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variable-frequency

  • MATLAB-based program that generates plots of input power and shaft torque for variable-frequency op

    MATLAB-based program that generates plots of input power and shaft torque for variable-frequency operation of three-phase induction motors

    標(biāo)簽: variable-frequency MATLAB-based generates program

    上傳時間: 2017-04-22

    上傳用戶:ma1301115706

  • 風(fēng)力發(fā)電變頻器

    風(fēng)力發(fā)電變頻器_變頻器的英文譯名是VFD(variable-frequency Drive),這可能是現(xiàn)代科技由中文反向譯為英文的為數(shù)不多實例之一.

    標(biāo)簽: 風(fēng)力發(fā)電 變頻器

    上傳時間: 2013-10-30

    上傳用戶:ppeyou

  • Servomotors are available as AC or DC motors. Early servomotors were generally DC motors because the

    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.

    標(biāo)簽: motors Servomotors servomotors available

    上傳時間: 2014-08-10

    上傳用戶:源碼3

  • This paper analyzes the vector control theory of asynchronous motors based on the magnetic orientati

    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.

    標(biāo)簽: asynchronous orientati the analyzes

    上傳時間: 2013-12-08

    上傳用戶:shinesyh

  • 基于8098單片機(jī)的SPWM變頻調(diào)速系統(tǒng)

      數(shù)字控制的交流調(diào)速系統(tǒng)所選用的微處理器、功率器件及產(chǎn)生PWM波的方法是影響交流調(diào)速系統(tǒng)性能好壞的直接因素。在介紹了正弦脈寬調(diào)制(SPWM)技術(shù)的基礎(chǔ)上,設(shè)計了一種以8098單片機(jī)作為控制器,以智能功率模塊IPM為開關(guān)器件的變頻調(diào)速系統(tǒng)。通過軟件編程,產(chǎn)生正弦脈沖寬度調(diào)制波形來控制絕緣柵雙極晶體管的導(dǎo)通和關(guān)斷,從而達(dá)到控制異步電動機(jī)轉(zhuǎn)速的目的。實驗結(jié)果表明,該系統(tǒng)可調(diào)頻率調(diào)電壓,穩(wěn)定度高,調(diào)速范圍寬,具有較強(qiáng)的實用價值   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.  

    標(biāo)簽: 8098 SPWM 單片機(jī) 變頻調(diào)速系統(tǒng)

    上傳時間: 2013-11-14

    上傳用戶:ynwbosss

  • test RF module for 800MHZ frequency

    test RF module for 800MHZ frequency

    標(biāo)簽: frequency module test 800

    上傳時間: 2014-10-13

    上傳用戶:上善若水

  • Frequency Scale Conversion From f To f Scale frq2mel mel2frq mel The mel scale is based on the hu

    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.

    標(biāo)簽: Scale Conversion Frequency mel

    上傳時間: 2015-06-07

    上傳用戶:

  • Based on 80C196MC One-chip Computer Frequency Conversion Rapid System of Accent Design Program Listi

    Based on 80C196MC One-chip Computer Frequency Conversion Rapid System of Accent Design Program Listing

    標(biāo)簽: Conversion Frequency Computer One-chip

    上傳時間: 2015-06-11

    上傳用戶:我們的船長

  • For USB program, low pass filter for audio,Audio low-frequency Pass filter.

    For USB program, low pass filter for audio,Audio low-frequency Pass filter.

    標(biāo)簽: filter low-frequency program Audio

    上傳時間: 2014-01-16

    上傳用戶:zhichenglu

  • Channel estimation for OFDM systems based on comb-type pilot arrangement in frequency selective fadi

    Channel estimation for OFDM systems based on comb-type pilot arrangement in frequency selective fading channels 一篇信道估計的經(jīng)典文章

    標(biāo)簽: arrangement estimation comb-type frequency

    上傳時間: 2014-11-30

    上傳用戶:hzy5825468

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