How to carry out the normal selection and capacity matching of the inverter - News - Global IC Trade Starts Here.

Here is the rewritten and improved English version of your content, with added details to reach over 500 characters and make it sound more natural and human-like: --- Selecting the right inverter is a critical challenge for engineers and professionals involved in industrial automation. Simply choosing an inverter based on its rated power is not sufficient—it’s essential to consider how well it matches the actual load and operating conditions. When selecting an inverter, always use the actual motor current as the main reference, rather than relying solely on the motor's rated power. Inverters produce higher harmonic content, which can reduce the motor's power factor and efficiency. Therefore, it's important to account for these effects during the selection process. If the inverter will be used with long cables, consider upgrading the inverter by one size or adding an output reactor to minimize voltage spikes and protect the motor. When multiple motors are connected in parallel, ensure that the total cable length remains within the inverter's acceptable range. In special environments—such as high temperatures, high altitude, or high switching frequencies—the inverter may need to be oversized to compensate for reduced performance. For high-speed motors, a slightly larger inverter is recommended. Similarly, when controlling pole-changing motors, ensure the inverter's maximum current rating is not exceeded. Explosion-proof motors require inverters to be placed outside hazardous areas, as standard inverters do not have explosion-proof designs. For gear reduction motors, check the lubrication system limitations and avoid exceeding the maximum allowable speed. When driving wound rotor asynchronous motors, ripple currents can cause overcurrent trips, so a larger inverter is often necessary. Synchronous motors typically see a 10–20% reduction in output capacity when driven by an inverter compared to standard power supplies. For loads with fluctuating torque, such as compressors or vibration machines, select an inverter with a higher rated current than the peak demand. High starting currents in devices like Roots blowers also require careful inverter sizing. Always verify that the inverter's protection level is suitable for the installation environment. Single-phase motors are generally not compatible with inverter drives due to their design limitations. To ensure a reliable variable frequency drive system, proper inverter sizing and matching are essential. Understanding the nature of the load helps determine the appropriate inverter type. For constant torque applications, choose an inverter with strong overload capability. For square torque loads, such as fans and pumps, select an inverter with M ∝ n² characteristics. For constant power loads, like machine tools, ensure the inverter can handle varying torque and speed requirements efficiently. By following these guidelines, you can optimize the performance and reliability of your inverter-based systems.

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