Abstract : This article discusses the daily maintenance and periodic inspection of frequency converters based on practical work experience and relevant data, and provides relevant examples. Keywords : Frequency converter, daily maintenance, periodic inspection, IGBT The promotion and application of frequency converters has brought about a huge revolution in industrial development, rapidly improving work efficiency. Previously complex, cumbersome, and redundant controls have become extremely simple, and even controls that were considered impossible by predecessors have become possible. Its wide range of applications is astonishing, and it can be seen in many industries such as medicine and health, machinery, power, electronics, textiles, agriculture, beverage, and energy. 1. Daily maintenance and inspection of frequency converters are necessary Like other electronic devices, frequency converters require daily maintenance and periodic inspection, and this is indispensable. The reliability and longevity of a frequency converter's operation are closely related to whether it undergoes daily maintenance and periodic inspection. Especially for some less mature domestic products, which are still in the imitation stage, their frequency converters lag behind well-known brands in terms of protection capabilities and component selection, making daily maintenance and periodic inspection even more important. Inverters are static devices centered around semiconductors. Due to the influence of environmental factors such as temperature, humidity, and dust, as well as the aging of their components over time, routine maintenance and periodic inspections are essential to ensure the normal operation of inverters. [b][align=center]For details, please click: Routine Maintenance and Periodic Inspections of Inverters[/align][/b]