wyszukanych pozycji: 4
Development of Modified PWM Technique
ISBN: 9783659482595 / Angielski / Miękka / 2014 / 164 str. Termin realizacji zamówienia: ok. 13-18 dni roboczych. This book focuses on the torque improvement of the PM BLDC motors by minimizing the generated torque ripples. An extensive review of the applied torque ripple minimization techniques is presented. The torque ripples in BLDC motor drives usually originate from the motor design structure, as well as from the drive side in the forms of current ripples. The torque ripples from the control side appear in the forms of spikes and dips on the output torque which is inherently due to the phase current mismatch during phase current commutation. Practically, the rate of current rise and decay between...
This book focuses on the torque improvement of the PM BLDC motors by minimizing the generated torque ripples. An extensive review of the applied torqu...
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cena:
372,57 zł |
Prospective and Design of Thermo Electric Cooling Applications
ISBN: 9783659416675 / Angielski / Miękka / 2013 / 108 str. Termin realizacji zamówienia: ok. 13-18 dni roboczych. This book presents the design of a transformer-less converter for low power applications based on CUK topology which is basically a combination of buck and boost topologies. This topology is principled on dividing the input voltage into storage devices as charging state then delivering the stored energy to the load at the discharging state. This process operated at high speed to ensure continuous conduction of load current. The converter converts input DC voltage throughout multistage voltage chopping. The transfer of energy through the capacitive elements ensures that the load current is...
This book presents the design of a transformer-less converter for low power applications based on CUK topology which is basically a combination of buc...
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cena:
284,48 zł |
The Adaptation Process of a Resettled Community to the Newly-Built Environment A Study of the Nubian Experience in Egypt
ISBN: 9781612334233 / Angielski / Miękka / 2014 / 484 str. Termin realizacji zamówienia: ok. 13-18 dni roboczych. Generally, construction of dams is regarded as means of economic progress in many countries. Major consequences of such projects are the inundation of upstream areas and the resettlement of entire communities in newly-built environments where they experience dramatic transformation in their lifestyles. The present study takes the Nubian resettlement experience after the creation of Lake Nasser that submerged their old settlements, along the river Nile. Following their resettlement, the design of the newly-built environment disrupted the Nubian traditional lifestyles and patterns of privacy...
Generally, construction of dams is regarded as means of economic progress in many countries. Major consequences of such projects are the inundation of...
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cena:
187,74 zł |
Rehabilitation of Cairo's Historical Districts
ISBN: 9783659127182 / Angielski / Miękka / 2012 / 112 str. Termin realizacji zamówienia: ok. 13-18 dni roboczych. This book considers the socio-cultural and economic dynamics of historical conservation with respect to what is sometimes called 'Islamic Cairo'. It aims to re-assess and to challenge the upgrading and modi cation processes recently affecting the urban and social fabric of Cairo's Historical City. Further, the study seeks to incorporate the district's cultural diversity in the city's future urban development. Despite the availability of the 1980 UNESCO Plan and the 1997 UNDP Plan for Historical Cairo's rehabilitation, government policies remain insufficient and fragmentary with a tendency to...
This book considers the socio-cultural and economic dynamics of historical conservation with respect to what is sometimes called 'Islamic Cairo'. It a...
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cena:
253,91 zł |