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High-power High-efficient and Simplified High-frequency Switching Power Supply for Electrolytic Plating 被引量:6
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作者 MA Fujun LUO An XIAO Huagen 《中国电机工程学报》 EI CSCD 北大核心 2012年第21期I0001-I0022,共22页
针对大功率电解电镀开关电源的输入整流级引起的无功和谐波等电能质量问题,研究了一种基于高效PWM整流的高频开关电源。该电源前级整流器仅用4个开关管来进行PWM整流,后级采用半桥逆变器进行高频变换,显著减少了开关数量。针对三相四开... 针对大功率电解电镀开关电源的输入整流级引起的无功和谐波等电能质量问题,研究了一种基于高效PWM整流的高频开关电源。该电源前级整流器仅用4个开关管来进行PWM整流,后级采用半桥逆变器进行高频变换,显著减少了开关数量。针对三相四开关PWM整流器,推导一种基于开关模型的无差拍控制方法,该方法可实现系统的快速、无差整流。针对多台开关电源的并联均流问题,提出一种基于虚拟阻抗的自均流控制方法,可实现多台电源的均流稳定运行。通过仿真与实验验证了所提结构和控制方法的正确性。 展开更多
关键词 高频开关电源 电镀电源 电解 PWM整流器 高功率 半桥式逆变器 电能质量 HSPS
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On maximum power point tracking control strategy for variable speed constant frequency wind power generation 被引量:1
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作者 倪红军 《Journal of Chongqing University》 CAS 2010年第1期21-28,共8页
Based on the characteristic of AC-excited variable speed constant frequency(VSCF)wind power generation,the vector control technique was applied in a doubly fed induction generator(DFIG).Maximum wind energy or maximum ... Based on the characteristic of AC-excited variable speed constant frequency(VSCF)wind power generation,the vector control technique was applied in a doubly fed induction generator(DFIG).Maximum wind energy or maximum output power point can be tracked by decoupling control of active power and reactive power.The research result shows that the net power of generation system delivered to grid in maximum wind energy tracking mode is not the most.We presented a novel maximum power point tracking(MPPT)control strategy by analyzing the DFIG mathematic model and power relations which delivered the maximum power to the grid.The maximum power point could be tracked automatically without measuring wind speed in the control strategy and the control was independent of optimal turbine power curve,which had excellent dynamic and static performances and robustness.Simulation and experimental results testify the accuracy and validity of the control strategy. 展开更多
关键词 variable speed constant frequency grid voltage orientation DECOUPLING maximum power point tracking
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Variable Structure Model Reference Adaptive Control with Unknown High Frequency Gain Sign 被引量:2
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作者 DONG Wen-Han SUN Xiu-Xia LIN Yan 《自动化学报》 EI CSCD 北大核心 2007年第4期404-408,共5页
可变结构模型引用为有比一个和未知高频率获得符号大的相对的度的工厂的适应控制被建议。一个切换的计划基于为靠近的环系统的第一个辅助错误设计的监视功能被介绍。在至多切换和追踪的错误的一个有限数字收敛到能被适当地选择一些设计... 可变结构模型引用为有比一个和未知高频率获得符号大的相对的度的工厂的适应控制被建议。一个切换的计划基于为靠近的环系统的第一个辅助错误设计的监视功能被介绍。在至多切换和追踪的错误的一个有限数字收敛到能被适当地选择一些设计参数使任意地小的一个剩余集合以后,在监视函数的管理下面,切换停止,这被显示出在至多切换和追踪的错误的一个有限数字收敛到能被适当地选择一些设计参数使任意地小的一个剩余集合以后。 展开更多
关键词 混合控制 自适应系统 频率 放大信号
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Impact of switching frequencies on the TID response of SiC power MOSFETs 被引量:2
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作者 Sheng Yang Xiaowen Liang +9 位作者 Jiangwei Cui Qiwen Zheng Jing Sun Mohan Liu Dang Zhang Haonan Feng Xuefeng Yu Chuanfeng Xiang Yudong Li Qi Guo 《Journal of Semiconductors》 EI CAS CSCD 2021年第8期73-76,共4页
