Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Journal of Mechanical Engineering》 2009-04
Add to Favorite Get Latest Update

Dither Algorithm in Pulse Width Modulation

ZHU Yutian TANG Xinghua(College of Mechanical Engineering, Tongji University, Shanghai 201804)  
Pulse width modulation(PWM) has become the standard for electro-hydraulic proportion valve amplifiers for it is efficient, flexible and anti-interference.Meanwhile, the dynamic characteristics of a proportional valve can be improved by superimposing dithers to the valve coil.Aiming at the two control parameters, the frequency and the duty ratio of the PWM, the algorithm of the parasitic dither in low frequency PWM is deduced.The result shows that the amplitude and frequency of the dither cannot be set independently.In a high frequency PWM, dither with independent frequency and amplitude can be generated separately by changing the duty ratio of the pulses.According to the current in inductive loads, the algorithms for two types of dither, one in sine wave envelop and another in triangle wave envelap, are deduced respectively.Numeric emulation agrees with the experiment result.The algorithm particularly suits for digital signal processing and control system.
【Fund】: 国家科技支撑计划资助项目(2007BAF10B00)。
【CateGory Index】: TN787.2
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
【References】
Chinese Journal Full-text Database 2 Hits
1 TANG Xing-hua(Shanghai Technology Center,Huadian Heavy Equipment Corporation,Shanghai 200122,China);The Drive of the Pulse Width Modulation with Dither Based on DSP[J];Machinery & Electronics;2010-09
2 ZHANG Li 1 LIU Kun1 CHEN Xiaofei1 WANG Bo2 (1.College of Aerospace and Materials Engineering, National University of Defense Technology,Changsha 410073; 2.Navy Deputy Office of Changzhou Area,Changzhou 213022);FPGA-based Approach to the Modulation Algorithm of Three-level PWM Magnetic Bearing Power Amplifier for Flywheel Systems[J];Journal of Mechanical Engineering;2010-20
【Co-references】
Chinese Journal Full-text Database 10 Hits
1 Zang Xiaomin Wang Xiaolin Qiu Zhijian Deng Zhiquan (Nanjing University of Aeronautics & Astronautics Nanjing 210016 China);An Improved Current-Controlled Tristate Switching Power Amplifier for Magnetic Bearings Based on Sample-Hold Strategy[J];Transactions of China Electrotechnical Society;2004-10
2 LI Bin, DENG Zhi quan, YAN Yang guang (Nanjing Aeronautics and Astronautics University, Nanjing 210016, China);Current Mode Switching for Tri-state Amplifiers in Magnetic Bearing Control System Supporting High Speed Motors[J];Power Electronics;2003-04
3 LIANG Xi-wen,CAI Li-juan(South China University of Technology,Guangzhou 510640,China);Fouier Analysis and Compensation Strategy of Dead-time Effects for Inverters[J];Power Electronics;2006-06
4 TIAN She-ping,CAI Ping,CHEN Hong-liang,ZHANG Feng(School of Electrical and Electronic Eng.,Shanghai Jiao Tong Univ.,Shanghai 200030,China);Analysis and Numerical Simulation of Wen's Bridge Oscillating Circuit[J];Journal of Electrical & Electronic Education;2007-03
5 CHEN Wei ZHANG Kai DAI Xing Jian (Department of Engineering Physics,Tsinghua University,Beijng 100084,China);Signal modulation circuit design of the half-bridge LVDT based on AD698 for high sensitivity applications[J];Application of Electronic Technique;2008-07
6 Lingyun Yan;Design of high pressure proportional electro-magnel[J];Construction Machinery and Equipment;1995-01
7 ;Working mode of DC PWM driver[J];Optics Mechanics & Electronics Information;2004-07
8 Hong Zhigang~(1) Du Weiling~(2) Zhou Ling~(3)(1.The Dept.of Electronic Engineering,HUNAN Vocational College of Science & Technology,Changsha,Hunan,410004)(2.The Dept.of Electronic Engineering,Branch College of North University of China,Taiyuan,Shanxi,030008)(3.Institute of Opto-electronic Information Technology,North University of China,Taiyuan,shanxi,030051,China);Signal transducer circuit design of the half-bridge LVDT[J];Foreign Electronic Measurement Technology;2006-05
9 ZENG Wei,LIAO Li-qing,CHEN Hua-xing(School of Information Science and Engineering,Central South University,Changsha 410083,China);Interface design and control implementation between LCD and DSP[J];International Electronic Elements;2006-11
10 TENG Hong-qiu (Dept. of Computer,Guangdong Science & Commerce Vocation College,Guangzhou 510460,China);Output Interface Design for 2407DSP PWM Signal[J];Ordnance Industry Automation;2007-03
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved