单相永磁无刷直流电机控制系统的研究

发布时间：2018-02-07 11:46

本文关键词： 单相永磁无刷直流电机前馈补偿矢量控制单相SVPWM调制稳定性分析　出处：《浙江大学》2017年硕士论文　论文类型：学位论文

【摘要】：单相永磁无刷直流电机(简称Single-phase PMBLDCM)凭借着其结构简单、低成本等显著优点,已经在很多领域得到了非常广泛应用。但是,人们对其良好的性能也提出了越来越高的要求。这不仅仅体现在电机本体结构需要进一步优化,对单相永磁无刷直流电机的低转矩脉动、高效率运行方面的研究也是未来的发展趋势。为了解决单相永磁无刷直流电机的"起动死点"问题,常将电机设计成不均匀气隙结构,但是较大的齿槽转矩对电机的输出转矩波动产生很大影响。为了使单相永磁无刷直流电机的输出转矩得到改善,本文在查阅国内外大量相关书籍文献的基础上,分别采用能量法和麦克斯韦应力张量法对单相无刷直流电机的齿槽转矩进行了分析,进而提出了基于前馈自适应的转矩补偿控制方法,通过对交轴电流分量进行前馈补偿,所产生的电磁转矩与齿槽转矩相互补偿,以降低电机输出转矩脉动。为了实现单相永磁无刷直流电机的高效率控制,本文对其高效率控制的关键点进行了分析,并且参考三相永磁无刷直流电机中广泛应用的空间矢量控制技术,提出了一种适用于单相永磁无刷直流电机的矢量控制技术,该方法通过构造与真实相电流正交的虚拟相电流,构成两相正交静止坐标系统,经Park旋转坐标变换以及双电流闭环调节,再使用单相SVPWM调制技术输出,实现对单相永磁无刷直流电机的矢量控制。此外,还提出了一种基于内功率因数角闭环调节的简单正弦波电流控制方法。最后,通过搭建实验平台进行具体实验验证分析,单相永磁无刷直流电机的矢量控制方法和改进的简单的正弦波电流控制方法均能实现了其在宽负载范围的高效率运行,且电流波形正弦度良好,电机在振动噪声方面也得到了明显改善。但是,从电机但总体控制性能来看,矢量控制的方法比改进的简单正弦波控制还更胜一筹。
[Abstract]:Single phase permanent magnet brushless DC motor (Single-phase PMBLDCM) has been widely used in many fields because of its simple structure and low cost. It is not only that the structure of the motor needs to be further optimized, but also the low torque ripple of the single-phase permanent magnet brushless DC motor. In order to solve the problem of "starting dead point" of single-phase permanent magnet brushless DC motor, the motor is often designed as a non-uniform air-gap structure, in order to solve the problem of "starting dead point" of single-phase permanent magnet brushless DC motor. In order to improve the output torque of single-phase permanent magnet brushless DC motor, based on a large number of domestic and foreign literature, The tooth groove torque of single-phase brushless DC motor is analyzed by energy method and Maxwell stress Zhang Liang method, and a feedforward adaptive torque compensation control method is proposed. In order to reduce the output torque ripple of the motor, the key points of the high efficiency control of single-phase permanent magnet brushless DC motor are analyzed in this paper, in order to achieve the high efficiency control of the single-phase permanent magnet brushless DC motor. Referring to the space vector control technology widely used in the three-phase permanent magnet brushless DC motor, a vector control technique for single-phase permanent magnet brushless DC motor is proposed. The virtual phase current, which is orthogonal to the real phase current, is constructed. A two-phase quadrature static coordinate system is constructed. The vector control of single-phase permanent magnet brushless DC motor is realized by means of Park rotation coordinate transformation and double current closed-loop regulation, and then the single-phase SVPWM modulation technique is used to output the system. A simple sinusoidal current control method based on closed loop regulation of internal power factor angle is also proposed. The vector control method of single-phase permanent magnet brushless DC motor and the improved sinusoidal current control method can achieve high efficiency in wide load range, and the sinusoidal degree of current waveform is good. But the vector control method is better than the improved simple sinusoidal control method.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM33;TP273

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