The YFBBP series dust explosion-proof variable frequency speed regulating three-phase asynchronous motor is a fully enclosed forced air cooling three-phase asynchronous motor, which has good speed regulation performance, energy saving and high efficiency, compact structure, large temperature rise margin, long service life, good performance, small vibration, low noise, advanced explosion-proof structure, beautiful appearance, high reliability, etc. It is also equipped with an non-stop oil injection device and can add functions such as bearing temperature measurement, stator temperature measurement, and moisture-proof heater according to user needs. This series of motors complies with the national standards GB12476.1 "Electrical equipment for use in environments with combustible dust - Part 1: General requirements" and GB12476.5-2013 "Electrical equipment for use in environments with combustible dust - Part 5: Shell protection type" tD ". The electrical performance meets the requirements of Q/320205BABD26-2017 "Technical Conditions for YFBBP Series Explosion proof Variable Frequency Speed Control Three phase Asynchronous Motors (Machine Seat Numbers 80-450)". The explosion-proof markings are Ex tD A21 IP65 T130 ℃ and Ex tD A22 IP55 T130 ℃, used for power dragging in environments with explosive dust mixtures.