speed control methods of 3 phase induction motor ppt

... designed to control a brush-less DC motor. However, by constructing a feedback loop that can detect the outputs of an induction motor, we can use this motor controller to control an induction ... the induction motor s many advantages are clearly explained. Wildi also presents the two types of induction motors: “the squirrel cage induction motor and the “wound motor . An explanation of ... Design………………………………. 9 3. 1. The basic control format…………………………… 9 3. 2. The existing motor controller……………………… 10 3. 3. Current sensing module……………………………… 11 3. 4. The speed sensor……………………………………...

Ngày tải lên: 27/10/2013, 23:15

Ngày tải lên: 17/12/2013, 18:06

... 6,57 7,75 6, 73 5,56 - Experiment * 6,0 12 ,3 19,2 29,0 33 ,0 Analysis 6,5 13, 4 21,0 31 ,6 - 20%TiO 2 + 20%W800 + 60% AKAVINA polyester (sample type B) Error % 8 ,33 8,94 9 ,30 8,96 - Note: ... )            =+       ∂∂ ∂ + + ∂ ∂ + ∂ ∂ − ∂∂ ∂ ++ ∂ ∂ =+       ∂∂ ∂ + + ∂ ∂ + ∂ ∂ − ∂∂ ∂ ++ ∂ ∂ −= ∂ ∂ + ∂ ∂ 0 12 2 0 12 2 2 2 55 1 2 2 44 2 2 44 1 32 3 ,1 3 3 2 2 44 1 2 2 55 2 2 55 1 32 3 ,1 3 3 2 ψ ψψψ ϕ ϕϕϕ ψϕ I yxA DD xA D yA D I hyx w DD y w D I yxA DD yA D xA D I hyx w DD x w D hI z yx xyxyy yxy xyxyy yxx (3) ... bending deflection 3- phase composite Concentrate force Deflection (mm) 1kN 3kN 6kN 10kN Ultimate deflection Experiment * 7,6 14,2 20,8 32 ,4 34 ,3 Analysis 8,1 15 ,3 22,2 34 ,2 - 10%TiO 2 ...

Ngày tải lên: 14/03/2014, 13:20

Ngày tải lên: 21/07/2014, 16:21

... F-score ABL-leaf 5K / 30 K 16.8% 8.1% 10.9% 7.0K / 34 K 21.0% 11.2% 14.6% ABL-first 11K / 125K 9.2% 18.2% 12.2% 12.6K / 123K 10 .3% 20.0% 13. 6% Adios 2.7K / 24K 11.2% 4 .3% 6 .3% 2.2K / 20K 11.0% 3. 5% 5 .3% Emile ... 4.4K / 119K 3. 6% 6.9% 4.8% Random 11K / 93K 11.7% 17 .3% 14.0% ABL-leaf 4.0K / 24K 16.9% 6.4% 9 .3% ABL-first 13K / 113K 11.6% 20.8% 14.9% Adios 31 9 / 11K 2.8% 0.5% 0.9% Emile 912 / 5.2K 17 .3% 1.5% ... source of insight into universal grammar. Computational Linguistics, 43: 1– 34 . Andrei Mikheev. 1997. Automatic rule induction for unknown-word guessing. Computational Linguistics, 23( 3):405–4 23. Andrew...

Ngày tải lên: 20/02/2014, 12:20

Ngày tải lên: 18/12/2013, 22:06

... [6] 1112 233 445566 25566112 233 44 33 34455661122 466554 433 2211 5221166554 433 64 433 22116655 766 633 333 3666 8222555555222 9444111111444 106666 633 333 36 11222225555552 12444441111114 133 66666 633 333 14522222255555 15144444411111 1 633 366666 633 3 17555222222555 18111444444111 1 933 333 66666 63 20555552222225 21111114444441 22 633 333 366666 232 55555522222 24411111144444 25000000000000 26000000000000 27000000000000 60° 120° 180° ... current 112 233 4455661 234 45566112 23 3566112 233 445 4166554 433 221 532 21166554 43 654 433 2211665 7114444441111 8111111444444 9444411111144 10225555552222 11222222555555 12555522222255 133 366666 633 33 1 433 333 3666666 15666 633 333 366 16441111114444 17444444111111 18111144444411 19552222225555 20555555222222 21222255555522 226 633 333 36666 236 6666 633 333 3 2 433 336 6666 633 25000000000000 26000000000000 27000000000000 1 23 4 56 60° Mode v a 120° 180° 240° 30 0° 36 0° v b v c v ac v ca v ab v ba v bc v cb v o Figure ... current 112 233 4455661 234 45566112 23 3566112 233 445 4166554 433 221 532 21166554 43 654 433 2211665 7114444441111 8111111444444 9444411111144 10225555552222 11222222555555 12555522222255 133 366666 633 33 1 433 333 3666666 15666 633 333 366 16441111114444 17444444111111 18111144444411 19552222225555 20555555222222 21222255555522 226 633 333 36666 236 6666 633 333 3 2 433 336 6666 633 25000000000000 26000000000000 27000000000000 1 23 4 56 60° Mode v a 120° 180° 240° 30 0° 36 0° v b v c v ac v ca v ab v ba v bc v cb v o Figure...

