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Description: 本系统基于反馈控制思想，由交直流转换电路、DC-DC变换器、步进电路模块和显示模块4个模块电路构成开关稳压电源。交直流转换电路整流部分采用全波桥式整流电路形式，DC-DC变换器以TL494有主核心设计并加上简单滤波电路及RC放电回路所构成的回路控制器。它能把脉冲宽度变化的信号转换成与脉冲宽度成正比变化的直流信号，进而实现闭环单回路控制。由单片机控制
数字定位器X9241的电阻,进而控制输出电压。显示模块由LCD1602构成。
-Based on feedback control of the system of thought, from AC-DC converter circuit, DC-DC converters, stepper circuit module and display module 4 module circuit switching power supply. AC-DC converter circuit using full-wave rectifier part of the circuit form of bridge rectifier, DC-DC converter to TL494 have the main core of the design and add a simple RC filter circuit and discharge circuit posed by the loop controller. It can change the pulse width signals into changes with the pulse width is proportional to the DC signal, and thus realize the closed-loop single-loop control. By the single-chip microcomputer to control the number of locator X9241 resistance, thereby control the output voltage. LCD1602 constituted by the display module.
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Size: 50176 |
Author: 苏永生 |
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Description: eighteen pulse converter with vecot contro of induction motot drive
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Size: 17408 |
Author: haleem |
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Description: circuits, design of three phase 12 pulse converter. it is very useful for improving the power factor.-circuits, design of three phase 12 pulse converter. it is very useful for improving the power factor.
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Size: 590848 |
Author: Murali |
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Description: Pulse for Matrix Converter
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Size: 10240 |
Author: vuu |
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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.
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Size: 250880 |
Author: 唐慧 |
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Description: five level zero voltage switching active clamping pulse width modulation for dc to dc buck converter
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Size: 10240 |
Author: sunda |
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Description: 晶闸管六脉波整流,用与大功率电源谐波分析-six pulse converter
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Size: 13312 |
Author: yinjinfa |
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Description: 脉冲信号发生器：采用DDS技术实现脉冲信号的周期、脉冲宽度、幅值的数控调节。通过单片机与FPGA的并行通信技术将频率控制字及矩形脉冲数据传送给FPGA的双口RAM。模拟输出通道则将信号通过100MHz、8位D/A转换器将波形数据转换成模拟脉冲信号，最后通过高速运放构成的放大器放大，实现幅度连续可调。-The pulse signal generator: using the DDS technology to achieve the pulse signal cycles, pulse width and amplitude of the numerical control regulation. Through the microcontroller and FPGA parallel communications will frequency control characters and rectangular pulse data to the FPGA double mouth RAM. Analog output channel will signal through 100MHz, eight D/A converter will waveforms converted into analog pulse signal, finally through high-speed op-amp constitute the amplifier amplification, realize the continuous adjustable range.
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Size: 19456 |
Author: 张节 |
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Description: Twelve pulse converter for a single cycle of input twelve pulse will be available in output... simulation circuits-Twelve pulse converter for a single cycle of input twelve pulse will be available in output... simulation circuits..
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Size: 68608 |
Author: Sreelaxmy |
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Description: Six pulse converter is VSI converter used to convert the DC voltage to AC voltage using Sin Pulse Width Modulation technique.-Six pulse converter is VSI converter used to convert the DC voltage to AC voltage using Sin Pulse Width Modulation technique.
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Size: 12288 |
Author: sathish |
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Description: Twelve pulse converter is VSI converter used to convert the DC voltage to AC voltage using Sin Pulse Width Modulation technique.-Twelve pulse converter is VSI converter used to convert the DC voltage to AC voltage using Sin Pulse Width Modulation technique.
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Size: 17408 |
Author: sathish |
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Description: Twenty Four pulse converter is VSI converter used to convert the DC voltage to AC voltage using Sin Pulse Width Modulation technique.-Twenty Four pulse converter is VSI converter used to convert the DC voltage to AC voltage using Sin Pulse Width Modulation technique.
