Name
Kreymer Aleksey Semenovich
Scholastic degree
•
Academic rank
—
Honorary rank
—
Organization, job position
Kuban State Agrarian University
Web site url
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Articles count: 12
Influence of circuit and constructive signs of stator and rotor windings on parameters and operational properties of asynchronous generators is examined
Influence of circuit and constructive signs of stator and rotor windings on parameters and operational properties of asynchronous generators is examined
Demands to power sources of a welding arc and the results of development of such supplies are considered
Increasing of the number of consumers using the advancements in technology search and delivery of scientific information, creates a need for institutional repositories that manage, preserve and maintain digital assets and intellectual products, as well as multiply the speed and convenience of obtaining the necessary information
In poultry industry, animal breeding, greenhouses and
vegetable stores a significant amount of fans with
asynchronous motors is used to create a microclimate.
The fan speed of the fan should be regulated in order
to improve the efficiency, so the multispeed motors are
used for the fan drives. Line produced two-speed motors
with a proportion of the poles number 1:2 have a
polar-switched Dahlander stator winding. Two-speed
motors with a proportion of the poles number 3:2 and
4:3 have only one stator winding which is poleswitched
by the method of amplitude phase shift keying.
A drawback of the windings is that they have different
energy indicators at different spin rates. In order
to create rational diagrams with switching according to
the number of poles, which is multiple of three, it is
proposed to implement a polyphase MMF modulation
of the three-phase winding. As a result of the study,
there were procured the stator windings at 4 and 6
poles, which enabled to change the spin speed of the
motor in the fan drives without breaking the drive
power circuit by the scheme Δ / ΥΥ
System integration, as a kind of information
technology, ensures that a range of services aimed at
the implementation of integration tasks and divided
into several types, including: horizontal, vertical,
distributed and core data format. In addition, this type
of activity has a number of different implementation
methods and occupies a significant share of the IT
market, having a great set of tools of the organization,
allowing optimizing the performance of the tasks by
optimizing the processes of project management and
control, performed by various information systems.
The lack of industry tools to consolidate the
functionality involved in the full cycle of project
implementation in the sphere is an important omission,
adversely affecting the speed and quality of
implementation of tasks. In this regard, there is need
for a new approach to the automation of processes, and
ensure information activities aimed at the solution of
problems on the integration of information systems
and their components, from the stage of task definition
and ending with a commercial operation stage with
further lifecycle support
The schemes of the stator winding with double-wide-phase zone, allowing limiting the level of inrush current of induction motors without breaking the circuit power are presented in the article
Due to the recommendation of the World Health
Organization, the standard rate of vegetables
consumption for a person per year is 130-150 kg,
including up to 15 kg of fresh production during the
off-season. To meet these standards in Russia, the
construction of greenhouses and greenhouse
complexes was sped up. To cultivate the bulk of
vegetables in the conditions of protected soil we have
mostly used winter greenhouses. At the same time, in
terms of the climatic conditions, the main production
costs are accounted for energy carriers (up to 60 –
70%). The main consumers of energy in greenhouses
are plants’ lighting and creation of the required
temperature conditions for plants and soil. Annual
increase of rates for energy carriers affects the cost of
the greenhouses’ production. To increase the energy
efficiency and independence in greenhouse complexes,
it is proposed to use installations based on gas
reciprocating units (GRU) for the production of two
types of energy – electric and thermal. Such
installations can run on the natural gas and other types
of fuel. The drawback of existing installations is that
they are mainly produced abroad or consist of the
foreign components. As an alternative, we offer new
technical solutions, which were developed and
patented in the Russian Federation. What makes these
solutions original is that asynchronous generators in
the installations are used with various control schemes
The control system of relationship between enterprises
and customers (CRM) is one of the important components
of an automated enterprise management system.
For construction organizations there is a need in CRM
architecture, providing linking of basic system objects
(documents, artists, clients, events) to the company's
projects. The most important trend in the development
of such systems is the use of cloud technologies. Using
the hybrid cloud technology provides a flexible and
controlled access to resources and high availability.
Internal accounting systems are implemented in the
private sector of a hybrid cloud, CRM and web interfaces
are placed in the public section. The implementation
of the synchronization data module in the public
part of a hybrid cloud over HTTPS ensures the security
and confidentiality of the transmission