YVF2 series motor is totally enclosed, compulsive special used motor. By using variable-frequency motor of different poles, it can achieve stepless speedgoverning when the wide speed range is 100rpm-3550rpm. It is applied to the fields of fan, pumps, pipeline automation equipments and machine tools(such as numerical control machine tool and machining center) in the industries of metallurgy, chemical, textile, pharmacy, printing and So on.