This requires us to have a keen eye and carefully observe the external technology and internal strength of the inverter when choosing it. Inverter identification method:

How to judge the quality of an inverter

The first thing that power inverters give people is the visual impact of their appearance, just like a phone, giving them a first impression. A good inverter has a novel appearance and a unique streamlined body, which looks more tense. This type of shell design requires shape design, molding, and layout of internal components. After mass production, the cost has already been very high. Generally, imported brand frequency converter companies invest a lot in this area. For example, ABB frequency converters are very slender, Fuji frequency converters are large, and Siemens frequency converters are heavy, all of which have their own characteristics.

Which brand of mold is the shell template made of, and whether it is an outdated model, can distinguish the potential of this manufacturer. The appearance is not actually the most important thing. The workmanship can show a brand's strength, and details such as the material and flame retardant value of the shell can roughly distinguish the cost. When opening the shell, check whether the layout of the circuit board inside is reasonable, and whether the steps to open the shell and circuit board are user-friendly. Some inverters cannot be opened at all and do not have screws attached. How can I open it for repair?

The workmanship of the circuit board is also clear at a glance, including whether it is machine mounted, whether it has three proofing paint, how many layers of the circuit board, whether there are solder joints, and whether copper wires pass back and forth through the circuit board, all of which indicate that a company is on the circuit board. The power of design layout. Poor layout can also bring hidden dangers to the inverter.

Then, it depends on whether the inverter module is an imported brand. The current value of the module directly affects the service life of the inverter, as well as the capacitance of the inverter. Whether the production capacity is sufficient depends on whether the brand is a big one. These will also affect the performance of the frequency converter. Finally, take a look at the air duct of the inverter. The reasonable design of the air duct can greatly improve the heat dissipation capacity of the frequency converter. Frequent faults occur.

If the inverter hardware is similar, software issues must be considered. Generally, frequency converters are modified using imported brand software to meet the requirements. However, some manufacturers do not have source code and cannot modify the content of the main program, so the performance of the frequency converter cannot be improved. At present, there are not many manufacturers in China that can change the algorithm of frequency converters. They only use the previous main program to change parameters to achieve the best results.

The most direct method to test the quality of inverter software is to add load testing. Low frequency and high torque are direct and effective methods for testing inverter algorithms. After changing the parameters, adjust the frequency converter within 5HZ to see if the torque of the load motor has decreased., Check whether the motor speed is uniform, then observe whether the output waveform of the frequency converter is perfect, and frequently start and stop to check the peak current and voltage in a short period of time. These methods can all verify the performance of the frequency converter software.