Overview of YR wound asynchronous motor

The YR series is an optimized series of products established by our company using advanced technology at home and abroad, combined with our practical experience in producing high-voltage motors. It is an upgraded product of JR's old series high-voltage motors.

This series of products uses high-quality materials, is manufactured with excellence, has high performance indicators, low noise and vibration, high reliability, and is easy to use, install, and maintain.

The power level, installation size, and electrical performance of this series of motors comply with the standards of GB/T4772.1-2-1999 "Dimensions and Output Power Levels of Rotating Electrical Machines", GB755-2000 "Rating and Performance of Rotating Electrical Machines", JB/T7594-1994 "Technical Conditions for YR Series High Voltage Three phase Asynchronous Motors", and GB/T13957-2008 "Basic Series Technical Conditions for Large Three phase Asynchronous Motors".

The mechanical dimensions and tolerances of each part of this series of motors comply with the national standard GB/T1800-GB/T1804 "Limits and Fits" and the International Committee for Standardization ISO standard.

The protection level of the casing of this series of motors is P23 and P44 according to GB/T4942.1-2001 "Classification of Protection for Rotating Electrical Machinery Enclosures (IP Code)". If the user requests other protection levels such as IP54 or IP24, they can be negotiated separately.

The cooling method for this series of motors is IC01 according to the standards of GB/T1993-1993 and IEC60034-5 "Cooling Methods for Rotating Electrical Machines". If the user requires other cooling methods, they can negotiate separately.

The basic installation method of this series of motors is a horizontal structure with feet (IMB3), which complies with the provisions of GB/T997-2003 and IEC80034-7 "Rotating Electrical Machinery Structure and Installation Type (IM Code)".

Structure description of YR wound asynchronous motor

The electric motor adopts a box structure. The machine base is a box shaped structure welded from steel plates, which is lightweight and has good rigidity. There are protective covers and cover plates on both sides and the top of the machine base. After removing the protective covers or cover plates, the interior of the motor can be observed and touched, which facilitates maintenance and repair of the motor.

The basic protection level of YR series is IP23; After removing its protective cover and cover plate and installing different top covers and cover plates on the top and sides of the machine base, various types of motors with different protection and cooling methods can be formed.

The stator adopts an external pressure structure. The stator winding is made of F-grade young insulation material, with reliable fixing and binding at the ends, and treated with vacuum pressure impregnation solvent-free paint (VPI) technology. Therefore, the insulation performance of the motor is excellent and reliable, with good mechanical strength and strong moisture resistance.

There are two forms of bearings: rolling bearings and sliding bearings. The protection level of the basic form is IP44 depending on the power and speed of the motor. If the motor has a higher protection level, the protection level of the bearing will also increase accordingly.

The electric motor has a cylindrical shaft extension, with frame numbers 355-500 connected by flat keys and frame numbers 560-630 connected by tangential keys. It can also be manufactured according to user needs.

The main outlet box has an IP54 protection level and is generally installed on the right side of the motor (facing the motor shaft extension end). It can also be installed on the left side of the motor according to the ordering requirements, and there are separate grounding terminals inside and outside the main outlet box.

Application of YR wound asynchronous motor

Electric motors can be used to drive various general machinery such as compressors, water pumps, crushers, cutting machines, transportation machinery, and other mechanical equipment. They are also used as prime movers in various industrial and mining enterprises such as mining, machinery, metallurgy, petroleum, chemical, and power stations. Electric motors used to drive blowers, coal mills, rolling mills, and winches should provide relevant technical information when ordering and sign technical agreements as the basis for special motor design to ensure reliable operation of the motor.

Technical data of YR wound asynchronous motor

The technical data (guaranteed values) of the YR series 6kV three-phase asynchronous motor are shown in Table 1

The technical data (design values) of YF series 10kV three-phase asynchronous motor are shown in Table 1