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论文:2016,Vol:34,Issue(6):1050-1056 |
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引用本文： |
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侯红胜, 刘卫国, 马瑞卿. 基于动态转矩的无刷直流电机机械特性和等效电压系数研究[J]. 西北工业大学学报 |
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Hou Hongsheng, Liu Weiguo, Ma Ruiqing. Mechanical Characteristics and Equivalent Voltage Coefficient Research of BLDC Motor Based on the Analysis of Dynamic Torque[J]. Northwestern polytechnical university |
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| 基于动态转矩的无刷直流电机机械特性和等效电压系数研究 |
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| 侯红胜, 刘卫国, 马瑞卿 |
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| 西北工业大学 自动化学院, 陕西 西安 710072 |
| 摘要: |
| 由于无刷直流电机换相过程会造成电枢电流和电磁转矩发生周期变化。在两相导通驱动方式下对电机动态转矩进行分析，并计算平均转矩得到转速——转矩机械特性为非线性，其输出转速小于理想值，从而使等效电压系数小于1。在换相过程中采用关断延迟重叠换相法能够提高电机输出转速，在理论上能够实现电机输出转速等于理想值，等效电压系数等于1。采用两相与三相交替导通的复合驱动方法能够实现输出转速大于理想值，等效电压系数大于1。仿真结果表明复合驱动能在不增加硬件的基础上，扩大了无刷直流电机的输出功率和调速范围。 |
| 关键词:
无刷直流电机
动态转矩
机械特性
等效电压系数
重叠换相
复合驱动
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| Mechanical Characteristics and Equivalent Voltage Coefficient Research of BLDC Motor Based on the Analysis of Dynamic Torque |
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| Hou Hongsheng, Liu Weiguo, Ma Ruiqing |
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| School of Automation, Northwestern Polytechnical University, Xi'an 710072, China |
| Abstract: |
| The phases current and torque will change all the time because of commutation in brushless DC motor. Dynamic torque is analyzed using two devices conducted drive mode. Average torque is calculated to obtain the speed-torque characteristics of BLDCM. It's is a non-linear curve, and the output speed is less than the ideal speed. So the equivalent voltage coefficient is less than one. Using overlapping commutation method can improve the output speed of motor, and it can reach the ideal speed in theory. Then the equivalent voltage coefficient equals one. Compound drive method with two devices and three devices conducted in turns can make the output speed of motor higher than the ideal value, then the equivalent voltage coefficient is larger than one. Simulation results show compound drive method can enlarge the speed change region, and improve the output power. |
| Key words:
brushless DC motor
dynamic torque
mechanical characteristics
equivalent voltage coefficient
overlapping commutation
compound drive
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| 收稿日期: 2016-04-12
修回日期:
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| DOI: |
| 基金项目: 陕西省微特电机及驱动技术重点实验室开放课题研究基金（2014SSJ1002）资助 |
| 通讯作者:
Email： |
| 作者简介: 侯红胜(1978-),西北工业大学讲师、博士研究生,主要从事稀土永磁电机及其控制技术研究。
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参考文献: |
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