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57 Stepper Servo Motor

57 Stepper Servo Motor

Each technology has its niche, and since the selection of either of these technologies for a given application affects its chance of success

1.产品介绍

Stepper Motor or Servo Motor; Which Should it be?

Each technology has its niche, and since the selection of either of these technologies for a given application affects its chance of success, it is important for the machine designer to select the best motor-drive system for the application, while considering the technical advantages and disadvantages of both.

It is all about utilizing these technologies with balance to achieve the desired process performance for a given machine design while balancing cost versus the capability of the required mechanism.

机器设计人员不应通过预定的Measpset或舒适度限制母步或伺服电池的利用,但是学习每个技术最适合控制要执行的特定机制和过程的工作。


2.产品参数。

57CSM stepper servo motor


1


3. Product qualification:

6(001)

4(001)


4. Deliver, shipping and serving:

0

9


5. FAQ:

步进电机系统概述

步进电机与伺服系统有几个主要优点。它们通常是较低的成本,具有共同的NEMA安装,提供更低的扭矩选项,需要更昂贵的布线,并且它们的开环运动控制部件使机器集成简单,为最终用户提供易用性。

Torque and Speed Considerations

The issue of whether to use a stepper or servo is dictated by the application in most cases. Steppers are typically sized for twice their continuous requirements for additional acceleration and/or deceleration torque capability or for a required peak torque.

相反,伺服电动机通常用于特定的应用速度和扭矩,用于最大间歇加速/减速,保持扭矩(如果适用),以及通过完整的运动轮廓的连续RMS要求。

In general, if an application requires high-throughput, high-speed, and high-bandwidth capability for disturbance correction, and/or high-rpm, with or without tight coordination between axes, servo motors are the best option. If point-to-point position performance and rpm requirements are modest, (as a function of the process loads and expected disturbances) steppers may be a better choice. Additionally, when the loads are within reason, a stepper’s ability to hold position (using holding torque with power and detent torque without power) can be an advantage.

速度扭矩曲线突出了平台和AC永磁体(PM)伺服电机的差异等体积的差异。步进者通常以比伺服电机的较低速度产生更高的连续扭矩。然而,伺服电动机在相同的低速范围内产生间歇峰扭矩,并在更高的速度范围内产生峰值和连续扭矩。

用于调整和设置的自动化机器轴以及用于检查的视频轴,是步进系统符合良好的应用。步进者特别适用于这些轴,因为它们往往更容易设计到控制系统中,并且在初始设置时便宜。当给定设置的轴可以锁定到适当位置时,它们的操作更便宜(例如,可选的开/关降低功率模式)。另外,在适当的应用时,由于其简单的开环控制,避压器不太容易发生故障,这只需要闭环的反馈电路需要绕组到驱动的匹配与电动机到机构调整。系统。

步进驱动器

更新的设计技术通过利用:内置反馈,移动末端阻尼(用于最大化准确度的同时降低的沉降时间),软启动(用于减少加电时),防谐振,反共振(用于减少沉降时间),反谐振(用于减少稳定时间),反谐振(用于减少搅拌时间),防谐振(用于减少沉降时间),防振(用于减少稳定性),防谐振模式(用于优化扭矩,稳定性和降噪和噪音或其他方式),空闲电流减少(IRC - 用于降低的电机加热期间,在静止期间减少),并且在全步骤,半步和微步之间易于控制的操作模式。

Although most properly sized steppers are extremely accurate running open loop in the selected step mode, built-in feedback provides additional precision without the cost of an external feedback device. Microstepping techniques result in smoother torque and motion at low speeds and greater resolution at high speeds with the reduction of step size from full-step/half-step.

Modern Stepper Developments

Modern steppers are available in larger power ratings than earlier generation steppers. Newer design techniques have led to smaller airgaps, stronger magnets, physically larger magnets and rotor oversizing. Increasing the rotor’s diameter generates more torque per unit volume. For this technique, the physical frame size and winding of the step motor stays the same while the rotor’s diameter and inertia are increased. Of course, the larger rotor inertia can affect acceleration and deceleration times for a given application; but this method opens up more applications to a given stepper frame size by the effective decreased ratio of the load (J_load) to motor rotor (Jm) inertia. Generally, step motor systems are sized with a J_load : Jm of less than 30:1, but with slower accelerations and decelerations and advanced microstepping operation, inertia ratios of 200:1 are achievable.

With Stall Detection now being handled electronically within today’s modern stepper drives, optional feedback devices are typically utilized for position correction due to component misalignment, noise, and/or lost pulse (position) information. A step motor with feedback, depending on the stepper drive, will have less velocity ripple and use less power than open-loop equivalents and will have higher residual torque at low speeds than an equivalent three-phase servo motor. Thus, the designer must use discernment in regard to the work to be performed because step motor applications requiring feedback can approach the cost of a servo system and what may be an operational advantage in one application may be a disadvantage in another. Closed-loop stepper systems do not technically compete well against the lower priced servo motor system; so the pros and cons of both type systems should be carefully considered for the application.

Servo Motor System Overview

伺服电机与秋天者有几个不同的优势。它们可以在宽速度范围内产生高扭矩,可在更宽的扭矩范围和更高的电压(最多480 VAC)中获得。它们响应扭矩的干扰远远大于它们的连续能力,仅使用所需的功率来实现指挥的运动并紧凑。

伺服驱动器

电动驱动补偿通常被称为调谐或COMP,一旦考虑伺服用户的BANE过程,历史就是历史。如今,最新的数字伺服驱动技术具有增强的软件和硬件功能,可改善用户体验,并提供显着的补偿灵活性。实际上,一些伺服系统自动配置电机,驱动器和反馈,并调整自己。伺服驱动器调谐自动自动适应给定的电动驱动机构,而不会降低性能,并且很少需要进一步调整控制回路。


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    添加:十七大杨。路,Yulv Communicty, 29岁ng Subdistrict, Guangming New District, Shenzhen

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