数字控制的交流调速系统所选用的微处理器、功率器件及产生PWM波的方法是影响交流调速系统性能好坏的直接因素。在介绍了正弦脉宽调制(SPWM)技术的基础上，设计了一种以8098单片机作为控制器，以智能功率模块IPM为开关器件的变频调速系统。通过软件编程，产生正弦脉冲宽度调制波形来控制绝缘栅双极晶体管的导通和关断，从而达到控制异步电动机转速的目的。实验结果表明，该系统可调频率调电压，稳定度高，调速范围宽，具有较强的实用价值 Abstract: AC variable speed with digital control systems used microprocessors， power devices and generate PWM wave is the direct factors of affecting the performance AC speed regulation system. On the basis of introducing the sinusoidal pulse width modulation (SPWM) technology，this paper designed variable speed system which used 8098 as a controller， intelligent power module IPM as switching device. Through software programming， resulting in sinusoidal pulse width modulation waveform to control the insulated gate bipolar transistor turn on and off， so as to achieve the purpose of speed control of Induction motors. Experimental results show that the system can adjust frequency modulation voltage， high stability， wide speed range， has a strong practical value.
上传时间： 2013-11-14
上传用户：ynwbosss
machine learning, accuracy estimation, cross-validation, bootstrap, ID3, decision trees, decision graphs, naive-bayes, decision tables, majority, Induction algorithms, classifiers, categorizers, general logic diagrams, instance-based algorithms, discretization, lazy learning, bagging, MineSet.
标签： decision cross-validation estimation bootstrap
上传时间： 2015-07-26
上传用户：赵云兴
micro chip的电机资料，主要是交流电机 AC Induction Motor Fundamentals
上传时间： 2016-10-27
上传用户：风之骄子
MATLAB-based program that generates plots of input power and shaft torque for variable-frequency operation of three-phase Induction motors
标签： variable-frequency MATLAB-based generates program
上传时间： 2017-04-22
上传用户：ma1301115706
Servomotors are available as AC or DC motors. Early servomotors were generally DC motors because the only type of control for large currents was through SCRs for many years. As transistors became capable of controlling larger currents and switching the large currents at higher frequencies, the AC servomotor became used more often. Early servomotors were specifically designed for servo amplifiers. Today a class of motors is designed for applica-tions that may use a servo amplifier or a variable-frequency controller, which means that a motor may be used in a servo system in one application, and used in a variable-frequency drive in another application. Some companies also call any closed-loop system that does not use a stepper motor a servo system, so it is possible for a simple AC Induction motor that is connected to a velocity controller to be called a servomotor.
标签： motors Servomotors servomotors available
上传时间： 2014-08-09
上传用户：源码3
1)LQG design of an unmanned helicopter 2) LQR control of an unmanned helicopter 3) speed torque characteristics of Induction machine
标签： helicopter unmanned control design
上传时间： 2017-05-28
上传用户：水中浮云
This reference design describes the design of a 3-phase AC Induction vector control drive with position encoder coupled to the motor shaft. It is based on Motorola’s DSP56F805 dedicated motor control device. AC Induction motors, which contain a cage, are very popular in variable speed drives. They are simple, rugged, inexpensive and available at all power ratings. Progress in the field of power electronics and microelectronics enables the application of Induction motors for high-performance drives, where traditionally only DC motors were applied. Thanks to sophisticated control methods, AC Induction drives offer the same control capabilities as high performance four-quadrant DC drives.
标签： Reference Designer Manual Phase DRM 023 AC
上传时间： 2020-06-09
上传用户：shancjb
本系统采用电动机电枢供电回路串接采样电阻的方式来实现对小型直流有刷电动机的转速测量。该系统主要由二阶低通滤波电路,小信号放大电路、单片机测量显示电路、开关稳压电源电路等组成。同时自制电机测速装置,用高频磁环作为载体,用线圈绕制磁环,利用电磁感应原理检测电机运行时的漏磁,将变化的磁场信号转化为磁环上的感应电流。用信号处理单元电路将微弱电信号转化为脉冲信号,送由单片机检测,从而达到准确测量电机的速度的要求。In this system, the sampling resistance of armature power supply circuit is connected in series to measure the speed of small DC brush motor. The system is mainly composed of second-order low-pass filter circuit, small signal amplifier circuit, single-chip measurement and display circuit, switching regulated power supply circuit and so on. At the same time, the self-made motor speed measuring device uses high frequency magnetic ring as the carrier, coil winding magnetic ring, and electromagnetic Induction principle to detect the leakage of magnetic field during the operation of the motor, which converts the changed magnetic field signal into the induced current on the magnetic ring. The weak electric signal is transformed into pulse signal by signal processing unit circuit, which is sent to single chip computer for detection, so as to meet the requirement of accurate measurement of motor speed.
标签： 直流电动机
上传时间： 2022-03-26
上传用户：hai7ying
近年来反季节种植已成火热趋势,温室大棚的普及十分迅速,而温室大棚对自动化、智能化的要求也越来越迫切,本系统将温室大棚的温湿度、二氧化碳浓度各个方面的检测,通风、浇灌、温度、喷洒农药等各个方面的控制进行综合系统研究,实现温室大棚对自动化、智能化的要求。这一系统是基于单片机控制的智能检测,控制系统包含单片机主控模块、感应检测模块、传感模块,显示、控制模块等[1]。从而提高温室大棚的种植效率,减少劳动力,提高利润等。In recent years,counter-season planting has become a hot trend featuring the rapid popularization of greenhouse and urgent requirement for the automation and intellectualization of greenhouse.This paper offers a comprehensive and systematic study of the monitoring of temperature,humidity and carbon dioxide concentration in the greenhouse and the control of ventilation,irrigation,temperature and pesticide spraying in order to achieve automation and intellectualization in greenhouse.This system is based on the intelligent detection controlled by single chip computer with the control system including the main control module,Induction detection module,sensing module,display and control module of single chip computer,which is effective in improving planting efficiency of greenhouse,reducing labor force and increasing profits.
上传时间： 2022-03-26
上传用户：lw125849842
说明： 电磁炉原理图和源程序。电磁炉源码 三星单片机S3F9454(Induction cooker schematic and source code. Samsung SCM S3F9454 Cooker Source)
上传时间： 2022-05-16
上传用户：ttalli
