Powerful sources of pulse high-frequency electromechanical transducers for measurement, testing and diagnostics
Aim. Development of powerful current radio pulses generators (CRPG) for powering high-frequency electromechanical transducers based on IGBT transistors. Methodology. To carry out the research, the statements of the magnetic and electromagnetic fields interaction with electric and ferromagnetic mat...
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| Опубліковано в: : | Електротехніка і електромеханіка |
|---|---|
| Дата: | 2018 |
| Автори: | , , , , , |
| Формат: | Стаття |
| Мова: | Англійська |
| Опубліковано: |
Інститут технічних проблем магнетизму НАН України
2018
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| Онлайн доступ: | https://nasplib.isofts.kiev.ua/handle/123456789/149332 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Powerful sources of pulse high-frequency electromechanical transducers for measurement, testing and diagnostics / S.Yu. Plesnetsov, O.N. Petrishchev, R.P. Mygushchenko, G.M. Suchkov, S.V. Sotnik, O.Yu. Kropachek // Електротехніка і електромеханіка. — 2018. — № 2. — С. 31-35. — Бібліогр.: 12 назв. — англ. |
Репозитарії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| _version_ | 1859837031975223296 |
|---|---|
| author | Plesnetsov, S.Yu. Petrishchev, O.N. Mygushchenko, R.P. Suchkov, G.M. Sotnik, S.V. Kropachek, O.Yu. |
| author_facet | Plesnetsov, S.Yu. Petrishchev, O.N. Mygushchenko, R.P. Suchkov, G.M. Sotnik, S.V. Kropachek, O.Yu. |
| citation_txt | Powerful sources of pulse high-frequency electromechanical transducers for measurement, testing and diagnostics / S.Yu. Plesnetsov, O.N. Petrishchev, R.P. Mygushchenko, G.M. Suchkov, S.V. Sotnik, O.Yu. Kropachek // Електротехніка і електромеханіка. — 2018. — № 2. — С. 31-35. — Бібліогр.: 12 назв. — англ. |
| collection | DSpace DC |
| container_title | Електротехніка і електромеханіка |
| description | Aim. Development of powerful current radio pulses generators (CRPG) for powering high-frequency electromechanical
transducers based on IGBT transistors. Methodology. To carry out the research, the statements of the magnetic and
electromagnetic fields interaction with electric and ferromagnetic material, electric circuits, structure of radio electronic devices
theory were used. Results. The main provisions for creating powerful broadband generators for powering electromechanical
transducers based on IGBT transistors are determined. It is shown that the generators intended for use in measurements, testing
and diagnostics should provide adjustment of the frequency and duration of the output current pulses, and also provide current in
the transducer inductor of several hundred amperes. The connection between the power frequency of the resonant
electromechanical transducer and the gap between the transducer and the surface of the metal being diagnosed is established. A
CRPG variant for powering electromechanical transducers in the frequency range 1 ... 3 MHz and the duration of current pulses
of 1 ... 20 periods of the filling frequency is developed and manufactured. The peak current in the inductor of a high-frequency
electromechanical transducer has reached 450 A. Novelty. For the first time, the possibility of using powerful IGBT transistors in
electronic devices working in a key mode in push-pull circuits for feeding high-frequency electromechanical transducers is
shown. Practical value. Using the results obtained will allow the creation of new instruments for measurement, control and
diagnostics with wider characteristics.
Цель работы. Разработка основных положений по созданию мощных источников импульсов тока для питания
высокочастотных электромеханических преобразователей для измерений, контроля и диагностики
электротехнических устройств на базе силовых IGBT транзисторов. Методика. Для проведения исследований
использовались положения теории взаимодействия магнитных и электромагнитных полей с электропроводным и
ферромагнитным материалом, электрических цепей, построения электронных устройств. Результаты. Определены
основные положения по созданию мощных широкополосных генераторов для питания электромеханических
преобразователей на базе силовых IGBT транзисторов. Показано, что генераторы, предназначенные для
использования в измерениях, контроле и диагностике, должны обеспечивать регулировку частоты и длительности
импульсов выходного тока, а также обеспечивать ток в катушке преобразователя величиной до 450 A. Установлена
связь между частотой питания резонансного электромеханического преобразователя и зазором между
преобразователем и поверхностью диагностируемого металла. Разработан и изготовлен вариант ИИТ для питания
электромеханических преобразователей в диапазоне частот 1…3 MHz и длительности импульсов тока 1…20
периодов частоты заполнения. Пиковая величина тока в катушке высокочастотного электромеханического
преобразователя достигла 450 A. Научная новизна. Впервые показана возможность применения силовых IGBT
транзисторов в электронных устройствах, при ключевом режиме работы в двухтактных схемах для питания
высокочастотных электромеханических преобразователей. Практическая значимость. Использование полученных
результатов позволит создавать новые приборы для измерений, контроля и диагностики с улучшенными
характеристиками.
