专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明专利

JPS545529A INVERTER UNIT 失效
公开(公告)号：JPS545529A
公开(公告)日：1979-01-17
申请号：JP7089677
申请日：1977-06-15
申请人： NIPPON TELEGRAPH & TELEPHONE , SANYO ELECTRIC CO
发明人： MUROYAMA SEIICHI , FUKITA MUNEO
IPC分类号： G05F5/00 , H02M7/48
摘要： PURPOSE:To restrict excessive variation of the output terminal voltage V. S. input variation, by connecting, with a connecting resistance and for the purpose of controlling the output voltage, the output power control unit to the detector element of the differential circuit connected to the input terminal of the DC-AC inverter unit.

2. 发明专利

JPH0731148A UNINTERRUPTIBLE POWER SUPPLY 失效
公开(公告)号：JPH0731148A
公开(公告)日：1995-01-31
申请号：JP19401993
申请日：1993-07-09
申请人： SANYO ELECTRIC CO , NIPPON TELEGRAPH & TELEPHONE , NIPPON ELECTRIC IND , SHINANO DENKI KK
发明人： KOJIMA KENZO , MUROYAMA SEIICHI , TAKEUCHI NORIKAZU , YUASA MASAAKI , OFUJI MASAAKI
IPC分类号： H02J7/34 , H02J9/06 , H02M7/08 , H02M7/48
摘要： PURPOSE:To provide an uninterruptible power supply which can deal with the extension of the operating time of battery economically and flexibly. CONSTITUTION:The uninterruptible power supply comprises a rectifier section 2 where rectifier units 6 are connected in parallel wherein the number of parallel connected units is selected depending on the desired level of charging current. The housing is previously provided with a space for mounting the maximum number of rectifier units.

3. 发明专利

JPS545532A STOP SYSTEM FOR INVERTER 失效
公开(公告)号：JPS545532A
公开(公告)日：1979-01-17
申请号：JP7089777
申请日：1977-06-15
申请人： NIPPON TELEGRAPH & TELEPHONE , SANYO ELECTRIC CO
发明人： MUROYAMA SEIICHI , KOBAYASHI HIDETOSHI
IPC分类号： H02M7/515
摘要： PURPOSE:To suppress a shorting current fully to a small level caused by a commutation failure at the time of stopping, by means of suppressing the output current fully to a small level with output voltage of DC-AC conversion unit attenuated at the time of stopping.

4. 发明专利

JPH06351256A INVERTER 失效
公开(公告)号：JPH06351256A
公开(公告)日：1994-12-22
申请号：JP15615793
申请日：1993-06-02
申请人： SANYO ELECTRIC CO , NIPPON TELEGRAPH & TELEPHONE , SHINANO DENKI KK
发明人： SEKINO YOSHIHIRO , NAKAJIMA TADAHISA , KOBAYASHI YOSHIAKI , MUROYAMA SEIICHI , SUZUKI NOBORU , AOKI MASAYUKI
IPC分类号： G05F1/10 , H02M7/48
摘要： PURPOSE:To significantly simplify and downsize the controller for inverter and to reduce the total cost. CONSTITUTION:The inverter for inverting a DC voltage EDC into an AC voltage of desired frequency through a DC-DC converter 1, a DC-AC converter 2 and an AC filter 3 comprises a controller 5 for the DC-AC converter 2, a pulse memory storing a PWM pattern, and a distribution circuit for converting the signals read out in time series from the memory into drive signals.

5. 发明专利

JPH10322917A DETERIORATION DISCRIMINATION FOR SECONDARY BATTERY AND DEVICE THEREOF 失效
公开(公告)号：JPH10322917A
公开(公告)日：1998-12-04
申请号：JP13779297
申请日：1997-05-12
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： TAKENO KAZUHIKO , YAMAZAKI MIKIO , SUZUKI TORU , MUROYAMA SEIICHI
IPC分类号： G01R31/36 , H01M10/48 , H02J7/00 , H02J7/10
摘要： PROBLEM TO BE SOLVED: To discriminate deterioration without cutting off a secondary battery from load by measuring an open-circuit time necessary for decreasing the voltage of a secondary battery to a minimum threshold voltage, and discriminating it to be deteriorated, if it reaches a prescribed threshold value. SOLUTION: A deterioration discrimination circuit DC1 of a secondary battery is constituted, by including a secondary battery 1, a constant circuit 2 for charging it, a MOSFET 3 for controlling its charging condition, a Schmitt trigger circuit 8 for attaining a voltage discrimination circuit, and a comparator 15 for detecting the length of an open-circuit time. By taking the time required to decrease the voltage of the secondary battery 1 to the minimum threshold value voltage as an open-circuit time T in one cycle of charging condition during intermittent charging of the secondary battery 1 and an open-circuit condition, and preparing data indicating a relation between the open-circuit time T and a capacity Q of the secondary battery 1, it is discriminated to be deteriorated, if the open-circuit time T decreases to a prescribed threshold value Tf or lower in the process of intermittent charging. It is thus possible to discriminate the deterioration in the secondary battery, without cutting off the secondary battery from load.