Different switching frequencies are required when SiC metal-oxide-semiconductor field-effect transistors(MOSFETs)are switching in a space environment.In this study,the total ionizing dose(TID)responses of SiC power MO... Different switching frequencies are required when SiC metal-oxide-semiconductor field-effect transistors(MOSFETs)are switching in a space environment.In this study,the total ionizing dose(TID)responses of SiC power MOSFETs are investigated under different switching frequencies from 1 kHz to 10 MHz.A significant shift was observed in the threshold voltage as the frequency increased,which resulted in premature failure of the drain-source breakdown voltage and drain-source leakage current.The degradation is attributed to the high activation and low recovery rates of traps at high frequencies.The results of this study suggest that a targeted TID irradiation test evaluation method can be developed according to the actual switching frequency of SiC power MOSFETs. 展开更多
关键词 SiC power MOSFET switching frequency oxide trap total ionizing dose TRANSISTOR semiconductor theory
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Circulating current suppression for ground tied variable frequency to constant frequency converter system in aircraft
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作者 Wei WEI Ming HUANG +2 位作者 Wenli YAO Weilin LI Xiaobin ZHANG 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2023年第11期386-397,共12页
This paper presents a solution to the circulating current fault of aircraft power supply.The DC-link type Variable Frequency to Constant Frequency(VFCF)converter system is the preferred scheme to feed the constant 400... This paper presents a solution to the circulating current fault of aircraft power supply.The DC-link type Variable Frequency to Constant Frequency(VFCF)converter system is the preferred scheme to feed the constant 400 Hz load in an aircraft with a variable frequency power supply.Due to the requirement of aircraft standards,both grounds of the rectification and inversion stage are tied to the metal frame of the aircraft.With such a tied ground,the DC bus voltage rises greatly,and a large circulating current appears in the casing as the ground,which leads to equipment failure and potential safety hazards.According to the existing methods of circulating current fault suppression,this paper analyzes the causes of the above faults and the harmonic components of circulating current and points out the limitations of the existing methods.Therefore,a Common-Mode(CM)choke-based method is proposed to provide a high impedance in the path of the CM circulating current.By doing so,the circulating current can be suppressed without the additional burden of the hardware and control algorithm,which is quite friendly for quality control of mass-production aircraft.Moreover,a simplified mathematic model of the VFCF converter system is derived to calculate the minimum inductance value reference of the CM choke,which saves the weight of passive devices to the greatest extent.Finally,simulation and experimental results are studied to verify the effectiveness of the proposed method. 展开更多
关键词 Aircraft power supply Circulating current Common mode choke power supply circuits variable Speed Constant frequency
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High Frequency Resonance in DFIG-Based Wind Farm with Variable Power Capacity 被引量:1
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作者 Yipeng Song Heng Nian Frede Blaabjerg 《Chinese Journal of Electrical Engineering》 CSCD 2017年第3期52-58,共7页
