无电解电容逆变器驱动下的永磁同步电机的应用研究

发布时间：2018-03-14 00:48

本文选题：电机视在功率　切入点：逆变器输入功率跟踪法　出处：《南京航空航天大学》2015年硕士论文　论文类型：学位论文

【摘要】：电解电容具有单位体积容值大、价格低廉等优点,被广泛应用于空调的电机驱动控制器上。但它的使用周期受到温度、电流纹波以及工作频率的影响,从而限制了整机的使用寿命,降低了电路的可靠性。因此,研究一种无电解电容的电机驱动控制器方案就具有特别重要的意义。本文首先阐述了永磁同步电机的基本原理、数学模型和典型的控制策略;分析了传统的电机驱动电路和带PFC的电机驱动电路的原理和特点,并在对多个电机驱动新型电路拓补研究的基础上,研究并分析了一种能够实现自然PFC功能的新型无电解电容的电机驱动电路拓扑;提出了永磁同步电机视在功率的计算方法,给出了逆变器输入电流跟踪法和逆变器输入功率跟踪法两种控制策略,通过对比分析,选择了逆变器输入功率跟踪法进行了仿真,验证了该控制策略的可行性;针对采用逆变器输入功率跟踪法后,其功率因数不够高和算法计算量比较大的问题,提出一种简化的新型控制方案;基于Freescale的MC56F8335的DSP芯片建立了硬件平台,结合具有电压前馈的电流环、基于滑模观测器的无位置传感器技术进行了实验验证,实验结果验证了本文方案的可行性。
[Abstract]:The electrolytic capacitor with capacitance values per unit volume, the price is low, the motor is widely used in the air conditioner driving controller. But its use cycle is affected by temperature, and the influence of the current ripple frequency, which limits the service life of the machine, reduce the reliability of the circuit. Therefore, it is particularly important to research an electrolytic capacitor motor drive controller. This paper describes the basic principle of permanent magnet synchronous motor, mathematical model and typical control strategy; analysis of electric machine driving circuit principle and characteristics of the traditional motor drive circuit and PFC, and on the basis of a motor drive circuit topology model research on the research and analysis of a motor model can realize natural PFC function without electrolytic capacitor drive circuit topology; the permanent magnet synchronous motor in power calculation method, Given the input current of inverter inverter input power tracking method and tracking method two kinds of control strategy, through comparative analysis, choose the inverter input power tracking method is simulated to verify the feasibility of the control strategy for the inverter; the input power tracking method, the power factor is not high enough and the calculation is relatively large, the new control scheme proposed a simplified; the establishment of the hardware platform of DSP chip Freescale based on MC56F8335, combined with the current loop with voltage feedforward, sensorless technique based on sliding mode observer is verified by experiments, the experimental results verify the feasibility of the scheme.

【学位授予单位】：南京航空航天大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM464;TM341

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