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1. 发明专利

JPH09285131A STEP-UP TYPE 3-PHASE FULL-WAVE RECTIFIER AND ITS CONTROL METHOD 失效
公开(公告)号：JPH09285131A
公开(公告)日：1997-10-31
申请号：JP12098196
申请日：1996-04-18
申请人： ORIGIN ELECTRIC , NIPPON TELEGRAPH & TELEPHONE
发明人： SUZUKI YOSHIO , KII YASUO , OTSU SATOSHI , MUROYAMA SEIICHI
IPC分类号： H02M7/219 , H02M7/12
摘要： PROBLEM TO BE SOLVED: To provide a control method excellent in controllability which reduces switching loss of a switching semiconductor device and power loss of an inductor for voltage step-up, and does not distort an input current waveform. SOLUTION: In this control method, there are provided with a current detector 4 detecting phase currents flowing in the respective 3-phase AC lines, inductors 5 for voltage step-up which are installed on the respective lines, a 3-phase full-wave rectifying circuit 3 constituted by connecting switching semiconductor elements in 3-phase bridge constitution, a smoothing capacitor 7, and a control circuit 9 which makes the switching semiconductor device operate in high frequency switching by previously determined sequence. The switching semiconductor element are made to operate sequentially in high frequency switching with period T1, in the respective period T of an AC input voltage while putting a pause term between the periods. The period T1 is rather short as compared with the period T. An AVR signal depends on a load side voltage. A pause signal interrupts the supply of the AVR signal to a plurality of the switching semiconductor elements. When the AVR signal exists at the start end and the terminal end of the pause signal, the AVR signal has priority to the pause signal.

2. 发明专利

JPH09322542A BOOSTING-TYPE THREE-PHASE FULL-WAVE RECTIFICATION DEVICE AND ITS CONTROL METHOD 失效
公开(公告)号：JPH09322542A
公开(公告)日：1997-12-12
申请号：JP15602896
申请日：1996-05-28
申请人： ORIGIN ELECTRIC , NIPPON TELEGRAPH & TELEPHONE
发明人： SUZUKI YOSHIO , IINO YASUHIRO , OTSU SATOSHI , KUWATA YUTAKA , MUROYAMA SEIICHI
IPC分类号： H02M7/219 , H02M7/12
摘要： PROBLEM TO BE SOLVED: To reduce the switching loss of a switching semiconductor element and power loss due to unneeded LC vibration. SOLUTION: A device has a current detector 4 for detecting phase current that flows to each of a three-phase AC line, an inductor 5 for boosting that is provided at each phase line, a three-phase all-wave rectification circuit 6 where switching semiconductor elements Q1-Q6 are connected to a three-phase bridge configuration, a smoothing capacitor 7, and a control circuit 9 for switching the switching semiconductor elements Q1-Q6 at a high frequency in a predetermined sequence. In this case, a pair of switching semiconductor elements Q7 and Q8 that are connected in series via an inductance element 11 are provided over the output terminal of the three-phase all-wave rectification circuit 6 and at the same time, an element D0 for preventing return flow is connected between the pair of switching semiconductor elements Q7 and Q8 and the smoothing capacitor 7.

3. 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.

4. 发明专利

JPS6268067A PUSH-PULL BOOSTING CONVERTER 失效
公开(公告)号：JPS6268067A
公开(公告)日：1987-03-27
申请号：JP20448385
申请日：1985-09-18
申请人： NIPPON TELEGRAPH & TELEPHONE , ORIGIN ELECTRIC
发明人： OTSU SATOSHI , OGATA TSUTOMU , SUZUKI YOSHIO , ITO MIKIO
IPC分类号： H02M3/337 , H01F30/00
摘要： PURPOSE:To reduce loss by specifically connecting a winding for a boosting choke and a diode for a feedback. CONSTITUTION:A push-pull boosting converter is constituted of switching elements 2, 3, a boosting choke 4, a diode 5 for a feedback, a transformer 6 and a rectifying circuit 7, and supplies load 8 with electricity. The diode 5 for the feedback is connected between the plus side of a DC power supply 1 and the winding-end side of an NS winding for the boosting choke 4 at polarity shown in the figure in this case. Accordingly, potential difference between an NP winding and the NS winding for the boosting choke 4 is kept constant at all times and is not varied, thus eliminating loss on charging and discharging operation.