As wind power penetration has been gaining in the power grid for decades,a large number of the doubly fed induction generator(DFIG)based wind farms are being established around the globe.The power capacities of these ... As wind power penetration has been gaining in the power grid for decades,a large number of the doubly fed induction generator(DFIG)based wind farms are being established around the globe.The power capacities of these wind farms may vary around hundreds of MW,and most of the wind farms are connected to long transmission cables whose impedances can not be ignored and require careful attention.Several works have investigated the impedance interaction between the DFIG based wind farm and long transmission cables which may unfortunately cause high frequency resonance(HFR).The main contribution of this paper is to investigate the influence of the variable wind farm capacity on the behavior of the HFR when certain transmission cables are provided.It is found out that the potential HFR may happen in certain wind farms,and the larger wind farm capacity causes more severe HFR due to the relatively weaker grid transmission capability.Simulation results based on Matlab/Simulink are given to validate the analysis of HFR. 展开更多
关键词 DFIG based wind farm variable power capacity long transmission cable high frequency resonance
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Low-power variable frequency PFC converters
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作者 李娅妮 杨银堂 朱樟明 《Journal of Semiconductors》 EI CAS CSCD 北大核心 2010年第1期83-87,共5页
Based on the SinoMOS 1 μm 40 V CMOS process, a novel power factor corrention (PFC) converter with a low-power variable frequency function is presented. The circuit introduces a multi-vector error amplifier and a pr... Based on the SinoMOS 1 μm 40 V CMOS process, a novel power factor corrention (PFC) converter with a low-power variable frequency function is presented. The circuit introduces a multi-vector error amplifier and a programmable oscillator to achieve frequency modulation, which provides a rapid dynamic response and precise output voltage clamping with low power in the entire load. According to the external load variation, the system can modulate the circuit operating frequency linearly, thereby ensuring that the PFC converter can work in frequency conversionmode. Measured results show that the normal operating frequency of the PFC converter is 5-6 kHz, the start-up current is 36 μA, the stable operating current is only 2.43 mA, the efficiency is 97.3%, the power factor (PF) is 0.988, THD is 3.8%, the load adjust rate is 3%, and the linear adjust rate is less than 1%. Both theoretical and practical results reveal that the power consumption of the whole supply system is reduced efficiently, especially when the load varies. The active die area of the PFC converter chip is 1.61 ×1.52 mm^2. 展开更多
关键词 power factor correction pulse width modulation variable frequency multi-vector error amplifier programmable oscillator
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Application of GaN in Hard-switching Converters:Challenges and Potential Solutions
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作者 Bo LIU Zhe-yu ZHANG +1 位作者 Edward Jones Fei(Fred) WANG 《电力电子技术》 CSCD 北大核心 2017年第9期3-11,共9页
This paper overviews the benefits,challenges,research trends and potential solutions on the design and application of gallium nitride(GaN) technology in hard-switching power electronic converters from the device level... This paper overviews the benefits,challenges,research trends and potential solutions on the design and application of gallium nitride(GaN) technology in hard-switching power electronic converters from the device level up to converter level. 展开更多
关键词 氮化镓 功率 电子变换器 电子技术
