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1. 发明专利

JPH02193543A SELECTIVE INTERCEPTION CIRCUIT FOR PARALLEL OPERATION DC POWER SOURCE DEVICE 失效
公开(公告)号：JPH02193543A
公开(公告)日：1990-07-31
申请号：JP865089
申请日：1989-01-19
申请人： SHINDENGEN ELECTRIC MFG , NIPPON TELEGRAPH & TELEPHONE , ORIGIN ELECTRIC
发明人： KIKUCHI YOSHIHIKO , OZU KIYOTSUGU , OHASHI YASUO , KUWATA YUTAKA , SUZUKI YOSHIO , ITO MIKIO
IPC分类号： H02J9/06 , H02J1/10
摘要： PURPOSE:To intercept a faulty circuit with high speed by a method wherein the output voltage of a current detecting circuit, inserted into a negative side, is compared with a reference voltage and a MOS-FET, connected to the negative side, is controlled with electricity is supplied to one load by parallel DC power sources. CONSTITUTION:DC power is supplied to a common load L by a plurality of DC power sources A, B. The output voltage V0 of a current detecting circuit DI, connected to negative side, is compared with a reference voltage Vr by a comparator CV. When V0>Vr, the comparator CV outputs a level H to put a MOS-FET transistor(Tr) ON. When the current is small and/or a DC power source is troubled and the current is about to flow in reverse direction, it becomes V0

2. 发明专利

JPH02294225A POWER SUPPLY EQUIPMENT HAVING BREAKING FUNCTION 失效
公开(公告)号：JPH02294225A
公开(公告)日：1990-12-05
申请号：JP11545989
申请日：1989-05-09
申请人： ORIGIN ELECTRIC , NIPPON TELEGRAPH & TELEPHONE , SHINDENGEN ELECTRIC MFG
发明人： SUZUKI YOSHIO , ITO MIKIO , SENOO KAZUHIRO , OHASHI YASUO , KUWATA YUTAKA , KIKUCHI YOSHIHIKO , OZU KIYOTSUGU
IPC分类号： H02J1/10 , H02J1/00
摘要： PURPOSE:To prevent hunting by judging the polarity of a voltage between source and drain corresponding to the value of a current flowing to MOSFET and by controlling via AND function a driving signal to be forwardly biased at a given current value or more. CONSTITUTION:At the time of an abnormal DC power supply 8, a current flowing from the source of MOSFETs 5, 17 toward the drain thereof approaches zero and the voltage drop between said source and drain decreases too. Then, a first driving signal is not generated from a given current value as a boundary and said MOSFETs 5, 17 are cut OFF. Accordingly, the current flows to a parasitic diode, the voltage drop between the source and drain becomes larger and the MOSFETs are going to be turned ON again by the first driving signal. However, when said ON is delayed a little by the use of a capacity between gate and source, a drain terminal voltage rises to a high state so that said MOSFETs 5, 17 are not turned ON even by the driving signal so as to retain the cut-OFF state. At the time of starting, said MOSFETs 5, 17 are controlled by a second driving signal. Consequently, it is possible to prevent hunting.

3. 发明专利

JPH03103070A SERIAL RESONANCE TYPE CONVERTER 失效
公开(公告)号：JPH03103070A
公开(公告)日：1991-04-30
申请号：JP23574589
申请日：1989-09-13
申请人： SHINDENGEN ELECTRIC MFG , NIPPON TELEGRAPH & TELEPHONE
发明人： KIKUCHI YOSHIHIKO , OZU KIYOTSUGU , OHASHI YASUO , KUWATA YUTAKA
IPC分类号： H02M3/28 , H02M3/335
摘要： PURPOSE:To obtain stability of control by driving only once a main switching element from one zero-cross to next zero-cross of a current in a parallel resonance circuit. CONSTITUTION:When the output of a converter is abruptly decreased and the frequency of an oscillator 3 is reduced, the output of a monostable multivibrator 15 attains a low level to trigger a monostable multivibrator 17. The output of the multivibrator 17 attains a high level to lower the output of the oscillator 3 during the period. Main switching transistors Q1, Q2 supply currents to a serial resonance circuit by a monostable multivibrator 4, a flip-flop 5 and AND gates 6, 7. Accordingly, the operating frequency of a converter can be held at the resonance frequency or more of a parallel resonance circuit by the setting time T1 of the multivibrator 15. The converter prevents control disable due to an abrupt drop of the impedance of the parallel resonance circuit to obtain stability of the control.

