Design of a sine-wave constant current source switching power supply for laser applications

1988 ◽  
Vol 21 (7) ◽  
pp. 663-666 ◽  
Author(s):  
I V Chaltakov
Keyword(s):  
Power Supply ◽  
Current Source ◽  
Sine Wave ◽  
Constant Current ◽  
Switching Power Supply ◽  
Laser Applications ◽  
Constant Current Source ◽  
Switching Power

Design of a Sine Sweeping Constant Current Source Based FPGA and DDS

2014 ◽  
Vol 936 ◽  
pp. 2230-2234
Author(s):  
Ya Ping Yu ◽  
Hui Zhao ◽  
Yuan Liu ◽  
Ren Jie Yang ◽  
Gui Mei Dong ◽  
...  
Keyword(s):  
Frequency Control ◽  
Current Source ◽  
Sine Wave ◽  
Constant Current ◽  
Constant Current Source ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Low Pass ◽  
Fpga Chip ◽  
Sine Wave Generator

This paper designed a range of 0.1 ~ 250 kHz sine wave sweeping constant current source, which sine wave generator based on FPGA chip and DDS technology, the desired sine wave frequency was obtained by controlling the frequency control words. Low-pass filter circuit was realized by using the LTC1560-1, conversion circuit from the voltage to the current was consisted of a Howland current pump. The constant current source shows a good spectral impedance purity and amplitude.

The Design of a New-Type LED Switching Power Supply Circuit

2014 ◽  
Vol 986-987 ◽  
pp. 1877-1880
Author(s):  
Elin Jing ◽  
Zheng Feng Sun ◽  
Hong Yuan Wen
Keyword(s):  
Power Supply ◽  
Current Mode ◽  
Input Voltage ◽  
Constant Current ◽  
Switching Power Supply ◽  
Voltage Range ◽  
Supply Circuit ◽  
Switching Power ◽  
Power Supply Circuit ◽  
New Type

A new-type LED switching power supply circuit using flyback converter is designed based on current-mode PFC controller chip L6562. The circuit has some characteristics such as simple structure, wide input voltage range, output stability and reliable operation. The experimental results show that the system efficiency is up to 89.46% when the input voltage changes from 85V to 265V(AC), meanwhile the system works stably with constant current and constant voltage output.

Design of Hi-Power Continuously Adjustable Constant Current Source Based on UC3846

2012 ◽  
Vol 430-432 ◽  
pp. 1519-1523 ◽  
Author(s):  
Yong Li ◽  
Cheng Rui Zhang ◽  
Ming Xing Lin ◽  
Yong Hua Li
Keyword(s):  
Power Supply ◽  
Control Method ◽  
Dynamic Performance ◽  
Current Source ◽  
Current Mode ◽  
Response Speed ◽  
Constant Current ◽  
Constant Current Source ◽  
Good Guide ◽  
Reduce Risk

This paper designs the switch adjustable constant current source based on the current mode PWM control chip UC3846, the power reach to 8kw, current 0~15A continuously adjustable. It uses the I2 control method to ensure the accuracy of the output current stability and improve the dynamic performance and response speed of the system. Feedback signals achieve in external circuit of the chip UC3846, they independent to each other to ensure the accuracy of the control signal. The model of UC3846 and the power supply were built by using Matlab Simulink separately. After building those models, the circuit was simulated by using Simulink, and its simulation results reflected the output of power supply truthfully which played a good guide for the circuit design and experiment, to avoid detours and reduce risk.

System anti-jamming technology in the design of intelligent single chip computer constant current source of field strength machine

2021 ◽  
pp. 1-11
Author(s):  
Lin Li
Keyword(s):  
Decision Making ◽  
Low Power ◽  
Power Supply ◽  
Current Source ◽  
Testing Equipment ◽  
Automatic Testing ◽  
Constant Current ◽  
Constant Current Source ◽  
Rule Based ◽  
Decision Engine

With the development of the electric power industry, the technical level of automatic testing equipment for the reliability of electrical component circuit breakers in the transmission and distribution network is getting higher and higher. The stability and accuracy of the test power supply are the basis for ensuring the pass rate of the test product. Most of the electrical testing and testing equipment has defects such as inaccurate power supply current regulation, low power, and low level of intelligence, which are difficult to meet the testing requirements. Based on the theory of a closed-loop control system, this paper adopts embedded system design technology to realize a high-current, high-power, high-stability digital constant current source system for line detection. This paper studies the rule-based intelligent anti-jamming decision engine design and system anti-jamming performance analysis of NC-OFDM system. We give the design of an intelligent anti-jamming decision engine based on rule-based decision-making, and focus on two intelligent anti-jamming decision-making algorithms: Adaptive Modulation and Coding (AMC) algorithm based on signal-to-noise ratio difference and packet error rate and Adaptive Sub-Band Selection (ASBS) algorithm. Experimental test results show that the output current range is 200 mA to 2000 mA, the system has realized a microstep adjustment of±5 mA, and the absolute error of current measurement is less than 0.3%+4 mA. The system is stable and reliable, and has high practical value in the field of high precision and low power.

