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.

The Design of Digital Direct Current Source Based on Nios II

2013 ◽  
Vol 313-314 ◽  
pp. 316-319
Author(s):  
Qing Qing Fu ◽  
Ai Ping Wu
Keyword(s):  
Direct Current ◽  
Field Effect Transistor ◽  
Current Source ◽  
Hard Core ◽  
Constant Current ◽  
Output Current ◽  
Constant Current Source ◽  
Nios Ii ◽  
Effect Transistor ◽  
Current Value

In this paper, a digital direct current source based on Nios II is studied. The system adopts FPGA as hard core and the main circuit of constant current source consisting of operational amplifier LM358 and power Field Effect Transistor (FET) IRF530. In addition, 12 bit D/A chip MAX531 and 12 bit A/D chip TLC549 are used to monitor the output current. The system outputs current from 20mA to 2000mA with 0.5mA step level, the set current value and actual output current value can be displayed by LCD. Result shows that the system has characteristics of high precision, good stability, small size and high integration.

Research of High Precision DC Constant Current Source

2013 ◽  
Vol 340 ◽  
pp. 933-936
Author(s):  
Dan Su ◽  
Zhi Hong Zhang ◽  
Jin Ping Zhao
Keyword(s):  
High Precision ◽  
Rocket Engine ◽  
Current Source ◽  
Engine Performance ◽  
Performance Testing ◽  
Constant Current ◽  
Output Current ◽  
Constant Current Source ◽  
New Type ◽  
Model Rocket Engine

In this paper, we designed a new type of high precision 1 μA constant current source after deeply studying the high precision precise dc constant current source. Compared with the traditional constant current source, in this paper we adopted complex amplifier added with floating power supply outside to design high precision dc constant current source which is for China's space use , its output current is 1 μA, resolution is 0.1 nA, accuracy is 0.5. This high precise dc constant current source is mainly used for new model rocket engine performance testing in aerospace, but also can be widely applied in different fields in need of precision measurement.

Design of Constant Current Source Based on Pulse Width Modulation

2013 ◽  
Vol 645 ◽  
pp. 418-421
Author(s):  
Li Hui Sun ◽  
Shu Jing Wang ◽  
Wei Chen
Keyword(s):  
High Precision ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Current Source ◽  
Constant Current ◽  
Output Current ◽  
Constant Current Source ◽  
Current Output ◽  
High Conversion Efficiency ◽  
Working Principle

Design of the constant current source based on pulse width modulation, and its working principle are discussed. The design can adjust the output current through pulse width modulation (PWM), and realize micro regulation by feedback output which stabilizes current output. The constant current source has some advantages of high precision, stable work, high conversion efficiency.

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.

Based on the Design of the Single Chip Microcomputer Numerical Control Constant Current Source

2014 ◽  
Vol 926-930 ◽  
pp. 1226-1229
Author(s):  
Zhi Jian Yin ◽  
Qiang Luo ◽  
Kun Xiang ◽  
Fan Wang
Keyword(s):  
Current Source ◽  
Current Control ◽  
Numerical Control ◽  
Constant Current ◽  
Single Chip ◽  
Output Current ◽  
Single Chip Microcomputer ◽  
Constant Current Source ◽  
Display Module ◽  
Lcd Display

This system based on single-chip microcomputer control, with buttons and LCD monitor as the man-machine interface of numerical control dc power supply. System is mainly composed of rectification filter circuit, the output current control module, LCD display module current and voltage controlled constant current module. Button to SCM number controls the size of the output current DAC0832, LCD display the current value. This system controlled by single chip microcomputer DA output, make the whole circuit system has a stable output current, step precision is high, easy to control, etc.

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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