Medium–Large induction machines
Medium–Large induction machines
... direct-online, single-cage induction motor are typically specified to be four to seven times the rated motor currents (4–7 p.u.) [1] These figures are for medium–large induction motors, whereas ... saturation is due to 2-D effects, which would be dominant for machines having a high aspect ratio (long machines with a low shaft height) and/or for machines havInterpretation of Differ...
Ngày tải lên: 26/11/2015, 09:41
Tài liệu Induction Machines pptx
... This is the normal operating state of a slip-ring induction machine The second type of induction machines are so-called squirrel-cage induction machines Rotor winding is in this case cast into ... exclusively by electromagnetic induction; therefore asynchronous machines are called induction machines End ring Rotor winding bars Fig – Squirrel-cage winding of a squirrel cage i...
Ngày tải lên: 23/01/2014, 06:20
electric machine Chapter 6 Polyphase Induction Machines
... rotor resistance 6. 2 Currents and Fluxes in Polyphase Induction Machines 6. 3 Induction- Motor Equivalent Circuit Only machines with symmetric polyphase windings exited by balanced polyphase voltages ... Tmech − Trot ωs = ωm (6. 24) (6. 25) (6. 26) (6. 27) (6. 28) Figure 6. 11 Equivalent circuits with the core-loss resistance Rc neglected corresponding to (a) Fig 6. 9 and (b)...
Ngày tải lên: 14/02/2014, 16:37
Chapter 6 symmetrical induction machines
... 220 460 2300 2300 1710 1705 1773 17 86 11.9 198 1.98 × 103 8.9 × 103 5.8 46. 8 93 .6 421.2 0.435 0.087 0. 262 0.029 0.754 0.302 1.2 06 0.2 26 26. 13 13.08 56. 02 13.04 0.754 0.302 1.2 06 0.2 26 0.8 16 0.228 ... 2⎞ pWm = −Te ⎜ ⎟ pθ r ⎝ P⎠ (6. 6-11) Therefore, (6. 6 -6) can be written as ⎛ 2⎞ ⎛ 2⎞ ⎜ ⎟ pWe = pW f + Te ⎜ ⎟ pθ r ⎝ 3⎠ ⎝ P⎠ (6. 6-12) If we compare (6. 6-12) with (6. 6-8), and...
Ngày tải lên: 16/02/2014, 18:47
Chapter 9 unbalanced operation and single phase induction machines
... (9. 5-21)– (9. 5-23) and solving the result for νng yields 350 UNBALANCED OPERATION AND SINGLE- PHASE INDUCTION MACHINES vng = 1 (egb + egc ) + vas 2 (9. 5-24) Substituting (9. 5-24) into (9. 5-22) and (9. 5-23) ... (9. 5-8)– (9. 5-10), and we have vng = − ias z( p) (9. 5-11) 348 UNBALANCED OPERATION AND SINGLE- PHASE INDUCTION MACHINES Equation (9. 5-11) is va...
Ngày tải lên: 16/02/2014, 18:48
VCM 2012 11 Đề xuất phương pháp kích từ cho máy phát đồng trục sử dụng máy điện dị bộ nguồn kép trong trạm phát điện tàu thủy A novel excitation method for shaft generators using doublyfed induction machines on power –station on shipboards
... số máy điện Ví dụ: R điện trở máy điện 1, L điện cảm máy điện Theo [3], phương trình mô tả máy điện dị nguồn kép hệ t a độ t a theo điện áp lưới, ứng dụng cho máy điện có hệ phương trình sau: ... trùng tần số điện áp máy phát với điện áp lưới điện: ta thấy th a mãn (theo phần 1) Giải vấn đề trùng pha điện áp máy phát điện áp lưới...
Ngày tải lên: 25/07/2015, 07:26
Báo cáo khoa học: "Large-Scale Induction and Evaluation of Lexical Resources from the Penn-II Treebank" potx
... over the left (the prefix) and the right (suffix) context of the head for each syntactic category occurring as the mother node of such heads To give a simple example, the rightmost NP to the left of ... name”) The value of the :cs feature is the constituent structure of the subcategorisation frame, which lists the syntactic CF-PSG constituents in sequence The...
Ngày tải lên: 17/03/2014, 06:20
Báo cáo y học: " Induction of the HIV-1 Tat co-factor cyclin T1 during monocyte differentiation is required for the regulated expression of a large portion of cellular mRNAs" pptx
... manuscript YW and XQ constructed and characterized the HIV-1 viruses and lentiviral vectors used in the study CS performed the analysis of DNA microarray data and performed the statistical analysis AR ... protocol (Promega), and the products were measured by a luminometer (Turner) Microarray analysis Microarray analysis was performed by the Baylor Microarray Core Facility (B...
Ngày tải lên: 13/08/2014, 09:20
Study on corporate governance index of Vietnam commercial bank – the case of a newly established, medium to large joint stock commercial ban
... influenced by the management style of a market economy after privatization The bank is a medium to large joint stock commercial banks in Vietnam For these reasons, corporate governance of the bank is ... out of 44 Vietnam banks - Its performance (ROA) ranked among top 20 banks Secondary information and data of the bank includes the bank annual...
Ngày tải lên: 02/01/2015, 17:33
Báo cáo y học: " Induction and effector phase of allergic lung inflammation is independent of CCL21/CCL19 and LT-beta
... initiation and effector phase of allergic lung inflammation is independent of LTβ and CCL21 Materials and Methods Mice LTβ knockout mice (“LTβ-KO”) backcrossed to C57BL/6 were kindly provided by Dr ... in the absence of secondary lymphoid tissue (in LTα knockout mice [40]) Thus, allergic lung inflammation can be generated independently of organized secondary...
Ngày tải lên: 03/11/2012, 11:24
Báo cáo y học: "Sustained High Quality of Life in a 5-Year Long Term Follow-up after Successful Ablation for Supra-Ventricular Tachycardia. Results from a large Retrospective Patient Cohort"
... EAT patients Panel A: Quantity and duration of episodes and the associated symptoms Panel B: Detraction in daily life generally and in parts of daily life variable PANAL A Detraction in daily life ... (Years) All patients AVNRT AVRT EAT From symptom to ablation (Years) All patients AVNRT AVRT EAT RF-Applications (Number) All patients AVNRT AVRT EAT Examination time (Min...
Ngày tải lên: 03/11/2012, 11:44
BT 3 optimization of medium for indole 3 acetic acid production using pantoea agglomerans strain PVM
... Biosynthesis of indole -3- acetic acid (a) Enterobacter sp DHM-1T (FJ74 530 0·1) Enterobacter sp R4M-Q (GQ478271·1) Pantoea agglomerans strain P29 (DQ3569 03 1) Pantoea agglomerans strain PVM (GU929212·1) Pantoea ... concerned with the IAA production potential of P agglomerans strain PVM, optimization of 1240 medium components and in vitro root induction...
Ngày tải lên: 06/08/2013, 21:06
MUTAGENIC INDUCTION OF AGRONOMICAL AND YIELD CONTRIBUTING TRAITS IN SOYBEAN (GLYCINE MAX (L.) MERRILL) WITH GAMMA IRRADIATION
... plant height with early branching in ĐT12; B no branching in ĐVN6 581 Mutagenic induction of agronomical and yield contributing traits in soybean (Glycine max (L.) Merrill) with gamma irradiation ... 0.7 579 Mutagenic induction of agronomical and yield contributing traits in soybean (Glycine max (L.) Merrill) with...
Ngày tải lên: 29/08/2013, 08:14