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Description: sip commutator, sip commutator-sip, sip commutator
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Size: 20542816 |
Author: yeye |
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Description: sip commutator, sip commutator-sip, sip commutator
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Size: 20542464 |
Author: |
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Description: 本文提出一個根值4 蝴蝶元素使用(m, n) - 櫃臺減少硬體複雜, 延遲時間, 和電力消費被介入在使用常規加法器。並且一臺修改過的換向器為FFT 算法被描述與用管道運輸的實施一起為連續輸入資料減少資料記憶要求。-This paper presents a root element of the use of 4 Butterfly (m, n)- the counter to reduce the hardware complexity, latency, and power consumption has been involved in the use of conventional adder. And a modified commutator for the FFT algorithm has been described with the use of pipeline transportation for the implementation of continuous input data together with information to reduce memory requirements.
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Size: 3072 |
Author: 旻倫 |
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Description: 无刷直流电机无位置传感器控制技术的研究(博士论文)无刷直流电动机利用电子换相代替机械换相，不但具有直流电动机的调速性能，而且体积小、效率高，在许多领域已得到了广泛应用。采用无位置传感器控制技术之后，不但克服了外置式位置传感器的诸多弊病，而且进一步拓宽了无刷直流电机的应用领域。目前，无刷直流电机无位置传感器控制已成为无刷直流电机控制技术的发展方向。 本文纵观了无刷直流电动机的兴起、发展与现状，概括了无刷直流电动机无位置传感器控制技术的现有水平及存在的问题，以研制、开发全直流变转速空调产品为依托，从理论和实践两个方面对这些问题展开了较为全面的研究和讨论。 (1)针对反电动势过零点检测方法和换相点检测方法中存在的不足，分别提出了“延迟90°-α换相”和“超前60°-γ换相”的方法。同时，本文提出的软件、硬件相结合的换相原理突破了单纯依靠硬件电路换相的局限性，拓宽了系统的调速范围，提高了系统的稳定性和可靠性。 (2)本文详细阐述了无刷直流电机控制系统中的换相转矩脉动问题，分析了造成换相转矩脉动的原因，通过理论推导，创造性地给出抑制换相转矩脉动的方法，并利用计算机仿真手段及实验对这种换相转矩脉动抑制方法进行了验证。-R&D on Sensorless Control Technology for Brushless DC Motor Brushless DC motor with permanent magnet excitation, in which electrical commutator is used instead of mechanical, has the same good characteristics of speed control as traditional DC motor. Brushless DC motors have found wide application due to their high power density and ease of control. Moreover, the machines have high efficiency over wide speed range.
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Size: 4206592 |
Author: |
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Description: 直流发电机的工作原理就是把电枢线圈中感应的交变电动势，靠换向器配合电刷的换向作用，使之从电刷端引出时变为直流电动势的原理。-The working principle of DC generator armature coil is sensitive to the alternating electromotive force, by the commutator with brushes for the role, so that leads from the brush end into the DC when the force of the principle.
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Size: 48128 |
Author: wang junliang |
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Description: 具有梯形反电动势的永磁同步电动机通常被称为无刷直流电动机，它具有结构简单、体积小、重量轻、效率高、高功率密度、启动扭矩大、惯量小和响应快等其它种类直流电机无法比拟的特性。采用电子换向器替代了传统直流电动机的机械换向装置，从而克服了电刷和换向器所引起的噪声、火花、电磁干扰、寿命短等一系列弊病。-With a trapezoidal back-EMF permanent magnet synchronous motor is often referred to as brushless DC motor, it has a simple structure, small size, light weight, high efficiency, high power density, starting torque, inertia, and other types of fast response dc can not match the characteristics of the motor. Electronic commutator DC motor instead of the traditional mechanical reversing device, thereby overcoming the brushes and commutator caused by noise, sparks, electromagnetic interference, short life and a series of ills.
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Size: 186368 |
Author: 罗华 |
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Description: _中心Morrey空间上的Calderon_Zygmund算子的多线性交换子_-_ Center of Calderon_Zygmund Morrey spaces on the multi-linear operator commutator _
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Size: 687104 |
Author: chenzhanyi |
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Description: 多线性交换子-算法Multilinear commutator - Algorithm-Multilinear commutator- Algorithm
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Size: 686080 |
Author: chenzhanyi |
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Description: 书中详细叙述了各种交流电力托动自动控制系统的工作原理、实现方法、机械特性、运行特点及适用场合,其中包括调压调速、串级调速、变频调速、无换向器电动机调速和矢量变换控制的交流电动机调速系统,重点为变频调速系统。同时也介绍了新型电力电子器件及其控制和驱动电路,并介绍了各种典型变频器产品的技术性能和使用、维护方法。-The book detailed a variety of AC power drag the automatic control system works, method, mechanical properties, operating characteristics and application of occasions, including variable voltage control, cascade control, frequency control, no commutator AC motor speed control system, focusing on motor speed control and vector control for variable speed system. Also introduced new power electronic devices and their control and drive circuits, and all kinds of typical inverter technology performance and use, and maintenance methods.
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Size: 4052992 |
Author: yyy |
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Description: 无刷直流电动机利用电子换相代替机械换相，不但具有直流电动机的调速性能，而且体积小、效率高，在许多领域已得到了广泛应用。采用无位置传感器控制技术之后，不但克服了外置式位置传感器的诸多弊病，而且进一步拓宽了无刷直流电机的应用领域。目前，无刷直流电机无位置传感器控制已成为无刷直流电机控制技术的发展方向。 本文纵观了无刷直流电动机的兴起、发展与现状，概括了无刷直流电动机无位置传感器控制技术的现有水平及存在的问题，以研制、开发全直流变转速空调产品为依托，从理论和实践两个方面对这些问题展开了较为全面的研究和讨论。 (1)针对反电动势过零点检测方法和换相点检测方法中存在的不足，分别提出了“延迟90°-α换相”和“超前60°-γ换相”的方法。同时，本文提出的软件、硬件相结合的换相原理突破了单纯依靠硬件电路换相的局限性，拓宽了系统的调速范围，提高了系统的稳定性和可靠性。 (2)本文详细阐述了无刷直流电机控制系统中的换相转矩脉动问题，分析了造成换相转矩脉动的原因，通过理论推导，创造性地给出抑制换相转矩脉动的方法，并利用计算机仿真手段及实验对这种换相转矩脉动抑制方法进行了验证。-Brushless DC motor with permanent magnet excitation, in which electrical commutator is used instead of mechanical, has the same good characteristics of speed control as traditional DC motor. Brushless DC motors have found wide application due to their high power density and ease of control. Moreover, the machines have high efficiency over wide speed range.
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Size: 3854336 |
Author: wangfan |
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Description: 使用FPGA实现三相直流无刷电机换相，该程序可以使用-Use FPGA to realize the three-phase brushless DC motor commutation, the program can use
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Size: 89088 |
Author: 冰叶西 |
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Description: 本例用PIC单片机控制带感应器的直流无刷电机,通过调节RA0端口的可变电阻器可实现电机调速控制.由于当前版本PROTEUS不支持换向功能,连接RA1端口的SW1尚不能控制无刷电机的运行方向.(This example uses PIC MCU control with inductor DC brushless motor, the variable resistor adjusting RA0 port can realize the motor speed control. The current version of PROTEUS does not support the commutator, which is connected with the RA1 port SW1 still cannot control the running direction of the brushless motor.)
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Size: 65536 |
Author: 浪子单人影
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