|
| first_indexed | 2025-12-07T15:35:44Z |
| format | Article |
| fulltext |
ISSN 2074-272X. Електротехніка і Електромеханіка. 2018. №2 31
© S.Yu. Plesnetsov, O.N. Petrishchev, R.P. Mygushchenko, G.M. Suchkov, S.V. Sotnik, O.Yu. Kropachek
UDC 620.179.16: 620.179.17 doi: 10.20998/2074-272X.2018.2.05
S.Yu. Plesnetsov, O.N. Petrishchev, R.P. Mygushchenko, G.M. Suchkov, S.V. Sotnik, O.Yu. Kropachek
POWERFUL SOURCES OF PULSE HIGH-FREQUENCY ELECTROMECHANICAL
TRANSDUCERS FOR MEASUREMENT, TESTING AND DIAGNOSTICS
Aim. Development of powerful current radio pulses generators (CRPG) for powering high-frequency electromechanical
transducers based on IGBT transistors. Methodology. To carry out the research, the statements of the magnetic and
electromagnetic fields interaction with electric and ferromagnetic material, electric circuits, structure of radio electronic devices
theory were used. Results. The main provisions for creating powerful broadband generators for powering electromechanical
transducers based on IGBT transistors are determined. It is shown that the generators intended for use in measurements, testing
and diagnostics should provide adjustment of the frequency and duration of the output current pulses, and also provide current in
the transducer inductor of several hundred amperes. The connection between the power frequency of the resonant
electromechanical transducer and the gap between the transducer and the surface of the metal being diagnosed is established. A
CRPG variant for powering electromechanical transducers in the frequency range 1 ... 3 MHz and the duration of current pulses
of 1 ... 20 periods of the filling frequency is developed and manufactured. The peak current in the inductor of a high-frequency
electromechanical transducer has reached 450 A. Novelty. For the first time, the possibility of using powerful IGBT transistors in
electronic devices working in a key mode in push-pull circuits for feeding high-frequency electromechanical transducers is
shown. Practical value. Using the results obtained will allow the creation of new instruments for measurement, control and
diagnostics with wider characteristics. References 12, figures 6.
Key words: powerful transistors, radio pulse generator, electromagnetic field, conductive and ferromagnetic metal, high-
frequency current, inductor.
Цель работы. Разработка основных положений по созданию мощных источников импульсов тока для питания
высокочастотных электромеханических преобразователей для измерений, контроля и диагностики
электротехнических устройств на базе силовых IGBT транзисторов. Методика. Для проведения исследований
использовались положения теории взаимодействия магнитных и электромагнитных полей с электропроводным и
ферромагнитным материалом, электрических цепей, построения электронных устройств. Результаты. Определены
основные положения по созданию мощных широкополосных генераторов для питания электромеханических
преобразователей на базе силовых IGBT транзисторов. Показано, что генераторы, предназначенные для
использования в измерениях, контроле и диагностике, должны обеспечивать регулировку частоты и длительности
импульсов выходного тока, а также обеспечивать ток в катушке преобразователя величиной до 450 A. Установлена
связь между частотой питания резонансного электромеханического преобразователя и зазором между
преобразователем и поверхностью диагностируемого металла. Разработан и изготовлен вариант ИИТ для питания
электромеханических преобразователей в диапазоне частот 1…3 MHz и длительности импульсов тока 1…20
периодов частоты заполнения. Пиковая величина тока в катушке высокочастотного электромеханического
преобразователя достигла 450 A. Научная новизна. Впервые показана возможность применения силовых IGBT
транзисторов в электронных устройствах, при ключевом режиме работы в двухтактных схемах для питания
высокочастотных электромеханических преобразователей. Практическая значимость. Использование полученных
результатов позволит создавать новые приборы для измерений, контроля и диагностики с улучшенными
характеристиками. Библ. 12, рис. 6.
