Description: Manufacturers of electronic systems that require power
conversion are faced with the need for higher-density dc-to-dc
converters that perform more efficiently,-Manufacturers of electronic systems that require power conversion are faced with the need for higher-density dc-to-dc converters that perform more efficiently, Platform: |
Size: 787240 |
Author:温生 |
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Description: 电机领域里最常遇到的交直流转换器研讨对这方面有研究的人可以参考本篇文章-motor areas most frequently encountered by AC-DC converters discuss research in this field who can refer to this report Platform: |
Size: 3274567 |
Author:陈文豪 |
Hits:
Description: 本系统以直流电流源为核心，AT89S52单片机为主控制器，通过键盘来设置直流电源的输出电流，设置步进等级可达1mA，并可由数码管显示实际输出电流值和电流设定值。本系统由单片机程控输出数字信号，经过D/A转换器（AD7543）输出模拟量，再经过运算放大器隔离放大，控制输出功率管的基极，随着功率管基极电压的变化而输出不同的电流。单片机系统还兼顾对恒流源进行实时监控，输出电流经过电流/电压转变后，通过A/D转换芯片，实时把模拟量转化为数据量，再经单片机分析处理， 通过数据形式的反馈环节，使电流更加稳定，这样构成稳定的压控电流源。实际测试结果表明，本系统输出电流稳定，不随负载和环境温度变化，并具有很高的精度，输出电流误差范围±5mA，输出电流可在20mA~2000mA范围内任意设定，因而可实际应用于需要高稳定度小功率恒流源的领域。-the system to DC current source to the core, MCU AT89S52 main controller, through the keyboard to set up DC power supply output current, set up to 1mA Stepping grades, digital control can be shown by the actual output current value and current setting. The system consists of programmable microcontroller digital signal output, after the D / A converters (AD7543) analog output. After Operational Amplifiers isolation, amplification and control of the output power base. With the power of the base voltage changes in the output current. SCM system also takes on the constant current source for real-time monitoring, after current output current / voltage changes, the A / D converter chip, real-time conversion from analog to the volume of data and then analyzed by the MCU, through data link in the Platform: |
Size: 197253 |
Author:DAI |
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Description: The TPS6205x devices are a family of high-efficiency
Converter With up to 95％ Efficiency synchronous step-down dc/dc converters ideally suited
· 12-µ A Quiescent Current (Typ) for systems powered from a 1-cell or 2-cell Li-Ion
battery or from a 3-cell to 5-cell NiCd, NiMH, or alkaline · 2.7-V to 10-V Operating Input Voltage Range
battery. · Adjustable Output Voltage Range From 0.7 V
to 6 V The TPS62050 is Platform: |
Size: 292925 |
Author:your name |
Hits:
Description: Manufacturers of electronic systems that require power
conversion are faced with the need for higher-density dc-to-dc
converters that perform more efficiently,-Manufacturers of electronic systems that require power conversion are faced with the need for higher-density dc-to-dc converters that perform more efficiently, Platform: |
Size: 787456 |
Author:温生 |
Hits:
Description: 电机领域里最常遇到的交直流转换器研讨对这方面有研究的人可以参考本篇文章-motor areas most frequently encountered by AC-DC converters discuss research in this field who can refer to this report Platform: |
Size: 3274752 |
Author:陈文豪 |
Hits:
Description: 本系统以直流电流源为核心，AT89S52单片机为主控制器，通过键盘来设置直流电源的输出电流，设置步进等级可达1mA，并可由数码管显示实际输出电流值和电流设定值。本系统由单片机程控输出数字信号，经过D/A转换器（AD7543）输出模拟量，再经过运算放大器隔离放大，控制输出功率管的基极，随着功率管基极电压的变化而输出不同的电流。单片机系统还兼顾对恒流源进行实时监控，输出电流经过电流/电压转变后，通过A/D转换芯片，实时把模拟量转化为数据量，再经单片机分析处理， 通过数据形式的反馈环节，使电流更加稳定，这样构成稳定的压控电流源。实际测试结果表明，本系统输出电流稳定，不随负载和环境温度变化，并具有很高的精度，输出电流误差范围±5mA，输出电流可在20mA~2000mA范围内任意设定，因而可实际应用于需要高稳定度小功率恒流源的领域。-the system to DC current source to the core, MCU AT89S52 main controller, through the keyboard to set up DC power supply output current, set up to 1mA Stepping grades, digital control can be shown by the actual output current value and current setting. The system consists of programmable microcontroller digital signal output, after the D/A converters (AD7543) analog output. After Operational Amplifiers isolation, amplification and control of the output power base. With the power of the base voltage changes in the output current. SCM system also takes on the constant current source for real-time monitoring, after current output current/voltage changes, the A/D converter chip, real-time conversion from analog to the volume of data and then analyzed by the MCU, through data link in the Platform: |
Size: 196608 |
Author: |
Hits:
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. Platform: |
Size: 52224 |
Author:苏永生 |
Hits:
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. Platform: |
Size: 50176 |
Author:苏永生 |
Hits:
Description: The TPS6205x devices are a family of high-efficiency
Converter With up to 95％ Efficiency synchronous step-down dc/dc converters ideally suited
· 12-µ A Quiescent Current (Typ) for systems powered from a 1-cell or 2-cell Li-Ion
battery or from a 3-cell to 5-cell NiCd, NiMH, or alkaline · 2.7-V to 10-V Operating Input Voltage Range
battery. · Adjustable Output Voltage Range From 0.7 V
to 6 V The TPS62050 is-The TPS6205x devices are a family of high-efficiencyConverter With up to 95 Efficiency synchronous step-down dc/dc converters ideally suited 12-μ A Quiescent Current (Typ) for systems powered from a 1-cell or 2-cell Li- Ionbattery or from a 3-cell to 5-cell NiCd, NiMH, or alkaline 2.7-V to 10-V Operating Input Voltage Rangebattery. Adjustable Output Voltage Range From 0.7 Vto 6 V The TPS62050 is Platform: |
Size: 292864 |
Author:your name |
Hits:
Description: Electronic switch-mode DC to DC converters convert one DC voltage level to another, by storing the input energy temporarily and then releasing that energy to the output at a different voltage. The storage may be in either magnetic field storage components (inductors, transformers) or electric field storage components (capacitors). This conversion method is more power efficient (often 75 to 98 ) than linear voltage regulation (which dissipates unwanted power as heat).-Electronic switch-mode DC to DC converters convert one DC voltage level to another, by storing the input energy temporarily and then releasing that energy to the output at a different voltage. The storage may be in either magnetic field storage components (inductors, transformers) or electric field storage components (capacitors). This conversion method is more power efficient (often 75 to 98 ) than linear voltage regulation (which dissipates unwanted power as heat). Platform: |
Size: 12288 |
Author:vasanth |
Hits:
Description: This paper presents digital simulation of ZVS half bridge DC to DC converter with
modified PWM control. The switching losses are reduced by using soft switching.
Conventional and duty cycle shifted PWM DC to DC converters are simulated using
matlab simulink and the results are presented. The principle of operation and the key
features of modified PWM DC to DC converter are also presented. Platform: |
Size: 328704 |
Author:hak |
Hits:
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