Description: 中频感应加热以其加热效率高、速度快，可控性好及易于实现机械化、自动化等优点，已在熔炼、铸造、弯管、热锻、焊接和表面热处理等行业得到广泛的应用。
本设计根据设计任务进行了方案设计，设计了相应的硬件电路，研制了20KW中频感应加热电源。
本设计中感应加热电源采用IGBT作为开关器件，可工作在10 Hz～10 kHz频段。它由整流器、滤波器、和逆变器组成。整流器采用不可控三相全桥式整流电路。滤波器采用两个电解电容和一个电感组成Ⅱ型滤波器滤波和无源功率因数校正。逆变器主要由PWM控制器SG3525A控制四个IGBT的开通和关断，实现DC-AC的转换。
设计中采用的芯片主要是PWM控制器SG3525A和光耦合驱动电路HCPL-316J。设计过程中程充分利用了SG3525A的控制性能，具有宽的可调工作频率，死区时间可调，具有输入欠电压锁定功能和双路输出电流。由于HCPL-316J具有快的开关速度（500ns），光隔离，故障状态反馈，可配置自动复位、自动关闭等功能，所以选择其作为IGBT的驱动。
对原理样机的调试结果表明，所完成的设计实现了设计任务规定的基本功能。此外，为了满足不同器件对功率需要的要求，设计了功率可调。这部分超出了设计任务书规定的任务。-induction heating with high heating efficiency, speed and good controllability and easy to mechanization. the advantages of automation, in melting, casting, bending, forging, welding and surface heat treatment and other industries have been widely employed. According to the design tasks for the design of the program design, design corresponding to the hardware circuit, Development of 20 KW induction heating power. The design of induction heating power IGBT used as a switching device, which can work in 10 Hz- 10 kHz frequency band. It consists of rectifier, filter, and the inverter components. Controlled Rectifier not use the entire three-phase bridge rectifier circuit. 2 filter used an electrolytic capacitor and inductor components II-type filter and passive PFC. Inverter mainly by the PW Platform: |
Size: 5120 |
Author:wq57 |
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Description: 三相电压型PWM整流器
空间矢量控制研究和仿真分析-Three-phase voltage type PWM rectifier with space vector control research and simulation analysis Platform: |
Size: 206848 |
Author:matlabman |
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Description: 本文以双Pwm变换器为基础，分析论述了电力电子装置的整流、逆变和回馈状态的国内外发展状况。随着科学技术的发展，电力电子装置的低功率因数和高谐波污染已经成为电网的两大主要危害，因此提高系统功率因数便是电力电子技术的发展趋势，本文阐述了功率因数的定义，脉宽调制的种类以及电压
型PWM变换器的原理、控制方法等内容，比较了脉宽调制的各种类型，详细推导了三相电压型PWM变换器的数学建模，指出系统各种控制方法的优缺点，着重表达了二相调制脉宽空间矢量WPM的算法推导，选用了系统主控芯片，编写了系统软件程序，设计了交一直一交的主电路结构，针对控制系统的要求，论
文对影响系统性能的几个主要参数进行了理论分析、推导和数值计算。
本文用Matalb仿真软件，对整个控制系统的动态性能进行了仿真与分析，验证了系统理论的正确性和可应用性，对样机的研制提供了强有力的指导作用。
论文最后，讨论了样机实验。通过一系列的实验，记录、分析样机在各种状态下的波形和数据，得出结论，做出展望，为课题的进一步研究打下了一定的基础。
-In this paper, double-Pwm converter, based on analysis of power electronic devices discussed rectifier, inverter and feedback status of domestic and foreign developments. With scientific and technological development, low-power electronic devices, power factor and high harmonic pollution has become the network s two main hazards, thus improving system power factor is the development trend of power electronics technology, this paper, the definition of power factor, pulse-width modulation types as well as voltage
-Type PWM converter principle, control methods, content, comparison of various types of pulse-width modulation, detailed derivation of the three-phase voltage-type PWM converter mathematical modeling, pointing out that the system s advantages and disadvantages of various control methods, focusing on expression of two-phase space vector pulse width modulation algorithm derived WPM, choose the system master chip, the preparation of the system software program designed to pay a d Platform: |
Size: 3617792 |
Author:狼狼 |
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Description: Methods for limitation and elimination of disturbances and harmonic pollution in the power system have been widely investigated. This problem rapidly intensifies with the increasing amount of electronic equipment (computers, radio set, printers, TV sets etc.). This equipment, a nonlinear load, is a source of current harmonics, which produce increase of reactive power and power losses in transmission lines. The harmonics also cause electromagnetic interference and, sometimes, dangerous
resonances. They have negative influence on the control and automatic equipment, protection systems, and other electrical loads, resulting in reduced reliability and availability. Moreover, nonlinear loads and non-sinusoidal currents produce non-sinusoidal voltage drops across the network impedanceis, so that non-sinusoidal voltages appears at several points of the mains. It brings out overheating of line,transformers and generators due to the iron losses. - Methods for limitation and elimination of disturbances and harmonic pollution in the power system have been widely investigated. This problem rapidly intensifies with the increasing amount of electronic equipment (computers, radio set, printers, TV sets etc.). This equipment, a nonlinear load, is a source of current harmonics, which produce increase of reactive power and power losses in transmission lines. The harmonics also cause electromagnetic interference and, sometimes, dangerous
resonances. They have negative influence on the control and automatic equipment, protection systems, and other electrical loads, resulting in reduced reliability and availability. Moreover, nonlinear loads and non-sinusoidal currents produce non-sinusoidal voltage drops across the network impedanceis, so that non-sinusoidal voltages appears at several points of the mains. It brings out overheating of line,transformers and generators due to the iron losses. Platform: |
