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H
ELECTRICITY
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H02
GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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H02M
APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
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5/00
Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases
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H02M5/02
without intermediate conversion into DC
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H02M5/04
by static converters
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H02M5/22
using discharge tubes with control electrode or semiconductor devices with control electrode
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H02M5/25
using devices of a thyratron or thyristor type requiring extinguishing means
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H02M5/27
for conversion of frequency
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H02M5/271
from a three phase input voltage
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