4. 发明专利

JPH03103069A SERIAL RESONANCE TYPE CONVERTER 失效
公开(公告)号：JPH03103069A
公开(公告)日：1991-04-30
申请号：JP23574489
申请日：1989-09-13
申请人： SHINDENGEN ELECTRIC MFG , NIPPON TELEGRAPH & TELEPHONE
发明人： KIKUCHI YOSHIHIKO , KOBAYASHI KIMISADA , OHASHI YASUO , KUWATA YUTAKA
IPC分类号： H02M3/28 , H02M3/335
摘要： PURPOSE:To always operate with a simple circuit by turning OFF a main switching element up to next operating period after a first zero-cross point of a current of a serial resonance circuit after the element is turned ON. CONSTITUTION:A flip-flop 17 is set by the initial rising edge of an output of a monostable multivibrator 4. Thereafter, it is reset by the initial rising edge of comparators 13, 14. The output of the flip-flop 17 attains a low level during the period, and then keeps a high level until it is set by the output of the multivibrator 4 falling thereafter. Main switching transistors Q1, Q2 are zero-switched by the output of a NAND gate 5, AND gates 6, 7 and a flip-flop 8. Accordingly, even if a repetition period of a low level of the outputs of the comparators 13, 14 occur, it can effectively be frequency-controlled.

5. 发明专利

JPH03103029A SELECTIVE INTERRUPTION CIRCUIT FOR PARALLEL OPERATION DC POWER SUPPLIES 失效
公开(公告)号：JPH03103029A
公开(公告)日：1991-04-30
申请号：JP23574689
申请日：1989-09-13
申请人： SHINDENGEN ELECTRIC MFG , NIPPON TELEGRAPH & TELEPHONE
发明人： KIKUCHI YOSHIHIKO , OZU KIYOTSUGU , OHASHI YASUO , KUWATA YUTAKA
IPC分类号： H02J1/00 , H02J1/10
摘要： PURPOSE:To realize stabilized power supply from parallel operation DC power supplies by connecting an anti-vibration circuit, comprising a series circuit of a resistor and a capacitor, between the gate and the emitter of a MOSFET. CONSTITUTION:Main section comprises DC power supplies, selective interruption circuits A, B, an output capacitor C1, a MOSFETTr, a body diode (d), resistors R1-R5, a comparator CV, a reference power supply Vr, a current detecting means Di, and a load L. The capacitance of the capacitor C2 is set in the range from tens to hundreds times of the input capacity of the MOSFETr. When vibration occurs and the DC power supply reaches the ON level of the MOSFETTr in the selective interruption circuit B, it is attenuated to the ON level of the MOSFETTr through the capacitor C2. By such arrangement, vibration can reliably be prevented and the parallel DC power supply can reliably be protected.

6. 发明专利

JPH0438173A RESONANCE CONVERTER 失效
公开(公告)号：JPH0438173A
公开(公告)日：1992-02-07
申请号：JP14246690
申请日：1990-05-31
申请人： ORIGIN ELECTRIC , NIPPON TELEGRAPH & TELEPHONE
发明人： ITO MIKIO , SENOO KAZUHIRO , KII YASUO , SUZUKI YOSHIO , OHASHI YASUO , KUWATA YUTAKA
IPC分类号： H02M3/28 , H02M3/335
摘要： PURPOSE:To realize a low inductance with the title converter by respectively connecting the primary and secondary windings of a plurality of transformers in parallel with each other and, at the same time, forming a serial resonance circuit of an integrated leakage inductor and capacitors. CONSTITUTION:The connecting midpoints of capacitors 21 and 22 and field effect transistors 31 and 32 are respectively used as nodes 81 and 82. The primary windings 41, 51, and 61 of transformers 4, 5, and 6 are connected with each other through leakage inductances 42, 52, and 62, respectively, between the nodes 81 and 82. The secondary windings of the transformers 4, 5, and 6 are connected in parallel with each other by means of nodes 91, 92, and 93, respectively. Both of the nodes 91 and 93 are connected to a capacitor 73 through diodes 71 and 72, respectively. Since each leakage inductance is one element of a serial resonance circuit, they show high impedances against the operating frequency of this converter by their resonance operations and their effects as a current balancer becomes larger in the parallel state.