Design of DFB Laser Drive and Temperature Control Circuit in TDLAS Gas Concentration Detection

2020 ◽  
Author(s):  
Haoqing Yang ◽  
Xiongzhu Bu ◽  
Yihan Cao ◽  
Yang Song
Keyword(s):  
Temperature Control ◽  
Detection System ◽  
Current Source ◽  
Sine Wave ◽  
Control Circuit ◽  
Constant Current ◽  
Temperature Control System ◽  
Constant Current Source ◽  
Dfb Laser ◽  
On Chip

Abstract In order to satisfy the requirements of TDLAS gas measurement, the DFB laser drive and temperature control system is designed with taking STM32F103RCT6 as the main control chip, including sine wave and sawtooth signal generation circuit, temperature acquisition circuit and temperature control circuit, etc. The sine wave and the sawtooth wave signal are respectively generated by using the DDS chip and the STM32 on-chip DAC, and the two are superimposed to control the constant current source to drive the laser. At the same time, the internal temperature of the laser is collected and controlled. The DFB laser with a center wavelength of 1653.7 nm is used to verify the CH4. The experiment proves that the system can generate stable laser driving signals and achieve precise temperature control. The temperature control accuracy can reach ±0.013 °C. The design satisfies the requirements of TDLAS gas detection system for laser driving and temperature control.

Research on Coating Devices with Applied Technology in Magnetron Sputtering Regulated Switching Power Supply Design

2014 ◽  
Vol 540 ◽  
pp. 134-137 ◽  
Author(s):  
Zhi Wen Zhou ◽  
Cai Xia Wang ◽  
An Ren Ma
Keyword(s):  
Power Supply ◽  
High Efficiency ◽  
High Reliability ◽  
Current Control ◽  
Constant Current ◽  
Switching Power Supply ◽  
Control Effect ◽  
Practical Applications ◽  
Switching Power ◽  
Applied Technology

Magnetron power supply is one of the most important components in coating devices in applied technology. Magnetron regulated power supply with high power and high efficiency is studied and designed on the basis of high-frequency switching power supply technology. The principle of the main circuit and control circuit design are introduced. A MATLAB simulating model is composed to study parameters and waveforms of the designed circuits. The hardware circuit and software program are designed based on simulation results. The adjustment and display of the output voltage and the output current of the power supply under different work modes are achieved with TMS320F2812 DSP system. Practical applications confirm that the designed power supply has good constant current control effect, high reliability and working stability.

Design and Simulation of LED Drive Power Supply Based on ARM

2012 ◽  
Vol 588-589 ◽  
pp. 936-939
Author(s):  
Hong Li Cheng ◽  
Xiao Dan Ren ◽  
Shuai Sun
Keyword(s):  
Power Supply ◽  
High Efficiency ◽  
Current Source ◽  
Constant Current ◽  
Voltage Source ◽  
Drive Power ◽  
Small Current ◽  
Constant Current Source ◽  
Pid Algorithm ◽  
In Series

This paper introduces a kind of numerical controlled LED drive power supply based on ARM7. User can set the number and brightness of the LEDs to be lit by the remote control. Switching voltage source and the linear constant current source are connected in series, this circuit structure can ensure high efficiency and small current ripple. ARM7 completes the data collection, fuzzy PID algorithm processing, and real-time output adjustment. This paper explains the working principle of the system in detail and then simulates it in the simulink. The results show that it can satisfy the users' diverse requirements well and give full play to the convenience and controllability of the digital controller.

Current-source 1-Ph inverter design for aircraft applications

2020 ◽  
Vol 92 (8) ◽  
pp. 1295-1305
Author(s):  
Eralp Sener ◽  
Gurhan Ertasgin
Keyword(s):  
Pulse Width Modulation ◽  
High Efficiency ◽  
Current Source ◽  
Sine Wave ◽  
Constant Current ◽  
Constant Current Source ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Content Type ◽  
Loop Control

Purpose This paper aims to present an inverter with a current-source input for 400 Hz avionic systems to have a system which removes DC-link capacitors and presents a high efficiency. Design/methodology/approach A battery-powered DC link inductor generates a constant-current source. A single high-frequency switch is used to provide a sinusoidally modulated current before the inverter. The output of the switch is “unfolded” by a thyristor-based H-bridge inverter to generate an AC output current. The system uses a CL low-pass filter to obtain a 400 Hz pure sine wave by removing pulse width modulation components. Findings Simulations and Typhoon HIL real-time experiments were performed with closed-loop control to validate the proposed inverter concept while meeting the critical standards of MIL-STD-704F. Originality/value This current source inverter topology is suitable for avionic systems that require 400 Hz output frequency. The topology uses small DC-link inductor and eliminates bulky capacitor which determines the inverter lifetime.

The Electric Car Charger Control Circuit Design and Analysis Module

2014 ◽  
Vol 971-973 ◽  
pp. 942-945
Author(s):  
Ying Chun Liu ◽  
Jian Ming Zhang ◽  
De Long Zhang ◽  
Yan Yu Wang ◽  
Chun Guang Hou ◽  
...  
Keyword(s):  
Circuit Design ◽  
Power Supply ◽  
Design Thinking ◽  
Control Circuit ◽  
Constant Current ◽  
Circuit Switching ◽  
Switching Power Supply ◽  
Switching Power ◽  
Electric Car ◽  
Front End

the article introduces theelectric car charger control circuit design thinking and ideas, the controlcircuit to be able to with the front-end circuit switching power supply and MCUto cooperate to complete the following phases the constant current and constantvoltage charging battery automatic conversion, and stable in each phase of thecurrent value or the voltage value. Analyze the circuit module, includingsampling module, PWM signal module, proportional amplifier module, PIadjustment module.

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