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2
说明： 在传统矩阵变换器和多电平逆变器的基础上,提出一种新颖的多电平矩阵变换器,介绍了其拓扑结构和工
作原理.多电平矩阵变换器的能量传递,是通过三相输入电压对中点电容充电到一个恒定直流电压而实现的.选择适
当的控制算法和电容电压,能在变换器的两侧合成低次谐波含量小且波形近似于正弦的可控输入/输出电压.对多电
平矩阵变换器进行建模和仿真,并探讨了其输出能控性.
( On the basis of a conventional matrix converter and a multilevel inverter, a novel multilevel matrix
converter is proposed, and its topology configuration and principle are introduced. This converter operates as a
bidirectional converter and transfers energy between its two sides by charging the midpoint capacitors to a known
constant DC voltage level. Proper selection of control algorithms and capacitor voltages helps synthesize controllable
and waveforms almost sinusoidal three-phases AC voltage with minimum low-order harmonics at both sides of the
converter. The multilevel matrix converter is modeled and simulated with its output controllability discussed.
)
- 2012-03-25 19:01:33下载
- 积分：1
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sd_card_test
基于飞思卡尔的k60开发板，用于测试sd卡读写，测试程序是在MQX系统下编写的应用软件。(Development board based on Freescale' s k60, sd card reader for testing, test procedures are written in the MQX system application software.)
- 2013-08-05 22:11:58下载
- 积分：1
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按键识别
单片机按键识别，用于实现不同的键盘输入的识别与后续操作。(The single-chip button recognition is used to realize the recognition and subsequent operation of different keyboard inputs.)
- 2019-06-19 19:47:09下载
- 积分：1
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飞驰人生
使用了成品遥控车的遥控与接受模块，基于STC89C52RC,模拟PWM输出控制车速，五个前进挡，两个倒挡(The remote control and acceptance module of the finished remote control vehicle is used. Based on STC89C52RC, the output of PWM is simulated to control the speed of the vehicle. There are five forward gears and two reverse gears.)
- 2020-06-18 10:00:01下载
- 积分：1
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Horizontal-dip-XYZ-detector
基于STC89C51RC的水平倾角XYZ检测仪(Horizontal dip XYZ detector STC89C51RC)
- 2016-01-31 01:55:10下载
- 积分：1
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C8051F30X-software-SPI-example
说明： 此应用笔记收集了用软件实现的主模式SPI程序。提供了8 个不同的SPI 主模式传输例。示例中包含SPI时钟相位和极性两个子例程：一个是用C 语言编写的例程，一个是为了提高速度用汇编语言编写的可被C 语言调用的例程。一个例子是在“C”程序中如何调用汇编同时提供了EEPROM接口例子。SPI是摩托罗拉商标。
此文档中描述的SPI功能使SPI处理的软件
最小化。在系统中使用C8051F30X 器件作为
总线上的SPI 主器件。(This application note collection implemented in software SPI master mode procedures. Provides 8 different SPI master mode transfer cases. Examples include SPI clock phase and polarity of the two sub-routines: one is written in C language routines, one is to increase the speed of assembly language written in C language can be called routine. One example is in the " C" programs how to call assembly also provides examples of EEPROM Interface. SPI is a Motorola trademark. SPI described in this document processing software capabilities to minimize the SPI. In the system C8051F30X SPI device as the primary device on the bus.)
- 2011-02-23 11:14:23下载
- 积分：1
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SAutoFocus01C
单片机SCM处理信号的自动聚焦系统，利用单片机SCMM控制光学镜头，实现自动聚焦功能，
(MCU SCM processing a signal automatic focusing system, the use of the microcontroller the SCMM to control the optical lens, to achieve auto-focus function,)
- 2012-08-25 17:48:26下载
- 积分：1
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lab7-LCD
dab单环控制，基于输出电压闭环和DSP28335，以及显示器(single closed loop controller of DAB)
- 2019-07-10 12:55:45下载
- 积分：1
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COM
Source code demo rs232
- 2013-08-21 09:19:31下载
- 积分：1
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shuanglushuzihecheng
摘要
电能表作为用电量的测量工具广泛的应用于各种场合。在电能表校表系统中,需要的最基本的输入信号源是高精度双路正弦信号源,并要求可对其频率、相位、幅值进行调节,来对电能表进行校准。
基于单片机的程控信号源设计，运用数字调相、数字调幅和数字调频等技术，要求实现相位、幅度、频率的高精度程控调节。本文设计了一种利用锁相环频率合成技术和数字波形合成技术组成的程控低频正弦波信号发生器，并给出了调幅、调频、调相的实用电路，频率调节通过改变8253计数器的分频系数来实现；相位调节由51单片机预置计数器的计数初值来完成，幅度的调整通过改变DAC1210II的参考电压来实现，使频率分辨率达0.01Hz,相位调节精度达0.1°，并介绍电路中的主要芯的功能及使用。输出正弦波频率和幅值的精度高，稳定性好，失真度低，电路简单、可靠、便于程控。
关键词：数字合成信号源；程控；调幅；调频；移相；
(Abstract
Meter consumption as the size of the measurement tool is widely used in various occasions. In single-phase power meter verify system, the most basic needs of the input signal is the source of two-way high-precision sine signal source, and may request its frequency, phase, amplitude in a certain step to adjust to the imitate of the actual electricity load with a right meter calibration.
Design of the programmable signal supply controlled source，which based on the MCU，including digital phase adjustment，distal amplitude adjustment，digital frequency adjustment etc．The system should achieve high quality digital adjustment of phase, amplitude and frequency. This paper describes the use of a PLL frequency synthesizer technology, and digital wave form synthesis technology consisting of program-controlled low-frequency sine wave signal issued devices, and applies the amplitude， frequency， phase of practical circuit. Frequency can be adjusted through a change in the 8253 counter-frequ)
- 2021-04-08 20:19:00下载
- 积分：1
