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2015 International Conference on Technological Advancements in Power and Energy (TAP Energy)最新文献

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A novel topology of forward-flyback PFC converter with constant on-time control 一种具有恒准时控制的正反激PFC变换器的新型拓扑结构
M. V. Divya Prabha, P. Seema
A novel topology of forward-flyback power factor correction (PFC) converter with constant on-time control is proposed in this paper. The converter integrates the operation of a forward converter and a flyback converter. It operates either in the forward mode or the flyback mode depending on whether the input is higher or lower than the reflected output voltage to the transformer primary side. This integrated operation ensures that the dead zone problem of ac input current in conventional forward converters is overcome. It works for the universal ac input range and a high power factor is achieved. The proposed converter operates in critical conduction mode in order to achieve zero voltage switching and constant on-time control is applied. To confirm the validity of the proposed converter, simulations have been done using MATLAB/SIMULINK and are presented here.
提出了一种具有恒准时控制的正反激功率因数校正(PFC)变换器的新拓扑结构。该转换器集成了正激变换器和反激变换器的操作。它工作在正向模式或反激模式取决于输入是否高于或低于变压器初级侧的反射输出电压。这种集成操作确保克服了传统正激变换器中交流输入电流的死区问题。它适用于通用交流输入范围,实现了高功率因数。该变换器工作在临界导通模式以实现零电压开关,并采用恒导通控制。为了验证所提出的转换器的有效性,本文使用MATLAB/SIMULINK进行了仿真。
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引用次数: 2
Reduction of common mode voltage in three phase inverter 降低三相逆变器共模电压
Sibi Raj P M, M. Rashmi
Pulse Width Modulated (PWM) inverters produce common mode voltage. The common mode voltage will have adverse effect on the motor bearings. Hence the common mode voltage has to be reduced. This paper presents a modified Sinusoidal Pulse Width Modulation (SPWM) scheme in which two complementary modulating inputs are used to generate the pulses for the switches of a two level, three phase inverter to reduce the common mode voltage. The performance of proposed modulation scheme is evaluated and tested for various switching frequencies. With the proposed modulation scheme the phase voltages appears to be three level voltage which helps in reduction of common mode voltage. A comparative study of common mode voltage with both normal and modified SPWM method is also done and the results are presented in this paper.
脉宽调制(PWM)逆变器产生共模电压。共模电压会对电机轴承产生不利影响。因此,共模电压必须降低。本文提出了一种改进的正弦脉宽调制(SPWM)方案,该方案采用两个互补调制输入为二电平三相逆变器的开关产生脉冲,以降低共模电压。对所提出的调制方案在不同开关频率下的性能进行了评估和测试。采用所提出的调制方案,相位电压呈现为三电平电压,有助于降低共模电压。本文还对普通和改进SPWM方法的共模电压进行了比较研究,并给出了结果。
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引用次数: 11
Design optimization of 15 kW, 2-pole induction motor to achieve IE4 efficiency level with copper die-casting 设计优化15kw, 2极感应电机,达到IE4效率水平用铜压铸
D. Ashwin, M. Dixit, S. Ashok, Vinila Chavan
This paper describes the design and simulation of 15 kW, 2 pole, 50 Hz, three phase induction motor to achieve IE4 efficiency level as defined by the International Electrotechnical Commission (IEC). For achieving higher efficiency, the motor is designed, optimized and simulated with copper die-cast rotor and low loss electrical steel. The simulation method is first validated by comparing with the test results of standard IE3 motor. The same simulated model was taken as reference to design the IE4 motor. This design solution having IE4 efficiency is achieved without changing the stator geometry and frame size.
