[1]罗珺,阮程,徐寅林,等.具有精确基准频率的数控半桥PWM输出调整电路[J].南京师范大学学报(工程技术版),2011,11(02):034-38.
 Luo Jun,Ruan Cheng,Xu Yinlin.Adjustable Circuit of NC Half-Bridge PWM Output With Precise Reference Frequency[J].Journal of Nanjing Normal University(Engineering and Technology),2011,11(02):034-38.
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具有精确基准频率的数控半桥PWM输出调整电路
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南京师范大学学报(工程技术版)[ISSN:1006-6977/CN:61-1281/TN]

卷:
11卷
期数:
2011年02期
页码:
034-38
栏目:
出版日期:
2011-04-09

文章信息/Info

Title:
Adjustable Circuit of NC Half-Bridge PWM Output With Precise Reference Frequency
作者:
罗珺;阮程;徐寅林;
南京师范大学物理科学与技术学院,江苏南京210046
Author(s):
Luo JunRuan ChengXu Yinlin
School of Physical Science and Technology,Nanjing Normal University,Nanjing 210046,China
关键词:
DSPAD9833数控调整半桥变换电路
Keywords:
DSPAD9833digital controlledhalf-bridge circuit
分类号:
TH777
摘要:
在超声换能器电源电路中,为能使超声换能器以一定的振幅谐振,必须精确控制振荡电路的频率及功放电路的输出功率.设计了一种具有精确基准频率控制的数控半桥PWM输出调整电路,利用DSP芯片TMS320F2812控制AD9833产生精确的基准频率信号,并结合数控电位器X9312和555定时器,实现数控调整PWM波形的占空比,达到精确控制输出信号的频率、功率的目的.为了能够驱动乙类功率放大电路,还研究了一个半桥变换电路将单路PWM波形变换为两路互补的PWM波形.
Abstract:
An adjustable circuit of NC half-bridge PWM output with precise reference frequency is described in this paper, which is used to make sure that the ultrasonic transducer can work on the resonant point precisely in power amplifier circuit. The precise reference frequency is generated by AD9833. In order to control the output power exactly,X9312 and 555 timer are combined to adjust the duty cycle of PWM,and one PWM signal is transformed into two complementary waves to drive power amplifier circuit of ultrasonic transducer.

参考文献/References:

[1]李小雪,汪东,李平,等. 基于DDS 的超声换能器频率跟踪系统[J]. 压电与声光, 2009, 31( 5) : 692-693. Li Xiaoxue,Wang Dong,Li Ping,et al. Frequency tracing system for piezoelectric transducer based on DDS[J]. Piezoelectectrics and Acoustooptics,2009,31( 5) : 692-693. ( in Chinese)
[2]罗珺,阮程,徐寅林. 超声手术刀换能器的谐振频率特性研究[J]. 南京师大学报: 自然科学版, 2011, 34( 1) : 52-54. Luo Jun,Ruan Cheng,Xu Yinlin. Study on the characteristics of the resonant frequency of the ultrasonic scalpel transducer [J]. Journal of Nanjing Normal University: Natural Science Edition,2011, 34( 1) : 52-54. ( in Chinese)
[3]彭之威,薛雷,冯运亮. 基于DSP 和DDS 技术的EAS 扫频信号源设计[J]. 微计算机信息: 测控自动化, 2008, 24( 10 /1) : 242-244. Peng Zhiwei,Xue Lei,Feng Yunliang. Design of scanning signal source of EAS based on DSP and DDS[J]. Microcomputer Information: Measurement and Control,2008,24( 10 /1) : 242-244. ( in Chinese)
[4]王声钊,卢健康,高扬. 脉宽调制占空比门限电路设计[J]. 机械与电子, 2008( 2) : 46-48. Wang Shengzhao,Lu Jiankang,Gao Yang. A circuit design for the pulse width modulation duty cycle threshold[J]. Mechanical and Electronic,2008( 2) : 46-48. ( in Chinese)
[5]李莉,胡之惠. PWM 基带数字信号的产生与检测[J]. 上海师范大学学报: 自然科学版, 2002, 35( 3) : 31-36. Li Li,Hu Zhihui. The generation of PWM baseband digital signals and the demodulation[J]. Journal of Shanghai Normal University: Natural Science Edition,2002,35( 3) : 31-36. ( in Chinese)

相似文献/References:

[1]王峰,夏巍,王鸣,等.基于单片机和AD9833的信号发生器的设计[J].南京师范大学学报(工程技术版),2012,12(01):076.
 Wang Feng,Xia Wei,Wang Ming.Design of Signal Generator Based on MCU and AD9833[J].Journal of Nanjing Normal University(Engineering and Technology),2012,12(02):076.
[2]高路,王兴和,孙航嘉,等.波形产生与测频模块的应用设计[J].南京师范大学学报(工程技术版),2011,11(02):043.
 Gao Lu,Wang Xinghe,Sun Hangjia.Applied Design of Waveform Generating and Frequency Measurement Module[J].Journal of Nanjing Normal University(Engineering and Technology),2011,11(02):043.

备注/Memo

备注/Memo:
通讯联系人: 徐寅林,博士,教授,研究方向: 生物医学电子学. E-mail: xuyinlin@ njnu. edu. Cn
更新日期/Last Update: 2013-03-21