共查询到20条相似文献,搜索用时 15 毫秒
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This paper proposes a novel stepper motor controller based on field programable gate arrays, showing a remarkable performance. The system provides a combination between a novel algorithm and programmable logic to achieve both high speed and high precision on a compact hardware. 相似文献
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MC33991是Motorola公司生产的两相步进电机驱动器,可以准确地控制步进电机的运动并及时反馈步进电机的工作状态。该电路有良好的抗干扰能力,可以灵活地控制驱动步进电机,是汽车电子设备特别是汽车仪表中的理想驱动器。 相似文献
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Yongping Xia 《电子设计技术》2007,14(3):116-116
闲置的电话线引诱设计者把它的48V电位用作电源.但是,美国联邦通信委员会的电信规定第68章规定:连到电话线并且不使用于通信的任何设备的电阻都不得低于5MΩ(参考文献1). 相似文献
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新颖的串行控制步进电机驱动器 总被引:5,自引:0,他引:5
美国Allegro公司推出的A3972型串口控制器是步进电机微步距驱动专用电路。一个A3972外加一个简易CPU即可实现二相步进电机的32微步距驱动。文中介绍该电路的特点、引脚功能和工作原理.并给出A3972的典型应用电路,该电路已成功地应用在某步进电机伺服系统中。 相似文献
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内置功率驱动的A3980型步进电机控制器及其应用 总被引:1,自引:0,他引:1
A3980是Allegro公司推出的一款易操作、内置功率驱动的步进电机驱动器,利用该电路来控制步进电机具有低噪声、低功耗和高精度等优点.文中对A3980的主要特点、引脚功能及应用做了详细介绍. 相似文献
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宋博 《太赫兹科学与电子信息学报》2017,15(2):317-322
五相步进电机已被广泛应用于控制旋转角度、速度、位置和同步性的诸多领域。通过对新型五相步进电机工作原理的研究,采用Luminary公司LM3S615芯片设计完成步进电机的控制组件,由其内部自带的脉宽调制(PWM)模块产生驱动组件所需的接收时序信号,实现对驱动组件进行细分驱动。通过配置驱动组件,可以产生占空比不同的方波,从而在电机线圈内能够产生多种不同幅值的电流来实现细分驱动。选用的五相步进电机平台型号是SGSP(MS)20-85(X)。通过实验表明可以实现对步进电机的步进角、角位移量以及转动速度和加速度的精确控制。 相似文献
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针对步进电机控制中容易出现的问题,提出一种虚拟细分的方法,该方法既能够适应复杂的控制环境,又大大提高了控制精度.首先将电机的步进角平均分为Ⅳ(其值根据精度要求确定)个固定细分步,以该量作为基本计算单位,提出控制策略,即按照定周期变步长(转速慢时)和变周期定步长(转速快时)两种方式进行控制;其次,根据匀加速、匀速和匀减速三种运行状态,采用运动学公式建立了数学模型,计算当前载波周期的角位移和转速,并根据转速确定下一载波周期的大小,根据转子的当前位置确定是否换相,从而实现全过程的控制;最后,通过应用实例证明,该方法在工程实践中是可行的,完全能够获得满足精度的步进参数. 相似文献
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Rong-Jong Wai 《Industrial Electronics, IEEE Transactions on》2001,48(5):926-944
In this paper, the dynamic responses of a recurrent-fuzzy-neural-network (RFNN) sliding-mode-controlled permanent-magnet (PM) synchronous servo motor are described. First, a newly designed total sliding-mode control system, which is insensitive to uncertainties, including parameter variations and external disturbance in the whole control process, is introduced. The total sliding-mode control comprises the baseline model design and the curbing controller design. In the baseline model design, a computed torque controller is designed to cancel the nonlinearity of the nominal plant. In the curbing controller design, an additional controller is designed using a new sliding surface to ensure the sliding motion through the entire state trajectory. Therefore, in the total sliding-mode control system, the controlled system has a total sliding motion without a reaching phase. Then, to overcome the two main problems with sliding-mode control, i.e., the assumption of known uncertainty bounds and the chattering phenomena in the control effort, an RFNN sliding-mode control system is investigated to control the PM synchronous servo motor. In the RFNN sliding-mode control system, an RFNN bound observer is utilized to adjust the uncertainty bounds in real time. To guarantee the convergence of tracking error, analytical methods based on a discrete-type Lyapunov function are proposed to determine the varied learning rates of the RFNN. Simulated and experimental results due to periodic step and sinusoidal commands show that the dynamic behaviors of the proposed control systems are robust with regard to uncertainties 相似文献
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步进电机的远程多点位置控制系统,利用TCP协议将服务器端控制中心和客户端控制器接入因特网,可实现控制数据和位置监控数据的远程同步传输。系统采用NI公司的CompactRIO作为核心控制器;通过LabVIEW编写改进专家PID控制算法,可根据设定位置与实时位置的偏差动态设定输出控制器参数,有效防止过冲现象,实现步进电机的精确位置控制。步进电机的驱动控制电路由单片机和LM298构成,结合多级细分控制方法可有效抑制步进电机的震动和失步。 相似文献
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本设计应用单片机、步进电机驱动芯片、LED显示和键盘阵列,构建了集步进电机控制器和驱动器于一体的步进电机控制系统。讨论了一种步进电机变频调速的方法。本控制系统的开发采用了软硬件协同仿真的方法,有效地减少系统开发的周期和成本。 相似文献
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We present a new low-complexity algorithm for controlling a stepper motor to rotate with constant acceleration or deceleration. It can be operated on a basic low-end microcontroller and does not require any data tables. Also, it does not have the limitation of the motor having to start from standstill. The algorithm was tested using a small robot programmed to move and change acceleration ‘on the run’. The theoretical foundations for further improving the timing accuracy of the algorithm were also derived. 相似文献
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Kinematic design and commutation of a spherical stepper motor 总被引:9,自引:0,他引:9
This paper addresses the design and commutation of a novel kind of spherical stepper motor in which the poles of the stator are electromagnets and the poles of the rotor (rotating ball) are permanent magnets. Due to the fact that points on a sphere can only be arranged with equal spacing in a limited number of cases (corresponding to the Platonic solids), design of spherical stepper motors with fine rotational increments is fundamentally geometrical in nature. We address this problem and the related problem of how rotor and stator poles should be arranged in order to interact to cause motion. The resulting design has a much wider range of unhindered motion than other spherical stepper motor designs in the literature. We also address the problem of commutation, i.e., we determine the sequence of stator polarities in time that approximate a desired spherical motion 相似文献