本文介绍了15kw, 2极,50hz,三相感应电动机的设计和仿真,以达到国际电工委员会(IEC)定义的IE4效率水平。为了实现更高的效率,电机采用铜压铸转子和低损耗电工钢进行设计、优化和仿真。首先通过与标准IE3电机的测试结果对比,验证了仿真方法的有效性。参考该仿真模型设计IE4电机。该设计方案在不改变定子几何形状和机架尺寸的情况下实现了IE4效率。
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引用次数: 15
Solar powered boost converter with passive snubber 带有被动缓冲器的太阳能升压转换器
P. Sruthi, D. Rajan, M. Pranav
This paper does the simulation of solar cell powered boost converter with resonant snubber. The converter system have a solar photo voltaic module and a closed loop boost converter. The low input from the solar PV module is converted to high level dc voltage by means of the closed loop boost converter. Converter have a 2D-2C-2L resonant snubber. This snubber ensures turn on at ZCS, and turn off at ZVS which will leads to considerable increase in performance. Converter has low complexity. The simulation of the converter for an input voltage of 12V is also presented.
本文对带有谐振缓冲器的太阳能电池供电升压变换器进行了仿真研究。该变换器系统具有太阳能光伏模块和闭环升压变换器。来自太阳能光伏组件的低输入通过闭环升压转换器转换为高电平直流电压。转换器有一个2D-2C-2L谐振缓冲器。这种缓冲器确保在ZCS时打开,在ZVS时关闭,这将导致性能的显著提高。转换器的复杂度低。文中还对输入电压为12V时的变换器进行了仿真。
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引用次数: 1
Bridgeless flyback converter for low power lighting application 用于低功率照明的无桥反激变换器
P. Saranya, L. R. Chandran
Lighting system management and optimization have turned into the most important research trend in lighting electronics. Solar LED lighting scheme is a major kind of light sources in the coming decades because of the efficiency concerns and renewable energy utilization. Conventional LED driving circuit is the combination of diode bridge rectifier and input PFC stage. Diode bridge rectifier at the front end of driving circuit will cause reduced conversion efficiency and power factor. This paper deals with reliable lighting scheme which can be supplied from both solar panel and conventional supply. A battery storage unit is also used to store the energy from PV panel and it also reduces the peak loading while it charging from conventional supply. The dc supply from grid connection is obtained by using bridgeless flyback converter which has inherent power factor correction capability. A MATLAB/Simulink model of proposed scheme is developed for validating the theoretical explanation and the relevant results are also discussed.
照明系统的管理与优化已成为照明电子学领域最重要的研究方向。太阳能LED照明方案是未来几十年的一种主要光源,因为效率问题和可再生能源的利用。传统的LED驱动电路是二极管桥式整流器和输入PFC级的组合。驱动电路前端采用二极管桥式整流器会导致转换效率和功率因数降低。本文讨论了太阳能板和常规供电两种可靠的照明方案。电池存储单元也用于存储来自光伏电池板的能量,并在从传统电源充电时降低峰值负荷。并网直流电源采用无桥反激变换器,具有固有的功率因数校正能力。建立了MATLAB/Simulink模型来验证理论解释,并对相关结果进行了讨论。
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引用次数: 0
Comparison between peak and average current mode control of improved bridgeless flyback rectifier with bidirectional switch 带双向开关的改进型无桥反激整流器峰值与平均电流模式控制比较
V. Ramya Chandranadhan, G. Renjini
This paper compares peak and average current mode control of flyback rectifier with bidirectional switch. The control schemes employs an outer voltage feedback loop, which maintains the output voltage as constant and an inner loop, which sense the input current. Average and peak current mode control of flyback rectifier is suitable for obtaining a regulated output voltage with a varying input. Voltage equivalent of input current is averaged by using high gain current error amplifier, which again compared with the reference voltage in the case of average current mode control. But in the case of peak current mode control, peak inductor current has been sensed and this gives rise to many serious problems, including poor noise immunity, a need for slope compensation, and peak-to-average current errors which the inherently low current loop gain cannot correct. Reference voltage is produced by multiplying the rectified input voltage with the error output voltage. These control methods obtain better line and load regulation with the addition of inner current loop compared with voltage mode control. Also the rectified input voltage feedback achieves better input power factor. Conventional flyback rectifier is the inter connection of a diode bridge rectifier in the input side and a flyback converter. In order to obtain a highly efficient flyback rectifier with fewer losses an improved flyback rectifier is introduced. Improved bridgeless flyback rectifier only introduces a switch with common gate drive, a diode and an additional winding in the secondary side. Thus the weight of the converter is not affected with these additional components. Proposed peak and average current mode control can be used as an adapter. Design details of average current mode control also discussed and simulation and hardware results are presented.
