Overview of YRKK wound asynchronous motor

The YRKK series 6kV medium-sized high-voltage wound rotor three-phase asynchronous motor (center height 355-1000) is an optimized series product 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 GB/T4772.1-2-1999 "Dimensions and Output Power Levels of Rotating Electrical Machines", GB755-2000 "Rating and Performance of Rotating Electrical Machines" standards, and JB/T10314.2-2002 "Technical Conditions for YRKK, YRKK-W Series High Voltage wound rotor Three phase Asynchronous Motors" standards. GB/T 13957-2008 "Basic series technical specifications 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 IP44 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, they can negotiate separately.

The cooling method for this series of motors is IC611 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 IEC60034-7 "Rotating Electrical Machinery Structure and Installation Type (IM Code)".

Structural description of YRKK 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 YRKK series is IP44; There is an air/air cooler installed on the top of the motor.

The stator adopts a sliding type external pressure structure. The stator winding is made of F-grade low adhesive 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.

Bearings come in two forms: rolling bearings and sliding bearings, depending on the power and speed of the electric motor. The basic form of protection level is IP44, and when the motor has a higher protection level, the protection level of the bearing also increases 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 YRKK 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. In mining, machinery, metallurgy, petroleum, chemical, and protocol industries, they serve as the basis for special motor design to ensure reliable operation of the motor.

Technical data of YRKK wound asynchronous motor

The technical data (guaranteed values) of YRKK series 6kV three-phase asynchronous motors are shown in the table

The technical data (guaranteed values) of YRKK series 10kV three-phase asynchronous motors are shown in the table