什么是IP轉(zhuǎn)換器？
I / P轉(zhuǎn)換器是工業(yè)控制系統(tǒng)中使用的電流轉(zhuǎn)換為壓力的傳感器。它是一種小型模塊設(shè)備，用于應用程序中，將當前的模擬信號（I）轉(zhuǎn)換為氣動輸出（P）。換句話說，它從DC（直流）信號中獲取電信號，并將這些信號轉(zhuǎn)換為成比例的氣壓。 I / P傳感器轉(zhuǎn)換來自控制器的電信號，以向工業(yè)機構(gòu)內(nèi)的閥門，阻尼器，執(zhí)行器或制動器和離合器施加氣壓。
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.
在我們詳細介紹IP轉(zhuǎn)換器之前，需要注意的是，通常這些轉(zhuǎn)換器有兩種類型，即IP轉(zhuǎn)換器和EP轉(zhuǎn)換器。 IP轉(zhuǎn)換器通常會接收4-20mA信號并將其轉(zhuǎn)換為氣動輸出。與EP轉(zhuǎn)換器的區(qū)別在于，它接收0-10v信號并將其轉(zhuǎn)換為氣動輸出。 IP轉(zhuǎn)換器使用電流，而EP轉(zhuǎn)換器使用電壓。
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轉(zhuǎn)換器的工作原理
I / P轉(zhuǎn)換器的工作原理與比例閥類似，因為它們提供可調(diào)節(jié)的流量和控制功能。在將電流轉(zhuǎn)換為氣動輸出時，I / P轉(zhuǎn)換器也無需外部電源來控制氣動組件。這樣，I / P轉(zhuǎn)換器可提高機器效率和控制能力。
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轉(zhuǎn)換器的功能涉及電磁力平衡原理的概念，即將電流轉(zhuǎn)換為力然后轉(zhuǎn)換為壓力的過程。簡而言之，為了使I / P轉(zhuǎn)換器正常工作，可以利用電磁效應來建立電流，從而迫使傳感器進行機械驅(qū)動。該動作將電流（通常為4到20 mA）轉(zhuǎn)換為氣壓輸出（3到15 psi），然后根據(jù)力平衡原理成比例地控制閥門的打開或關(guān)閉。
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.
當I / P轉(zhuǎn)換器運行時，它們會傳遞與接收到變送器電路中的電流速率相關(guān)的成比例的下游壓力流。在控制系統(tǒng)中，I / P轉(zhuǎn)換器是控制器與氣動制動器和離合器之間的重要連接接口。
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電流-氣動信號轉(zhuǎn)換器（圖1）是一種現(xiàn)場安裝的儀器，可將直流毫安輸入信號轉(zhuǎn)換為比例氣動輸出信號。
該輸出信號既可以用于操作風門，閥門執(zhí)行器等氣動裝置，也可以用作各種氣動儀器的輸入。
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電流-氣動信號轉(zhuǎn)換器的工作原理
直流毫安輸入信號通過以下方式轉(zhuǎn)換為比例氣動輸出信號（參見圖2）。放置在永磁體磁場中的線圈通過產(chǎn)生與流經(jīng)它的輸入信號成比例的切向推力來對電流做出反應。通過線圈彎曲而產(chǎn)生的推力會改變擋板和噴嘴之間的間隙。這會導致繼電器的輸出壓力發(fā)生變化，這也是轉(zhuǎn)換器的輸出壓力。該壓力被饋送到反饋波紋管，該反饋波紋管在反饋彎曲件上施加力以移動噴嘴并在擋板和噴嘴之間建立節(jié)流關(guān)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.
