摘要
在传统的电子束焊机电源系统中,由于开关电源自身的原因,存在较高的固有高纹波输出电压特点,导致电子束焊机电源系统的输出电压不稳定。为此,采用耦合电感技术,设计了一种Zeta型变换器为主电路的电子束焊机的电源系统,其原理是将耦合电感技术与Zeta型变换器相结合,合理分配Zeta变换器中的两耦合电感的耦合程度来抑制纹波。同时,采用PI控制-前馈控制构成的复合控制器提高电源系统的控制精度和输出稳定精度。PLECS软件仿真结果表明,该系统不仅抑制输出电压纹波效果十分明显,而且还具备输出电压稳压精度高、动态特性好和工作可靠等特点,验证了理论推导的正确性。
The traditional power supply system of electron beam welder(EBW)has the characteristic of high intrinsic ripple in the output voltage due to the properties of switching power supply,which may lead to the unstable output voltage of EBW′s power system.Therefore,the coupling inductor technology is used to design a new EBW′s power system taking Zeta-type converter as the main circuit.The combination of coupling inductor technology and Zeta-type converter can reasonably allocate the coupling degree of two coupling inductors in Zeta-type converter to suppress the ripple of output voltage.The compound controller composed of PI control and feedforward control is used to improve the control accuracy and output stability accuracy of the power system.The simulation results of PLECS software show that the designed system can obviously suppress the ripple of output voltage,and has the characteristics of high output voltage regulating accuracy,perfect dynamic property and reliable operation,which can verify the correctness of the theoretical derivation.
作者
莫金海
林伟
陶辉
MO Jinhai;LIN Wei;TAO Hui(School of Mechanical and Electrical Engineering,Guilin University of Electronic Technology,Guilin 541004,China)
出处
《现代电子技术》
北大核心
2019年第5期115-118,123,共5页
Modern Electronics Technique
基金
广西自然科学基金资助项目(2015GXNSFAA139291)~~
关键词
电子束焊机
耦合电感
Zeta型变换器
纹波抑制
复合控制
高压稳定电源
electron beam welder
coupling inductor
Zeta-type converter
ripple rejection
compound control
high.voltage stabilized power supply
