基于DSP LF2407A的啮合式微型电机控制驱动器

啮合式微型电机是一种新型电机,作为一种与磁阻电机类似的电机,其控制驱动需要专门的控制驱动器实现。文中介绍了一种基于DSP2407的适合于啮合式微型电机的控制驱动器,利用该控制驱动器实现了啮合式微型电机的斩波恒流驱动、细分驱动控制。     

三相混合式步进电机驱动器设计

为了提高三相混合式步进电机低频运行的稳定性、降低系统噪声和振动,设计了采用功率器件和细分技术的驱动器。通过合理选择步进电机相绕组细分电流波形,增加步进电机运行的平稳性,具体的分析了控制电路的设计:电流指令发生器、电流闭环控制器以及故障保护电路。     

基于TC1002的两相混合式步进电机细分驱动器设计

以一款两相步进电机控制芯片TC1002,实现了一种结构简单的高性能、多细分、微型化两相混合式步进电动机驱动器。该系统采用恒流斩波控制方式,可调的电流衰减模式可以进一步改善步进电机绕组的电流波形。驱动器最高细分数为256,提供正反向控制、使能控制、自动半流锁定功能以及过流、过热等电动机驱动器的保护功能。这种控制器成本低、容易实现、性能稳定,是步进电机控制器的一种较好选择。     

超磁致伸缩驱动器双向可控恒流驱动电源的研究

针对超磁致伸缩驱动器的工作原理和电源驱动特点,设计了一种基于DSP控制能实现电流-4 A～+4 A连续可调的双向可控恒流驱动电源.该电源经实际测试性能良好,能满足超磁致伸缩驱动器的工作要求.     

基于DSP的三相混合式步进电机脉冲细分驱动系统

采用数字信号处理器DSP作为控制器,实现细分角度和电流的实时运算;利用其片内集成的事件管理模块通过软件实现脉宽调制.实验证明,此驱动系统简化了电路,提高了系统控制性能,实现步进电机步距角的高精度、连续细分驱动.     

二相步进电动机细分驱动控制系统分析

二相步进电动机由于固有的振动和噪音,限制了其在工业领域的应用,本文分析了细分驱动器在减小振动和噪音方面的原理和特点,介绍了细分驱动器的原理,同时对细分驱动器在实际应用中的特性作了评价.     

基于DSP的精密平面电机伺服驱动设计

提出了一种基于DSP的精密直流伺服驱动器设计方案,采用基于PI2算法的电流负反馈,及电流输出零点自校正算法等控制策略,应用于平面电机的超精密运动控制.给出了伺服驱动器结构及控制环路,分析了引起伺服驱动输出误差的不利因素,并提出了针对噪声、模数转换误差、模拟信号漂移等误差因素的处理方法.试验结果表明:采用此驱动方案的平面电机能建立精确的控制模型,达到纳米级的定位精度.     

二相步进电动机细分驱动控制系统分析

二相步进电动机用于固有的振动和噪音,限制了其在工业领域的应用,本文分析了细分驱动器在减小振动和噪音方面的原理和特点,介绍了细分驱动器的原理,同时对 驱动器在实际应用中的特性作了评价。     

基于DSP的三相混合式步进电机的SVPWM控制

提出了基于DSP的三相混合式步进电机电压空间矢量SVPWM控制方法。通过对三相步进电机旋转磁场的空间电流矢量合成以及Clarke、Park变换,使绕组中电流在细分控制下得到了较好的电流正弦波形,实现恒转矩控制。实验结果表明,SVPWM控制系统极大的降低了步进电机低频振荡现象,改善了高速运行时的力矩特性。     

一种新型步进电机驱动器

该文设计了一种新型的步进电机驱动器。该驱动器用于驱动三相反应式步进电机。低速运转时采用细分控制,低频振荡小;高速运转时不采用细分控制,电机动态响应快、加速特性好。该驱动器适合与普通单片机控制器配套使用。     

磁流变阻尼器的电流驱动器的设计与测试

动态响应时间是磁流变阻尼器的一个重要指标，它与驱动电路的形式密切相关。相对于电压源驱动，电流源驱动能显著缩短磁流变阻尼器线圈中励磁电流的瞬态响应过程。本文采用PWM开关方式设计了一种用于汽车磁流变阻尼器的电流驱动器，并连接实际磁流变阻上升响应时间约为3．10ms，阶跃下降响应时间约为13．20ms。     

