Name
Grigorash Oleg Vladimirovich
Scholastic degree
•
Academic rank
professor
Honorary rank
—
Organization, job position
Kuban State Agrarian University
Web site url
—
Articles count: 65
The article discusses structural schematics power circuits and voltage stabilization systems of converters with improved operational and technical characteristics
The article discusses the new structural schematics and features of the DC voltage source with improved operational and technical characteristics
The article reveals the basic principle of stabilizing
the DC voltage, providing automatic control of
electrical devices and electrical equipment, control
systems, control and protection, etc. There are
functional diagrams (operated and promising) of DC
voltage stabilization with a device included in the
input and output power circuits of the rectifier, and a
new structural solution to a functional circuit of the
rectifier made of two controllable power electronic
devices and transformer with midpoint. The article
lists peculiarities of the circuits of the voltage
regulators and their main advantages and
disadvantages. We have reviewed functional
diagrams of existing and new solutions of the
stabilizers and the characteristics of their work; it
will increase the effectiveness of pre-project works
on the development of stabilizers of the DC voltage
with improved performance characteristics. This
article might be useful for post-graduates and
research workers who are involved in the
development of DC voltage stabilizers
The article examines various aspects of distance learning in higher professional education system
Modern universities do not have effective
techniques for evaluating the quality of education
of students and effectiveness of teachers' activity
that allows controlling and directing its activities.
We have proposed to perform the quality evaluation
of students preparation based on the results of
intermediate assessments, examinations, and test
results of the teachers, who held their classes. The
article provides analytical expressions for
calculating the quality of the current preparation of
students and the quality of education of graduates,
the effectiveness of teachers in core activities
(educational, methodical and scientific work). In
assessing the quality of education, we have
considered the learning outcomes, employment
potential, i.e. educational and labor activity. The
proposed techniques will increase the objectivity of
the assessment of the quality of graduates’
education in technical universities and the
effectiveness of teachers. This will allow us to
make changes in the organization of educational
process and the content of working programs of
training, educational and methodical and material
and technical support, to change the contents and
technologies of improvement of qualification of the
teaching staff that will contribute to increase
demand for graduates in the labor market
The article describes the basic forms and teaching methods of forming organizational abilities of students - of future leaders - during the educational activities at the university
In the autonomous power supply systems there are
widely used frequency converters that are able to
simultaneously increase or decrease the frequency of
the current and voltage stabilizing power supply.
These positive properties of frequency converters can
improve the operational and technical characteristics
of the autonomous power supply system in the
complex. The article suggests a functional diagram of
a frequency converter performed on reversible
rectifiers. We have presented timing diagrams
illustrating the principle of its operation. The article
also deals with two functional scheme of direct
frequency converters executed on single-phase, threephase
transformer with a rotating magnetic field. The
principle of operation of these schemes has been also
discussed in the timing diagrams. The proposed
technical solutions for frequency converters contain a
smaller amount of power electronic devices that make
it possible, thereby reducing the level of
electromagnetic interference, increase the efficiency
and reliability of performance inverters. The
considered scheme of frequency converters, can
improve the technical characteristics of the
autonomous power supply systems in the complex. We
can significantly improve the performance of power
systems through the use of modular aggregating
principle of the basic functional units of an
autonomous system
This article discusses current approaches to organizational and methodological work aimed at improving the performance of the core activities of the department
The article suggests organizational measures aimed at improving the system of higher education that will improve the quality of university graduates
The article presents a package of measures of organization and methodological work at the department oriented to improving the qualifications of the teaching staff