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
风力发电变频器_变频器的英文译名是VFD（variable-frequency Drive），这可能是现代科技由中文反向译为英文的为数不多实例之一.
上传时间： 2013-10-29
上传用户：ppeyou
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
This paper analyzes the vector control theory of asynchronous motors based on the magnetic orientation of motor rotors, and its mathematical model is made. Then the variable frequency vector speed-adjusting experimental system is built with the DSP TMS320F2812 which works as the core control chip and intelligent power module.
标签： asynchronous orientati the analyzes
上传时间： 2013-12-08
上传用户：shinesyh
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
test RF module for 800MHZ frequency
上传时间： 2014-10-13
上传用户：上善若水
Frequency Scale Conversion From f To f Scale frq2mel mel2frq mel The mel scale is based on the human perception of sinewave pitch. frq2erb erb2frq erb The erb scale is based on the equivalent rectangular bandwidths of the human ear. frq2midi midi2frq midi The midi standard specifies a numbering of semitones with middle C being 60. They can use the normal equal tempered scale or else the pythagorean scale of just intonation. They will in addition output note names in a character format.
标签： Scale Conversion Frequency mel
上传时间： 2015-06-07
上传用户：kjl
Based on 80C196MC One-chip Computer Frequency Conversion Rapid System of Accent Design Program Listing
标签： Conversion Frequency Computer One-chip
上传时间： 2015-06-11
上传用户：我们的船长
For USB program, low pass filter for audio,Audio low-frequency Pass filter.
标签： filter low-frequency program Audio
上传时间： 2014-01-16
上传用户：zhichenglu
Channel estimation for OFDM systems based on comb-type pilot arrangement in frequency selective fading channels 一篇信道估计的经典文章
标签： arrangement estimation comb-type frequency
上传时间： 2014-11-30
上传用户：hzy5825468