An ultrahigh stability, low-noise laser current driver with digital control

We present a low-noise, high modulation-bandwidth design for a laser current driver with excellent long-term stability. The driver improves upon the commonly used Hall-Libbrecht design. The current driver can be operated remotely by way of a microprocessing unit, which controls the current set point digitally. This allows precise repeatability and improved accuracy and stability. It also allows the driver to be placed near the laser for reduced noise and for lower phase lag when using the modulation input. We present the theory of operation for our driver in detail, and give a thorough characterization of its stability, noise, set-point accuracy and repeatability, temperature dependence, transient response, and modulation bandwidth.     

A new switched-capacitor frequency modulated driver for light emitting diodes

A new type of drivers for light emitting diodes (LEDs) is introduced based on the switched-capacitor frequency modulation. In contrast to conventional constant dc current drivers, the current pulse is provided by this new switched-capacitor LED driver. In the present driver, the charging capacitor is charged and discharged through a LED and the current flow direction is controlled by a metal oxide semiconductor switch. The input current (and thus the LED brightness) is proportional to the switch clock frequency at relatively low frequencies and becomes saturated at relatively high frequencies. This new driver circuit is simple and robust and maintains high efficiency for a wide range of input powers. In addition, the dimming control is easily realized by modulating clock frequency. Finally, this LED driver consumes no dc current and thus provides inherent protection to LED in standby mode.     

激光二极管群并联驱动电源的研制

介绍一种单片机控制的激光二极管群并联驱动电源，系统包括可调恒流源、过流保护电路、光功率采样与放大电路等部分，结合硬件及软件，实现了激光二极管群的可靠保护与光功率的稳定、准确输出，并且使这若干个激光管互不影响。     

磁流变阻尼器PWM快速控制

提出了磁流变阻尼器的PWM快速控制方法，研制出了用于汽车磁流变阻尼器的电流驱动器，经实验测试，该驱动器响应速度快，输出电流可在0．1－5A范围内调节，相对误差不大于2．67％，非线性误差不大2．18％。     

A switched supply tunable red-green-blue light emitting diode driver

This paper presents a new switched supply tunable red-green-blue (RGB) light emitting diode (LED) driver. The RGB LEDs act not only as light emitting devices but also as rectifying diodes in the presented driver circuit. The RGB LED color control is realized by controlling the switched supply voltage amplitude, frequency, and duty cycle. The driver efficiency is high since the only loss in the driver circuit is the switch and can be further reduced by direct alternate current supply.     

电动汽车用直流无刷轮毂电机驱动器的保护措施

为直流无刷轮毂电机驱动器设计了包括过电流保护、过电压保护和温度保护在内的完善的保护措施.同时提供了一种简单实用的电流闭环控制的硬件实现方法.所设计的电路都已用于电机驱动器的研制,并取得了较好的效果.     

Note: updates to an ultra-low noise laser current driver

We describe updates to our current driver design allowing for higher output currents, both positive and negative currents, and updated digital interfacing to the microcontroller. We also discuss measurement of the noise spectral density of the driver with a better technique, showing that the driver's actual current noise density is about an order of magnitude lower than the upper limit we previously determined.     

Characterisation of optimal human driver model and stability of a tractor-semitrailer vehicle system with time delay

In this paper, a vehicle/driver close-loop system is studied in order to characterise the inherent model parameters of an optimal human controller for a regulation task (e.g. stabilisation after a wind gust) in articulated vehicle motions. The tractor-semitrailer vehicle model consists of two articulated rigid bodies moving on a horizontal plane with a constant forward speed. The driver establishes his steering control through a time-delayed feedback from current vehicle states with respect to the desired motion. Identification of driver model parameters is achieved through an optimal control approach. The stability of the delayed dynamical system is also studied using a numerical method by computing the eigenvalues near the imaginary axis.     

基于3955的步进电机驱动器设计

本文介绍了步进电机驱动芯片3955的功能特性,并根据其特性,设计出了可运行于整步、二分之一步、四分之一步、八分之一步方式的驱动器。在整步和二分之一步方式下,此驱动器还可在电机静止的时候选择将电机绕组电流减小。