Servo Drives

任何执行器 - 无论是液压,气动还是电动 - 都能由于外力的性能或干扰的正常偏差而不正确。为了纠正这些偏差,系统设计人员使用伺服电机,从而利用反馈传感器和智能控制器,以调整执行器的性能。

Servo systems aren’t typically all-in-one — they’re made up of multiple components with distinct functions. Familiarity with different parts, like servo drives that send energy to the motor, is important when diagnosing the problem with a system or selecting the right tech for a new machine.

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What-is-a-servo-drive

什么是伺服驱动器?

伺服驱动器或放大器是系统用于电源电动伺服机构或伺服器的组件,它使用错误感测校正执行器的功能。运动控制器管理致动器的移动和纠错过程。为此,它从反馈传感设备中收集关于执行器功能的相关信息 - 通常是解析器,编码器或霍尔效应装置 - 并确定电机如何表现如何调整执行器的功能。

伺服控制器然后告诉驱动器向电机发送多少电压和电流以根据需要调整执行器输出。

通过调节驱动到致动器的功率量,伺服驱动器可以校正像速度,扭矩和位置的操作变量。

变化和伺服驱动器功能

有许多类型的伺服驱动器具有不同的功能,包括BL伺服电机的无刷驱动器,以及各种尺寸,具体取决于您所提供的空间。

单轴和多轴驱动伺服motors are available, but single-axis drives are more common. While multi-axis drives can deliver power to motors that control multiple actuator axes, single-axis drives remain popular. These drives are typically used when there are only a few axes in a system, or when each of those axes needs a significant amount of power — typically, larger than 15 kW for individual axes.

大多数驱动器也被配置为与同一品牌的电机一起使用。

伺服驱动器和运动控制器之间的差异

Servo systems and motion controllers both work together to adjust the movement of an actuator. They don’t perform the same work, however.

运动控制器通过调节伺服放大器向电动机发送多少功率来控制致动器的输出,以便致动器以所需的方式移动 - 是否意味着调节速度,位置或角旋转。

Typically, a controller provides one of两个主要功能- 设定值跟踪,也称为参考或命令跟踪,或干扰拒绝。

Setpoint tracking makes sure the actuator’s movements line up with the expected output. A command-tracking controller calculates deviation and signals the servo motor to adjust speed based on how the actuator should be performing.

Disturbance rejection, by contrast, monitors for outside sources, also called disturbances or “loads,” that change the function of the actuator — like vibrations from other systems, changes in pressure or resistance against actuator movement. The controller then determines how the servo system can move to correct for this disturbance, balancing it out and returning the actuator to roughly the movement needed.

如果运动控制器检测到与系统的反馈传感设备的偏差,则它将信息发送到伺服驱动器,告诉它要向电机发送到校正该执行器的运动的能量量。

Typically a feedback controller will only be responsible for either setpoint tracking or disturbance rejection.

While amplifiers and controllers are separate components, they may sometimes be sold together as servo controllers. These provide the same functionality as the separate parts but bundled into one enclosure.

Common Problems With Servo Drives

就像任何工业设备一样,伺服驱动器和系统将在时间后需要维修或更换。

Often, with the right knowledge, you cantroubleshoot and resolve many common problems伺服驱动器和电机面对他们的寿命。

1. Overheating, Smoke or a Burning Odor

Servo drives can be susceptible to overheating, especially in hotter summer months.

温度传感器可以告诉您驱动器是否过热。您还可以在伺服系统周围获得燃烧气味的形式的警告标志或“有趣的气味”。

意外的烟雾通常是一个可靠的标志,出现了出现问题。如果是电子元件或驱动器lets out any “magic smoke”激活时,它可能指示由于过载或短路而导致的内部电子器件正在燃烧。

If you think the drive is overheating, turning it off and inspecting the cooling system is a good place to start. Insufficient air flow or clogged filter in a cooling system can cause system components to overheat, including the drive. If your servo isn’t enclosed, you can check the drive for dust or dirt particles that may clog the drive and cause it to overheat.

Overheating can also be caused by old equipment — in these cases, replacing the drive may be the best option.

虽然气流适用于伺服驱动器,但打开外壳或橱柜门以暴露伺服驱动器并不是一个好主意。这更有可能让空气中的灰尘和污垢,特别是与外部盒子或工业风扇结合时。

2.不稳定的运动或减少扭矩

Unexpected adjustments to the actuator’s movement — or reduced torque in the actuator due to servo motor malfunction — may be a sign that something is wrong with the servo drive.

如果驱动器从系统接收低电压,则它不能向电机驱动正确的电源。损坏,开放或不正确的系统接线也可能损害驱动性能。

Reduced torque may also mean that the desired motor inertia may be beyond the capacity of the amplifier you have installed.

3.没有对控制器命令的响应

If the drive doesn’t respond at all to controller signals, it could be a sign of a more serious problem — or faulty connections between different components in the servo and actuator system.

它也可能是一个或多个连接到驱动器的电线打开,损坏或以其他方式有缺陷。控制器中可能存在故障,控制器的数字 - 模拟转换器输出可能不正确。如果发现控制器的DAC参数的值为零点或ZEROY,则可能意味着需要更换控制器。另一方面,较高的值可以通过系统中的另一个组件来信号信号正确函数和问题。

Contact Global Electronic Services for Repairs or to Buy Servo Drives

无论您是需要伺服驱动器维修还是想购买伺服驱动器,全球电子服务都可以提供帮助。bob亚博平手机登录我们的技术人员和销售人员有多年的经验和解决您的问题的专业知识或为您的设备找到合适的驱动程序。

If you’re interested in working with us, call today at 877-249-1701, orbob sportstoday to get in touch.

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