Description: 交流发电机电压自动控制器,用于控制交流发电机因外加负载的改变自动稳压之用.-Alternator automatic voltage controller, is used to control alternator load changes due to additional use of automatic voltage regulator. Platform: |
Size: 2048 |
Author:吕清宇 |
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Description: 基于FPGA的自治型SPWM波形发生器的设计！正弦脉宽调制（SPWM）技术在以电压源逆变电路为核心的电力电子装置中有着广泛的应用，如何产生SPWM脉冲序列及其实现手段是PWM技术的关键。大家共同探讨哈！-FPGA based SPWM autonomy-based waveform generator design! Sinusoidal pulse width modulation (SPWM) technology in the voltage source inverter circuit as the core of the power electronic devices have a wide range of applications, how to generate SPWM pulse sequence and its implementation means PWM technology is the key. Kazakhstan investigate everyone! Platform: |
Size: 4096 |
Author:小喻 |
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Description: PWM控制就是产生一定周期，占空比不同的方波信号，当占空比较大时，电机转速较高，否则电机转速较低。当采用FPGA产生PWM波形时，只需FPGA内部资源就可以实现，数字比较器的一端接设定值输出，另一端接线性递增计数器输出。当线性计数器的计数值小于设定值时输出低电平，当计数器大于设定值时输出高电平，这样就可通过改变设定值，产生占空比不同的方波信号，从而达到控制直流电机转速的目的。
直流电机控制电路主要由2部分组成，如图1所示：
FPGA中PWM脉宽调制信号产生电路；
FPGA中正/反转方向控制电路
-PWM control is a certain cycle, a different duty cycle square wave signal, when the duty cycle is high, higher motor speed, or lower motor speed. When the PWM waveform generated using FPGA, the FPGA internal resources only can be achieved, the figure one comparator output termination setting, the other linear incremental counter output termination. When the value of linear counter output is less than low-level settings, when the counter output is greater than high settings, so that by changing the settings can produce different duty cycle square wave signal, DC motor control to achieve the purpose of speed.
DC motor control circuit mainly by 2 parts, as shown in Figure 1:
FPGA in the PWM pulse width modulation signal generator circuit
Chiang Kai-shek FPGA/reverse direction control circuit Platform: |
Size: 37888 |
Author:袁玉佳 |
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Description: 本文件是一个SPWM逆变器的仿真源文件，可以在MATLAB7.1中直接运行。设计中PWM Generator采用外部调制信号，并在调制信号中注入了三次谐波，很好的抑制了输出谐波，同时提高了直流电源的利用率。-This document is a SPWM inverter simulation source file, you can directly run MATLAB7.1. Design of PWM Generator external modulation signal, and in the modulation signal into the third harmonic, the output of good harmonic suppression, while improving the utilization of the DC power supply. Platform: |
Size: 67584 |
Author:李勇 |
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Description: 采用AVR单片机编写的正弦信号、方波信号、三角波信号发生器。使用PWM调制方式进行调制后再解调通过RC滤波器滤出信号。-AVR prepared using single-chip sinusoidal signal, square-wave signal, triangular wave signal generator. The use of PWM modulation modulation through the RC filter after the demodulation filter out the signal. Platform: |
Size: 34816 |
Author:刘建文 |
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Description: PWM原理
2、调制器设计思想
3、具体实现设计
一、 PWM（脉冲宽度调制Pulse Width Modulation）原理：
脉冲宽度调制波通常由一列占空比不同的矩形脉冲构成，其占空比与信号的瞬时采样值成比例。图1所示为脉冲宽度调制系统的原理框图和波形图。该系统有一个比较器和一个周期为Ts的锯齿波发生器组成。语音信号如果大于锯齿波信号，比较器输出正常数A，否则输出0。因此，从图1中可以看出，比较器输出一列下降沿调制的脉冲宽度调制波。
-PWM principle
2, modulator design ideas
3, concrete realization of the design
1, PWM (Pulse Width Modulation Pulse Width Modulation) principle:
Pulse-width modulation wave is usually a rectangular pulse duty cycle of different composition, its duty cycle and the signal is proportional to the instantaneous sampling value. Figure 1 shows the pulse-width modulation system block diagram and waveform diagram. The system has a comparator and a cycle composed of Ts of the sawtooth generator. If the voice signal is greater than sawtooth signal, the comparator output of the normal number of A, otherwise output 0. Thus, as can be seen from Figure 1, the comparator output a falling edge pulse width modulation wave modulation.... Platform: |
Size: 61440 |
Author:weiwen |
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Description: 整个系统以CPLD为核心逻辑控制器件，配以外围测试及试验电路：显示、时钟信号产生电路、蜂鸣器电路和ByteBlaster的数据变换电路，构成正负脉宽数控调制信号发生器。基于CPLD逻辑控制器件构成的正负脉宽数控调制信号发生器是一个单片系统,整个PWM信号控制所需的各种功能都可由CPLD来实现。-The entire system to the core logic control CPLD devices, together with the external test and the test circuit: display, clock signal generation circuit, buzzer circuit and ByteBlaster data converter, NC constitute positive and negative pulse width modulated signal generator. CPLD logic control device based on the positive and negative pulse width modulation signal generator is a numerical control system on chip, the PWM signals control the various functions required by the CPLD can be achieved. Platform: |
Size: 250880 |
Author:唐慧 |
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Description: On the Causes of Circulating Currents in PWM
Drives With Open-End Winding AC Machines
Phase-Shifting-Transformer-Fed Multimodular
Matrix Converter Operated by a
New Modulation Strategy
An All-DC Offshore Wind Farm With
Series-Connected Turbines: An Alternative to the
Classical Parallel AC Model?
