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.

Design of Digital Control DC Voltage Source Based on AT89C52 MCU

2014 ◽  
Vol 484-485 ◽  
pp. 1126-1129
Author(s):  
Wei Wang
Keyword(s):  
Current Source ◽  
Step Function ◽  
Constant Current ◽  
Voltage Source ◽  
Constant Voltage ◽  
Good Reliability ◽  
Constant Current Source ◽  
Display Module ◽  
Dc Voltage ◽  
The Core

the system to DC voltage source as the core, AT89C52 MCU as the main controller, the output voltage to set the DC power supply through the keyboard, with a step function voltage to reality, the actual output value. This design is divided into four modules: SCM control and display module, digital to analog (D/A) conversion module, a constant voltage source module, output module. MCU control module as the core, the input signal is converted to digital quantity output; constant current source module voltage D/A conversion to analog conversion into constant pressure through a constant voltage circuit. The system has good reliability, high precision.

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.

Study on Hi-Power Precision Driving Power of Giant Magnetostrictive Actuator Based on Power Amplifiers

2011 ◽  
Vol 121-126 ◽  
pp. 2293-2298
Author(s):  
Yong Li ◽  
Cheng Rui Zhang ◽  
Xin Zhong Ding ◽  
Peng Zhai ◽  
Jing Wu
Keyword(s):  
High Efficiency ◽  
Current Source ◽  
Constant Current ◽  
Source Analysis ◽  
Output Current ◽  
Constant Current Source ◽  
Giant Magnetostrictive Material ◽  
Large Current ◽  
Magnetostrictive Actuator ◽  
Large Output

According to the driving characteristics of giant magnetostrictive material and the principle of constant current source analysis, the continuously adjustable driving power was developed by adopting the principle of constant current, selecting power operational amplifier, and using parallel flow technology to expand its output current, which had a large current, large output power, high efficiency and low power consumption. And through the actual test, the driving power of giant magnetostictive actuator reveals a good performance.

Advanced LIVA/TIVA Techniques

2001 ◽  
Author(s):  
R. Aaron Falk
Keyword(s):  
Integrated Circuits ◽  
Integrated Circuit ◽  
Current Source ◽  
Fault Isolation ◽  
Constant Current ◽  
Voltage Source ◽  
Constant Voltage ◽  
Constant Current Source ◽  
Current Sensing ◽  
Order Of Magnitude

Abstract LIVA (L ight I nduced V oltage A lterations) and TIVA (T hermally I nduced V oltage A lterations) have demonstrated significant capability for fault isolation. A difficulty with both techniques is their use of a constant current source, whereas integrated circuits operate with a constant voltage source. A new technique that utilizes the constant current sensing of LIVA/TIVA, while allowing for use of constant voltage bias on the integrated circuit, has been developed. As a bonus, the technique is also significantly more sensitive (at least one order of magnitude) than the standard LIVA/TIVA approach.

Design of Low Power Lighting LED Driver with Multiplex Divided Constant Current Source

2013 ◽  
Vol 380-384 ◽  
pp. 3204-3208
Author(s):  
Fei Yu ◽  
Zhao Jie
Keyword(s):  
Low Power ◽  
Heat Dissipation ◽  
Low Cost ◽  
Current Source ◽  
Constant Current ◽  
Voltage Source ◽  
Led Driver ◽  
Constant Current Source ◽  
Good Efficiency ◽  
Driver Circuit

Low power lighting LED has the advantages of low cost and good heat dissipation. But the current driver for this kind of LED does not have a good efficiency. In this paper a new kind of LED driver circuit was designed. By using current mirror and PWM technique, the circuit has good efficiency. By simulation with PSPICE, we can prove that the circuit has can divide current equally and has a good performance while the voltage source has some jitters.

Study on the Application of High Precision Strain Acquisition System Based on Twin-Constant-Current Source

2013 ◽  
Vol 437 ◽  
pp. 399-403
Author(s):  
Zong Ju Hu ◽  
Zeng Yong Long
Keyword(s):  
Current Source ◽  
Acquisition System ◽  
Constant Current ◽  
Voltage Source ◽  
Constant Current Source ◽  
Strain Collection ◽  
High Measurement ◽  
Fan Blade ◽  
Lab Test ◽  
Deformation Tests

Aiming at the shortcomings of the constant voltage source strain acquisition system, the paper put forward a new strain acquisition technology based on the double-side half-bridge measurement of the constant current source. It has demonstrated and analyzed the advantages of constant current source circuit using for strain collection, and has raised the design of multi-channel strain acquisition system. Lab test and running in a large fan blade deformation tests showed that the strain acquisition system had high measurement precision, stability, anti-interference and reliability.

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.

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