Optimization analysis of propulsion motor control efficiency
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摘要:
目的 为了加强对推进电机的控制效果,在实际控制过程中减少能量的损耗, 方法 在传统的推进电机等值电路上,增加铁损电流分量,通过定义引入功率匹配比,寻找电机在给定转速下最高的运行效率,并探讨此功率匹配比对应的磁通;在原有的电机矢量控制中加入效率优化控制模块,以起到电机效率优化、船舶运行节能的效果。 结果 MATLAB/Simulink仿真测试结果显示,加入效率优化控制模块的方法基本适用于各种工况,改进后的电机模型的运行效率明显高于传统电机模型,并且动态性能良好。 结论 工程上可以借鉴该电机效率优化控制方法,以达到节能的效果。 Abstract:Objectives This paper aims to strengthen the control effect of propulsion motors and decrease the energy used during actual control procedures. Methods Based on the traditional propulsion motor equivalence circuit, we increase the iron loss current component, introduce the definition of power matching ratio, calculate the highest efficiency of a motor at a given speed and discuss the flux corresponding to the power matching ratio with the highest efficiency. In the original motor vector efficiency optimization control module, an efficiency optimization control module is added so as to achieve motor efficiency optimization and energy conservation. Results MATLAB/Simulink simulation data shows that the efficiency optimization control method is suitable for most conditions. The operation efficiency of the improved motor model is significantly higher than that of the original motor model, and its dynamic performance is good. Conclusions Our motor efficiency optimization control method can be applied in engineering to achieve energy conservation. -
Key words:
- propulsion motor /
- power matching ratio /
- efficiency optimization /
- energy conservation
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表 1 不同转速对应的功率匹配比
Table 1. Power matching ratio under different speed
n/(r·min-1) λ 50 0.791 7 100 0.817 5 150 0.846 9 200 0.878 4 250 0.911 2 300 0.944 8 350 0.978 9 400 1.013 4 450 1.047 4 500 1.082 5 550 1.117 1 600 1.151 5 650 1.185 8 700 1.219 8 750 1.253 7 800 1.291 7 850 1.326 3 900 1.361 2 950 1.395 5 1 000 1.429 7 表 2 电机参数
Table 2. The parameters of the motor
参数 数值 额定功率Pe/kW 180 额定转速ne/(r·min-1) 1 000 额定线电压(Y型)Ue/V 690 额定线电流(Y型)Ie/A 198 转动惯量J/(kg·m2) 7.3 等效磁化电抗Xm/Ω 4.220 7 等效定子漏电抗Xs/Ω 0.175 6 等效转子漏电抗Xr/Ω 0.381 3 等效定子电阻Rs/Ω 0.038 4 等效转子电阻Rr/Ω 0.030 3 阻尼常数d 0.001 极数p 6(3对) 同步频率fe/Hz 50 电抗基频fb/Hz 50 表 3 传统矢量控制下推进电机运行效率
Table 3. Propulsion motor running efficiency under traditional vector control
T/(N·m) 效率η/% 100 r/min 300 r/min 500 r/min 700 r/min 740 r/min 200 8.70 15.51 19.88 26.25 27.37 400 15.28 27.46 35.52 41.11 43.87 600 19.88 36.32 47.35 55.21 56.63 800 22.96 42.42 55.42 65.04 65.74 1 000 25.01 46.56 60.95 71.82 72.53 1 200 26.34 49.46 65.15 76.63 77.12 1 400 27.21 51.51 67.64 80.02 80.65 1 600 27.75 52.99 69.74 82.55 84.87 1 800 28.09 54.08 71.35 84.04 85.63 2 000 28.31 54.91 72.61 85.18 87.66 2 200 28.38 55.57 73.63 86.07 87.33 表 4 效率优化控制下推进电机运行效率
Table 4. Propulsion motor running efficiency under efficiency optimization control
T/(N·m) 效率η/% 100 r/min 300 r/min 500 r/min 700 r/min 740 r/min 200 17.16 29.13 41.72 48.42 49.57 400 20.85 38.05 49.96 58.21 59.51 600 22.91 42.09 55.45 64.41 66.03 800 24.67 45.23 59.73 69.29 71.18 1 000 25.28 47.93 63.21 73.42 75.44 1 200 26.37 49.92 66.22 77.02 79.09 1 400 27.72 51.77 68.86 80.09 82.23 1 600 29.09 53.46 71.13 83.03 84.87 1 800 29.79 55.08 73.37 85.37 86.37 2 000 31.39 56.41 75.41 86.95 87.17 2 200 31.92 57.71 77.24 86.92 87.92 -
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