三相400Hz逆变电源的研究

发布时间：2018-05-16 15:30

本文选题：400Hz + 逆变电源　；参考：《西安科技大学》2017年硕士论文

【摘要】：随着现代化设备的广泛应用,电源产品作为其重要组成部分也在不断更新,一些特殊用途的逆变电源应运而生。中频逆变电源因在船舶、通信、雷达、航空等领域的广泛使用而备受人们的关注。数字控制技术可以完成大量的控制运算,从而实现智能化控制。本文就是对400Hz逆变电源的数字控制技术进行研究与设计。本文根据逆变电源的基本原理,结合课题技术指标,对主电路进行设计,包括单相不可控整流电路、DC-DC全桥变换电路、DC-AC三相全桥逆变电路以及滤波电路。建立了三相静止ABC坐标系变换到两相同步旋转dq坐标系下的逆变器数学模型,在对称分量法的基础上,引入延迟对消算子对输出电压进行正、负序分离,采用改进的双环PI控制调节分离后的电压正、负序分量,选择SVPWM算法控制功率开关器件的通断,并在Simulink仿真环境下进行仿真。结果表明,该控制方法可实现带不平衡负载运行以及电压的稳定输出。最后选用TI公司的DSP芯片TMS320F28335作为主控芯片设计了中频逆变器的控制系统,包括选取QP12W05S-37芯片设计逆变器的驱动电路、采用UC3875芯片设计全桥变换器的控制电路、以及设计辅助电源电路、采样电路等硬件电路,并在CCS6.0.0集成开发环境下进行软件编写。本文基于电路的软硬件设计搭建实验平台,对所设计的5kVA三相400Hz逆变电源进行实验分析,进一步验证了设计的合理性。
[Abstract]:With the wide application of modern equipment, power supply products as an important part of it are constantly updated, and some special purposes of inverter power have emerged. If inverter is widely used in ship, communication, radar, aviation and so on. Digital control technology can complete a large number of control operations, so as to achieve intelligent control. This paper studies and designs the digital control technology of 400Hz inverter power supply. According to the basic principle of inverter power supply and the technical index of the subject, this paper designs the main circuit, including single-phase uncontrollable rectifier circuit, DC-DC full-bridge converter circuit, DC-AC three-phase full-bridge inverter circuit and filter circuit. A mathematical model of inverter in three-phase stationary ABC coordinate system to two-phase synchronous rotation DQ coordinate system is established. On the basis of symmetrical component method, delay cancellation operator is introduced to separate the output voltage in positive and negative sequence. An improved double loop Pi control is used to adjust the positive and negative sequence components of the separated voltage. The SVPWM algorithm is selected to control the on-off of the power switch device, and the simulation is carried out in the Simulink simulation environment. The results show that the control method can realize the operation with unbalanced load and the stable output of voltage. Finally, the control system of intermediate frequency inverter is designed by using TI's DSP chip TMS320F28335 as the main control chip, including the QP12W05S-37 chip to design the drive circuit of the inverter, and the UC3875 chip to design the control circuit of the full-bridge converter. And design auxiliary power supply circuit, sampling circuit and other hardware circuits, and in the CCS6.0.0 integrated development environment for software programming. Based on the hardware and software design of the circuit, the experiment platform is built in this paper, and the experimental analysis of the 5kVA three-phase 400Hz inverter power supply is carried out, which further verifies the rationality of the design.
【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM464

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