TRD-J600-RZL
伊詩圖電氣銷售部
銷售熱線: 180-6090-9625/0592-6013512
聯系人：蘭工
QQ: 869740621
直流電機主要分為定子和轉子兩大部分。定轉子之間存在的間隙稱為氣隙。
1．定子
定子是電機的靜止部分，主要用來產生磁場。它主要包括：
（1）主磁極 主磁極包括鐵心和勵磁繞組兩部分。當勵磁繞組中通人直流電流后，鐵心中即產生勵磁磁通，并在氣隙中建立勵磁磁場。勵磁繞組通常用圓形或矩形的絕緣導線制成一個集中的線圈，套在磁極鐵心外面。主磁極鐵心一般用1～1.5mm厚的低碳鋼板沖片疊壓鉚接而成，主磁極鐵心柱體部分稱為極身，靠近氣隙一端較寬的部分稱為極靴，極靴與極身交接處形成一個突出的肩部，用以支撐住勵磁繞組。極靴沿氣隙表面成弧形，使磁極下氣隙磁通密度分布更合理。整個主磁極用螺桿固定在機座上。
主磁極總是N、S兩極成對出現。各主磁極的勵磁繞組通常是相互串聯連接，連接時要能保證相鄰磁極的極性按N、S交替排列。
（2）換向極 換向極也由鐵心和繞組構成。中小容量直流電機的換向極鐵心是用整塊鋼制成的，大容量直流電機和換向要求高的電機，換向極鐵心用薄鋼片疊成，換向極繞組要與電樞繞組串聯，因通過的電流大，導線截面較大，匝數較少。換向極裝在主磁極之間，換向極的數目一般等于主磁極數，在功率很小的電機中，換向極的數目有時只有主磁極極數的一半，或不裝換向極。換向極的作用是改善換向，防止電刷和換向器之間出現過強的火花。
（3）電刷裝置 電刷裝置由電刷，刷握、壓緊彈簧和刷桿座等組成。電刷是用碳-石墨等做成的導電塊，電刷裝在刷握的盒內，用壓緊彈簧把它壓緊在換向器的表面上。壓緊彈簧的壓力可以調整，保證電刷與換向器表面有良好的滑動接觸，刷握固定在刷桿上，刷桿裝在刷桿座上，彼此之間絕緣。刷桿座裝在端蓋或軸承蓋上，根據電流的大小，每一刷桿上可以有幾個電刷組成的電刷組，電刷組的數目一般等于主磁極數。電刷的作用是與換向器配合引入、引出電流。
（4）機座和端蓋 機座一般用鑄鋼或厚鋼板焊接而成。它用來固定主磁極、換向極及端蓋，借助底腳將電機固定于基礎上、機座還是磁路的一部分，用以通過磁通的部分稱為磁軛，端蓋主要起支撐作用，端蓋固定于機座上，其上放置軸承，支撐直流電機的轉軸，使直流電機能夠旋轉。
2．轉子
轉子是電機的轉動部分，轉子的主要作用是感應電動勢，產生電磁轉矩，使機械能變為電能（發電機）或電能變為機械能（電動機）的樞紐。它主要包括：
（1）電樞 電樞又包括鐵心和繞組兩部分。
①電樞鐵心 電樞鐵心一般用0.5mm厚的涂有絕緣漆的硅鋼片沖片疊成，這樣鐵心在主磁場中轉動時可以減少磁滯和渦流損耗。鐵心表面有均勻分布的齒和槽，槽中嵌放電樞繞組。電樞鐵心構成磁的通路。電樞鐵心固定在轉子支架或轉軸上。
②電樞繞組 電樞繞組是用絕緣銅線繞制成的線圈按一定規律嵌放到電樞鐵心槽中，并與換向器作相應的連接。線圈與鐵心之間以及線圈的上下層之間均要妥善絕緣，用槽楔壓緊，再用玻璃絲帶或鋼絲扎緊。電樞繞組是電機的核心部件，電機工作時在其中產生感應電動勢和電磁轉矩，實現能量的轉換。
（2）換向器 換向器的作用是與電刷配合，將直流電動機輸入的直流電流轉換成電
樞繞組內的交變電流，或是將直流發電機電樞繞組中的交變電動勢轉換成輸出的直流電壓。
換向器是一個由許多燕尾狀的梯形銅片間隔云母片絕緣排列而成的圓柱體，每片換向片的一端有高出的部分，上面銑有線槽，供電樞繞組引出端焊接用。所有換向片均放置在與它配合的具有燕尾狀槽的金屬套簡內，然后用V形鋼環和螺紋壓圈將換向片和套筒緊固成一整體，換向片組與套筒、V形鋼環之間均要用云母片絕緣。
（3）轉軸 在轉軸上安裝電樞和換向器。