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Size: 16384 |
Author: sathish |
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Description: Forty Eight pulse converter is VSI converter used to convert the DC voltage to AC voltage using Sin Pulse Width Modulation technique.-Forty Eight pulse converter is VSI converter used to convert the DC voltage to AC voltage using Sin Pulse Width Modulation technique.
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Size: 24576 |
Author: sathish |
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Description: Three level pulse converter is VSI converter used to convert the DC voltage to AC voltage using Sin Pulse Width Modulation technique.-Three level pulse converter is VSI converter used to convert the DC voltage to AC voltage using Sin Pulse Width Modulation technique.
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Size: 11264 |
Author: sathish |
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Description: Introduction to pulse width modulation voltage converter using space vector method{Hassan A.Salbi}
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Size: 407552 |
Author: Troy |
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Description: Pulse code Modulation: The pulse code modulator technique samples the input signal x(t) at a sampling frequency. This sampled variable amplitude pulse is then digitalized by the analog to digital
converter. Figure.(1) shows the PCM generator.
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Size: 125952 |
Author: u20140801 |
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Description: 20 pulse converter for AC to DC rectifier
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Size: 466944 |
Author: Prabhakaran |
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Description: very important about pulse width modulation
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Size: 40960 |
Author: omar |
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Description: 此matlab图展示了一个对于直流发动机驱动的12相换流器。Y与三角形换流器在此使用-The model simulates twelve pulse converter for DC motor drive. Wye and Delta converters were connected in series to get the twelve pulses for the DC motor. Any firing angle can be be adjusted for the pulse generating block. The basic concept is that the there exist the angle of 30 degree in voltages of wye and delta connected circuits, so two converters connected with wye and delta windings can provide 12 pulses in the cycle of power frequency described in this simulation.
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Size: 12288 |
Author: 徐扬坤 |
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Description: === === === === === === === === === === ===
3． 比例电压变换器
要求：利用A/D和D/A实现将A/D的输入电压反向变换的功能，即A/D的输入电压
从0-5V变化时，D/A的输出电压相应的从+5V-0V变化。
控制功能：将仿真试验箱上的电位器W1产生0-5V电压输入到ADC0809的通道0。
利用74LS393将4MHz晶振产生的脉冲信号八分频后做为ADC0809的时钟信号
使用的主要元器件：8031、6MHz的晶振、74LS373、74LS138、2764、
4MHz晶振、74LS04、74LS393、ADC0809、DAC0832、LM324、电位器W1等。
结果验证：①用示波器检查ADC0809的时钟频率是否为500KHz。②旋动电位器W1
产生0-5V的电压，用数字万用表测量D／A的输出是否从5→0V变化。
③使W1的输出电压从0V开始，以0.5V为增量，测量D/A的输出电压并记录。
试分析误差产生的原因。-================================================== ============= 3. Proportional voltage converter requirements: the A/D and D/A to achieve the A/D input voltage inverse transform function, namely the A/D input voltage change 0-5V, D/A output voltage corresponding change from+5V-0V. Control functions: the potentiometer simulation chamber on W1 generate 0-5V voltage input to the ADC0809 channel 0. Use 74LS393 After pulse 4MHz crystal oscillator frequency as ADC0809 eighth clock signal the main components used: 8031,6MHz crystal, 74LS373,74LS138,2764, 4MHz crystal, 74LS04,74LS393, ADC0809, DAC0832 , LM324, potentiometer W1 and the like. Results show: ① ADC0809 oscilloscope to check whether the clock frequency of 500KHz. ② Turn the potentiometer W1 if a voltage of 0-5V, digital multimeter to measure the D/A output 5 → 0V change. ③ make W1 output voltage 0V to 0.5V increments measured D/A output voltage and recorded. Try to analyze the causes of error.
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Size: 28672 |
Author: 杨明 |
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