POWER SUPPLY CIRCUIT SYSTEM FOR JET FAN DRIVE DEPENDENT ON 18 RECTIFIER CIRCUITS USING NON-ISOLATED TRANSFORMER

WIPO Patent Application WO/2023/112318

A1

[Problem] To provide a power supply circuit system for a jet fan drive in which 18 rectifier circuits having a phase difference relationship of 20 degrees among each other are configured using a non-isolated transformer. [Solution] Using a non-isolated multiphase transformer 110 which has a lead circuit element that advances the phase of a three-phase commercial power supply by approximately 20 degrees and a lag circuit element that delays the phase by approximately 20 degrees, and which converts the three-phase commercial power supply into six phases, a leading-phase three-phase power supply and a lagging-phase three-phase power supply having a phase difference of approximately 20 degrees are generated from the three-phase commercial power supply. Furthermore, a step-up autotransformer 120 for adjustment step-up is provided to step up the voltage of the three-phase commercial power supply by 6.4% while the phase remains at 0 degrees. Each output is converted from AC to DC by a diode three-phase bridge rectifier circuit 130 and inputted to an inverter circuit. Any voltage imbalance between the 18 rectifier circuits is minimized by stepping up the voltage by 6.4% using the step-up autotransformer 120 for adjusting step-up. It is also possible to adjust the values of AC reactors 140-1, 140-2, 140-3 to compensate for leakage inductance.

KAWABATA TAKAO (JP)
SAKO HIBIKI (JP)

PCT/JP2021/046793

June 22, 2023

December 17, 2021

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SOHATSU SYSTEM LABORATORY INC (JP)

E21F1/00; H02M7/06

JP2019050685A	2019-03-28
JP2018087423A	2018-06-07
JP2011208442A	2011-10-20
JP2012130210A	2012-07-05
JPH10323045A	1998-12-04

NAGAI,Michiaki (JP)

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