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Constant Ripple Current Control for Switching DC-DC Converter
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作者 Gwo-Tarng Chern Jenn-Jong Shieh 《Journal of Energy and Power Engineering》 2012年第9期1437-1441,共5页
The adapted DC-DC converters should be smaller in size and have a small output current ripple to meet the increasing demand for low voltages with high performance and high density micro processors for several microele... The adapted DC-DC converters should be smaller in size and have a small output current ripple to meet the increasing demand for low voltages with high performance and high density micro processors for several microelectronic load applications. This paper proposes a DC-DC converter using variable on-time and variable switching frequency control enhanced constant ripple current control and reduced magnetic components. The proposed converter is realized by making the turn-offtime proportional to the on-time of the converter, according to the input and output voltage, thereby reducing the corresponding current ripple on output voltage in the continuous conduction mode. A Buck DC-DC converter using the proposed control strategy is analyzed in detail, along with some experimental results to show the performance and effectiveness of this converter. 展开更多
关键词 Constant ripple current DC-DC converter variable switching frequency continuous conduction mode indirect currentsensor magnetic component.
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基于频率切换实现恒流/恒压输出的电场耦合无线电能传输系统 被引量:1
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作者 苏玉刚 颜志琼 +3 位作者 胡宏晟 孙跃 刘哲 刘书柏杨 《中国电机工程学报》 EI CSCD 北大核心 2024年第4期1553-1564,I0025,共13页
电场耦合无线电能传输(electric-field coupled wireless power transfer,EC-WPT)技术的实际应用中,有些用电设备需要系统具有不同的恒定输出特性(恒流/恒压),即系统输出电压或输出电流与负载解耦,此外,系统还需具备在恒流、恒压模式间... 电场耦合无线电能传输(electric-field coupled wireless power transfer,EC-WPT)技术的实际应用中,有些用电设备需要系统具有不同的恒定输出特性(恒流/恒压),即系统输出电压或输出电流与负载解耦,此外,系统还需具备在恒流、恒压模式间按需切换的功能。针对该需求,基于LC-CLC谐振网络提出1种具有恒流/恒压输出特性的EC-WPT系统,分析LC-CLC谐振网络特性,推导恒流/恒压输出特性的实现条件以及恒流频率和恒压频率的计算方法,并给出系统参数设计方法,分析系统对工作频率的敏感性。最后通过仿真和实验验证所提出的EC-WPT系统恒流/恒压输出特性及其参数设计方法的正确性和有效性。实验结果表明所提出的系统在输入电压恒定的不同负载工况下分别实现2 A的恒流输出以及96 V的恒压输出,其最大传输效率分别为87.83%及88.17%。 展开更多
关键词 电场耦合无线电能传输系统 频率切换 恒流 恒压 谐振网络
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宽增益高效率CLLLC变换器的变频双移相调制策略 被引量:1
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作者 周国华 王淇 邓伦博 《电工技术学报》 EI CSCD 北大核心 2024年第8期2511-2522,共12页
在输入电压宽范围变化时,变频调制CLLLC变换器存在开关频率变化范围宽的问题,而移相调制CLLLC变换器难以实现宽范围零电压导通(ZVS)。为了实现宽输入电压CLLLC变换器的高效率,该文提出一种变频双移相调制方法。通过同时调节开关频率、... 在输入电压宽范围变化时,变频调制CLLLC变换器存在开关频率变化范围宽的问题,而移相调制CLLLC变换器难以实现宽范围零电压导通(ZVS)。为了实现宽输入电压CLLLC变换器的高效率,该文提出一种变频双移相调制方法。通过同时调节开关频率、一次侧全桥和二次侧全桥之间的移相角,拓宽CLLLC变换器的增益并提高其效率。采用时域分析法求解变频双移相调制CLLLC变换器的电压增益与谐振电感电流有效值,并分析频率以及移相角对电压增益和谐振电感电流有效值的影响。最后,通过搭建一台100~300 V输入、48 V/400 W输出的实验样机,验证了理论分析的正确性。 展开更多
关键词 变频双移相调制 宽输入电压 CLLLC变换器 时域分析 零电压导通
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一种低延时低功耗PWM比较器电路设计 被引量:1
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作者 张涛 邹百威 《微电子学与计算机》 2024年第3期112-117,共6页
设计了一种基于HHGrace 0.35μm BCD工艺的低延时低功耗电压型静态脉冲宽度调制(Pulse Width Modulation,PWM)比较器,主要应用于高频低功耗的开关电源系统。设计中包含动态尾电流源和改进型正反馈放大器,以改进传统跨导放大器(Operation... 设计了一种基于HHGrace 0.35μm BCD工艺的低延时低功耗电压型静态脉冲宽度调制(Pulse Width Modulation,PWM)比较器,主要应用于高频低功耗的开关电源系统。设计中包含动态尾电流源和改进型正反馈放大器,以改进传统跨导放大器(Operational Transconductance Amplifier,OTA)型比较器高延迟和高功耗等问题。仿真结果表明:在1.2~5.0 V供电电压范围内稳定工作,最大上升沿延时35 ns,最大下降沿延时41 ns,支持6 MHz开关频率的系统,比较精度8 mV,失调电压439μV,静态功耗仅为2.5μA(1.2 V供电)和4.4μA(5.0 V供电)。 展开更多
关键词 静态PWM比较器 高频 低功耗 开关电源