Ключевые слова: силовые транзисторы, генератор импульсов, электромагнитное поле, электропроводный и
ферромагнитный металл, высокочастотный ток, катушка индуктивности.
Introduction. Recently, there has been a growing
tendency to use pulse high-frequency electromechanical
transducers (PHFEMT) [1-4] for measurement, control
and diagnostics of electrically conductive and
ferromagnetic metal products. PHFEMT can transform
electromagnetic energy into high-frequency mechanical
(ultrasonic). This transformation is traditionally called
electromagnetic-acoustic (EMA) transformation. The
physical nature of EMA transformation can be explained
with the help of Fig. 1 (1 – the source of a constant
polarization field; 2 – high-frequency inductor; 3 –
product; 4 – power lines of a constant magnetic field; 5 –
field lines of high-frequency electromagnetic field; 6 –
vortex current in the surface skin layer of the product).
Conductors with flat inductor current are located in
parallel with the conductive or ferromagnetic metal
surface (OT – object of testing). The current layer has a
linear density I = I0e
jωt, which induces a current If = –I0
and creates a uniform magnetic field with the amplitude
Fig.1 The diagram explains the physical effects of
electromagnetic field transformation into high-frequency
mechanical (ultrasonic) oscillations
|H|I0, where 1j , ω – the current frequency in the
EMAT inductor. A constant polarization magnetic field
32 ISSN 2074-272X. Електротехніка і Електромеханіка. 2018. №2
with induction yx ByBxB 00 is applied to the surface
layer of the OT under the inductor. According to [5],
alternating stresses are formed in the surface skin layer of
the OT, due to the interaction of the magnetic and
electromagnetic fields. The total voltage Txx is written in
the form
21
1 ty
C
xx
M
xx
E
xxxx jHBTTTT
, (1)
where E
xxT – the stresses formed due to the
electrodynamic effect (Lorentz forces); M
xxT – voltages
formed due to magnetic interaction; C
xxT – the stresses
formed due to magnetostrictive effects; βt – generalized
parameter that is equal to the ratio of the wave numbers of
mechanical and electromagnetic waves
0
2
2
t
t
c
;
H – the intensity of the alternating magnetic field; μ0– the
magnetic constant 4π·10–7 H/m; μ – the relative magnetic
permeability; ct – the propagation velocity of the high-
frequency elastic shear perturbation in the OT material;
ω – the frequency of high-frequency elastic mechanical
oscillations, which coincides with the frequency of the
high-frequency current in the EMA transducer’s inductor;
α – the magnetostrictive constant; 1j ; σ – electric
conductivity of the OT material.
Analysis of the equation (1) shows that the
magnitude of the mechanical variable stresses depends on
the induction of the polarization magnetic field and the
current magnitude in the inductor. When diagnosing
ferromagnetic materials, it is very difficult to generate an
induction value of the magnetic field in the excitation
zone of high-frequency mechanical oscillations of more
than 1 T. On the other hand, it is not advisable to
significantly increase the induction of the polarization
magnetic field, since the EMAT attractive force to the
ferromagnetic product will be significant. As a result, it is
difficult to scan the OT during diagnostics.
Pulse current in the EMAT inductor can
theoretically be increased without special restrictions up
to tens of kiloamperes, for example by means of
mechanical interrupters. However, it is impossible to use
such generators in devices, especially in small ones. In
addition, the problem arises when forming high-frequency
current pulses in the range from tenths to tens of MHz.
This problem can be solved by increasing the peak
power of current pulse sources (CPS) [6-11]. The authors
in [6, 7] propose to use powerful short unipolar pulses for
powering the PHFEMT, which are not difficult to obtain,
for example, with the help of thyristors. However, such
pulses have a wide frequency spectrum, which reduces
their efficiency at given values of diagnostic frequencies.
