Description: 步进电机运行系统控制设计,步进电机驱动原理是通过对它每相线圈中的电流的顺序切换使电机作步进式旋转，驱动电路有脉冲信号来控制，所以调解脉冲信号的频率变可以改变步进电机的转速，因此微电脑控制步进电机最合适。-Stepper motor to run system control design, the principle of stepper motor driver through every phase of its current coil in the sequence so that the electrical switch for step-by-step rotation, drive circuit has pulse signal to control, so mediation variable frequency pulse signal can be stepper motor to change speed, microcomputer control, therefore the most suitable stepper motor. Platform: |
Size: 4096 |
Author:erinandherry |
Hits:
Description: 变频驱动主要使用的驱动波形主要有SPWM和SVPWM两种。SPWM原理简单、实现容易,是现在使用最广的一种变频驱动波形。但其有一个致命的弱点是其电源利用率不高（只有86％）、谐波成分大。因此,在新近开发的产品中其应用逐渐被性能优异的SVPWM所取代。SVPWM是一种电压利用率、低谐波成分的变频驱动波形,还有开关次数少、功率管功耗小等特点。同时,SVPWM还能很好的结合矢量控制算法、以最大限度的发挥设备的性能。因此被越来越多的变频设备所采用。-The main use of variable frequency drive drive waveform SPWM and SVPWM are mainly two. SPWM principle of simple, easy, is now the most widely used as a variable frequency drive waveform. But there is a fatal weakness is its power utilization is not high (only 86), large harmonic components. Therefore, in the newly developed products in its application performance is gradually replaced by SVPWM. SVPWM is a voltage utilization, low-harmonic component waveform of variable frequency drive, there are fewer switches, power control features such as power consumption small. At the same time, SVPWM also a very good combination of vector control algorithm to maximize the performance of the play equipment. Therefore increasingly being used by the inverter equipment. Platform: |
Size: 174080 |
Author:wangwang |
Hits:
Description: 交直流调速系统与MATLAB仿真 书籍，PDF格式的，将交直流调速技术和MATLAB仿真技术有机结合在一起，主要内容包括直流调速系统及其仿真、直流调速系统的动态设计及其仿真、直流脉宽调速系统及其仿真、交流调压调速系统和串级调速系统及其仿真、交流异步电动机变频调速系统及其仿真、交流异步电动机矢量控制变频调速系统及其仿真、同步电动机调速系统及其仿真。-AC and DC speed control system with the MATLAB simulation of the book, PDF format, will be AC and DC speed control technology and the organic integration of MATLAB simulation technology together, the main features of DC drive system and its simulation, the dynamics of DC drive system design and simulation DC PWM system and its simulation, AC voltage regulation speed control system and cascade speed regulation system and its simulation, the exchange of asynchronous motor VVVF system and its simulation, the exchange of vector control induction motor variable frequency speed regulation system and its simulation, synchronous motor speed control system and its simulation. Platform: |
Size: 8657920 |
Author:吴易 |
Hits:
Description: 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. -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. Platform: |
Size: 995328 |
Author:徐永荣 |
Hits:
Description: 随着电力电子技术的发展，变频调速异步电机越来越广泛地应用在各种工业领域。而变频调速系统的使用也给电力电子与电气传动学科带来了新的活力和研究课题，本文从变频调速异步电机的设计出发，首先将传统异步电机的设计方法与变频调速异步电机的设计方法进行了比较。指出了传统异步电机设计方法在变频调速异步电机设计中存在的局限性。同时，本文详细而系统地分析了变频调速异步电机中时间谐波和空间谐波的产生机理，论述了时间谐波和空间谐波对异步电机运行性能的影响，以及对异步电机绝缘系统的损害。-Following with the development of power electronics technology, the inverter-driven induction motor is widely used in all kinds of industry field. The utility of variable frequency and adjustable speed systems brings a new research area and activity of power electronics and motor drive subject, this paper begins with the design of inverter-driven induction motor. Firstly, compare the design method of inverter-driven induction motor with that of conventional induction motor. And point out the limitations of design method of conventional induction motor which is used in the design of inverter-driven induction motor. At the same time, the generation mechanics of time and space harmonics in the inverter-driven induction motor is analyzed in details. The influences of both types of harmonics to the operation of induction motor are described, especially the harm to the insulation structure of induction motor. Platform: |
Size: 266240 |
Author:WMW |
Hits:
Description: 异步电动机变频调速系统matlab仿真，基于simulink仿真。-Induction motor variable frequency drive system matlab simulation, based on simulink simulation. Platform: |
Size: 5120 |
Author:Michael |
Hits:
Description: schematicof Variable Frequency Drive (VFD) Pump using TI F28023 MCU -schematicof Variable Frequency Drive (VFD) Pump using TI F28023 MCU
变频泵电路原理图，TMS320F28023DAT
Platform: |
Size: 160768 |
Author:刘迪 |
Hits:
Description: RTC的英文全称是Real-Time Clock,翻译过来是实时时钟芯片. RTC是PC主板上的晶振及相关电路组成的时钟电路的生成脉冲，RTC经过8254电路的变频产生一个频率较低一点的OS(系统)时钟TSC，系统时钟每一个cpu周期加一，每次系统时钟在系统初起时通过RTC初始化。8254本身工作也需要有自己的驱动时钟（PIT）。
-English name of the RTC Real-Time Clock, translated real-time clock chip RTC crystal and associated circuitry on the PC motherboard clock circuit to generate a pulse, the RTC after the 8254 circuit of variable frequency to produce a lower frequency of the OS(system) clock TSC, the system clock a cpu cycle plus one, each time the system clock in the system since the beginning of initialization through the RTC. The 8254 work also need to have their own drive clock (the PIT).
Platform: |
Size: 2048 |
Author:李柏林 |
Hits:
Description: 使用AVR单片机产生频率可调的PWM脉冲输出，两路脉冲互补，一路高电平，另一路低电平。可用于控制可变频率的驱动电机-AVR microcontroller to generate the PWM pulse output frequency is adjustable, two-way pulse complementary, all the way to high and low the other way. Can be used to control the variable frequency drive motor Platform: |
Size: 35840 |
Author:walton |
Hits:
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. Platform: |
Size: 4052992 |
Author:yyy |
Hits:
Description: 主要描述页岩气中压变频系统的电路，该系统主要是为压裂泵电机进行变频驱动。-It describes cicuit in the medium voltage system of shale gas ,It primarily for fracturing pump motor by variable frequency drive. Platform: |
Size: 10334208 |
Author:李军 |
Hits:
Description: Space Vector PWM
The space vector PWM (SVM) method is an advanced computation-intensive PWM method and is possibly the best method among the all PWM techniques for variable-frequency drive application. Because of its superior performance characteristics, it has been finding wide spread application in recent years.
Platform: |
Size: 4583424 |
Author:romi |
Hits:
Description: Experimental Results of Variable Frequency Drive for Three Phase Induction Motor Using Microcontroller Platform: |
Size: 777216 |
Author:Hade
|
Hits:
Description: AC motor drives are widely used to control the speed
of conveyor systems, blower speeds, pump speeds, machine tool
speeds, and other applications that require variable speed with
variable torque. The complete system consists of an ac voltage input
that is put through a diode bridge rectifier to produce a dc output
which across a shunt capacitor, this will, in turn, feed the PWM
inverter. Platform: |
Size: 475136 |
Author:hmod |
Hits:
Search - variable frequency drive