ALLEN BRADLEY 2711-M3A19L1_廈門光沃自動化設備有限公司

ALLEN BRADLEY 2711-M3A19L1

電流限制控制目的是使電機能發出某一大轉矩，並且不論負載有多重（甚至發生堵轉），變頻器也不會跳閘，即實現挖土機特性。由於這裏所指的中壓變頻器是串聯的18個單元，採用載波水平移相PWM調制，該18個單元的中壓變頻器每個單元輸出功率平均分配，設每個單元的輸入功率為Pm，則總功率為：

式中，Ed為功率單元逆變器輸入電壓；Id為功率單元逆變器輸入電流；ωr為電動機轉子旋轉角頻率。

如果在直流側大電容的作用下Ed恒定，那麼電流Id將與Tf1成正比。隨著負載的加重，轉矩增加，總可以通過適當降低f1使Id限制在特定水平以下。為保證實現電流限制功能，還要適當調節輸出電壓，為此設計了一種特殊的PI調節器，用於控制限制大電流，實現挖土機特性。

大電流限制調節的部分結構框圖，大電流限制PI調節器。以允許大的電流（由參數P106設置）為給定值，以“定子電流3／2變換及分解”模塊輸出的電流有效值（標麼值）為反饋，輸出2個相同的調節量△f（由變量KK0118給出，頻率調節量）和△u（由變量KK0119給出，電壓調節量），△u起輔助作用，用比例係數P121來調節。需說明：這裏雖然電流反饋值是有效值（標麼值），但它是通過A、C兩相電流瞬時值實時計算的（電流矢量幅值），因此，可以滿足電流調節的動態需求；PI調節器針對限制大電流，電流只能從大（超過大允許值）向小調，而不能從小向大調，因此，調節器輸出限幅（小於零）。根據變頻器電流限制的需要，設計的PI調節器與普通PI調節器有兩點不同：輸出調節量和輸出限幅。

ALLEN BRADLEY 2711-M3A19L1

Westinghouse Panelboard Switch FDP-326R 600 Amp FDP326R

Westinghouse 151D927G02 CLT 2 Fuse 150 C Amps 15.5kV

Eaton Cutler Hammer SVX040A2-4A1N1 40 HP VS Drive NNB

Hevi - Duty 15kVA 240/480 120/240 15 kVA 240 / 480 1ph

Electronics 22DJ3-3000 PhotoSwitch Plug-in Module

Square D H324N 200 A Fusible Safety Switch Disconnect

Square D QED Breaker Panel PXF361000LSI 1200 Amp A 4W

Westinghouse Panelboard Switch FDPS-267 800 Amp FDPS267

Foxboro 872 Monitor 872-20AMS 87220AMS

Square D Circuit Breaker FAL FAL34070 A 70 Amp NEW NIB

Westinghouse Panelboard Switch FDPS364 200 Amp A FDP

Square D Circuit Breaker FAL FAL32090 90 A 90A Amp NEW

Allen Bradley AB Size 1 Reversing Fused MCC Bucket MCCB

Siemens Breaker LMX3X800 800Amp 800A 800 Amp A LMG MG

Square D 8538 Sz 5 Combination Starter Stainless SS 3R

Square D Circuit Breaker FCL FCL34090 90 A 90A Amp NEW

Allen Bradley Fused MCC Bucket 3 Starters (10A, 60A x2)

Siemens LU 02 Sitrans Dual Point Level Controller LU02

Cutler Hammer Westinghouse FDB3020 20A A 20 Amp

Square D SE SEF Breaker Panel 4000 Amp A 4W Ground

Eaton Cutler Hammer HVX030A2-4A1B1CB 30 HP VS Drive NNB

Square D Circuit Breaker FAL32070 1212 70A Amp NEW NIB

GE General Electric TFJ TFJ236175 175Amp A 175A 175 Amp

Gould Shawmut 211-313-978 Fuse CL-13 150A 14.4kV 150 A

Federal Pacific Breaker NEF433015 15 Amp 15Amp 15A A

Cutler Hammer Westinghouse HFD HFD3020L 20 A Amp w/Aux

GE Transformer .75kVA 240 x 480 120/240 V .75 kVA 3R CU

General Electric GE RT1H Overload Relay Contactor 600V

General Electric GE CL00D310T 10E Contactor 25A CL0010E

Square D Circuit Breaker FAL FAL34090 2100 90 A Amp NEW

Cutler Hammer 10337H192B Pneumatic Timer CH 480V/440V

Cutler Hammer 10337H192B Pneumatic Timer CH 120V/110V

Cutler Hammer Unitrol Size 0 Reversing MCC Bucket 7 Amp

Furnas 40FF32AAA Sz Size 2 120V 240V Motor Contactor

GE 9F60LJD506 Fuse 6R 5.08kV EJ-2 General Electric 9F60

Cutler Hammer Westinghouse FDB3040L 40 Amp A 40Amp 40A

Modicon AS-B824-016 24 VDC OUTPUT TRUE HIGH

Cutler Hammer Unitrol Size 4 MCC Bucket 150 Amp

Westinghouse Transformer 150kVA 480Delta/208Y/120

Cutler Hammer Westinghouse FDB FDB3050L 50 Amp 50A A

ITE Gould BBC ABB K1600 S K1600S 1600A Air Breaker LSIG

Modicon AS-B825-016 24 VDC OUTPUT TRUE HIGH ASB825016

Square D Mod Model 4 Sz Size 2 Fuse MCC Bucket 8536SDO1

Modicon AS-B827-032 24 VDC Input ASB827032

Cutler Hammer Unitrol Size 1 MCC Bucket 3 Amp 2 Speed

Modicon AS-B838-032 24 VDC Output ASB838032

LG GMC GMC(D)-9 25A Contactor GMCD9 GMD9 MEC Contactor

Taylor MOD 30 1700RZ14005A-11132 Indicating Controller

Taylor MOD 30 1700RZ14004A-8695 Indicating Controller

Modicon AS-B872-100 4-20 MA Analog Current Output

General Electric GE CR7CC 10 Reversing Contactor CR7C*

Hitran Transformer 8 kVA 460/460Y/266 V 8kVA 3 PH Y

Taylor MOD 30 1700RZ14004A-8810 Controller w Power Supl

Telemecanique Altivar 58 ATV58HU72N4ZU AC Drive 5HP REM

Cutler Hammer Westinghouse FDB FDB3060L 60Amp 60 Amp A

Daykin GPFS-05 Transformer Disconnect Switch 1kVA 1 kVA

Modicon AM-S985-800 Modbus Plus Network Adapter

Square D Circuit Breaker MHL36800 800 Amp 800A A MHL

Modicon PC-E984-685 Programmable Controller PCE984685

Mitsubishi Breaker NF-SL3600 NF SL 600 Amp 600A A

Modicon PC-E984-785 Programmable Controller PC-E984785

Taylor MOD 30 X1700RZ14004A-CP850 Indicating Controller

Square D 8539/SCG44 Size 1 Combo Starter Box Breaker

Westinghouse PB 2500A PB32500F 654D456G06 1000 A TRIP

FSI FSP-1100-CS filter bag vessel Carbon Steel CS 5"