In articles [8-11], it is proposed to apply a pulse packet of
certain duration and with a specified filling frequency to
feed PHFEMT. In this case, the output voltage in the
device [8] does not exceed 300 V, which is unacceptable.
The generator [9] allows obtaining significant pulse
currents in the load. However, it is made on high-voltage
high-frequency electron tubes GMI-83, which require
cumbersome high-voltage power supplies. Such
generators consume a lot of electricity. The device is
dangerous for maintenance staff. The power sources given
in [10, 11] are more promising, but they do not allow
increasing the output power. Therefore, the development
of high power CPS is of great interest.
The aim of the paper is to develop the main
regulations for the creation of powerful current pulse
sources for feeding high-frequency electromechanical
transducers for measuring, monitoring and diagnostics of
electrical devices based on IGBT transistors.
Research and analysis of the developed results.
Analysis of known literature sources [1-11] allowed
formulating requirements for CPS, which should provide
EMAT feeding, for example, described in [1-4], in the
most constantly used frequency range. It should be
formed in EMAT with an input resistance from fractions
of up to several Ω current pulse packets with a filling
frequency from 1 to 3 MHz. The period’s number of the
pulse filling frequency should be adjustable in the range
1 ... 20 pcs. The maximum peak amplitude of the current
in the transducer conductors should reach several hundred
amperes. The repetition frequency of the probing pulses
should be regulated in the range from 0.01 to 1 kHz,
depending on the OT scanning speed.
The authors based on the analysis of the power
electronics elements characteristics came to the
conclusion that it is expedient to use powerful IGBT
transistors in the output stages. To test this assumption,
experimental studies were performed of the capabilities of
several modern powerful comparatively high-frequency
IGBT transistors at high frequencies. It is determined that
they do not allow creating a sinusoidal output signal. At
the same time, it is shown that in the claimed frequency
range, some IGBT transistor models switch with
sufficient time intervals in push-pull circuits.
To implement the developed technical solution, it is
proposed to form the CPS output pulse in the form of a
meander, and the sinusoidal component allocation is
carried out using the EMAT resonant circuit or a separate
filter. This approach makes it possible to provide an
acceptable thermal operating mode of the transistors,
especially at high probing frequencies, and to obtain
significant amounts of excited currents in the load. The
expediency of using parallel switching up to 5 transistors
in each arm of a push-pull circuit allows increasing the
current in the transducer or increasing the voltage due to
the use of high-frequency broadband transformers. The
pre-switches in front of the output stages must be
powerful enough to quickly fill the gate of the IGBT
transistors of the CPS output stage. To quickly switch off
the output transistors, the resistance of the pre-output
transistors in the open state should be minimal.
The expediency of manufacturing CPS in the form
of two main blocks – a signal generator with adjustable
parameters and a high-frequency broadband power
amplifier is specified.
On the basis of this approach CPS has been
developed, which allows fulfilling the requirements
necessary for feeding EMAT with modern monitoring,
measuring and diagnostic tools. As an example of such a
development Fig. 2 shows the electrical circuit diagram of
a high-power high-frequency broadband generator.
The signal generator with adjustable parameters is
made on a microprocessor U4 of the AT90S1200 type.
