Topic 3 three phase motor protection devices

... Three- Phase Connections Three- Phase STAR Connection Three- Phase Connections: STAR 20/02/17 Nathan Condie Three- Phase Connections: STAR  Formed by connecting the three similar ends ... Condie 11 UEENEEG002B Solve problems in single and three- phase low voltage circuits Topic 6: Three- Phase DELTA Connections Three- Phase Connections: DELTA  Fo...

Ngày tải lên: 20/02/2017, 12:54

... Three- Phase, Four- Wire Systems     A three- phase, four- wire system consists of three ACTIVE conductors plus a NEUTRAL conductor (note: ... 20/02/17 Nathan Condie Neutral Current Exercises  20/02/17 Complete the exercises on three- phase, four- wire systems (calculating neutral current) Nathan Condie Neutral Current Exercise  Exercise ... IN 5) Phase angle ØN...

Ngày tải lên: 20/02/2017, 13:04

... processes and variables are modelled mathematically Furthermore, the MATLAB program can convert a MATLAB design into a C-code design in a relatively straightforward manner Hence, this stage of the ... two-phase currents to generate a means of instantaneously controlling the torque and flux Field-orientated controllers require control of both magnitude and phase of...

Ngày tải lên: 27/10/2013, 23:15

... 30 3 -39 7-2295 60909- 3 IEC: 20 03 11 SHORT- CIRCUIT CURRENTS IN THREE- PHASE AC SYSTEMS Part 3: Currents during two separate simultaneous line-to-earth short circuits and partial short- circuit currents ... COURANT ALTERNATIF 60909- 3 IEC: 20 03 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ SHORT- CIRCUIT CURRENTS IN THREE- PHASE AC SYSTEMS P...

Ngày tải lên: 04/04/2014, 11:58

... +12V -1 2V VR 2.5 DT4 3k3 2k 10k 1k 1.5 4148 CD4528 -1 2V 22j 63 33k 1k 1k 3k3 2k 10k 1k DN9 10k +12V Hình 2 .3 Sơ đồ nguyên lý mạch tạo xung điều khiển đồng kép pha III HỆ THỐNG CHỈNH LƯU KÉP 3. 1 ... 4007 DN7 DN8 1k 1.6 4148 1k DT5 -1 2V 2 .3 13 22j 63 TL082 1k5 + 22j 63 33k 4148 - C1815 C1815 1k 3k3 2k 10k 100k 10k 4148 CD4528 -1 2V 22j 63 D1 1 .3 4148 10 12 1k...

Ngày tải lên: 18/03/2016, 05:21

... requirement toward new job – seekers? - Need global skills: foreign language, computer skill - Ability for teamworking - Technique for applying for a job: dynamic, interview skill - Ability to earn ... this idea? 11 Some people prefer to work for themselves or own a business Others prefer to work for an employer Would you rather be selfemployed, work for someone else, or own a bus...

Ngày tải lên: 15/12/2013, 12:15

... Some people want a center for business research Other people want a center for research in agriculture (farming) Which of these two kinds of research centers you recommend for your country? Use specific ... means of electronic information transmission - Businessmen would get richer For the rest of the country’s people, there might be little obvious benefit What can research center fo...

Ngày tải lên: 15/12/2013, 12:15

... KRONE HIGHBANDTM Arrestor Magazine Pole Equipped Overvoltage Protection for HIGHBAND 10 Product Description and Application Part Numbers: Overvoltage Arrestor Magazine made to suit HIGHBAND ... contact: KRONE (Australia) TECHNIQUE PTY LTD PO Box 33 5 Wyong NSW 2259 Hereford Street Berkeley Vale NSW 2261 Tel: 02 438 8 4422 Fax: 02 438 8 4499 Email: kronehlp @kro...

Ngày tải lên: 21/12/2013, 18:15

... allowscriptaccess="none" height="1" width="1"> Thursday November 30, 2006 - 09:58pm (ICT) Permanent Link | Comments Chinh phục Yahoo blog. Topic 2: Nâng cấp blog ... bạn muốn thay đổi background việc kiếm hình đẹp, up lên hosting image (Việc up hình lên bạn đọc hướng dẫn Topic nhé) Sau bạn copy URL hình bạn vừa up lên Ví dụ photobucket bạn chọn URL hình 3.1 ... width="1...

Ngày tải lên: 21/12/2013, 21:15

... 1,3,5 0 2,4,6 Table Phase voltage space vectors State Phase voltage space vectors 12/ 3) Vdc / (101) Figure Phase voltage space vectors -(2/3) VdC '(100) Real (001) Table Phase voltage values for ... voltage and the resulting filtered leg and phase voltages are shown in Figs and CONCLUSIONS This section details the step by step development of Matlab/ Simulink model fo...

Ngày tải lên: 24/12/2013, 11:32

... output voltage variation is very limited (5 2%) and both a fast recovery of the rated DC voltage and the accurate input currents tracking are obtained Finally the control has been tested for a reference ... proposed CC- PWM AC/ DC actual power factor PF and can be much smaller than the theoretical one, computed for PF= This behaviour can be recognised in Fig that shows the system...

Ngày tải lên: 03/01/2014, 19:44

... KataokaT 1996, nt -type PWM rectifier with active filtering function" , IEEJ SPC- 96 (107), 11-20 ( in Japanese) KataokaT, Murota 1, Fuse Y, Nakajima D and Nishikata S 1999, A Single -phase Voltage- Type ... forphase v which is given by (11) can also be obtained in the same manner as that explained above for phase U EXPERIMENTAL INVESTIGATION To confirm the operation of...

Ngày tải lên: 03/01/2014, 19:44

... KAZMIERKOWSKI AND MALESANI: CC TECHNIQUES FOR THREE- PHASE VS -PWM CONVERTERS While phase voltages can be controlled independently, phase currents are determined not only by their own phase voltage, ... Novotny and T A Lipo, Vector Control and Dynamics of AC Drives Oxford, U.K.: Clarendon, 1996 [18] S Ogasawara, H Akagi, and A Nabae, A novel PWM scheme of voltage...

Ngày tải lên: 03/01/2014, 19:45