1: The output of the inverter is a PWM wave, which contains more high-order harmonics. The variable frequency power sensor performs AC sampling on the input voltage and current signals, and then passes the sampled value through a transmission system such as cable and optical fiber and the digital input variable frequency power analyzer. The digital input variable frequency power analyzer performs sampling on the voltage and current sampling values Calculation, can obtain the voltage effective value, current effective value, fundamental voltage, fundamental current, harmonic voltage, harmonic current, active power, fundamental power, harmonic power and other parameters.

2: As far as the domestic inverter market pattern is concerned, industry insiders summarize it as that domestic companies in the general field of inverters account for more than 80% of the market share, and fierce competition has led to a significant price decline in 10 years; high-performance markets are still dominated by foreign brands In the future, it will become the main direction of domestic inverter companies. It is a high-tech enterprise integrating domestic R&D, production and sales of intelligent electrical equipment. Manufacturers of industrial automation control such as frequency converters, motor soft starters, etc., products adopt heavy-duty design, strong overload capacity, with large starting and running capacity, perfect automatic detection, protection and control performance, can start and control any Type of heavy-duty motors, products have been widely used in all industrial transmission fields such as metallurgy, mining, papermaking, chemical industry, building materials, machinery, electricity, and building systems

3: The Chinese inverter market maintains a growth rate of 12-15%, and it is expected that it will maintain a growth rate of more than 10% in at least the next 5 years. The growth rate of the installed capacity (power) of the inverter in the Chinese market is actually around 20%. It is expected that the inverter market will be saturated and gradually mature at least 10 years later.