ISSN 2074-272X. Електротехніка і Електромеханіка. 2018. №2 33
P28
Pad
IRG4PC50F/TO
Q10
C23
C
U2
74AC245
2
3
4
5
6
7
8
9
19
1
18
17
16
15
14
13
12
11
A0
A1
A2
A3
A4
A5
A6
A7
OE
DIR
B0
B1
B2
B3
B4
B5
B6
B7
Q2
IRF710
P5
GND
bias
P33
Pad
C6
3.3u
P23Pad
vcc
P6 Pad
P37
Pad
P41Pad
R3
820
P14
Pad
P42
Pad
P2 Pad
T1
TRF 8:16:16
5 1
4
2 6
IRG4PC50F/TO
Q12
P7 Pad
R19
75
R21
R
R1 68
P9
PadP0.0
R7
3k
Start
C24
4.7u
P39
Pad
P34
Pad
R24
2.4
P44
Pad
Q1
IRF710
U5C
7414
5 6
P0.1
vcc
P26
Pad
R16
R
J1
CON10A
1 2
3 4
5 6
7 8
9 10
C3
100n
P25Pad
L1
1u
+ C17
CP
R10 R
P36
Pad
Q7
IRF540N/TO
C1
100n
R25
2.4
R4
9.1
P8
Pad
R14
R
R12 1
Reset
R15
R
R11
6.8k
3 1
2
P3 Pad
Reset
R8 51
U1
74AC245
2
3
4
5
6
7
8
9
19
1
18
17
16
15
14
13
12
11
A0
A1
A2
A3
A4
A5
A6
A7
OE
DIR
B0
B1
B2
B3
B4
B5
B6
B7
C28
910
C25
4.7u
J2
CONN PWR 4-P
1
2
3
4300 V
P11 Pad
P12
Pad
50 V
+ C22
CP
P38
Pad
C27
C
P22
Pad
P31
Pad
P45 VCC
300 V
P27
Pad
R13
R
+C7
10u
IRG4PC50F/TO
Q11
L2
1u
C13
C
P0.3
C18
100n
P0.1
P24Pad
U4 AT90S1200
1
4
5
20
12
13
14
15
16
17
18
19
2
3
6
7
8
9
11
RESET
XTAL2
XTAL1
VCC
PB0/AIN0
PB1/AIN1
PB2
PB3
PB4
PB5/MOSI
PB6/MISO
PB7/SCK
PD0
PD1
PD2/INTO
PD3
PD4/TO
PD5
PD6
P30
Pad
R9 1
U3
74AC245
2
3
4
5
6
7
8
9
19
1
18
17
16
15
14
13
12
11
A0
A1
A2
A3
A4
A5
A6
A7
OE
DIR
B0
B1
B2
B3
B4
B5
B6
B7
bias
U5B
7414
3 4
P35
Pad
50 V
R5
9.1
R6
240
P0.2
P10 Pad
R17
R
IRG4PC50F/TO
Q9
P29
Pad
vcc
P0.2 P16
Pad
P1 Pad
P32
Pad
Start
P0.0
P15
Pad
P0.3
Q8
IRF540N/TO
vcc
R2
22
C14
C
C2
100n
Fig. 2. Electric schematic diagram of CPS for feeding high-frequency electromechanical transducers
It forms two sequences of rectangular pulses IN1
and IN2 with an amplitude of 5V with a pulse ratio of 2
(meander) and the phase opposites that are required to
power the subsequent CPS stages. The frequency, pulse
ration and the number of pulses are controlled by the
buttons PQ0-PQ3 and Reset. Each of the two signals from
the microprocessor's output goes to the inputs of the
buffered repeaters U1 and U3, executed on the chips of
74AC245 type. Buffered repeaters are used to amplify the
current output signal, to provide steep edges, form
rectangular pulse sequences IN1 and IN2, and to protect
the microprocessor in case of short circuits in the
amplifier circuit. To increase the output current, 8 inputs
and 8 outputs of each buffered repeater are connected in
parallel. The time diagrams of the output signals
generators are shown in Fig. 3, where: T1 – the sequence
period of rectangular pulses; T2 – total duration of the
pulse packet; T3 – the interval period of pulse packet;
T4 – the duration of the bias pulse.
Fig. 3. Time diagram of the output signals generators
The outputs of the buffered repeaters U1 and U3 are
loaded on the input winding of the high-frequency
wideband transformer T1. From the transformer output
T1, rectangular pulses in antiphase go to the transistors
gates Q1 and Q2, switched on in a push-pull circuit.
Switching on transistors at the same time ensures the
sequential opening of only one of them and closing of the
other one. Simultaneously, a bias pulse is applied to the
middle point of the output winding of the transformer T1.
It comes from the microprocessor U4 through the buffer
U2 (74AC245), providing a rapid opening of the
transistors Q1 and Q2 and their subsequent closing after
ending the pulse packet. The duration of the bias pulse T4
is equal to the duration of the T2 packet.