本文比较了采用双向开关的反激整流器的峰值电流模式和平均电流模式控制。该控制方案采用外部电压反馈环和内环,前者保持输出电压恒定,后者检测输入电流。反激整流器的平均和峰值电流模式控制适用于在变化输入条件下获得稳压输出电压。采用高增益电流误差放大器对输入电流的电压当量进行平均,再与平均电流模式控制下的参考电压进行比较。但在峰值电流模式控制的情况下,感应到峰值电感电流,这会产生许多严重的问题,包括抗噪性差,需要斜率补偿,以及固有的低电流环路增益无法纠正的峰值-平均电流误差。参考电压由整流输入电压乘以误差输出电压产生。这些控制方法与电压模式控制相比,增加了电流内环,获得了更好的线路和负载调节。整流输入电压反馈也能获得更好的输入功率因数。传统的反激整流器是由输入端的二极管桥式整流器和反激变换器互连而成。为了获得效率高、损耗少的反激整流器,提出了一种改进型反激整流器。改进的无桥反激整流器只引入了一个带有共同栅极驱动的开关,一个二极管和在二次侧的附加绕组。因此,转换器的重量不受这些附加组件的影响。建议的峰值和平均电流模式控制可以用作适配器。讨论了平均电流模式控制的设计细节,给出了仿真和硬件结果。
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引用次数: 2
Two-port DC-DC converter with flyback inverter for rural lighting applications 带反激逆变器的双端口DC-DC转换器,用于农村照明应用
Parvathi Nair, K. Deepa
A two port DC-DC converter, combined with a modified flyback inverter, is presented in this paper. The output of the inverter is 230V sinusoidal voltage at 50Hz used for supplying rural lighting applications. Combination (solar and battery) of the energy sources along with a voltage doubler forms the two input port of the DC-DC converter for solar-battery hybrid systems. To obtain a low frequency output voltage for the load modified flyback inverter structure is utilized. A control algorithm implemented to supply the load using PV and battery sources either independently or simultaneously for maintaining the constant output voltage is also presented. This work focuses on simulation studies of the same to verify the converter working using PSIM software.
本文提出了一种双端口DC-DC变换器,并结合了一种改进的反激逆变器。逆变器的输出是230V的正弦电压,50Hz,用于供应农村照明应用。太阳能-电池混合系统的DC-DC转换器的两个输入端口是能源(太阳能和电池)的组合以及电压倍增器。为了获得负载的低频输出电压,采用了改进的反激逆变器结构。本文还提出了一种控制算法,实现了光伏电源和蓄电池电源分别供电或同时供电,以保持输出电压恒定。本文重点对该变换器进行了仿真研究,利用PSIM软件验证了变换器的有效性。
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引用次数: 9
Boost Derived Hybrid Converter implementation using fuzzy controller 利用模糊控制器实现升压派生混合变换器
Saketh Dogga, V. Surendar, P. Ponnambalam, M. P. Kumar
The hybrid converter topology presented in this article is called Boost Derived Hybrid Converter (BDHC), it can supply dc and ac loads simultaneously from a single dc input. This topology is realized by replacing the single control switch of a boost converter with an H-bridge inverter. The presented hybrid converter requires lesser number of switches. DC and AC outputs have high reliability, due to its essential shoot-through operation. Better power density and reliability can be well suited for Nano grids in residential applications. A suitable pulse width modulation (PWM) control strategy is devised for BDHC is described in this paper. The implementation of a fuzzy logic controller using output voltage as feedback for significantly improving the performance of BDHC is proposed in this article. The simulation results shows that dc and ac output voltages can be controlled independently in steady state condition of BDHC.
