitably encounter all kinds of problems. For example, I forgot the cipher code of the inverter.
See here ...
|
|
Hope the advantages of Sunland inverter soft start
It is hoped that Sunland inverter and soft start is a first-class, reliable and reliable motor control system, which can meet the needs of various applications. The advantages of Hope Sunland inverter and soft start are:
1. **Sex: I hope that Sunland inverter and ...
|
|
Analysis of the causes of bearing damage - Hope Sunland
In the process of using bearings, often due to some external factors cause some wear in the rotation of the bearing, and these bearing wear will be completely damaged in the addition of day by day, which requires our maintenance personnel to replace the bearing, and generally form a bearing.
|
|
Inverter parameter setting - Sunland inverter
There are many setting parameters of the inverter, each parameter has a certain selection scale, and the inverter can not work normally due to the improper setting of individual parameters in use, so it is necessary to set the relevant parameters correctly.
...
|
|
PLC control belt conveyor soft start method
Belt conveyor is a kind of continuous conveyor, which is one of the main types of fixed or escorted cranes. Belt conveyor is the use of friction to convey the dynamic, with belts, steel belts, steel fiber belts and chemical fiber belts as a kind of compliance with the transmission of materials and traction operations.
|
|
Inverter protection and braking force issues – Sunland
1. What is regenerative braking?
If the motor decreases the command frequency during operation, the motor becomes an asynchronous generator and works as a brake, which is called regenerative (electrical) braking.
2. Can you get more braking power?
Regenerated from the motor ...
|
|
I/O (Input/Output) Selection – Senland
In the 90s of the 20th century, PLC has formed a variety of PLCs: micro, small, medium, large and giant. According to the number of I/O points, it can be divided into five types: micro PLC (32 I/O), small PLC (256 I/O), medium PLC (1024 I/O), large PLC (4.69 I/O), and giant PLC (8195 I/O).
...
|
|
Learn the way of inverter - Senlan inverter
The inverter is an essential accessory in industrial use, and its main function is to regulate the speed of the motor. It is widely used in various equipment such as production F-line and machine tools. Many engineering people have touches.
The functions of the inverter are many, the parameters are complex, and it is difficult to play without professionals. ...
|
|
Senlan inverter motor failure analysis
1. The motor slows down too slowly
1) If the deceleration time is set too long, reduce the deceleration time
2) Install a braking resistor
3) Add DC braking
2. The motor is overheated
1) The load is too large, and the practical moment has exceeded the ...
|
|
Sunland attended the 2015 Industrial Automation Exhibition in Nuremberg, Germany
November 24, 2015 - November 26, 2015, "Germany Nuremberg Industrial Automation Exhibition" was successfully carried out at the Nuremberg International Exhibition Center in Germany, and it is expected that Sunland as a domestic professional inverter manufacturer also participated in the exhibition, in this exhibition, in addition to the usual SB70, ...
|
|
What is the energy feedback of the inverter - Senlan inverter
The essence of energy feedback is active inverter, and the realization method of energy feedback of general inverter is to feed renewable energy to the grid with an anti-parallel three-phase inverter at the uncontrolled rectification of the pre-stage of the general inverter. The main circuit of the energy feedback equipment is mainly composed of thyristors, IGBTs and IPM modules.
|
|
PLC and inverter connection control method - Senlan inverter
There are three connection control methods between PLC and inverter:
1. Use the analog output module of PLC to control the analog output module of the inverter The analog output module of the PLC outputs 0-5V voltage signal or 4-20mA current signal, which is used as the analog of the inverter.
|
|
Contact
working hours