From the outputs of transistors Q1 and Q2, square
wave pulses of the packet signal are fed to the input of a
high-frequency broadband transformer similar to T1 (not
shown in the diagram). Rectangular pulses from the
output of the second transformer go to the transistors
gates Q7 and Q8 (IRF540N), also included in the push-
pull circuit. The stage on transistors Q7 and Q8 serves to
amplify rectangular pulses in voltage and current
sufficient for the key output stage operation on IGBT
transistors Q9 and Q10, Q11 and Q12 (IRG4PC50F),
included in pairs in each arm of the push-pull circuit.
Parallel switching on two IGBT transistors in each arm
allowed increasing the limiting switching current and
reducing losses by lowering the resistance of the arm in
the open state. The output stage is connected to the
previous one using a broadband high-frequency
transformer similar to T1 (not shown in the diagram). The
output stage is also loaded on a broadband high-frequency
transformer (not shown in the diagram), which output is
connected to the EMAT, for example [1].
34 ISSN 2074-272X. Електротехніка і Електромеханіка. 2018. №2
Power units of the generator’s stages are not
shown in the diagram. To test the developed CPS
characteristics, tests were performed when it was
connected to the active load and when the EMAT load
was operating in a resonance mode.
Fig.4. Amplitude-frequency response of CPS with an active load
equal to 0.5 Ω
Fig. 4 shows the amplitude-frequency response of CPS
with an active load equal to 0.5 Ω in the frequency range
exceeding the range of 1 ... 3 MHz. The measurements were
performed using an oscilloscope SDS7202.
Data analysis (Fig. 4) shows that the amplitude-
frequency response of CPS in the frequency range
1 ... 3 MHz is close to uniform. This means that the use of
IGBT transistors in the switching mode in the output push-
pull stages allows covering the traditionally used frequency
range for measurements, monitoring and diagnostics. In this
case, the peak current in the active load exceeds 100 A.
Studying generator’s operation when connecting
resonant EMAT, the following procedure was used. The
high-frequency electromechanical transducer [1] was
mounted on a metal (high-carbon steel) with various gaps
between the inductor and the metal. The CPS frequency
controller fed EMAT into resonance. It is taken into
account that the basis of any EMAT is a high-frequency
inductor and that the inductance of this inductor is
different for different gaps. Consequently, the resonant
frequency of the transducer will also be different. This
position was confirmed by the data in Fig. 5, which
showed the amplitude-frequency response of CPS
together with EMAT resonant type. In this case, the high-
frequency inductor was connected in parallel with an
additional capacitor of 104 pF. The inductance of the
high-frequency inductor, taking into account power cables
and CPS output parameters, was about 1 ... 2 μH. The
backlash was established with the help of gaskets made of
glass-textile of various thicknesses. The measurements
were performed using an oscilloscope SDS7202.
Data analysis (Fig. 5) shows that when the gap is
reduced, the EMAT resonance frequency increases
approximately in inverse proportion to the frequency of
the power current: with a gap of 7 mm – about 1.3 MHz;
with a gap of 4.5 mm – about 1.6 MHz; with a gap of
2 mm – about 2.05 MHz and with a gap of 1 mm – about
2.45 MHz. These data confirm that CPS must necessarily
have a frequency regulation of the power current. Its own
amplitude-frequency response should be close to linear in
order to ensure the same power conditions for the
transducer. Especially these requirements are important
for automatic or automated measurements, monitoring
and diagnostics, when it is impossible to maintain the
exact gap size (usually several millimeters).
It is obvious that the CPS current feeding the EMAT
can not instantaneously bring into operation the parallel
resonant circuit of the electromechanical transducer. This
requires several periods of the generator current
frequency, Fig. 6. At the same time, the required number
of periods for EMAT output to the operating mode also
depends on the gap size. Consequently, it is necessary to
regulate the periods number of the filling frequency for
the pulse packet of the CRPG.
Fig. 5. The amplitude-frequency response of a high-frequency resonant
electromechanical transducer [10] connected to CPS at distances (gaps)
between a high-frequency conductor and an electrically conductive
ferromagnetic OT surface: 1 – 7 mm; 2 – 4.5 mm; 3 – 2 mm; 4 – 1 mm
Fig. 6. A typical voltage on the EMAT [1] when feeding CPS
It is known that the current in the resonant circuit
exceeds the current coming from the power source [12].
