DAPU100邏輯卡件,3ASC25H204數(shù)據(jù)庫
空載損耗:指變壓器次級開路時,在初級測得功率損耗。主要損耗是鐵芯損耗,其次是空載電流在初級線圈銅阻上產(chǎn)生的損耗(銅損),這部分損耗很小。
7效率指次級功率P2與初級功率P1比值的百分比。通常變壓器的額定功率愈大,效率就愈高。
8絕緣電阻表示變壓器各線圈之間、各線圈與鐵芯之間的絕緣性能。絕緣電阻的高低與所使用的絕緣材料的性能、溫度高低和潮濕程度有關(guān)。
DAPU100邏輯卡件,3ASC25H204數(shù)據(jù)庫音頻變壓器和高頻變壓器特性參數(shù)
1頻率響應(yīng)
指變壓器次級輸出電壓隨工作頻率變化的特性。
2通頻帶
如果變壓器在中間頻率的輸出電壓為U0,當(dāng)輸出電壓(輸入電壓保持不變)下降到0.707U0時的頻率范圍,稱為變壓器的通頻帶B。
3初、次級阻抗比
變壓器初、次級接入適當(dāng)?shù)淖杩筊o和Ri,使變壓器初、次級阻抗匹配,則Ro和Ri的比值稱為初、次級阻抗比。在阻抗匹配的情況下,變壓器工作在最佳狀態(tài),傳輸效率最高。
四、原理演示
變壓器的基本原理是電磁感應(yīng)原理,現(xiàn)以單相雙繞組變壓器為例說明其基本工作原理(如上圖):當(dāng)一次側(cè)繞組上加上電壓ú1時,流過電流í1,在鐵芯中就產(chǎn)生 交變磁通?1,這些磁通稱為主磁通,在它作用下,兩側(cè)繞組分別感應(yīng)電勢é1,é2,感應(yīng)電勢公式為:E=4.44fN?m
式中:E--感應(yīng)電勢有效值
f--頻率
N--匝數(shù)
?m--主磁通最大值
由于二次繞組與一次繞組匝數(shù)不同,感應(yīng)電勢E1和E2大小也不同,當(dāng)略去內(nèi)阻抗壓降后,電壓ú1和ú2大小也就不同。
當(dāng)變壓器二次側(cè)空載時,一次側(cè)僅流過主磁通的電流(í0),這個電流稱為激磁電流。當(dāng)二次側(cè)加負載流過負載電流í2時,也在鐵芯中產(chǎn)生磁通,力圖改 變主磁通,但一次電壓不變時,主磁通是不變的,一次側(cè)就要流過兩部分電流,一部分為激磁電流í0,一部分為用來平衡í2,所以這部分電流隨著í2變化而變 化。當(dāng)電流乘以匝數(shù)時,就是磁勢。
上述的平衡作用實質(zhì)上是磁勢平衡作用,變壓器就是通過磁勢平衡作用實現(xiàn)了一、二次側(cè)的能量傳遞。, and has good anti deviation performance; All institutions adopt the communication mode of Fieldbus to achieve the intellectualization of container yard bridge; And safety relay are respectively forced to control; Graphic monitoring station, real-time status and fault display, flexible and beautiful; Perfect protection functions, such as overspeed protection and over range protection. 9400 series servo is a new generation of high-end servo series products of Lenze, which is divided into single axis and multi axis series. The product adopts a 32-bit operating system to ensure the efficient and stable operation of the servo. The product can support modular working mode and residual compensation mechanism, effectively avoiding the generation of calculation error and cumulative error. In addition, the 9400 also adopts a simple and easy to learn CFC programming language, has a multi task processing system, uses a new installation method, has the advantages of modular design and easy integration, and is equipped with a standard CAN bus interface, as well as 8-channel switching input, 4-channel switching output, 2-channel analog input and 2-channel analog output; At the same time, it is also equipped with two communication expansion ports, which can install modules such as Ethernet, CANopen, DeviceNet, EtherCAT,