Electrical Interference and Restraining Measures of Frequency Inverter 变频器的电气干扰及抑制措施
It is verified that the dynamic response and interference rejection ability of the inverter can effectively be improved by the voltage and current double closed-loop controlling method. 仿真结果证明电压电流双闭环控制方法可有效地改善逆变器的动态响应及抗扰能力。
The interferences of distributed control system include noise sources interference emerged by the unqualified environment, electromagnetic induction interference come from outward and multi-frequency harmonics interference come from inverter. 分布式控制系统的干扰包括安装环境不符合要求产生的噪声源干扰、外部电磁感应干扰及变频器等设备高次谐波对系统造成的干扰。
At low frequency ( 9kHz~ 30MHz), it exits serious mutual interference between electric controlling units and disturbance source of low frequency such as inverter and motor. 在低频段(9kHz~30MHz),其主要部件如逆变器和电动机等低频骚扰源与车辆的电子控制单元有严重的相互干扰。
Based on the suggested adaptive inverse control interference eliminator design, the controller may be much better to improve the gimbal servo control system performance than conventional interference inverter. 设计的自适应逆扰动消除器大大改善了框架伺服系统的控制性能、提高了系统的速率输出精度。
This paper discusses the mechanism of DC metro train failure, holds that some improvement measures, such as interference prevention, the change of the designed protection value, an increase in the number of inverter and DC/ DC booster, shall be taken. 对该故障,可通过防止干扰引起的误触发、改变保护动作设定值、增设逆变器起动专用DC/DC升压变换器等措施予以解决。
After the HF self-adaptive interference inverter has been adopted, the RX/ TX frequency space can be greatly reduced and the duplex communication has been realized as well as the frequency resource has been fully utilized. The communication quality has been greatly improved. 采用短波自适应干扰抵消器后能缩小收发频率间隔,实现双工通信,使频率资源得到充分利用,能提高通信质量,连接简单。
The proposed electronic ballast is the cascade operation of electro magnetic interference ( EMI) filter, AC/ DC rectifier, PFC, half-bridge inverter and dimmable control circuit. 文中提出的这种电子镇流器由电磁干扰(EMI)滤波器、交流/直流整流器、功率因数校正电路(PFC)、半桥逆变谐振电路和可调光控制电路级联而成。
Damping and suppression of common mode interference currents in PWM inverter PWM逆变器共模干扰电流的衰减和抑制
With soft-switching technology, inverter spot-welding power source has lower switching dissipation, lower electromagnetic interference and lower sensitivity to parasitic parameters of power circuit, contribute to inverter output characteristics and circuit efficiency, stability and reliability. 采用软开关技术的点焊逆变电源,可减小开关损耗、电磁干扰及对电路寄生参数的敏感性,并从根本上改善电路的输出特性,提高电路的效率、稳定性和可靠性。
The inverter would generate output of frequency vibration as the external signals interference in the automatic control according to the analog signal. This would cause the vibration of the pump and have a significant impact on the lives of the inverter and pump. 变频器在根据模拟信号进行自动控制时往往会由于外界信号干扰产生输出频率的振动,造成给水泵转速的振动,这对于变频器和给水泵的寿命有严重影响。
Multilevel inverter has low output voltage harmonic content, low electromagnetic interference, and small output filter, can help PV grid-connected system to improve efficiency and reduce the volume. This kind of inverter has a wide range of applications in the field of photovoltaic power generation. 多电平逆变器具有输出电压谐波含量低、电磁干扰小、输出滤波器体积小等优点,有助于光伏并网系统提高效率,减小体积,在光伏发电领域中具有广泛的应用前景。
Great advancements have been made in the area of the arc-welding inverter power source in recent years. However, there are still some problems, and one of them is the harmonic interference of the arc-welding inverter power source. The harmonic interference includes two sides. 近年来逆变式弧焊电源有了很大的进展和长足的进步,但也存在着不少问题,其中之一就是逆变式弧焊电源的谐波干扰问题。
From the perspective of EMI, this greatly increased the common-mode interference which aroused from charging and discharging parasitic capacitance from the traction inverter and the motor to the ground ( namely common-mode EMI). 从电磁干扰的角度看,这大大增加了通过牵引逆变器和电机对地的寄生电容进行充放电而产生的共模干扰。
The CMOS inverters are normally chosen in digital circuit devices and it is the foundation of CMOS digital circuit analysis and design. So, the study of microwave interference effects on CMOS digital circuit-level device are mostly concentrated in CMOS inverter. 在CMOS数字电路器件中,最典型的基本单元门电路为反相器,它是CMOS数字电路分析设计的基础,因此CMOS数字器件电路级微波扰乱效应研究大多集中在CMOS反相器。