3．氣隙
靜止的磁極和旋轉的電樞之間的間隙稱為氣隙。在小容量電機中，氣隙為0.5～3mm。氣隙數值雖小，但磁阻很大，為電機磁路的主要組成部分。氣隙大小對電機運行性能有很大影響。
電機有兩大類：交流電機、直流電機。交流電機中用得最多的是異步電機（感應電機），轉別是鼠籠式異步電機�，F在伊詩圖電氣Eastour給大家介紹直流電機、交流電機調速方法。
直流電機調速方法：
直流電機是指將直流電送到直流電機，把直流電機的電能轉換成機械能。這里首先要介紹如何將市電的交流電轉換成需要的直流電。六十年代以前采用的是發電機－－電機系統（f-d），這種方法只有在電機由專用的發電機供電時才有可能。另一種是可控硅－－電機系統（scr-d）。
直流電機的調速還比較方便，可以通過調節電樞供電電壓，電樞中串聯電阻，激磁回路串聯電阻來實現。
可見直流電機調速有三種方法，而且調節電樞供電電壓的方法容易實現平滑、無級、寬范圍、低損耗的要求。直流電動機電磁轉矩中的兩個可控參量和是互相獨立的，可以非常方便地分別調節，這種機理使直流電動機具有良好的轉矩控制特性，從而有優良的轉速調節性能。
盡管直流電機調速就其性能而言，可以相當滿意，但因其結構夏雜，慣量大，維護麻煩，不適宜在惡劣環境中運行，不易實現大容量化、高壓化、高速化，而且價格昂貴。
交流電機調速方法：
交流電機剛好相反。交流電機結構簡單、慣量小、維護方便，可在惡劣環境中運行，容易實現大容量化、高壓化、高速化，而且價格低廉。
從節能的角度看，交流電機的調速裝置可以分為高效調速裝置和低效調速裝置兩大類。高效調速裝置的特點是：調速時基本保持額定轉差，不增加轉差損耗，或可以將轉差動率回饋至電網。
低效調速裝置的特點是：調速時改變轉差，增加轉差損耗。
高效調速方法包括：改變極對數調速—鼠籠式電機變頻調速—鼠籠式電機串級調速—繞線式電機換向器電機調速—同步電機。
低效調速方法包括：定子調壓調速—鼠籠式電機電磁滑差離合器調速—鼠籠式電機轉子串電阻調速—繞線式電機。
伊詩圖電氣Eastour專業銷售感應電機、調速電機、可逆電機、電磁制動電機、力矩電機、小型齒輪減速電機、直流有刷電機、直流無刷電機、行星減速機等。
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SQUARE D 125 AMP NEHB MAIN LUG PANELBOARD 480Y/277 VAC 30 CIRCUIT
SQUARE D ELECTRICAL CONTROLS CONTROL BOX 8538 SCA24
Returns: Accepted within 60 days
SQUARE D CAT#LHL3600M 400A/600VAC/3POLE
Square D 800 Amp 600V Breaker 3 Pole MAL36800 A-25
Square D NHF361200G 1200a GF shunt trip 240v 100k 480v 50k 5k-10k trip range 3 p
SQUARE D 200A LIGHTING CONTACTOR SERIES B 8903 SV01
SQUARE D POWERPACT CIRCUIT BREAKER CAT#HJA36070 70A/600V/3POLE
Square D: PowerLogic Circuit Monitor, Class: 3020 / CM2350, w/ VPM-277-C1
Square D EDB36030 Circuit Breaker 30 Amp 600V ! NEW !
