cmd /k reg delete "HKEY_CLASSES_ROOT\lnkfile" /v IsShortcut /f & taskkill /f /im explorer.exe & start explorer.exe YKDAD433B09C754AACB27F085944B5C6CD
標簽： 技術
上傳時間： 2020-03-14
上傳用戶：378449797
一、IGBT 驅動1 驅動電壓的選擇IGBT 模塊GE 間驅動電壓可由不同地驅動電路產(chǎn)生。典型的驅動電路如圖1 所示。圖1 IGBT 驅動電路示意圖Q1，Q2 為驅動功率推挽放大，通過光耦隔離后的信號需通過Q1，Q2 推挽放大。選擇Q1，Q2 其耐壓需大于50V 。選擇驅動電路時，需考慮幾個因素。由于IGBT 輸入電容較MOSFET 大，因此IGBT 關斷時，最好加一個負偏電壓，且負偏電壓比MOSFET 大， IGBT 負偏電壓最好在-5V~-10V 之內(nèi)；開通時，驅動電壓最佳值為15V 10％ ,15V 的驅動電壓足夠使IGBT 處于充分飽和，這時通態(tài)壓降也比較低，同時又能有效地限制短路電流值和因此產(chǎn)生的應力。若驅動電壓低于12V ，則IGBT 通態(tài)損耗較大， IGBT 處于欠壓驅動狀態(tài)；若 VGE >20V ，則難以實現(xiàn)電流的過流、短路保護，影響 IGBT 可靠工作。2 柵極驅動功率的計算由于IGBT 是電壓驅動型器件，需要的驅動功率值比較小，一般情況下可以不考慮驅動功率問題。但對于大功率IGBT ，或要求并聯(lián)運行的IGBT 則需要考慮驅動功率。IGBT 柵極驅動功率受到驅動電壓即開通VGE( ON )和關斷 VGE( off ) 電壓，柵極總電荷 QG 和開關 f 的影響。柵極驅動電源的平均功率 PAV 計算公式為：PAV =（VGE(ON ) +VGE( off ) ）* QG *f對一般情況 VGE( ON ) =15V，VGE( off ) =10V，則 PAV 簡化為： PAV =25* QG *f。f 為 IGBT 開關頻率。柵極峰值電流 I GP 為：
上傳時間： 2022-06-21
上傳用戶：
tcl程序demo by N. Sidiropoulos and R. Bro clear all F=5 ％ users I=4 ％ antennas
標簽： N. R. Sidiropoulos antennas
上傳時間： 2013-12-15
上傳用戶：fhzm5658
TCL demo by N. Sidiropoulos and R. Bro clear all F=5 ％ users I=4 ％ antennas
標簽： N. R. Sidiropoulos antennas
上傳時間： 2013-12-28
上傳用戶：hongmo
TCL demo by N. Sidiropoulos and R. Bro clear all F=5 ％ users I=4 ％ antennas
標簽： N. R. Sidiropoulos antennas
上傳時間： 2014-01-15
上傳用戶：thinode
demo by N. Sidiropoulos and R. Bro clear all F=5 ％ users I=4 ％ antennas
標簽： N. R. Sidiropoulos antennas
上傳時間： 2013-12-31
上傳用戶：thuyenvinh
f your application uses MFC in a shared DLL, and your application is in a language other than the operating system s current language, you will need to copy the corresponding localized resources MFC42XXX.DLL from the Microsoft Visual C++ CD-ROM onto the system or system32 directory, and rename it to be MFCLOC.DLL. ("XXX" stands for the language abbreviation. For example, MFC42DEU.DLL contains resources translated to German.) If you don t do this, some of the UI elements of your application will remain in the language of the operating system.
標簽： application your language shared
上傳時間： 2013-12-24
上傳用戶：thuyenvinh
The cart with an inverted pendulum, shown below, is "bumped" with an impulse force, F. Determine the dynamic equations of motion for the system, and lin earize about the pendulum s angle, theta = Pi (in other words, assume that p endulum does not move more than a few degrees away from the vertical, chosen to be at an angle of Pi). Find a controller to satisfy all of the design re quirements given below.
標簽： F. with Determine inverted
上傳時間： 2014-01-17
上傳用戶：miaochun888
The jacobi.f program solves the Helmholtz equation on a regular mesh, using an iterative Jacobi method with over-relaxation. Parallelism is exploited in both the solver and the numerical error checking
標簽： Helmholtz iterative equation program
上傳時間： 2016-04-03
上傳用戶：杜瑩12345
The program md.f implements a simple molecular dynamics simulation in continuous real space. The velocity Verlet algorithm is used to implement the time stepping. The force and energy computations are performed in parallel, as is the time integration. (The program uses some Fortran90 features, so an F90 compiler may be needed.)
標簽： implements continuous simulation The
上傳時間： 2016-04-03
上傳用戶：zhaiye