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基于变论域云PI的含风电负荷频率控制方法
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作者 李志军 丁子健 张家安 《控制工程》 CSCD 北大核心 2024年第1期54-60,共7页
随着风电渗透率不断提高,其不确定性严重影响了电力系统频率稳定。基于此问题,建立了含风电的互联电力系统负荷频率控制模型,其中风机通过附加下垂与虚拟惯性控制参与频率调节。在此基础上,为解决风电接入系统引起的频率波动问题,提出... 随着风电渗透率不断提高,其不确定性严重影响了电力系统频率稳定。基于此问题,建立了含风电的互联电力系统负荷频率控制模型,其中风机通过附加下垂与虚拟惯性控制参与频率调节。在此基础上,为解决风电接入系统引起的频率波动问题,提出变论域云PI负荷频率控制策略,对云模型输入和输出论域动态调整。为避免增加控制器的复杂程度,基于函数形式设计论域的伸缩因子。最后,仿真结果表明,所设计的控制器能进一步提高云PI控制器的自适应能力,更好地处理风电不确定性对系统频率的影响。 展开更多
关键词 风电 不确定性 负荷频率控制 变论域 云模型
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基于变频重构S/SP拓扑的无线电能传输系统恒流恒压研究
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作者 李中启 张晨曦 +2 位作者 王建斌 王忠美 黄守道 《电工技术学报》 EI CSCD 北大核心 2024年第15期4718-4732,共15页
针对电动汽车无线充电系统耦合系数和负载变化导致系统输出电流和电压剧烈波动的问题,提出一种由交错叠放式线圈结构和变频重构控制策略组成的无线电能传输系统,通过重构补偿拓扑,并切换工作频率,实现了系统的恒流恒压输出。首先,分析... 针对电动汽车无线充电系统耦合系数和负载变化导致系统输出电流和电压剧烈波动的问题,提出一种由交错叠放式线圈结构和变频重构控制策略组成的无线电能传输系统,通过重构补偿拓扑,并切换工作频率,实现了系统的恒流恒压输出。首先,分析了拓扑重构前后系统的恒流、恒压输出特性和零相角特性,对比恒流恒压工作模式下补偿电容的大小,给出了系统参数调整方法。其次,剖析了交错叠放式线圈结构模型,提出基于耦合系数波动最小原则的线圈结构优化策略。所提出的系统补偿元件较少,两个工作频率点符合国际标准。最后,搭建一套500 W的实验样机,验证系统的可行性和有效性。实验结果表明,交错叠放式线圈在X轴方向偏移发射线圈外径的55%(187mm)或Y轴方向偏移120mm时,耦合系数波动率小于5%。系统在恒流模式下电流波动率为3.58%,在恒压模式下电压波动率为4.83%,满足无线充电系统恒流恒压需求。 展开更多
关键词 无线电能传输 变频重构 恒流 恒压 零相角
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机载雷达开关电源新型防浪涌电路设计
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作者 封心歌 姜帆 刘玉云 《现代雷达》 CSCD 北大核心 2024年第7期100-107,共8页
针对机载雷达开关电源防浪涌电路在瞬态频繁开关机情况下失效率高的问题,研究了一种新型防浪涌电路。通过将栅源驱动电路和主功率充放电回路分离,分别对两个充放电时间常数独立设计,消除相关性,实现开关电源在瞬态频繁开关机状况下的有... 针对机载雷达开关电源防浪涌电路在瞬态频繁开关机情况下失效率高的问题,研究了一种新型防浪涌电路。通过将栅源驱动电路和主功率充放电回路分离,分别对两个充放电时间常数独立设计,消除相关性,实现开关电源在瞬态频繁开关机状况下的有效防冲击保护。文中对常规和新型两种防浪涌电路进行了对比分析,仿真和试验结果证明了新型防浪涌电路的有效性。该电路同时具备输入防反接功能,已广泛应用于机载雷达开关电源设计。 展开更多
关键词 机载雷达 开关电源 瞬态频繁 防浪涌 防反接
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State-of-the-art review on frequency response of wind power plants in power systems 被引量:38
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作者 Ziping WU Wenzhong GAO +4 位作者 Tianqi GAO Weihang YAN Huaguang ZHANG Shijie YAN Xiao WANG 《Journal of Modern Power Systems and Clean Energy》 SCIE EI 2018年第1期1-16,共16页
With an increasing penetration of wind power in the modern electrical grid, the increasing replacement of large conventional synchronous generators by wind power plants will potentially result in deteriorated frequenc... With an increasing penetration of wind power in the modern electrical grid, the increasing replacement of large conventional synchronous generators by wind power plants will potentially result in deteriorated frequency regulation performance due to the reduced system inertia and primary frequency response. A series of challenging issues arise from the aspects of power system planning,operation, control and protection. Therefore, it is valuable to develop variable speed wind turbines(VSWTs) equipped with frequency regulation capabilities that allow them to effectively participate in addressing severe frequency contingencies. This paper provides a comprehensive surveyon frequency regulation methods for VSWTs. It fully describes the concepts, principles and control strategies of prevailing frequency controls of VSWTs, including future development trends. It concludes with a performance comparison of frequency regulation by the four main types of wind power plants. 展开更多
关键词 WIND power plant INERTIAL response Primary frequency CONTROL Automatic generation control(AGC) variable speed WIND turbine(VSWT)
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定频变占空比控制的倍压型宽增益LLC谐振变换器