7. 发明专利

JPH02280638A DC UNINTERRUPTIBLE POWER SUPPLY 失效
公开(公告)号：JPH02280638A
公开(公告)日：1990-11-16
申请号：JP10218989
申请日：1989-04-20
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： OHASHI YASUO
IPC分类号： H02J9/06 , G05F1/00
摘要： PURPOSE:To achieve effective utilization of battery by connecting a battery and a rectifier to the output side of e DC-DC converter and connecting a bypass diode, in forward direction with respect to the battery, across the converter while furthermore connecting a charger across the battery. CONSTITUTION:Upon stoppage of a rectifier 11 and a charger 19 due to interruption of commercial power source, a battery 14 is discharged immediately through a bypass diode 16 to feed DC power uninterruptibly to a load 15, and the voltage of the battery 14 lowers as discharge proceeds. A DC-DC converter 17 is operated before a voltage obtained by subtracting voltage drop across the bypass diode 16 from the voltage of the battery 14 lowers below the voltage level required by the load 15. When the converter 17 starts operation, the bypass diode 16 is biased reversely and the battery 14 feeds DC power through the converter 17 to the load 15 until the voltage is settled.

8. 发明专利

JPH01114337A SYSTEM OF CONTROLLING OUTPUT VOLTAGE OF RECTIFIER 失效
公开(公告)号：JPH01114337A
公开(公告)日：1989-05-08
申请号：JP26824387
申请日：1987-10-26
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： OHASHI YASUO , KOIZUMI YASUYUKI
IPC分类号： H02J7/34
摘要： PURPOSE:To reduce the number of silicon diodes from two to one, to make a load voltage compensator compact and lightweight, to make a loss lower and to make a reliability high by varying a setting center value of the output voltage of a rectifier by the said allowable value when the sum of drop-away voltage of the load voltage compensator and feeders is in excess of an allowable value of the floating charging voltage variation of a set battery. CONSTITUTION:When the floating charging voltage VF of a battery set 3 such as the output voltage of a rectifier 2 is such that the load current is 0 and 53, 52V, the voltage VL of the load 8 is such that a magnet contact 4 is opened and that reaches 52.97V by the drop-away voltage of a silicon diode 5. With the increasement of load current, the floating charging voltage VF of the battery set 3 lowers by the regulation of the rectifier 2, voltage VL of the load 8 lowers by the drop-away voltage of the silicon diode 5 and a feeder 7. When the voltage VL of the load 8 is 51.68-52.22V, a load voltage detection circuit 10 actuates, and varies a setting center value from a center value 1 to a center value 2. Accordingly, the voltage VL of the load 8 moves from a to b, and the floating charging voltage VF moves from a' to b'.

9. 发明专利

JPS62105523A SWITCHING CIRCUIT 失效
公开(公告)号：JPS62105523A
公开(公告)日：1987-05-16
申请号：JP24605485
申请日：1985-11-01
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： OHASHI YASUO , KUWATA YUTAKA
IPC分类号： H03K17/60 , H03K17/56 , H03K17/567 , H03K17/687
摘要： PURPOSE:To eliminate the need for the driving signal of a bipolar TR and to simplify the circuit constitution of a circuit by using a current transformer which feeds back a current proportional to a load current to a bipolar transistor TR and an MOS-TR which cuts off the secondary-side current of the current transformer. CONSTITUTION:The bipolar TR 6 and the 1st MOS type TR 5 of a switching circuit are connected in parallel and the primary winding N1 of the current transformer 3 is connected between the parallel connection point and load 2. Further, the serial circuit of the secondary winding N2 of the current trans former 3 and the 2nd MOS type TR 4 is connected between the base and emitter of the TR 6, the gates of MOS type TRs 4 and 5 are connected to each other, and a diode 7 is connected between the connection point and the gate of the TR 6. Then, a current flowing from a DC current source 1 to the load 2 is fed back to the TR 6 by the current transformer 3, whose secondary current is cut off by the MOS type TR 4 to apply the driving signal to only the MOS type TRs 4 and 5, thereby performing fast switching operation with the simple circuit constitution.

10. 发明专利

JPS6243916A SWITCHING CIRCUIT 失效
公开(公告)号：JPS6243916A
公开(公告)日：1987-02-25
申请号：JP18374885
申请日：1985-08-21
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： OHASHI YASUO , KUWATA YUTAKA
IPC分类号： H03K17/567 , H03K17/56 , H03K17/60 , H03K17/687
摘要： PURPOSE:To quicken the switching speed and to decrease the voltage drop by connecting a MOS transistor (TR) in parallel with a series circuit composing of an inductor and a bipolar TR. CONSTITUTION:The inductor 3 and the bipolar TR 4 are connected in series and the MOS TR 5 is connected in parallel with the series circuit. Turning-on/ turning-off are realized by the high speed property of the MOS TR, the voltage drop is realized by a low voltage characteristic of the bipolar TR to constitute the switching circuit with very small switching loss. Further, a spike current caused by the parasitic capacitance of the bipolar TR and a reverse surge voltage generated between the base and emitter is suppressed. Thus, low switching loss, low noise and high reliability are attained.

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