6. 发明专利

JPH09322543A CONTROL METHOD AND CONTROL CIRCUIT FOR STEP-UP TYPE 3-PHASE FULL-WAVE RECTIFIER 失效
公开(公告)号：JPH09322543A
公开(公告)日：1997-12-12
申请号：JP15602996
申请日：1996-05-28
申请人： ORIGIN ELECTRIC , NIPPON TELEGRAPH & TELEPHONE
发明人： SUZUKI YOSHIO , KOGURE KATSUMI , OTSU SATOSHI , KUWATA YUTAKA , MUROYAMA SEIICHI
IPC分类号： H02M7/219 , H02M7/12
摘要： PROBLEM TO BE SOLVED: To reduce the power loss of a step-up inductor and a power loss caused by a circulating current, by a method in which switching semiconductor devices of 2 proper phases among 3 phases are made to perform high frequency switching operations in any sections in respective periods of an input AC voltage. SOLUTION: Switching semiconductor devices Q1-Q6 are controlled so as to perform switching operations in periods of about 2π/3 in the half periods (π) of corresponding phase voltages and to rest in remaining about π/3 periods. That is, only the switching semiconductor devices of the proper 2 phases among 3 phases are made to perform high frequency switching operations. With this constitution, as a circulating current which flows back from the output side to the 3-phase AC input power supply side does not exist, the power loss of the circuit can be reduced.

7. 发明专利

JPS6412834A POWER SOURCE SYSTEM 失效
公开(公告)号：JPS6412834A
公开(公告)日：1989-01-17
申请号：JP16822787
申请日：1987-07-06
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： OGATA TSUTOMU , MUROYAMA SEIICHI , YOTSUMOTO KATSUICHI , KOYAMA YUGO
IPC分类号： H02J9/08 , H02J9/06
摘要： PURPOSE:To simplify the structure of a power chamber and to enhance reliability by distributing a commercial power supply to a distribution chamber as it is, DC-converting the outputs of a plurality of generators in the power chamber at the time of power interruption, and distributing the power through the same power transmission line to the distribution chamber. CONSTITUTION:In a power supply system for transmitting DC power from a power chamber E to a power distribution chamber D without power interruption, a changeover switch 15 is provided in the chamber E, and the AC power is supplied to an AC/DC converter 5 in the chamber D when a commercial power supply 1 is normal. A plurality of AC generators 3A, 3B and AC/DC converters 14A, 14B for converting the outputs of the generators are mounted in the chamber E. When a power interruption detection/changeover switch controller 13 detects the power interruption of the power supply 1, the switch 15 is switched, and the AC outputs of the generators 3A, 3B are converted to DC powers, which are supplied through the same power transmission line to the converter 5 of the chamber D.

8. 发明专利

JPS61189173A RECTIFIER 失效
公开(公告)号：JPS61189173A
公开(公告)日：1986-08-22
申请号：JP2756985
申请日：1985-02-16
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： MUROYAMA SEIICHI
IPC分类号： H02M7/21
摘要： PURPOSE:To enhance the efficiency of a rectifier by rectifying while pulse-width- modulating with high frequency, thereby responding at a high speed. CONSTITUTION:A rectifier is composed of a rectifying circuit 7 having a high frequency phase control function and a controller 8 for controlling it. The circuit 7 is composed of a transformer with an intermediate tap at the secondary side, a switching circuit of switch elements 11, 12, and a DC filter of a reactor 13 and a capacitor 14. This switching circuit generates a pulse of high frequency on the basis of an AC input, inverts the polarity of the pulse at every half cycle of the AC input to obtain a DC output of a pulse train aligned in the polarity. A DC output voltage Vc is controlled by altering the pulse width of the voltage Vb by varying the ratio of ON/OFF periods of the elements 11, 12.

9. 发明专利

JPS588167B2 失效
公开(公告)号：JPS588167B2
公开(公告)日：1983-02-15
申请号：JP14421473
申请日：1973-12-27
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： YOTSUMOTO SHOICHI , MUROYAMA SEIICHI
IPC分类号： H03K3/282 , H03K7/06

10. 发明专利

JPS5574379A POWER CONVERTER 失效
公开(公告)号：JPS5574379A
公开(公告)日：1980-06-04
申请号：JP14573078
申请日：1978-11-24
申请人： NIPPON TELEGRAPH & TELEPHONE , SANKEN ELECTRIC CO LTD
发明人： KAWAOMO YOSHIAKI , MUROYAMA SEIICHI
IPC分类号： H02M7/48 , H02M7/537 , H02M7/5387
摘要： PURPOSE:To raise the conversion frequency without raising the switching frequency by the method such that n primary windings are respectively electromagnetically connected to the secondary winding of a transformer, and further, a frequency voltage of n times the switching frequency is produced in the secondary winding by n switching circuits. CONSTITUTION:No.1, NO.2 and No.3 primary windings N1, N2 and N3 are provided. To these is electromagnetically connected transformer secondary winding Ns. Ns is provided with output terminals 1, 2. In inverter circuit 3, which converts DC into AC, No.1, No.2 and No.3 switching circuits 4, 5 and 6 are connected between primary windings N1, N2 and N3 and DC power source 6. The polarity of the direction of current in three primary windings N1, N2 and N3 is changed, and an output frequency of three times the switching frequency of No.1, No.2 and No.3 switching circuits 4, 5 and 6 is obtained.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式