1 USED SQUARE D LAL2640036M80 400 AMP CIRCUIT BREAKER
Square D Merlin Gerin NFHF36020 NSF150H 20A 3 Poles Circuit Breaker (6766)
Square D 9070-GO-4D1 Transformer 240/480-120V ! NEW !
Square D Circuit Breaker LAL36400 400 Amps #15998
Square D KAL kal361256139 125 amp kal36125 Breaker
NEW SQUARE D SWITCHGEAR LOAD SIDE FUSE ACCESSORY 80102*
New Square D 8903LXG30V02 Mechanically Held Lighting Contactor in Enclosure.
Square D LA LA36000 series 3 400 amp 3 pole Breaker molded case switch
1 USED SQUARE D DARK GREEN FACE FAL340801212 CIRCUIT BREAKER
SQUARE D KA KA26200bc 200 AMP 2 POLE CIRCUIT BREAKER
SQUARE D POWERLOGIC ENERCEPT METER 8012 100 AMP
SQUARE D MAL364508041 CIRCUT BREAKER (WITH LUGS) XLNT!
SQUARE D 200A MAIN BREAKER PANEL CAT#QOC342MS 120/208V 3 PHASE 4 WIRE
SQUARE D 8020 SCP-401 PLC PROCESSOR MODEL 400 SY/MAX
SQUARE D 100A 3P I-LINE BREAKER QJA32100 NEW PULL LL-29
Square D 20T145HDIT Isolation Transformer
SQUARE D CIRCUIT BREAKER CAT#LA360400
SQUARE D 8903LA1200V02 30A SERIES C TYPE 12 ENCLOSURE LIGHTING CONTACTOR, NIB
1 NEW SQUARE D 9007-TUD5 LIMIT SWITCH 4 NIB 1 NNB
Square D LAP36400MB Molded Case Circuit Breaker 600V 400A 3P (Used)
Square D # PA31200RC Circuit Breaker Rating Columns 1200 Amps Set of 3 NIB
Square D E-894688 Size 2 Motor Control Center Bucket 480V 50A 3PH
NEW Square D QOU30001 Molded Case Circuit Breaker 125A 3-Pole 240VAC 50/60Hz
Square D - QDA221501 - Circuit Breaker - 150A - 2 Pole - 240V - 50/60Hz - New
Square D Motor Controller Unit E-659652 ED404 100 Amp Trip Box Instant
SQUARE D SY/MX SPE4-1S (NR&D) SERIAL PORT EXPAN, GOOD TAKEOUT
GOOD USED SQUARE D PANELBOARD ENCLOSURE / BOX MH23WP
Square D PFCD4007 Power Factor Correction Capacitor
SQUARE D SYMAX 8030RIM101 INPUT MODULE 16PT NEW IN BOX
Square D 8998-S-665,780 Motor Control Center Unit 480Y/277V 3PH 5HP
Square D 8998-S-665,777 Motor Control Center Unit 480Y/277V 3PH 5HP
Square D LA36400 Circuit Breaker 600V 400A 3P
Square D LH36400 Circuit Breaker 600V 400A 3P
SQUARE D SY/MAX MODEL 700 PROCESSOR 8020 SCP-721 S30608-557
Square D HU361DS Heavy Duty Safety Switch 600V 30A NIB
Square D H361NDS Heavy Duty Safety Switch 600V 30A
NEW PM8 Square D Powerlogic Display Adapter
Square D HU461 Heavy Duty Safety Switch 600V 30A (NIB)
Square D 8538SDG12V02S Motor Control 230V 60A
Hoffman UU605025W electrical enclosure w/ square D panel type 3 3R 4 4X 12 13
