Development of PZT Multi-Channel Power Supply Based on PA93

2011 ◽  
Vol 48-49 ◽  
pp. 428-433 ◽  
Author(s):  
Wei Fan ◽  
Chang Cai Cui ◽  
Zhong Shen Li
Keyword(s):  
Power Supply ◽  
Piezoelectric Ceramic ◽  
Output Voltage ◽  
Output Current ◽  
Channel Power ◽  
Nonlinear Error ◽  
Voltage Variation ◽  
Continuous Output ◽  
Continuous Working ◽  
Power Channel

Good performance of driving power supply is the key to achieve high-precision positioning of the piezoelectric ceramic. In this paper, mainly from the expansion of power channel, lower ripple and interference, reducing the volume and temperature control of amplifier such aspects, developed PZT multi-channel power supply based on PA93 power amplifier, and completed the corresponding experiments of the calibration characteristics. By testing, the output voltage of eight channels shows good linearity, the nonlinear error is less than 0.05％. the resolution is 6mv, the static ripple voltage is less than 9mV, the power bandwidth could be 5kHz, the continuous output current could be 1.5A, the voltage variation is less than 0.01％ after eight hours continuous working. The volume of power supply is only 280*260*120mm, the power supply could satisfy the requirements of PZT driving.

A Dual-Loop-Based Parallel Power Supply System

2013 ◽  
Vol 655-657 ◽  
pp. 1609-1613
Author(s):  
Yu Hao Zhang
Keyword(s):  
Power Supply ◽  
Output Voltage ◽  
Power Supply System ◽  
Control Method ◽  
Supply System ◽  
Digital Calibration ◽  
Numerical Control ◽  
Output Current ◽  
Loop Control ◽  
High Efficient

The dual-loop control method, in which inner-loop is the current and outer-loop is the voltage, is proposed to design a high-efficient precise numerical control parallel power supply system, it operates at input voltage of 24V, output voltage of 6-12V and output current of 0-4A. The current ratio of the parallel circuits can be set arbitrarily. Precise adjustment of output current and improvement of efficiency are realized by width modulation and synchronous buck-topology switching power supply, the output current error is smaller than 20mA and DC-DC conversion efficiency is up to 90%; to make output voltage error smaller than 30 mV and the current-sharing error smaller than 0.5%, digital calibration technology and PID control algorithm are used. In addition, this system is equipped with the function of overload protection, double-source redundant heat standby and turn-off, etc.

The Error Analysis of Micro-Flow Self-Sensing Actuator

2015 ◽  
Vol 645-646 ◽  
pp. 972-979
Author(s):  
Yan Bo Wei ◽  
Li Ping Shi ◽  
Hai Zhou
Keyword(s):  
Theoretical Analysis ◽  
Flow Injection ◽  
Piezoelectric Ceramic ◽  
Output Voltage ◽  
Piezoelectric Effect ◽  
External Factors ◽  
Output Displacement ◽  
Nonlinear Error ◽  
Direct Piezoelectric Effect ◽  
Micro Flow

In this article the micro flow self-sensing actuator has carried on the theoretical analysis and experimental research. Using output micro-displacement generated by the first inverse piezoelectric effect to realize cell micro flow injection, using output voltage generated by secondary direct piezoelectric effect of piezoelectric ceramic to self-sensing the output displacement in the process of the micro flow injection. The experimental results show that the micro-displacement of micro-flow self-sensing actuator has nonlinear error, error is 5.03%. The error between measured micro-displacement and self-sensing micro-displacement is 63.13%. In this paper, the error causes analysis of micro-flow self-sensing actuator is from non-linearity and hysteresis, external factors, it lay the foundation for the further study of micro-flow self-sensing actuator.

Development of Switching Power Supply with Precision Continuously Adjustable High Voltage

2012 ◽  
Vol 516-517 ◽  
pp. 1512-1516
Author(s):  
Kai Bin Chu ◽  
Nu Wang ◽  
Shu Yue Chen ◽  
Bao Xiang He
Keyword(s):  
High Voltage ◽  
Power Supply ◽  
Output Voltage ◽  
Pulse Width Modulation ◽  
Maximum Output ◽  
Switching Power Supply ◽  
Constant Frequency ◽  
Switching Power ◽  
Continuous Output ◽  
Frequency Pulse

The techniques for developing a kind of the precision continuously adjustable high-voltage switching power supply are proposed, based on the constant frequency pulse width modulation strategies with SG3525, and the continuous output voltage adjustment effect is achieved through a gain amplifier controlled by MCU. The circuit is of the significant features such as high precision output voltages, continuously adjustable, a wide adjustment range and a low power consumption. The results of the experiments show that the output voltage is adjustable between 1KV and 25KV, and the maximum output voltage error is 1.6%.

Control Method Research of Parallel Operation of Power System with Multiple Sources

2014 ◽  
Vol 945-949 ◽  
pp. 1583-1586
Author(s):  
Jia Ling Yu ◽  
Long Han Cao ◽  
Hao Mu ◽  
Jing Nan Li
Keyword(s):  
Fuzzy Control ◽  
Power Supply ◽  
Output Voltage ◽  
Control Method ◽  
Supply Voltage ◽  
Energy Utilization ◽  
Output Current ◽  
Multiple Sources ◽  
Power Sources ◽  
Multiple Power

The parallel connection of multiple power supplies generates output current only depended on the highest power voltage because of the unmatched precision of output voltage and imbalance output power. On account of lacking an appropriate way to solve that current problem presently, this paper presents a multiple power sources control method based on fuzzy control. According to the output voltage error and its change rate of each power source, this method modulates PWM by fuzzy control to keep each voltage conversion circuit share the same output voltage. So the output current of power multiple sources is equal to the sum of multiple power current, make the available power supply at the same time, solve the countercurrent and output current offered by the supreme power supply voltage, increase the energy utilization.

The Design of Parallel DC-DC Power

2012 ◽  
Vol 562-564 ◽  
pp. 1472-1475
Author(s):  
Hua Lin Zhang ◽  
Xiao Fang Zhou
Keyword(s):  
Software Design ◽  
Power Supply ◽  
Output Voltage ◽  
Switching Power Supply ◽  
Output Current ◽  
Switching Power ◽  
Dc Power ◽  
Voltage Output ◽  
Parallel Module ◽  
Test Result

With TL494 as the drive chip, MCU controlling output voltage, output current, parallel module average flow, over-current protection, it gives priority to BUCK circuit topology to realize parallel switching power supply. This article introduces the system design, the hardware and software design in detail. Finally a 32W prototype is designed. The test result shows that the design can achieve the preset functions, its performances can meet the requirements and it can work stably.

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