数控机床高速电主轴技术及应用

一、高速电主轴的发展历程早在20世纪50年代,就己出现了用于磨削小孔的高频电主轴,当时的变频器采用的是真空电子管,虽然转速高,但传递的功率小,转矩也小。随着高速切削发展的需要和功率电子器件、微电子器件和计算机技术的发展，产生了全固态元件的变频器和矢量控制驱动器；加上混合陶瓷球轴承的出现，使得在20世纪80年代末、     

高速电机中频变频器的电路设计

中频变频器用于内圆磨床高速磨头电机的驱动。该中频变频器是一种直流电压斩波控制型变频装置,调压和调频两个环节同时受控于主令电压,实现U/f通调,两者在控制上配合较好。变频器启动电路中采用函数信号发生器,在PWM脉冲列产生电路中采用了V/f转换电路,f/V转换电路和频率PI调节器电路等,在PWM信号形成电路中使用了六分频环计及双对偶与/或选择门电路,设计成150°导通型的方波逆变器。该中频变频器已在轴承行业的磨床中大量应用。     

ZSK_(xyz)-2高速数控钻床用的微机变频器

有许多工作母机必须工作在30000r/min(500Hz)以上的高速转速下,如高速台钻、精密内圆磨床的磨头、高速摄影机等。以前驱动这类电机都采用一组笨重的中频电机组供电,这种中频电机组造价高,维护难,体积和噪声都较大。近年来,交流     

ZSKxyz—2高速数控钻床用电主轴驱动器

本文介绍了ZSKxyz-2两轴三坐标高速数控钻床用电主轴驱动器的组成,设计和工作原理。该驱动器是一种GTR逆变器供电的高速异步机变频调速系统,其特点:(1)采用PWM控制:(2)全部控制规律由8031单片机完成;(3)采用软起动、软降速;(4)具有传输延时短及高效的GTR驱动电路和过流、过压保护电路。高速钻床电主轴采用本文研制的驱动器,克服了以往所用中频电机组体积大、成本高、效率低、噪音大及维修难的缺点。     

台达高速变频器有效驱动高速电动机

正高速电动机需要变频器输出很高的频率才能达到转速的要求,目前市场上变频器是无法驱动高速电动机的,需要通过修改软件,同时把变频器选型放大至少三挡以上勉强可以驱动。台达自主创新开发出针对高速电动机驱动的高速变频器C2000-HS系列,采用融合台达集成技术的新一     

高速电主轴的关键技术及发展趋势

随着高速机床的飞速发展,高速电主轴已成为决定高端数控机床发展的关键技术之一。论文分析了国内外高速电主轴的研究现状,阐述了研制高速电主轴的轴承、主轴电机及控制、润滑及冷却等关键技术。并对高速电主轴的发展方向给出了预测性分析。     

微机控制全数字化SPWM变频器的研制

本文介绍了海林轴承厂自行开发研制的变频器，适用于轴承磨床电主轴及其它中频电机的小型电源。输出电压为正弦脉宽调制，输出电流为准正弦波，输出频率０～１５００赫兹。控制电路采用西门子的ＳＬＥ４５２０专用芯片与单片机ＭＣＳ—５１相结合产生ＳＰＷＭ信号，并实现数字化控制；逆变元件采用开关频率较高的ＩＧＢＴ功率模块。     

10kW高速永磁同步电主轴驱动控制系统设计

介绍了一种10k W高速永磁同步电主轴驱动控制系统。系统采用背靠背双向PWM拓扑结构,DSP+CPLD为核心控制单元,通过无位置传感器检测技术和矢量控制算法驱动控制高速主轴电机,具有良好的动静态速度调节性能。系统包括主电路、控制单元、采样电路、驱动电路、监控和接口电路、保护电路等。详细介绍了硬件设计的思路和技术参数,制作了试验样机,并搭建了高速试验台,对样机进行了试验验证,试验结果证明了本系统良好的动静态性能。     

高速电主轴电气设计及优化

介绍高速电主轴电气特性和其设计的流程,阐述了对各电主轴关键参数的设计原则。为电主轴优化设计提供重要依据。     

高速电主轴中实心转子和鼠笼型转子的比较

60000转/分和更高转速的高速电主轴在油泵油嘴及微型轴承行业中得到广泛的应用。一、两种转子结构高速电主轴的转子可以做成实心转子,也可以做成笼型转子。 1.实心转子实心转子是指主轴电动机的转子由整块钢制作,在高速电主轴中它与转轴更是合为     

SRM inverter topologies: a comparative evaluation

Several inverter power circuits suitable for switched reluctance motor (SRM) drives are analyzed and compared. Five inverter circuits are considered with the objective of establishing the most appropriate topology for an SRM drive. The comparison is based on the peak voltage and peak current ratings of the DC link components. Because the power converter choice depends on the motor design, the converter analysis and selection are done for a high-speed, 6/2 SRM suitable for a spindle drive and a high-torque 8/6 motor. Experimental results obtained for a high-torque drive are included     

How to choose frequency converters intended for electric drives operating with constant torque

The problems of how to choose a frequency converter for an electric drive operating with constant torque and with frequent start-up are examined. A mathematical model permitting us to estimate power inputs in the frequency converter is suggested.     

