Introduction： YJ21
     YJ21 motor is squirrel cage variable frequency speed regulating saynchronous motor developed for AC-DC-AC electric drive oil rig123.net' target='_blank'>drilling machine. The motor takes international advanced insulation processes and special measures protecting bars from breaking. Its centerline height and installation dimension are the same as that of imported DC oil rig123.net' target='_blank'>drilling machine. The motor's main features are: large torque, wide range constant power speed regulating, free maintenance, high universality, efficiency and reliability. YJ21 motor can be used as slurry pump motor, rotary table motor or winch motor of AC drive drilling machine.

Parameter：
Rated power: 800Kw
Rated voltage: 660V
Rated current: 850A
Rated rotating speed: 800r/min
Rated frequency: 40.5Hz
Rated power factor: 0.86
Rated efficiency: 95%
Rated torque: 9550N.m
Max.current: 1280A
Max.torque: 14320N.m
Max.con.power rotating speed: 1200r/min
Max.frequency: 61Hz
Insulation class: 200
Cooling method: Forced air
Protection class: plus pressure explosion-proof
Mass: 3000Kg

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