To evaluate its value, a shunt with a resistance of 0.01 Ω
was built into the parallel resonant EMAT circuit. During
resonance, its voltage was 4.5 V. Consequently, the
current in the EMAT high-frequency conductor was about
450 A. The requirement to increase the degree of
electromagnetic energy transformation into high-
frequency mechanical one by increasing the current in the
EMAT inductor developed by CPS on the basis of IGBT
transistors is satisfied.
Conclusions.
1. The main regulations for the creation of powerful
current pulse sources for feeding high-frequency
electromechanical transducers for measuring, monitoring
and diagnostics of electrical devices based on IGBT
transistors are developed.
ISSN 2074-272X. Електротехніка і Електромеханіка. 2018. №2 35
2. A practical implementation of a powerful current
pulse generator based on IGBT transistors of the
IRG4PC50F type is proposed, which provides currents of
up to 450 A in the frequency range 1 ... 3 MHz with a
pulse packet duration of 1 ... 20 in the inductor of a high-
frequency electromechanical transducer.
3. It is shown that CPS provides a significant increase
in the current of a high-frequency inductor when feeding
the resonant EMA transducers, thereby increasing
electromagnetic energy transformation into high-
frequency mechanical one in electrically conductive and
ferromagnetic materials.
4. The necessity to regulate the frequency and duration
of power pulses for high-frequency electromechanical
transducers intended for measurements, monitoring and
diagnostics is determined and experimentally confirmed.
5. It is experimentally determined that the gap increase
between the high-frequency EMAT inductor and the surface
of an electrically conductive ferromagnetic metal leads to a
decrease in the resonant frequency of the transducer,
approximately in inverse proportion to the current frequency.
This effect is due to the influence of metal properties on the
inductance of the high-frequency EMAT inductor located
with a gap above the product surface.
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Petrischev O.N., Desyatnichenko A.V. Generators of current
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Received 02.12.2017
S.Yu. Plesnetsov1, Candidate of Technical Science,
O.N. Petrishchev2, Doctor of Technical Sciences, Professor,
R.P. Mygushchenko1, Doctor of Technical Science,
G.M. Suchkov1, Doctor of Technical Sciences, Professor,
S.V. Sotnik3, Candidate of Technical Sciences,
O.Yu. Kropachek1, Candidate of Technical Science,
1 National Technical University «Kharkiv Polytechnic Institute»,
2, Kyrpychova Str., Kharkiv, 61002, Ukraine,
e-mail: krskd.kpi@gmail.com, hpi.suchkov@gmail.com
2 National Technical University of Ukraine «Igor Sikorsky Kyiv
Polytechnic Institute»,
37, Prosp. Peremohy, Kyiv, Ukraine, 03056,
e-mail: om.petrischev@aae.kpi.ua
3 Kharkiv National University of Radio Electronics,
14, Nauka Ave., Kharkiv, Ukraine, 61166,
e-mail: svetlana.sotnik@nure.ua
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| id | nasplib_isofts_kiev_ua-123456789-149332 |
| institution | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| issn | 2074-272X |
| language | English |
| last_indexed | 2025-12-07T15:35:44Z |
| publishDate | 2018 |
| publisher | Інститут технічних проблем магнетизму НАН України |
| record_format | dspace |
| spelling | Plesnetsov, S.Yu. Petrishchev, O.N. Mygushchenko, R.P. Suchkov, G.M. Sotnik, S.V. Kropachek, O.Yu. 2019-02-20T19:34:48Z 2019-02-20T19:34:48Z 2018 Powerful sources of pulse high-frequency electromechanical transducers for measurement, testing and diagnostics / S.Yu. Plesnetsov, O.N. Petrishchev, R.P. Mygushchenko, G.M. Suchkov, S.V. Sotnik, O.Yu. Kropachek // Електротехніка і електромеханіка. — 2018. — № 2. — С. 31-35. — Бібліогр.: 12 назв. — англ. 2074-272X DOI: 10.20998/2074-272X.2018.2.05 https://nasplib.isofts.kiev.ua/handle/123456789/149332 620.179.16: 620.179.17 Aim. Development of powerful current radio pulses generators (CRPG) for powering high-frequency electromechanical transducers based on IGBT transistors. Methodology. To carry out the research, the statements of the magnetic and electromagnetic fields interaction with electric and ferromagnetic material, electric circuits, structure of radio electronic devices theory were used. Results. The main provisions for creating powerful broadband generators for powering electromechanical transducers based on IGBT transistors are determined. It is shown that the generators intended for use in measurements, testing and diagnostics should provide adjustment of the frequency and duration of the output current pulses, and also provide current in the transducer inductor of several hundred amperes. The connection between the power frequency of the resonant electromechanical transducer and the gap between the transducer and the surface of the metal being diagnosed is established. A CRPG variant for powering electromechanical transducers in the frequency range 1 ... 