什么是IP转换器？

I / P转换器是工业控制系统中使用的电流转换为压力的传感器。它是一种小型模块设备，用于应用程序中，将当前的模拟信号（I）转换为气动输出（P）。换句话说，它从DC（直流）信号中获取电信号，并将这些信号转换为成比例的气压。 I / P传感器转换来自控制器的电信号，以向工业机构内的阀门，阻尼器，执行器或制动器和离合器施加气压。

An I/P converter is a current-to-pressure transducer utilized in industrial control systems. It is a small module device used in applications to translate a current analog signal (I) into a pneumatic output (P). In other words, it takes electrical signals from a DC (direct current) signal and converts those signals into proportional pneumatic pressure. I/P transducers convert electrical signals from a controller to apply pneumatic pressure to valves, dampeners, actuators, or brakes and clutches within an industrial mechanism.

在我们详细介绍IP转换器之前，需要注意的是，通常这些转换器有两种类型，即IP转换器和EP转换器。 IP转换器通常会接收4-20mA信号并将其转换为气动输出。与EP转换器的区别在于，它接收0-10v信号并将其转换为气动输出。 IP转换器使用电流，而EP转换器使用电压。

Before we go into the details of an IP converter it is important to note that typically there are two types of these converters available, an IP converter and an EP converter. The IP converter most commonly receives a 4-20mA signal and converts it to a pneumatic output. The difference with an EP converter is that it receives a 0-10v signal and coverts it to a pneumatic output. The IP converter works with current and the EP converter works with voltage.

IP转换器的工作原理

I / P转换器的工作原理与比例阀类似，因为它们提供可调节的流量和控制功能。在将电流转换为气动输出时，I / P转换器也无需外部电源来控制气动组件。这样，I / P转换器可提高机器效率和控制能力。

IP Converter Working Principle

I/P Converters operate on a similar principle as proportional valves in that they provide adjustable flow volumes and control functions. In converting electric current into pneumatic output, I/P converters also eliminate a need for an external power supply to control the pneumatic operated components. In doing so, I/P converters increase machine efficiency and control.

I / P转换器的功能涉及电磁力平衡原理的概念，即将电流转换为力然后转换为压力的过程。简而言之，为了使I / P转换器正常工作，可以利用电磁效应来建立电流，从而迫使传感器进行机械驱动。该动作将电流（通常为4到20 mA）转换为气压输出（3到15 psi），然后根据力平衡原理成比例地控制阀门的打开或关闭。

The function of I/P converters relates to the concept of an electromagnetic force balance principle, i.e., the process of converting electric current into force and then pressure. Simply, for I/P converters to work, electromagnetic effects are exploited to build current which force transducers for mechanical actuation. This action converts electrical current (typically 4 to 20 mA) into pneumatic pressure output (3 to 15 psi) that, in turn, proportionally controls the opening or closing of a valve according to the force balance principle.

当I / P转换器运行时，它们会传递与接收到变送器电路中的电流速率相关的成比例的下游压力流。在控制系统中，I / P转换器是控制器与气动制动器和离合器之间的重要连接接口。

As I/P converters operate, they deliver proportional downstream flow of pressure related to the rate of electrical current that is received into the transducer’s electrical circuit. In control systems, I/P converters serve as an important connecting interface between the controller and pneumatic brakes and clutches.

FOXBORO E69F电流-气动信号转换器（图1）是一种现场安装的仪器，可将直流毫安输入信号转换为比例气动输出信号。

该输出信号既可以用于操作风门，阀门执行器等气动装置，也可以用作各种气动仪器的输入。

FOXBORO the E69F Current-to-Pneumatic Signal Converter (Figure 1) is a field-mounted instrument that transforms a dc milliampere input signal to a proportional pneumatic output signal.

This output signal can be used either to operate such pneumatic devices as dampers, and valve actuators, and so forth, or as the input to various pneumatic instruments.

FOXBORO E69F电流-气动信号转换器的工作原理

直流毫安输入信号通过以下方式转换为比例气动输出信号（参见图2）。放置在永磁体磁场中的线圈通过产生与流经它的输入信号成比例的切向推力来对电流做出反应。通过线圈弯曲而产生的推力会改变挡板和喷嘴之间的间隙。这会导致继电器的输出压力发生变化，这也是转换器的输出压力。该压力被馈送到反馈波纹管，该反馈波纹管在反馈弯曲件上施加力以移动喷嘴并在挡板和喷嘴之间建立节流关系。

FOXBORO E69F Current-to-Pneumatic Signal Converter Principle of Operation

A dc milliampere input signal is converted to a proportional pneumatic output signal in the following manner (see Figure 2). A coil positioned in the field of a permanent magnet reacts to the current by producing a tangential thrust proportional to the input signal flowing through it. The thrust, acting through coil flexures, varies the gap between a flapper and a nozzle. This causes a change in the output pressure of the relay, which is also the converter output pressure. This pressure is fed to a feedback bellows which exerts a force on a feedback flexure to move the nozzle and establish a throttling relationship between the flapper and the nozzle.