双三相永磁同步电机驱动控制技术研究
发布时间：2018-07-16 15:19
【摘要】：在功率等级、调速性能和可靠性要求苛刻场合，传统三相异步电机无法满足实际需求。而多相永磁同步电机因其具有高功率密度、转矩脉动小、可靠性高等优点，具有广阔的发展空间。本文以双三相永磁同步电机为研究对象，分析双三相永磁同步电机的多维空间矢量调制技术、矢量控制和直接转矩控制技术，然后研究了一种新的单逆变器驱动多台电机的电路拓扑结构。 首先，建立双三相永磁同步电机的矢量空间解耦数学模型。传统SVPWM技术只控制α-β平面的参考电压矢量，忽视了x-y平面的参考电压矢量，导致x-y平面产生较大的电流谐波，增加电机铜耗，影响电机控制性能。本文基于多维空间矢量调制的思想，研究了最大四矢量SVPWM技术和最大两矢量与次大两矢量SVPWM技术，可以同时严格控制α-β平面和x-y平面的参考电压矢量。仿真结果表明，这两种SVPWM控制算法不仅能够提高直流母线电压利用率，而且还能消除x-y平面的5、7次谐波，使输出电压呈纯正弦变化。 然后，研究了双三相永磁同步电机多电机串联驱动控制技术。将两台双三相永磁同步电机定子绕组通过合理的相序转换规则串联在一起，用一台六相电压源型逆变器进行驱动控制。为了实现两台电机独立运行，本文采用一种具有双调制器的SVPWM控制策略，在单逆变器供电下，输出相电压仅包含两台串联电机各自所需的电压基波分量，，实现两台串联电机的解耦控制。仿真结果表明：改变串联系统中任意一台电机的转速或负载，对另一台电机的运行并无影响，理论分析与仿真结果一致，验证了方案的正确性和可行性。
[Abstract]:The traditional three-phase asynchronous motor can not meet the actual demand in the situation of demanding power grade, speed regulation performance and reliability. Multiphase permanent magnet synchronous motor (PMSM) has wide development space because of its advantages of high power density, low torque ripple and high reliability. In this paper, the multi-dimensional space vector modulation technology, vector control and direct torque control technology of dual-three-phase permanent magnet synchronous motor are analyzed. Then a new circuit topology of single inverter driving multiple motors is studied. Firstly, the vector space decoupling mathematical model of dual three-phase permanent magnet synchronous motor is established. The traditional SVPWM technique only controls the reference voltage vector of 伪-尾 plane, but neglects the reference voltage vector of x-y plane, which results in large current harmonics in the x-y plane, increases the copper consumption of the motor and affects the control performance of the motor. Based on the idea of multidimensional space vector modulation, the maximum four-vector SVPWM technique and the maximum two-vector and sub-large two-vector SVPWM technique are studied in this paper. The reference voltage vectors of the 伪-尾 plane and the x-y plane can be strictly controlled at the same time. The simulation results show that the two SVPWM control algorithms can not only improve the utilization ratio of DC bus voltage, but also eliminate the 57th harmonic of x-y plane, and make the output voltage change with pure sine. Then, the control technology of double-three-phase permanent magnet synchronous motor (PMSM) is studied. The stator windings of two dual-three-phase permanent magnet synchronous motor (PMSM) are connected in series by a reasonable phase-sequence conversion rule, and a six-phase voltage source inverter is used to drive and control the stator windings. In order to realize the independent operation of two motors, an SVPWM control strategy with double modulators is adopted in this paper. Under the power supply of single inverter, the output phase voltage contains only the fundamental components of the voltage required by each of the two series motors. The decoupling control of two series motors is realized. The simulation results show that changing the speed or load of any motor in the series system has no effect on the operation of the other motor. The theoretical analysis is consistent with the simulation results, and the correctness and feasibility of the scheme are verified.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM341
本文编号：2126801
[Abstract]:The traditional three-phase asynchronous motor can not meet the actual demand in the situation of demanding power grade, speed regulation performance and reliability. Multiphase permanent magnet synchronous motor (PMSM) has wide development space because of its advantages of high power density, low torque ripple and high reliability. In this paper, the multi-dimensional space vector modulation technology, vector control and direct torque control technology of dual-three-phase permanent magnet synchronous motor are analyzed. Then a new circuit topology of single inverter driving multiple motors is studied. Firstly, the vector space decoupling mathematical model of dual three-phase permanent magnet synchronous motor is established. The traditional SVPWM technique only controls the reference voltage vector of 伪-尾 plane, but neglects the reference voltage vector of x-y plane, which results in large current harmonics in the x-y plane, increases the copper consumption of the motor and affects the control performance of the motor. Based on the idea of multidimensional space vector modulation, the maximum four-vector SVPWM technique and the maximum two-vector and sub-large two-vector SVPWM technique are studied in this paper. The reference voltage vectors of the 伪-尾 plane and the x-y plane can be strictly controlled at the same time. The simulation results show that the two SVPWM control algorithms can not only improve the utilization ratio of DC bus voltage, but also eliminate the 57th harmonic of x-y plane, and make the output voltage change with pure sine. Then, the control technology of double-three-phase permanent magnet synchronous motor (PMSM) is studied. The stator windings of two dual-three-phase permanent magnet synchronous motor (PMSM) are connected in series by a reasonable phase-sequence conversion rule, and a six-phase voltage source inverter is used to drive and control the stator windings. In order to realize the independent operation of two motors, an SVPWM control strategy with double modulators is adopted in this paper. Under the power supply of single inverter, the output phase voltage contains only the fundamental components of the voltage required by each of the two series motors. The decoupling control of two series motors is realized. The simulation results show that changing the speed or load of any motor in the series system has no effect on the operation of the other motor. The theoretical analysis is consistent with the simulation results, and the correctness and feasibility of the scheme are verified.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM341
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