Ngày tải lên: 13/05/2014, 00:55

Ngày tải lên: 15/10/2013, 16:10

... Thêm R add nối tiếp cuộn dây phần ứng Example 1: Example 2: Example 3: nh lut Bio-Savart: nh lut Faraday: ( ) BlIeF r r r ì= () l.Bve r r r ì= ...

Ngày tải lên: 17/12/2013, 14:15

Ngày tải lên: 18/12/2013, 09:10

... new Windows Server 20 03 root ACL. Notice that this template can also be used to apply similar settings to the root of other disks. Figure 9.10: Windows Server 20 03 built-in local security ... Server 20 03 allows administrators to centrally manage, configure, and push security policy and other administrative settings to an entire site, domain, or organizational unit. Policies, officially ... default settings. Therefore, if you need to preserve your changes, create a copy of the default template(s), introduce officially approved changes into it, and maintain these copies as well as default...

Ngày tải lên: 21/01/2014, 04:20

... ++ = ++ F H G I K J ++ F H G I K J = ì +ì+ì = ì ++ bgb g b gb b g b g 2 2 5 23 4 5 6 836 3 10 6 33 34 10 2 6 036 10 6 836 3 10 4 11 632 9 3 g A block diagram for this open-loop system is shown below: ... Furthermore, the control of AC actuators was a difficult task at that time. Today, AC motors are also widely used as servo-motors, employing modern methods of phase- voltage control and frequency control ... angular speed ω c . Mechatronics Kevin Craig DC Motor / Tachometer Closed-Loop Speed Control System 12 7. Control Design The objective of the exercise is to control the angular speed of the...

Ngày tải lên: 25/01/2014, 13:20

... tag-binding site. (B) The result of GLGI is conversion of 14 nucleotides of SAGE tag to a hundred bases of 3 cDNA fragment. This gure is reproduced from [34 ]. Fig. 2. Schematic of the high-throughput GLGI ... Cancer 33 , 252261. 33 van den Berg A, van der Leij J & Poppema S (1999) Serial analysis of gene expression: rapid RT-PCR analysis of unknown SAGE tags. Nucleic Acids Res 27, e17. 34 Chen ... lLofH 2 O, 15 lLof2m NaClO 4 , and 38 lL of 2-propanol. Precipitation mixture III: 64 lL of a 100% ethanol ⁄ 3 m NaAc mixture (25 : 1), 1 lL of glycogen (20 mgặmL )1 ; Roche), and 10 lLofH 2 O. Master...

Ngày tải lên: 07/03/2014, 00:20

... of pregnancy FEBS Journal 274 (2007) 33 5 133 62 ê 2007 The Authors Journal compilation ê 2007 FEBS 33 53 Acknowledgements Supported in part by a grant CA 935 42-2 from NIH, a grant DAMD17-01-1- 035 3 ... differentiation effect of pregnancy Y. E. Liu et al. 33 52 FEBS Journal 274 (2007) 33 5 133 62 ê 2007 The Authors Journal compilation ê 2007 FEBS Induction of accumulation of DPA and EPA to mammary ... differentiation effect of pregnancy Y. E. Liu et al. 33 56 FEBS Journal 274 (2007) 33 5 133 62 ê 2007 The Authors Journal compilation ê 2007 FEBS ratio 1 includes a wider range of n-6 and n -3 fatty acids...

Ngày tải lên: 16/03/2014, 10:20

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Ngày tải lên: 12/08/2014, 02:20

Ngày tải lên: 13/08/2014, 16:21