Quincy QGDV series permanent magnet frequency conversion air compressor provides customers with lower total investment cost. A brand new element is more efficient and stable, ensuring lower energy consumption during operation of compressor. The maximum design capacity adjustment of efficient permanent magnet synchronous motor is up to 80%. The motor is also able to accurately control air flow with the help of efficient frequency converter for meeting system load requirements in different environments. It also provides stable pressure and air supply, remarkably reducing energy consumption of the air compressor, with energy savings of 30% or more on average and reducing operating costs.