5. 发明专利

JPS6268066A CONSTANT-VOLTAGE POWER UNIT 失效
公开(公告)号：JPS6268066A
公开(公告)日：1987-03-27
申请号：JP20448485
申请日：1985-09-18
申请人： NIPPON TELEGRAPH & TELEPHONE , ORIGIN ELECTRIC
发明人： OTSU SATOSHI , OGATA TSUTOMU , IIJIMA AYUMI , ITO MIKIO
IPC分类号： H02M3/28
摘要： PURPOSE:To keep output voltage constant by comparing voltage obtained by adding voltage corresponding to the primary side currents of a transformer to reference voltage for setting output voltage and output voltage from a tertiary winding and controlling the pulse width of an inverter. CONSTITUTION:A constant-voltage power unit is constituted of an inverter 2, a transformer 3, a rectifying circuit 4, etc., and supplies load 7 with electricity. A tertiary winding N3 is fitted to the transformer 3, and voltage induced in the tertiary winding is rectified by a rectifier 8, and fed back to the inverter 2 through an error amplifier 9 and reference voltage 10 for setting output voltage, thus constantly controlling output voltage. A current transformer 11, a rectifier 12, a current-voltage converter 13 and an adder 14 are added at that time. Consequently, input currents flowing through a primary winding N1 for the transformer 3 are inputted to the converter 13 through the current transformer 11 and the rectifier 12, and the input currents flowing through the primary winding N1 are added 14 to reference voltage 10 as voltage approximated so as to compensate the lowering section of output currents-output voltage characteristics. Accordingly, the lowering of output voltage to the variation of output currents can be compensated.

6. 发明专利

JPH06231697A POWER SUPPLY DEVICE FOR TRAVELING-WAVE TUBE 失效
公开(公告)号：JPH06231697A
公开(公告)日：1994-08-19
申请号：JP3747393
申请日：1993-02-02
申请人： ORIGIN ELECTRIC , NIPPON TELEGRAPH & TELEPHONE
发明人： HASHIMOTO KAZUAKI , NAKAE KOICHI , OTSU SATOSHI , YAMASHITA TAKASHI , MIZUNO HIDEKI
IPC分类号： G05F1/10 , H01J23/34 , H02M3/28 , H02M7/48
摘要： PURPOSE:To increase the voltage stability of a high-voltage charged heater in a power supply unit for a traveling-wave tube. CONSTITUTION:The primary winding 5a of a transformer 5 is connected to a field effect transistor 7 on-off-driven by a high frequency through a driving circuit 9. The voltage from its secondary winding 5b is rectified to supply a direct current to the heater 34 of a traveling-wave tube 35. Connection is made to the + input terminal of an arithmetic circuit 15 from the detecting winding 5b of the transformer 5 through a rectifier circuit. A reference voltage 17 is supplied to the - terminal of the arithmetic circuit 15 through a resistor 18. A the same time, a signal obtained from a current transformer 25 connected to the secondary widing 5c is rectified to supply as a correction signal to the -terminal of the arithmetic circuit 15 through a resistor 54. The correction signal stabilizes a heater voltage with higher accuracy.

7. 发明专利

JP2002334710A LOAD FOLLOWING TYPE FUEL CELL POWER GENERATION SYSTEM 失效
公开(公告)号：JP2002334710A
公开(公告)日：2002-11-22
申请号：JP2001136968
申请日：2001-05-08
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： HOSHIJIMA KEIZO , OTSU SATOSHI
IPC分类号： H01M8/00 , H01M8/04 , H01M10/60 , H01M10/615 , H01M10/627 , H01M10/655 , H01M10/6556 , H01M10/6568 , H01M10/657 , H01M10/667 , H01M10/50
摘要： PROBLEM TO BE SOLVED: To provide a fuel cell power generation system capable of following rapid fluctuations in load power and preventing the occurrence of power loss. SOLUTION: A fuel cell stack 22 is connected to a desulfurizer 21. An inverter 23 is connected to the cell stack 22. A sodium sulfur battery 25 is connected via a bidirectional converter 24 to nodes between the cell stack 22 and the inverter 23. The cell stack 22 is provided with a heat exchanger 26 connected thereto by cooling water tubes 29. A heater 27 is provided for heating the battery 25. The heater 27 is connected to the heat exchanger 26 by a medium tube 30 for heat transfer. The heat exchanger 26 is provided with a water heater 28 connected thereto by a medium tube 31 for heat transfer.

