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BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a conventional
piezoelectric ceramic transformer, and FIG. 2 is a perspective view showing an embodiment of
the piezoelectric ceramic transformer of the present invention. 5 ...... piezoelectric porcelain, 6 ......
- following side electrode, 7 ...... secondary electrode, 8 ...... insulating material layer.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the improvement
of a piezoelectric ceramic transformer for high voltage generation: The conventional piezoelectric
ceramic transformer is configured as shown in FIG. · 51, -tub, Ettal + [(14i-101Ti04J) K-and the
following side electrode 2 is provided oppositely, and the piezoelectric ceramic body 1
sandwiched between the electrodes 2I is divided in the thickness direction, Ik2 The secondary
side electrode 3 is provided on the side end face of the piezoelectric ceramic body 1 to the // * j
('7' 2), and the piezoelectric ceramic body 1 is polarized in the length direction with the
secondary side electrode 2 ing. With such a configuration, when a voltage is applied to the
primary side market pole 2 and an alternating current power supply 4 is applied, a high voltage
V of alternating current is generated on the secondary side electrode 3-however, the piezoelectric
ceramic according to the conventional configuration Transformers have the drawback of
decreasing the output voltage V 低下 due to the influence of humidity etc., and this has been a
serious problem particularly in small-sized, low-power, piezoelectric ceramic transformers
intended to rain high voltage. The present invention eliminates the above-mentioned
conventional drawbacks. Hereinafter, the present invention will be described with reference to
FIG. 2 of the embodiment. In FIG. 2, reference numeral 5 denotes a plate-like piezoelectric
ceramic body, and primary side electrodes 6 are formed on upper and lower surfaces of about
half of the piezoelectric ceramic body 6. Primary side magnetic pole 6 of the piezoelectric
ceramic body 6 is formed. On the side end face of the side on which the secondary side is not
applied, a secondary side type),. An insulating material layer 8 is formed on the secondary side of
the piezoelectric ceramic body 3. An alternating-current power supply 9 is connected to the next-
side electrode 6 so that an input voltage V1 can be applied. A phenolic resin is used as the
insulating material forming the insulating material layer 8, and this phenolic resin is applied,
dried dust, and thermally cured to form the insulating material layer 8. As a resin for improving
the moisture resistance performance, although silicone varnish, various waxes, silicone oil, etc.
can be considered, the corona resistance is not sufficient, and since the piezoelectric ceramic
transformer is a vibrator, its vibration is Insulating materials that do not suppress That is, it is
optimal to thinly apply a material having a high mechanical Q. A material that meets this
condition is lightning / phenol resin. (1) A phenolic resin is diluted with a solvent, applied to the
piezoelectric ceramic 1 base body 6, dried, and then thermally cured to form an insulating
material 1-8. As described above, the piezoelectric ceramic transformer of the present invention
has a corona-resistant insulating material layer formed on the secondary side -C, so the high
voltage generating part is isolated from the outside and corona discharge into the air And the
surface resistance of the secondary side surface is also increased, so that the moisture resistance
performance is remarkably improved, the fluctuation due to the output voltage n p temperature
and humidity is also eliminated, and a high voltage can be obtained with a small size and low
power. There is no problem at all, and it is a thing of great practical value. 0
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description, jps53112282
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