本文提出的混合变换器拓扑结构称为升压衍生混合变换器(BDHC),它可以从单个直流输入同时提供直流和交流负载。这种拓扑结构是用h桥逆变器代替升压变换器的单个控制开关来实现的。所提出的混合变换器需要较少数量的开关。直流和交流输出具有很高的可靠性,因为它具有必不可少的通射操作。更好的功率密度和可靠性可以很好地适用于住宅应用的纳米电网。本文介绍了一种适合BDHC的脉宽调制(PWM)控制策略。本文提出了一种以输出电压为反馈的模糊逻辑控制器的实现,以显著提高BDHC的性能。仿真结果表明,在BDHC稳态状态下,直流和交流输出电压可以独立控制。
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引用次数: 5
A two stage hybrid algorithm for estimation of non-stationary sinusoidal signal parameter 非平稳正弦信号参数估计的两阶段混合算法
Saakshi Awasthi, S. Nanda
In this paper we consider the problem of estimation of amplitude, phase and frequency of a time-varying sinusoidal signal corrupted by noise. The frequency is estimated using Linear Predictor Approach and amplitude, phase is estimated using ADALINE approach. It is a two stage algorithm, estimated frequency of first stage is used to estimate amplitude and phase in second stage. Moreover, the learning parameter is tuned iteratively for faster convergence. From the proposed method a numerically robust and low complexity algorithm is derived for tracking the parameters of real sinusoid. Simulation results illustrate the good performance of the proposed method.
本文研究了被噪声破坏的时变正弦信号的幅值、相位和频率估计问题。频率估计采用线性预测方法,幅度和相位估计采用ADALINE方法。该算法采用两级算法,利用第一级的估计频率来估计第二级的幅值和相位。此外,迭代调整学习参数以加快收敛速度。基于该方法,推导出一种数值鲁棒、低复杂度的实数正弦波参数跟踪算法。仿真结果表明了该方法的良好性能。
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引用次数: 1
Constant switching frequency hysteresis controller for VSI fed Induction Motor drive using current error space phasor approach 基于电流误差空间相量法的恒开关频率磁滞控制
Joseph Peter, R. Ramchand
A simple current error space vector (CESV)based constant switching frequency hysteresis controller for two level voltage source inverter fed Induction Motor(IM) drives is proposed in this paper. The main advantages of space phasor based hysteresis controllers such as fast dynamic response, adjacent voltage vector switching can be seen in the proposed controller. In addition to these, switching frequency variation can be eliminated substantially. The stator voltages estimated from the current ripple, calculation of vector switching times and voltage error vectors are used for the current error boundary calculation. The proposed controller selects only those inverter voltage vectors of the present sector which are adjacent to the machine voltage vectors for the entire range of operation to reduce current error. Bus clamping space vector pulse width modulation(BCSVPWM) is used for vector selection logic where only one zero state is used in a sub cycle of total switching time period. The proposed hysteresis controller based inverter fed drive scheme is simulated using SIMULINK toolbox of MATLAB for steady state and transient performance.
提出了一种简单的基于电流误差空间矢量(CESV)的恒开关频率滞回控制方法,用于两电平电压源逆变式异步电动机驱动。基于空间相量的迟滞控制器具有动态响应快、相邻电压矢量切换等优点。除此之外,开关频率的变化可以基本上消除。根据电流纹波估计定子电压,计算矢量开关次数和电压误差矢量,计算电流误差边界。该控制器在整个工作范围内只选择当前扇区中与机器电压矢量相邻的逆变器电压矢量,以减小电流误差。总线箝位空间矢量脉宽调制(BCSVPWM)用于矢量选择逻辑,其中在总开关时间周期的子周期中只使用一个零状态。利用MATLAB的SIMULINK工具箱对所提出的基于磁滞控制器的逆变器馈动方案进行了稳态和暂态性能仿真。
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引用次数: 2
期刊
2015 International Conference on Technological Advancements in Power and Energy (TAP Energy)
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