I. Overview
YR series wound rotor three-phase asynchronous motor is an optimized series of products developed by our company after digesting and absorbing the design and manufacturing technology introduced from Westinghouse of America and LDW of Germany, and combining our more than 70 years of long-term stable design and manufacturing experience of high-voltage three-phase asynchronous motor, and can have YRKK and YRKS series according to different cooling methods to meet the requirements of different cooling methods.
This series motors can be widely used to drive many kinds of general-purpose machines, such as compressors, pumps, crushers, cutting machines, transportation machinery, coal mills, steel rolling mills, winches, belts, hoists and other heavy load machines. It is widely used in various industrial and mining industries such as mining, machinery industry, petrochemical industry, power plant, etc. as the prime mover.
II. Advantages and Characteristics
1. The insulation level of this series motor is F grade, using the domestic first-class rubber less insulation system. Using high-quality mica tape, environmental protection impregnating resin paint, in the CNC winding machine, pulling machine and wrapping machine to complete the coil production, and finally by VPI vacuum pressure impregnation treatment. It is characterized by low normal dielectric loss, low high temperature dielectric loss, low leakage current of the whole machine, and very low voltage drop rate in thermal aging. Therefore, the coils are well made, with excellent and reliable insulation performance, good mechanical strength, and strong moisture resistance.
2. After absorbing and digesting the advanced technology at home and abroad, the company uses the "field and circuit" combination method for the electromagnetic design of this series, which improves the calculation accuracy of electromagnetism and can provide accurate maximum torque multiplier, and the overload capacity of the motor is effectively guaranteed. Using FEM mechanical analysis method for structural design, and constantly verified by practice, can accurately apply boundary conditions to the established mechanical model, thus solving the accuracy of material use, control the vibration and noise of the motor; at the same time, FEM mechanical analysis method is applicable to various cooling methods, high accuracy and intuitive air volume distribution, improve the level of temperature rise calculation in motor design, reduce ventilation loss, and improve motor efficiency.
FACTORY PHOTOS
Raw Materials
Frame: Cast iron, steel
Stator: Copper
Rotor: Copper/aluminum
Shaft: 45# Steel
Bearing: SKF, or equivalent
In-process Inspection/ Quality Control
All the measuring apparatus and instruments are calibrated each year.
Quality control for each item
| Part |
Inspection item |
| Coil |
1. Physical and chemical tests for raw materials |
| 2. Coil winding process inspection |
| 3. Winding dimension inspection |
| Iron Core |
1. Physical and chemical test report for silicon steel sheet material |
| 2. Lamination burrs and paint film inspection |
| 3. Dimensional inspection of laminated steel sheet |
| Frame |
1.Cold welding parts conformity certificate |
| 2. Finish machining inspection |
| Rotor |
1. Rotor core lamination inspection |
| 2. Conducting bar welding |
| 3. Check the material, appearance, conductivity and size of the conducting bar end ring |
| 4. Check the fastening of the conducting bars in the slots |
| 5. Dimensional check, including iron core outer diameter |
| 6. Dynamic balance correction |
| Shaft |
1. Raw material , annealing check |
| 2 Finish machining check |
| Stator |
1. Iron core compactness check |
| 2. Check iron core length and section length |
| 3 Inserting winding check |
| 4. Iron consumption check |
| Assembly |
- Plain bearing size and surface quality check
|
| 2. Check the size of the air gap, the coincidence of the axial centerline of the stator and rotor core, the gap of inner fan and windshield |
| 3 Cleaning check inside the motor |
| 4 Shaft center height and installation size check |
| Test |
1. Routine test |
| 2. Type test |
Test Items
Each motor must be tested before leaving the factory. After the motor is qualified, the motor can be shipped out. Each motor will have a test report.
Routine test items
Winding three-phase DC resistance
Winding insulation resistance to ground
Winding withstand voltage test
No-load current
No-load power
No-load loss
Three-phase no-load current imbalance
Locked rotor current
Locked rotor torque
Maximum torque
Rotation direction
Vibration: horizontal, vertical, axial
Noise
Type test items
Full load input power
Full load current
Stator winding loss
Rotor winding loss
Iron loss
Mechanical loss
Other losses
Full-load slip ratio
Stator winding temperature rise
Bearing temperature
Thermal winding insulation resistance
Overload test
Full-load power factor
Efficiency
Paintings
Standard painting thickness: 120microns (40 micron priming paint and 80micron finish paint)
With professional painters, we can mix and paint any color according to your choice.
Packaging
Standard seaworthy package for export
Plywood package or wooden fumigation package
Suitable for long distance transportation by sea
Warranty Period
Standard warranty: 12 months after commissioning, or 18 months after delivery, whichever comes first.
If you would like to extend the warranty period, please contact us for details.
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