8. 发明专利

JPH0928078A AC INPUT POWER SUPPLY DEVICE 失效
公开(公告)号：JPH0928078A
公开(公告)日：1997-01-28
申请号：JP17586395
申请日：1995-07-12
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： TAKEUCHI AKIRA , OTSU SATOSHI , MUROYAMA SEIICHI
IPC分类号： H02M3/155 , H02M3/28 , H02M7/06 , H02M7/12
摘要： PROBLEM TO BE SOLVED: To supply exciting energy to an output only by passing it through a one-stage power converter circuit by controlling a switching element so that the stored energy of an energy storage element becomes equal to the discharged energy at one cycle of an input AC period. SOLUTION: Energy is stored in a transformer 4 during the turn-on period of a switching element 31, and the exciting energy stored into the transformer 4 during the simultaneous turn-off period of switching elements 31, 71 is supplied to an output. In a charging mode, the energy stored into transformer 4 during the turn-on period of the switching element 71 is charged into a capacitor 8. In a discharging mode, since electric power from an AC input source 1 and the capacitor 8 is simultaneously supplied to the output by turning on and off a switching element 92, a voltage between output terminals 61, 62 can be stabilized by controlling the switching elements 71, 92. Accordingly, a device which is miniaturized and has high efficiency and a high power factor can be formed.

9. 发明专利

JPH0638409A CONTROLLING METHOD FOR SUPERCONDUCTING ENERGY STORAGE/ CONVERSION DEVICE 失效
公开(公告)号：JPH0638409A
公开(公告)日：1994-02-10
申请号：JP19443792
申请日：1992-07-22
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： TAKENO KAZUHIKO , OTSU SATOSHI , YAMASHITA TAKASHI
IPC分类号： H01L39/20 , H02J15/00 , H02M3/155
摘要： PURPOSE:To reduce the size of a superconducting energy storage conversion device using switches of slow switching speeds by reducing the size of a converter section using a permanent power switch of a fast switching speed. CONSTITUTION:A two way converter 23 which can make high-speed switching is made conducting/nonconducting operations by two or more times during the period in which a control switch 24 is turned off and permanent current switch 2 is turned on. By reducing the energy transmitted between a DC input power source 21 and capacitor 22 during one period in such a way, the sizes of the power source 21 and converter 23 are reduced. On the other hand, by making the converter 23 operate at a frequency higher than the operating frequencies of the control switch 24 for controlling the taking in and out of energy between the capacitor 22 and a superconducting coil 1 and the switch 2 of a slow switching speed, the size of an inductor 231 which is one of the component of the converter 23 is reduced by using a higher frequency.

10. 发明专利

JPH0583100A DRIVE CIRCUIT FOR MOSFET 失效
公开(公告)号：JPH0583100A
公开(公告)日：1993-04-02
申请号：JP24097391
申请日：1991-09-20
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： OTSU SATOSHI , YAMAMOTO KATSUHIKO , SUKAI TOMOJI
IPC分类号： H03K17/04
摘要： PURPOSE:To attain high speed switching even when an input capacitance is large by selecting a different voltage fed between a gate and a source from an initial period when a MOSFET transits to the ON state from other period. CONSTITUTION:When a voltage of a drive signal source 3 reaches a high level, since the gate-source voltage of a driven MOSFET 1 is lower than the reference value of a reference voltage source 9, a comparator 10 controls a switch 8 and a drive circuit 2 outputs the voltage of a 2nd drive circuit power supply 7. Thus, the gate-source voltage is increased and when the voltage reaches the threshold voltage of a FET 1 or over, the FET 1 is turned on. When the voltage reaches the reference voltage or over, the comparator 10 controls the switch 8 to supply power to the circuit 2 from the 1st drive circuit power supply 4 and to charge up a capacitor 5. When a signal source 3 reaches a low level, an inverter 12 closes a 2nd switch 11 to short-circuit a capacitor 5 thereby decreasing the gate-source voltage and when the voltage reaches a threshold voltage or below, the FET 1 is turned off. Thus, the switching time is reduced.

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