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Modelling of a New Six-Phase High Voltage Power Supply for
Industrial
Microwave Generators with Magnetron by Phase
! "H"NI#$ M! %H&"'G"N(#$ M! )(&)&"##$ "! *+,I. N! (l
GH","/#
*Materiels, Systems and Technology of Information, EST
Agadir
(Ibnou Zohr University !" ##$S %&&&& Agadir '
Morocco
[email protected]**Electrical Engineering, "o)er electronic
aboratory, EMI +abat
"bstract0This original work treats the feasibility study of new
type of high voltage (HV) power supply
with a character si!phase for a magnetron "## $atts!%&'# Hz
per phase for industrial microwavegenerators from the modelling
with *T+ code (*lectroagnetic Transients +rogram) of a
single!phase
HV power supply for a magnetron. This new system consists to
couple identical models of si single!
phase transformers with magnetic shunt supplied respectively by
si!phase voltages system.
The operation of the modelling with *T+ code of the power system
for a magnetron consists to useessentially the developed model of
its transformer which is a ,uadruple in - composed of saturable
inductances able to translate the non linear phenomena of
saturation while ensuring the process ofstabilization of the
magnetron current. The feasibility study was carried out
satisfactory and the analysis
of the obtained results confirms the possibility of functioning
of this new system without interactionbetween magnetrons that
allows to obtain relative to current device the gains of size
volume cost of
implementation and maintenance and so makes this system more
economical while ensuring the processof regulating the current in
each magnetron.
eywords/ odelling0 1ew power supply0 se!phase0 magnetron0
2enerator0 icrowave0 *T+
3. 41T56789T461
9urrently the single phase power supply of one magnetron
for generator microwave uses a HV transformer withmagnetic shunt
:3;!:33;.
To participate in the development of innovation technologyfor
industrial fabrication of power supply for magnetrons of
microwave generators used in domestic or industrialapplications
this work is part of development of a new type
of HV power supply with character si!phase for
microwavegenerators supplying several magnetrons. That presents
multiple benefits in terms of reducing of weight
volumeelectrical wiring and of cost during the implementation
and
maintenance of such a new device.
The tendency toward the new device will be therefore a
different version of the model single!phase currently made bythe
manufacturers of microwave in domestic ovens or
industrial applications. 4t may have either a
single!phasetransformer :3%;!:3'; or three!phase or si!phase (
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a character si!phase for a magnetron by phase (1 > 3)
from
the modelling with *T+ code :3?;!:%?; of a single!phaseHV power
supply for magnetron.
%. 67*412 6< HV +6$*5 A8++B '# Hz A>3?'# VC 83>%%# V
and
8%>%EE# V(resistance of the primary back to the secondary
rJ3>3## secondary resistance r%>?' number of primary
turns/ n3>%%& number of turns in the secondary n%>
%#)0
IC condenser with a capacity 9>#K L< and a high
voltage
diode 7HT 0
IC magnetron designed to function under an approimately
voltage ## V.
To obtain its nominal power it needs an average intensity
4mean> E## mC but without eceeding the peak value of
itscurrent (4peakM3% C).
4n addition the manufacturer has possible to etract thevalues *
> E"## V and 5 > E'#$.
The figures & and ' indicates that in nominal
functioning(83>%%# V and f>'# Hz) the results of simulation
by *T+
of the device in non linear mode are in concordance with the
eperimental waveforms observed in these same conditions.4ndeed
between peak to peak values the variations relative
never eceed ?N. Taking into account the precision the
various data and acceptable tolerances on operation of the
magnetron the validity of modelling was considered to
besatisfactory. 6n the other hand the stabilizing effect of
thecurrent magnetron has been checked with respect to the