Reactive Power Control of Permanent-Magnet
Synchronous Wind Generator With Matrix Converter Platform: |
Size: 7259136 |
Author:sina |
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Description: The generating systems use Doubly-Fed Induction Generators (DFIGs) to achieve high
conversion efficiency and to reduce the installation cost. This paper presents a modeling and Maximum
Power Point Tracking (MPPT) control method of DFIG-based variable-speed wind energy conversion
system. The generator considered is a wound rotor induction machine whose stator is connected directly
to the grid and the rotor is fed through back-to-back Pulse-Width Modulation (PWM) converters. Stator
flux-oriented vector control is applied to control the active and reactive current loops independently. The
MPPT control method in a Wind Energy Conversion System (WECS) is proposed. The proposed control
solution aims at driving the position of the operating point near to optimality. This is a very important
aspect to maintain DFIGs efficiently in a variable wind speed. The wind generator is modeled in RSCAD
program which is interfaced with the Real Time Digital Simulator (RTDS). Platform: |
Size: 678912 |
Author:menaouer |
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Description: —a Space Vector Pulse Width Modulation Method
(SVPWM) is an advanced intense computational modulation
method with several advantages such as less harmonic content
relative to other PWM modulations, effective utilization of dc
bus, and complete digital implementation by a single chip
microprocessor. Due to the advantages SVM has increasing
applications in power converters and motor control. 2-level
inverter is the first model developed using this technique. In this
paper, we implement SVPWM technique for 2-level inverters in
the simplest way possible and optimized memory usage by
processor using programmable pulse generator.
Platform: |
Size: 61440 |
Author:golalipour |
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Description: —a Space Vector Pulse Width Modulation Method
(SVPWM) is an advanced intense computational modulation
method with several advantages such as less harmonic content
relative to other PWM modulations, effective utilization of dc
bus, and complete digital implementation by a single chip
microprocessor. Due to the advantages SVM has increasing
applications in power converters and motor control. 2-level
inverter is the first model developed using this technique. In this
paper, we implement SVPWM technique for 2-level inverters in
the simplest way possible and optimized memory usage by
processor using programmable pulse generator.
Platform: |
Size: 12288 |
Author:golalipour |
Hits:
Description: —a Space Vector Pulse Width Modulation Method
(SVPWM) is an advanced intense computational modulation
method with several advantages such as less harmonic content
relative to other PWM modulations, effective utilization of dc
bus, and complete digital implementation by a single chip
microprocessor. Due to the advantages SVM has increasing
applications in power converters and motor control. 2-level
inverter is the first model developed using this technique. In this
paper, we implement SVPWM technique for 2-level inverters in
the simplest way possible and optimized memory usage by
processor using programmable pulse generator.
Platform: |
Size: 13312 |
Author:golalipour |
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Description: 用VHDL实现占空比任意可调的PWM产生器。（程序逐行注释），有仿真图。PWM,即Pulse-Width Modulation 脉宽调制，常用于电机的控制中。-Using VHDL adjustable duty cycle of PWM generator. (Progressive program notes), a simulation map. PWM, i.e. Pulse-Width Modulation PWM, used to control the motor. Platform: |
Size: 178176 |
Author:豆传航 |
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Description: 使用msp430单片机实现脉宽调制，脉宽调制即为PWM，在如今的工业中使用十分的频繁，作为一款较新的单片机，这个程序还是很有用的，程序为自己亲手编制，也可以使用ccs中的功能模块直接生成程序，但对于初学者而言，自己编写的程序更有助于学习编程~-Msp430 MCU using pulse width modulation, pulse width modulation is the PWM, for use in today' s industry is very frequent, as a relatively new microcontroller, this program is very useful, procedures for the preparation of their own hands, or you can use ccs The function generator module directly, but for starters, I have written a program more conducive to learning programming ~ Platform: |
Size: 188416 |
Author:cuicui |
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Description: This Paper consists on the study of one part of wind energy system conversion, its AC side.
Renewable resources are in constant fluctuation. This situation could put in peril the energizing efficiency towards a given demand requirement.
Therefore, in order to maximize the efficiency of the renewable energy system, it is necessary to track the maximum power point of the input source, a study established under MATLAB/Simulink platform. For the wind system, the maximizing is assured while considering the optimal power curve as load characteristic, with the knowledge of the turbine characteristic Cp (λ).
Then, this work elaborates the analysis and simulation of a low speed Permanent Magnet Synchronous Generator (PMSG) driven by a vertical wind turbine through a Pulse-Width Modulation (PWM) voltage inverter, independently of the DC components of the wind system conversion, using MATLAB computer simulation. -This Paper consists on the study of one part of wind energy system conversion, its AC side.
Renewable resources are in constant fluctuation. This situation could put in peril the energizing efficiency towards a given demand requirement.
Therefore, in order to maximize the efficiency of the renewable energy system, it is necessary to track the maximum power point of the input source, a study established under MATLAB/Simulink platform. For the wind system, the maximizing is assured while considering the optimal power curve as load characteristic, with the knowledge of the turbine characteristic Cp (λ).
Then, this work elaborates the analysis and simulation of a low speed Permanent Magnet Synchronous Generator (PMSG) driven by a vertical wind turbine through a Pulse-Width Modulation (PWM) voltage inverter, independently of the DC components of the wind system conversion, using MATLAB computer simulation.
Platform: |
Size: 192512 |
Author:zakary |
Hits:
Description: 用于产生占空比任意可调的PWM产生器。PWM,即Pulse-Width Modulation 脉宽调制，常用于电机的控制中。(It is used to generate any adjustable PWM generator. PWM, namely Pulse-Width Modulation pulse width modulation, is commonly used in motor control.) Platform: |
Size: 172032 |
Author:jqhnfin |
Hits:
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