GE D20A

分類:
選擇深圳長欣,選擇放心,售后無憂
大量現貨,當天順豐發(fā)貨!
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描述

GE D20A
測量轉子速度的方法很多,但多數比較復雜[1]。目前,測量轉速的方法主要有四種[2]:機械式、電磁式、光電式和激光式。機械式主要利用離心力原理,通過一個隨軸轉動的固定質量重錘帶動自由軸套上下運動,根據不同轉速對應不同軸套位置獲得測量結果原理簡單直接,不需額外電器設備,適用于精度要求不高、接觸式的轉速測量場合。電磁式系統由電磁傳感器和安裝在軸上的齒盤組成,主軸轉動帶動齒盤旋轉,齒牙通過傳感器時引起電路磁阻變化,經過放大整形后形成脈沖,通過脈沖得到轉速值。由于受齒盤加工精度、齒牙最小分辨間隔、電路最大計數頻率等限制,測量精度不能保證。光電式結構類似于電磁式結構,把旋轉齒盤換作光電編碼盤或黑白相間的反射條紋,把電磁傳感器換作光電接收器,通過對反射回來的光脈沖信號計數得到測量結果。由于受條紋最小分辨間隔、電路最大計數頻率等限制,測量精度不能保證,所測轉速值和電磁式一樣為兩個計數脈沖間距的平均值。激光測速技術(LDV)是一種正在發(fā)展中的測速技術,通過激光多普勒效應獲得轉動體的瞬時角速度,理論上具有很高的瞬時轉速測量精度,但目前實際產品精度不夠高,并且價格昂貴,在實際使用上受到限
制。通過改進已有的電磁式傳感器,設計一種適于瞬時轉速測量的新型傳感器,在旋轉機械瞬時狀態(tài)分析中具有一定的實際意義。
本文以傳統的電磁式系統為基礎,研制一種使用紅外輻射技術的新型轉速測量儀,安裝方便,對周圍環(huán)境要求不高,可以很容易地完成轉速的測量。具有較寬的動態(tài)測量范圍,測量精度較高。

產品承諾:
保?證?全新原裝進口,
保?證?安全準時發(fā)貨,
保?證售后服務質量,
優(yōu)勢價格,大量現貨。

主營DCS系統配件
機器人系統配件
大型伺服系統配件
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Triconex?Siemens?Yaskawa?ABB?GE?Ovation?AB?Foxboro?Motorola?Schneider?XYCOM?KUKA
? 專業(yè)銷售進口DCS? PLC系統備件模塊 15天包退換 一年質保 大量現貨? 國內實力庫存商家

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FIREYE MC120 FLAME SENSOR 120V CHASSIS 50/60HZ **XLNT**

8171 NEW Fireye MP230 Programmer Module

FIREYE MEP100 Programmer Module, see bulletin MP-5101

FIREYE MC120 *NICE*

FIREYE BURNER CONTROL EB-700 ED500 EP170 EUVS4 60-14662

FIREYE E110 AUTOMATIC BURNER PRIMARY SAFETY CONTROL

FIREYE MEP100 Programmer Module, see bulletin MP-5101

FIREYE E100 Flame Monitor Chassis Display & Cover NEW

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FIREYE EB-700 AUTOMATIC PRIMARY FLAME MONITOR

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Fireye EP160 PROGRAMMER MODULE

### FIREYE EB-700 AUTOMATIC PRIMARY FLAME MONITOR
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FIREYE AUTOMATIC PRIMARY SAFETY CONTROL EB-700 PT2

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FIREYE PRIMARY SAFETY CONTROL 5023A TYPE 26CF6 USED

FIREYE EP160 PROGRAMMER MODULE

Fireye EP380 Programmer Module, NEW

FIREYE E1R1 FLAME AMPHIFIER MODULE CARD FOR EB-700

Fireye 61-3060 Wiring Base Closed M-Series/MSerie?s II

Fireye Programmer Module EP160 EP-160 NEW

Allen-Bradley Fireye EB-700 Auto.Primary Safety Control

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USED Fireye MEC-120D Protectorelay / Flame Safeguard

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Fireye 70D30 Flame Safeguard Boiler Control Used

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NEW FIREYE PROGRAMMER MODULE FLAME MONITOR EP161

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Fireye 38-58 Flame Signal Meter Used

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FIREYE 129-145-1 REMOTE MOUNTING 4′ ED510 1291451

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FIREYE EP160 PROGRAMMER MODULE

FIREYE MART1 FLAME ROD AMPLIFIER

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FIREYE 60-2060-2 PFM ADAPTER, USED WITH PFM2 KITS

1 NIB FIREYE E1R1 INFRARED AUTO CHECK AMPLIFIER MODULE

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Fireye Type 26RJ8 Model 6080 Programmer

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FIREYE MEP230 FLAME SAFEGUARD BURNER BOILER CONTROL

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Fireye 2227, 22-27 Lithium Battery for EP340

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Fireye High Voltage Power Supply Din Rail MBHPS100D

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Fireye 26RJ8 Burner Control System

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FIREYE PROGRAMMER MODULE EP380

FIREYE ERT1 FLAME RECTIFICATION FLAME AMPLIFIER MODULE

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PLC模塊,可編程控制器,CPU模塊,IO模塊,AI模塊,通訊模塊。AB/施耐德/ABB/GE/本特利/西屋/英維斯/霍尼韋爾/黑馬/FU克斯波羅

15天包退換 一年質保 大量現貨? 國內實力庫存商家


選擇深圳長欣,選擇放心,售后無憂大量現貨,當天順豐發(fā)貨!
主營:本特利,英維思,伍德沃德,??怂共_、西屋、瑞恩、施耐德莫迪康、ABB、AB、西門子、摩托羅拉、GE發(fā)那科、安川、博世力士樂,ACSO,力士樂等各大品牌的DCS系統配件,機器人系統配件,大型伺服系統備件。

先介紹幾點經驗。
1、先通讀一遍“系統手冊”(不管能不能看懂,先了解個大概,以便學習編程時查找);
2、由位控邏輯入手,逐漸增加定時、計數等條件,把或、與、非關系理順;
3、進而練習整數運算、實數運算、類型轉換;
4、量程轉換、PID調節(jié)回路的建立及P、I、D參數的理解(最好是有個物理回路驗證,比如變頻器+電機+測速傳感器);
5、循環(huán)、順序、跳轉等程序控制(盡量避免跳轉,非跳不可時也是跳的越近越好);
6、中斷、通訊、位置控制....

本人以ABB工業(yè)機器人配件DSQC系列和Motorola MVME系列,GE 卡件 模塊 驅動器系列為主攻。各位電工朋友可根據自己的條件選擇適合自己的PLC品牌,由于PLC的基本框架大同小異,學會一種至于其它的學習起來也就簡單了。