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11. 发明专利

JP3382074B2 Power converter 失效
标题翻译：空值
公开(公告)号：JP3382074B2
公开(公告)日：2003-03-04
申请号：JP28869395
申请日：1995-11-07
申请人：株式会社東芝
发明人：玲宮崎
IPC分类号： H01B11/12 , H02M1/14 , H02M7/04 , H02M7/17 , H02M7/48 , H02P27/06 , H02P7/63

12. 发明专利

JP3373349B2 Rectifier control device 失效
标题翻译：空值
公开(公告)号：JP3373349B2
公开(公告)日：2003-02-04
申请号：JP172296
申请日：1996-01-09
申请人：三菱電機株式会社
发明人：融真山本
IPC分类号： G05F1/00 , H02J1/10 , H02J1/12 , H02M7/12 , H02M7/145 , H02M7/17 , H02M7/493 , H02M7/48
CPC分类号： H02M7/17 , H02J1/10

13. 发明专利

JP2002531043A 失效
公开(公告)号：JP2002531043A
公开(公告)日：2002-09-17
申请号：JP2000583148
申请日：1999-11-04
IPC分类号： B23K9/073 , B23K9/10 , G05F1/614 , H02J3/38 , H02M1/10 , H02M3/28 , H02M7/12 , H02M7/17 , H02M9/00
摘要： A voltage switch-over device (23) has a power rectifier (26), a step-up transformer (34,35) with storage elements (50,51), a transformer (40), a switching device (59), a controller (4) and power connection lines (27-29) connecting the power rectifier to a power source (24). A consumer (25) is connected to the transformer's secondary winding (42). Connected to the switching device or controller, a network evaluation device (32) assesses the power source voltage.

14. 发明专利

JP3226257B2 失效
公开(公告)号：JP3226257B2
公开(公告)日：2001-11-05
申请号：JP33625295
申请日：1995-12-25
IPC分类号： H02M7/162 , H02J3/36 , H02M7/12 , H02M7/155 , H02M7/17 , H02M7/48

15. 发明专利

JP3221941B2 失效
公开(公告)号：JP3221941B2
公开(公告)日：2001-10-22
申请号：JP31004492
申请日：1992-11-19
IPC分类号： H02M7/155 , H02M7/12 , H02M7/17

16. 发明专利

JP3211071B2 失效
公开(公告)号：JP3211071B2
公开(公告)日：2001-09-25
申请号：JP8224794
申请日：1994-03-29
IPC分类号： H02M7/17 , B60L9/24 , H02M7/12 , H02M7/48 , H02M7/483
摘要： PURPOSE:To reduce the size and cost of an equipment by making the withhold voltage of such devices as an ac contactor and a charging resistor of an initial charging circuit of an electric car which has a PWM converter and a PWM converter small. CONSTITUTION:In an electric car which has a PWM converter 4 and a PWM converter 6, an initial charging circuit is installed which passes the output of an ac supply 1 through a tertiary winding 15 of a transformer whose voltage is lower than that of a secondary winding 3 of a transformer, an ac contactor 17, and a charging resistor 18 and then rectifies it by a diode bridge circuit 19 and charges a smoothing capacitor 5 with the rectified current. When this initial charging circuit intially charges the smoothing capacitor 5, it opens an ac contactor 8 and closes the ac contactor 17 and preliminarily charges the capacitor 5 using the tertiary winding 15 of the transformer as a power supply and after that, it opens the ac contactor 17 and closes the ac contactor 8 and further charges the capacitor through the diode bridge circuit of the PWM converter 4. Even if the ac contactor 8 is closed directly, rush current and overvoltage are small since the smoothing capacitor 5 is preliminarily charged and thereby charging can be done safely.

17. 发明专利

JP3192168B2 失效
公开(公告)号：JP3192168B2
公开(公告)日：2001-07-23
申请号：JP16398091
申请日：1991-06-07
IPC分类号： G05F1/14 , H02M7/12 , H02M7/17

18. 发明专利

JPH10272564A ENGINE-DRIVEN WELDING MACHINE 失效
公开(公告)号：JPH10272564A
公开(公告)日：1998-10-13
申请号：JP11412597
申请日：1997-03-28
申请人： SHIN DAIWA KOGYO
发明人： TAKASHITA MUNEMITSU , MARUOKA TADASHI
IPC分类号： B23K9/073 , H02J9/04 , H02M7/17 , H02M7/19
摘要： PROBLEM TO BE SOLVED: To enable superior welding, by connecting plural DC welding power sources in series, boosting the voltage, and supplying it to one welding rod at the time of lowering load-free voltage of a DC welding power source in the low speed revolution of an engine. SOLUTION: This engine-driven welding machines is constituted so that an engine-driven power generating unit is wound with plural power generating coils 11 , 12 , each generating output is converted into a DC welding power source 31 , 32 , and plural welding rods 41 , 42 are made simultaneously operable. In this case, the machine is equipped with a changeover circuit 7 which, at the time of lowering the load-fire voltage in the low speed revolution the engine, connects DC welding power sources in series, so that the voltage is boosted and supplied to one welding rod.

19. 发明专利

JPH09201056A POWER CONVERTER SYSTEM 失效
公开(公告)号：JPH09201056A
公开(公告)日：1997-07-31
申请号：JP2311896
申请日：1996-01-16
申请人： HITACHI LTD
发明人： IWAJI YOSHINAO , OKUYAMA TOSHIAKI , IKIMI TAKASHI , TOBIYO MASAHIRO
IPC分类号： H02J3/38 , H02J3/01 , H02M1/12 , H02M3/28 , H02M7/12 , H02M7/155 , H02M7/17 , H02M7/493 , H02M7/48
摘要： PROBLEM TO BE SOLVED: To suppress harmonics which flow out when a plurality of converters are dispersedly arranged by detecting the phase of the electric power supplied from power systems at every power converter and generating a triangular-wave carrier by synchronizing the carrier to the power phase and, at the same time, arbitrarily setting the phase of the carrier. SOLUTION: A command value generator 4 computes a voltage command and outputs the command aiming at the electric power required for a load device 10 and with the purpose of making the power factor of a converter 71 to '1'. A power phase detector 8 detects the phase of electric power and a phase command generator 9 generates a synchronous signal so as to synchronize a triangular-wave signal to the phase of supplied electric power. A triangular wave generator 52 generates the triangular-wave carrier based on the phase command from the phase command generator 9 and a PWM controller 5 generates a PWM pulse by comparing the carrier with the output signal of the command value generator 4. Thus the phase of the triangular-wave carrier of each converter is set by giving a power phase detecting function to each converter and realizing power supply synchronizing PWM in each converter.

20. 实用新型

JP2542969Y2 失效
公开(公告)号：JP2542969Y2
公开(公告)日：1997-07-30
申请号：JP11363791
申请日：1991-12-26
IPC分类号： H02M7/17 , H02M7/12 , H02P7/292

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