变频高速电机驱动压缩机在西气东输的运用

介绍了西门子LCI变频器及高速电机驱动压缩机系统在西气东输的应用.主要作用是用变频电机驱动压缩机,为长输天然气管线增压.经应用表明,该系统节能降耗、工作可靠、操作方便.通过对驱动系统的构成、主要特点的阐述及工程建设、运行中易出现问题的分析总结,为该类系统在今后相似项目上的运用提供了经验借鉴.     

Improving the reliability of electric drives of exhausters of the oxygen-converter process

This paper deals with increasing the reliability of electric drives of exhausters of the oxygen-converter process. The dependences of the reliability parameters in the electrical converter–electric motor system on the power reserve were obtained. The costs for the installed equipment were taken as an optimization criterion. It is noted that improving the reliability of an electric drive is possible both by increasing the overall power of the power unit and by changing the number of phases. It is shown that the reliability of the system can be improved in a synchronous electric drive with pulse-vector control at the reservation of a semiconductor converter. A mathematical model of the electrical converter–reluctance motor with a field-regulated machine complex is proposed. The results of the mathematical modeling of the synchronous electric drive with pulse-vector control are considered. The dependence of the specific electric parameters on the number of phases is determined.     

新型循环变频器

本文介绍了一种新型循环变频器,该变频器以时空多相变频、空分输出为理论,从而实现循环变频、移相调压的目的。相对于目前较为广泛使用的静止式循环变频器,能较简单灵活地控制电机实现四象限运行,在电气传动、自动控制等领域有着广阔的发展前景。     

适合于混合动力汽车新型双向DC/DC变换器研究

首先介绍了一种混合动力汽车的基本电路,然后根据要求设计了一种双向变换器,它具有高功率传输能力和最小开关应力,适合于连接超级电容器来驱动混合动力汽车.与一些典型的隔离式双向DC/DC变换器相比,该变换器具有较低的设备应力,并且可通过相移加PWM控制,采用隔离变压器的漏感作为能量传输单元和控制变量.最后,实验波形证明该变换...     

三菱PLC和变频器在磨簧机上的应用

近年来,国内外不少厂家把先进的可编程序控制器技术应用于磨簧机的电气控制,把人机界面、操作按钮、变频器等通过可编程序控制器来控制磨簧机的动作。本项目电控技术平台选用日本三菱电机FX3U系列PLC和变频器实现控制与驱动系统。     

A high-speed vector-controlled spindle motor drive with closedtransition between with encoder control and without encoder control

A 40000-r/min vector-controlled induction motor drive is introduced. The vector control of induction motors has been widely accepted in spindle drives of machine tools where they replace conventional DC motors because of the low maintenance requirements. Another important feature of the AC spindle drive is its high-speed capability. The magnetic encoder is most widely used as the speed detector because it is suited for use in an adverse environment. However, the magnetic encoder with high resolution and a high S/N ratio loses the output pulses at extremely high speed. In the drive system introduced, the conventional vector control is used in the low-speed range, and the vector control without the encoder is used in the high-speed range. Close transition between two modes is made without interrupting the operation     

RFNN controlled sensorless induction spindle motor drive

A sensorless induction spindle motor drive using synchronous PWM (SPWM) and dead-time compensator with recurrent fuzzy-neural network (RFNN) speed controller is proposed in this study for advanced spindle motor applications. First, the operating principles of a new type SPWM technique and the circuit of dead-time compensator using field-programmable gate arrays (FPGA) are described. Then, a speed observer based on a modified Luenberger observer is adopted to estimate the rotor speed. Moreover, since the control characteristics and motor parameters for a high-speed induction spindle motor drive are time-varying, an RFNN speed controller is developed to reduce the influence of parameter uncertainties and external disturbances. In addition, the RFNN is trained on-line using a delta adaptation law. Finally, the performance of the proposed sensorless induction spindle motor drive system is demonstrated using some simulated and experimental results.     

变频驱动专用异步电动机的技术分析

随着变频技术的深入发展,用于变频器驱动的电动机也在朝着变频器驱动专用电动机方向变化。介绍用于变频器驱动的中等容量新型异步电动机的技术参数和规格,对其结构、性能进行了分析,并与一般异步电动机作了比较。