Size: 2214912 |
Author:lakhdar |
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Description: current closed loop pwm rectifier which work in open loop for traction systems.matlab simulink modal is aasigned with it. Platform: |
Size: 15360 |
Author:kripansh |
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Description: pwm rectifier which work in open loop for traction systems.matlab simulink modal is aasigned with it. Platform: |
Size: 10240 |
Author:kripansh |
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Description: Dq frame pwm rectifier which work in open loop for traction systems.matlab simulink modal is aasigned with it. Platform: |
Size: 11264 |
Author:kripansh |
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Description: voltage and current control loop pwm rectifier which work in open loop for traction systems.matlab simulink modal is aasigned with it. Platform: |
Size: 11264 |
Author:kripansh |
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Description: mathmatical average model of pwm rectifier with dq controllerpwm rectifier which work in open loop for traction systems.matlab simulink modal is aasigned with it. Platform: |
Size: 10240 |
Author:kripansh |
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Description: PWM发生器模型，给做逆变整流电路的一点方便，全部都是用模块搭建的-PWM generator model, to make the point easy inverter rectifier circuit, all built with the modules Platform: |
Size: 8192 |
Author:佘禄平 |
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Description: 在电网电压频率波动或者三相不平衡的情况下,硬件锁相很难准确检测到基波正序的相位。在结合PWM整流器空间矢量解耦控制算法的基础上,将软件锁相环技术应用在PWM整流器控制系统中,并用仿真和实验验证了该方案的可行性。实验结果表明,该方案解决了电网电压频率波动及三相不平衡时的相位同步等问题,并在工程上具有一定参考价值。-Frequency or voltage fluctuations in three-phase unbalanced case, the hardware lock is difficult to accurately detect the fundamental positive sequence phase. In the space vector PWM rectifier with decoupling control algorithm based on the software used in the PWM rectifier PLL control system, and use simulation and experimental verification of the feasibility. Experimental results show that the solutions to address the voltage and frequency fluctuations of the phase unbalanced three-phase synchronization issues, and the project has a certain reference value. Platform: |
Size: 121856 |
Author:ren |
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Description: 1、基于Ip/Iq方法控制PWM整流器，实现有功无功解耦控制，实现直流电容的稳压控制。
2、分别采用滞环电流和电压空间矢量技术进行PWM调制
3、DSTATCOM无功补偿仿真验证
4、系统采用了在带有前馈解耦控制的基础上产生的电压电流双闭环控制结构，其中电压外环保证了稳定的直流输出，电流内环提高了电流的动态响应速度，并且这种控制方法使电流的相位和输入电压的相位保持一致。-1, based on Ip/Iq way to control the PWM rectifier to achieve the active and reactive decoupling control of DC capacitor voltage control. 2, respectively, using hysteresis current and voltage space vector PWM modulation technique 3, DSTATCOM reactive power compensation simulation 4, the system used in the decoupling control with feed-forward on the basis of the voltage and current double closed-loop control structure, in which voltage outer ring to ensure a stable DC output, current inner improve current dynamic response, and this control method makes the current phase and the phase of the input voltage is consistent. Platform: |
Size: 59392 |
Author:有梦最美 |
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Description: its an rectifier circuit with PWM PI control technique for high accuracy and better output with very low THD. Platform: |
Size: 10240 |
Author:jay |
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Description: 提出了一种基于 d-q 轴解耦和中点电位控制的高性能三电平中点钳位 PWM 整
流器控制方法。该方法具有电流控制精度高，能够实现有功电流和无功电流的无差调节的优点，
并且通过设计中点电位控制器，能够有效抑制由外部扰动和调制方 法造成的中点电位的直流和低
频脉动。-In this paper, the mathematical model of three-level neutral-point-clamped （ NPC）
voltage source rectifier（ VSR） using switching functions is founded firstly, and its operating principle
is analyzed. Then a high performance control method with d-q axis decoupling and neutral point
voltage control for the PWM rectifier is presented. Platform: |
Size: 1024 |
Author:黄杰 |
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Description: tree phase pmw rectifier whith pfc powersim simulation run in psim demos and plot result of this rectifier Platform: |
Size: 10240 |
Author:bvnb |
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Description: 提出了一种无电流传感器的三相 PWM 整流器控制策略。系统采用双闭环控制，外环
PI 调节器控制直流侧输出电压，内环通过滞环调节器控制有功功率和无功功率，达到单位功率因
数运行的目的。根据整流器的数学模型通过电流重构可获得网侧电流，以实现无电流传感器控制。
仿真实验证明该方案具有良好的控制性能。-In this paper a current sensorless control strategy of three-phase PWM rectifiers is
presented. Double close-loop control method is applied in the system. DC voltage is regulated by the
external loop PI regulator. The system can operate at unity power factor by controlling the active and
reactive power with two inner loop hysteresis controllers. The input AC current can be reconstructed
the mathematical model of PWM rectifiers in order to eliminating current sensors . The simulation
results prove that the system has good performance. Platform: |
Size: 199680 |
Author:liuyue |
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