Study on Design and Vibration Reduction Optimization of High Starting Torque Induction Motor
Abstract
:1. Introduction
2. Prototype Parameters and Magnetic Field Calculation
2.1. Prototype Parameters
2.2. Calculation of the Magnetic Field and Starting Performance
3. Calculation and Analysis of Electromagnetic Vibration
3.1. Time-Domain Characteristics of Electromagnetic Force Waves
3.2. Time-Domain Calculation and Analysis of Electromagnetic Vibration
3.3. Comparison of Calculation and Experiment of Electromagnetic Vibration
4. The Optimal Design for the Stator Winding of Vibration Reduction
4.1. Winding Optimization Scheme
4.2. Electromagnetic Vibration Before and After Winding Optimization
5. Conclusions
- The starting torque of the improved motor has been significantly increased, and the air gap flux density waveform was effectively improved, that is, the amplitude of the fundamental wave increased, and the fifth- and seventh-order harmonics were effectively weakened.
- By analyzing the radial vibration displacement of the prototype in the time domain and frequency domain, it can be observed that the simulation results are consistent with the experimental results, which confirms the reliability of the calculation method proposed in this paper. Because the influence of mechanical vibration and other factors were not considered in the simulation process, the simulation result was slightly smaller than the experimental value.
- In this paper, the optimal design scheme for vibration reduction windings was proposed. The adopted stator winding design of 2YD (equal turns) can ensure that the starting performance of the motor is not significantly affected, meanwhile, the motor has better magnetic field characteristics and operation performance.
- After winding optimization, the amplitude and fluctuation of the electromagnetic force of the motor were evidently reduced, and the corresponding vibration displacement of the motor was evidently reduced, especially in the Y direction, which means the object of optimization design was reached. In addition, the radial vibration displacement was larger than the axial vibration displacement.
- This paper designs a high-start torque induction motor for oil field operations, which meets the requirements of high starting torque and low load operation. At the same time, the vibration reduction optimization method proposed in this paper can provide a reference for the vibration reduction design of other types of induction motors.
Author Contributions
Funding
Conflicts of Interest
References
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Parameter | Value | Parameter | Value |
---|---|---|---|
Rated power (kW) | 22 | Rated voltage (V) | 380 |
Power frequency (Hz) | 50 | Rated speed (rpm) | 980 |
Stator outer diameter (mm) | 327 | Stator inner diameter (mm) | 230 |
Number of stator slots | 54 | Number of rotor slots | 44 |
Air gap length (mm) | 0.5 | Core height (mm) | 245 |
Starting Performance | Starting Torque-Simulation Value /Nm | Starting Torque-Design Value/Nm | Starting Current Ratio Calculated Value |
---|---|---|---|
Motor before improvement | 510 | 530 | 6.34 |
Motor after improvement | 923 | 914 | 7.973 |
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Xie, Y.; Pi, C.; Li, Z. Study on Design and Vibration Reduction Optimization of High Starting Torque Induction Motor. Energies 2019, 12, 1263. https://doi.org/10.3390/en12071263
Xie Y, Pi C, Li Z. Study on Design and Vibration Reduction Optimization of High Starting Torque Induction Motor. Energies. 2019; 12(7):1263. https://doi.org/10.3390/en12071263
Chicago/Turabian StyleXie, Ying, Cheng Pi, and Zhiwei Li. 2019. "Study on Design and Vibration Reduction Optimization of High Starting Torque Induction Motor" Energies 12, no. 7: 1263. https://doi.org/10.3390/en12071263