3 MHz and the duration of current pulses of 1 ... 20 periods of the filling frequency is developed and manufactured. The peak current in the inductor of a high-frequency electromechanical transducer has reached 450 A. Novelty. For the first time, the possibility of using powerful IGBT transistors in electronic devices working in a key mode in push-pull circuits for feeding high-frequency electromechanical transducers is shown. Practical value. Using the results obtained will allow the creation of new instruments for measurement, control and diagnostics with wider characteristics. Цель работы. Разработка основных положений по созданию мощных источников импульсов тока для питания высокочастотных электромеханических преобразователей для измерений, контроля и диагностики электротехнических устройств на базе силовых IGBT транзисторов. Методика. Для проведения исследований использовались положения теории взаимодействия магнитных и электромагнитных полей с электропроводным и ферромагнитным материалом, электрических цепей, построения электронных устройств. Результаты. Определены основные положения по созданию мощных широкополосных генераторов для питания электромеханических преобразователей на базе силовых IGBT транзисторов. Показано, что генераторы, предназначенные для использования в измерениях, контроле и диагностике, должны обеспечивать регулировку частоты и длительности импульсов выходного тока, а также обеспечивать ток в катушке преобразователя величиной до 450 A. Установлена связь между частотой питания резонансного электромеханического преобразователя и зазором между преобразователем и поверхностью диагностируемого металла. Разработан и изготовлен вариант ИИТ для питания электромеханических преобразователей в диапазоне частот 1…3 MHz и длительности импульсов тока 1…20 периодов частоты заполнения. Пиковая величина тока в катушке высокочастотного электромеханического преобразователя достигла 450 A. Научная новизна. Впервые показана возможность применения силовых IGBT транзисторов в электронных устройствах, при ключевом режиме работы в двухтактных схемах для питания высокочастотных электромеханических преобразователей. Практическая значимость. Использование полученных результатов позволит создавать новые приборы для измерений, контроля и диагностики с улучшенными характеристиками. en Інститут технічних проблем магнетизму НАН України Електротехніка і електромеханіка Електротехнічні комплекси та системи. Силова електроніка Powerful sources of pulse high-frequency electromechanical transducers for measurement, testing and diagnostics Article published earlier |
| spellingShingle | Powerful sources of pulse high-frequency electromechanical transducers for measurement, testing and diagnostics Plesnetsov, S.Yu. Petrishchev, O.N. Mygushchenko, R.P. Suchkov, G.M. Sotnik, S.V. Kropachek, O.Yu. Електротехнічні комплекси та системи. Силова електроніка |
| title | Powerful sources of pulse high-frequency electromechanical transducers for measurement, testing and diagnostics |
| title_full | Powerful sources of pulse high-frequency electromechanical transducers for measurement, testing and diagnostics |
| title_fullStr | Powerful sources of pulse high-frequency electromechanical transducers for measurement, testing and diagnostics |
| title_full_unstemmed | Powerful sources of pulse high-frequency electromechanical transducers for measurement, testing and diagnostics |
| title_short | Powerful sources of pulse high-frequency electromechanical transducers for measurement, testing and diagnostics |
| title_sort | powerful sources of pulse high-frequency electromechanical transducers for measurement, testing and diagnostics |
| topic | Електротехнічні комплекси та системи. Силова електроніка |
| topic_facet | Електротехнічні комплекси та системи. Силова електроніка |
| url | https://nasplib.isofts.kiev.ua/handle/123456789/149332 |
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