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作者 潘健 郭泓展 +2 位作者 宋豪杰 石迪 张恢鉴 《湖北工业大学学报》 2024年第2期82-86,共5页
传统LLC谐振变换器在宽电压范围应用时开关频率工作范围过宽,且电压调节性能较差。针对上述问题设计了一种定频变占空比的脉宽调制策略,该策略基于倍压结构的全桥LLC谐振变换器,通过改变原边侧开关网络工作在全桥和半桥的占空比,调节谐... 传统LLC谐振变换器在宽电压范围应用时开关频率工作范围过宽,且电压调节性能较差。针对上述问题设计了一种定频变占空比的脉宽调制策略,该策略基于倍压结构的全桥LLC谐振变换器,通过改变原边侧开关网络工作在全桥和半桥的占空比,调节谐振槽输入电压;同时,控制副边侧双向开关,可改变整流网络工作在全桥和倍压两种整流模式的占比,最终实现4倍电压增益的调节范围。与变频控制相比,该策略下变换器负载和励磁电感对增益的影响较小,可选用较大的励磁电感来减小循环电流。变换器原边侧开关管实现ZVS导通,整流二极管实现ZCS关断。最后,仿真与实验验证了该调制策略下变换器的可行性。 展开更多
关键词 变占空比 谐振变换器 定频控制 宽电压 软开关
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Fast valve power loss evaluation method for modular multi-level converter operating at high-frequency 被引量:5
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作者 Fen Tao Zhujun Xie +3 位作者 Jie Cheng Chenghao Li Lu Zhao Jinyu Wen 《Protection and Control of Modern Power Systems》 2016年第1期26-36,共11页
There is no common accepted way for calculating the valve power loss of modular multilevel converter(MMC).Valve power loss estimation based on analytical calculation is inaccurate to address the switching power loss a... There is no common accepted way for calculating the valve power loss of modular multilevel converter(MMC).Valve power loss estimation based on analytical calculation is inaccurate to address the switching power loss and valve power loss estimation based on detailed electro-magnetic simulation is of low speed.To solve this problem,a method of valve power loss estimation based on the detailed equivalent simulation model of MMC is proposed.Results of valve power loss analysis of 201-level 500MW MMC operating at 50Hz~1000Hz are presented.It is seen that the valve power loss of a MMC increased by 12,40 and 93%under 200Hz,500Hz and 1000Hz operating frequency.The article concludes that in a device with isolated inner AC system,MMC operating at higher frequency will be more competitive than typical 50Hz/60Hz MMC with moderate increase of operating power loss and significant reduction of the size of the AC components. 展开更多
关键词 Modular multilevel converter(MMC) Medium-high frequency Valve power loss Conduction power loss switching power loss
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基于自适应增强型复系数滤波器的多电飞机变频电网状态估计
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作者 胡欣 郭梦洁 +2 位作者 张震 马瑞卿 段晨东 《西北工业大学学报》 EI CAS CSCD 北大核心 2024年第3期460-466,共7页
多电飞机的电网是一种典型的孤岛微网,具有360~800 Hz的宽频率工作范围,传统恒定频率电网同步方法的动态性能在飞机变频电网中有所不足。为了准确估计飞机变频电网的电网状态,结合自适应模块,对增强型复系数滤波器锁相环进行改进,设计... 多电飞机的电网是一种典型的孤岛微网,具有360~800 Hz的宽频率工作范围,传统恒定频率电网同步方法的动态性能在飞机变频电网中有所不足。为了准确估计飞机变频电网的电网状态,结合自适应模块,对增强型复系数滤波器锁相环进行改进,设计了一种适应于MEA变频电网的自适应增强型复系数滤波器锁相环结构(AECCF-PLL)。分析了其传递函数与阶跃响应之间的关系,推导了模型参数与频率的关系,建立了频率自适应模块,满足飞机变频交流电网状态估计对稳定性和快速性的要求。实验结果表明,在飞机变频电网含有大小频率跳变、谐波、斜坡等扰动情况时,提出的AECCF-PLL可以实现对电网状态的快速稳定估计。 展开更多
关键词 变频电网 电网同步 频率自适应 锁相环
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中频真空电弧边缘击穿现象及仿真研究
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作者 蒋原 马速良 +2 位作者 武建文 李擎 朱立颖 《电工技术学报》 EI CSCD 北大核心 2024年第9期2887-2895,共9页
为深入掌握航空变频(360~800 Hz)电力系统中真空电器电弧特性,该文围绕中频灭弧室弧后发生的边缘击穿现象,以双温磁流体动力学仿真结合实验的研究方法,得到了以下结论:中频真空电弧离子数密度的最大值为2.6×10^(19)m^(-3),离子温... 为深入掌握航空变频(360~800 Hz)电力系统中真空电器电弧特性,该文围绕中频灭弧室弧后发生的边缘击穿现象,以双温磁流体动力学仿真结合实验的研究方法,得到了以下结论:中频真空电弧离子数密度的最大值为2.6×10^(19)m^(-3),离子温度的范围为0.30~0.91eV,电子温度的范围为1.50~2.43 eV;电子与离子之间存在能量交换,电子温度的变化会引起离子温度的变化;最高离子温度出现在阳极触头边缘处,与实验发现的边缘击穿位置重合,证明了此处确实存在能量集中;中频真空电弧是超声速流体,速度在边界处减慢,根据动能热能互换原理,中频真空电弧的质量流运动规律是边缘击穿的本质原因。 展开更多
关键词 航空变频电源 中频真空电弧 弧后击穿 边缘击穿 双温磁流体动力学模型
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