IEC High Voltage Induction Asynchronous Squirrel Cage AC Modular Motor for Power Station Coal Milling
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General Description
The power degree, electric property, mounting size and tolerance of the three-phase asynchronous motor for YTM,YHP and YMPS series coal-grinders are in accordance with the National standard GB755<The rate and property of the rotating electric motor>. The International Electric committee standard IEC34-1 <The rate and property of the rotating electric motor>and the machinery Trade standard JB/T7128-93<The specification of the YTM,YHP,YMPS series three-phase asynchronous electric motor used for coal grinder>.
The YTM series electric motor is matched specially with the tubular shape coal grinder; YHP series is matched with bowl shape coal grinder and the YMPS series is matched specially with MPS bowl shape coal grinder.
The protection degree of motor's case is IP54; the cooling mode is IC611 (air-air cooling).we can provide IC81w cooling mode (air-water cooling) in accordance with the request of customer; the mounting mode is IMB3, the rated voltage are 6kV or 3kV and 380V; the rated frequency is 50Hz; the work system is continuous (S1).
Structure description
The motor adopts the internationally popular box structure; the frame and the end cover are all welded by steel plates, which have good rigidity and light weight. After removing the protective cover (or cooler), you can observe and touch the inside of the motor to facilitate the installation and maintenance of the motor.
The stator adopts an external press-fit structure. The stator winding adopts Class F insulation material and anti-corona material. The winding end is fixed by special lashing process, which is firm and reliable. The whole stator is treated with vacuum pressure impregnated Class F solventless paint (VPI). Thus, the motor has excellent and reliable insulation properties and moisture and impact resistance.
This series squirrel cage rotor low power specification motor adopts cast aluminum rotor, no copper strip rotor broken strip phenomenon, reliable operation; high power specification motor adopts copper strip rotor, squirrel cage copper strip rotor adopts advanced and reliable welding rod technology, and through slot Internal fastening treatment.
Bearings are available in both rolling and friction bearings, depending on motor power and speed.
Motors with rolling bearing structure have non-stop refueling and oil draining devices, and are equipped with special refueling tools.
The main terminal box is sealed and has a degree of protection of IP54. It is usually mounted on the right side of the motor (from the shaft end) and can be mounted on the left side according to user needs.
The cable entry hole can be switched upwards, downwards, left and right and there is a separate ground terminal in the box.
The implication of the symbol
Details
- Frame sizes: 400-800mm
- Rated output: 160-1800kW
- Voltage: 380V, 3kV, 6kV
- Frequency: 50Hz
- Insulation class: F
- Number of poles: 6, 8,10
- Degree of protection: IP54
- Duty cycle: S1
- Rotor: Squirrel cage
- Bearing: Rolling bearing or sleeve bearing
- Enclosure:IC611 / IC81W
Features
High efficiency, energy saving, low vibration, small size, light weight, reliable performance and easy installation and maintenance. The stator winding is F grade insulation at the winding's end part being firm banded. The whole stator has been treated with VPI technology to make stator with a robust body and good electric and moisture proof. The frame adopts the welded box structure of all steel plates and the structure design of the hoisting type frame has good rigidity.
Applications
Ideal for coal mill.
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