In recent years, the frequency conversion technology of range hoods has gradually matured. Compared with ordinary AC motor range hoods, the biggest difference of DC motor range hoods is that DC motor range hoods are more energy-efficient, more efficient, and have lower noise. The full voltage efficiency of DC frequency conversion motor range hoods is 32%, far higher than the national standard of 25%, saving more than 30% compared to the same period last year. In addition, due to environmental issues in Chinese kitchens, new tests have been put forward for the motor performance of range hoods. Traditional fixed frequency motors form oil stains between the stator and rotor, which can cause heating and greatly reduce the service life of the motor. DC variable frequency motor range hoods have better sealing performance. Under the action of the variable frequency controller, it can ensure more accurate voltage and current parameters of the range hood, thereby extending the comprehensive service life of the range hood.