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1. 发明专利

JPS61262821A SYSTEM FOR CONTROLLING POWER SOURCE OUTPUT 失效
公开(公告)号：JPS61262821A
公开(公告)日：1986-11-20
申请号：JP10351485
申请日：1985-05-15
申请人： ORIGIN ELECTRIC , NIPPON TELEGRAPH & TELEPHONE
发明人： KUWATA YUTAKA , SAKAKIBARA KAZUHIKO , SUZUKI YOSHIO , SAITO RYOJI , SENOO KAZUHIRO , KII YASUO
IPC分类号： H02J1/10 , G05F1/00 , G05F1/10
摘要： PURPOSE:To obtain an efficient and stable control system by outputting and controlling each output voltage in a constant voltage control range with the aid of a detection current signal available from detecting the outputs of DC power sources when the outputs of the power sources obtained by connecting and running plural DC power sources in parallel are controlled. CONSTITUTION:After output currents I and I' detected by current detectors 3 and 3' are converted into voltages by converters 4 and 4', they are supplied to adders 5 and 5' and added to output voltages. The added outputs are supplied to error amplifiers 7 and 7', and compared with reference voltages 6 and 6', after which they are supplied as control signals to control circuits 8 and 8'. Their output signals control the conduction of main circuits 9 and 9' to obtain constant voltage outputs.

2. 发明专利

JPH01231662A DC POWER SUPPLY 失效
公开(公告)号：JPH01231662A
公开(公告)日：1989-09-14
申请号：JP5556188
申请日：1988-03-09
申请人： ORIGIN ELECTRIC , NIPPON TELEGRAPH & TELEPHONE
发明人： AOKI CHUICHI , KUWATA YUTAKA , SAITO RYOJI , USHIKI SHUICHI
IPC分类号： H02M7/06 , H02M5/14 , H02M5/297 , H02M7/12 , H02M7/219
摘要： PURPOSE:To decrease the number of voltage conversion stages and to improve the efficiency of conversion, by converting an AC voltage from a three phase AC power source directly into a high frequency AC voltage. CONSTITUTION:A DC power supply is composed of an input filter 3 for a three- phase AC power source, a transformer 5, an output rectifier 6, an output filter 7 and others to supply a load 8 with power. In this case, said power supply is provided with a switching part 10 and a control circuit 11 to switch AC voltage from said three-phase AC power source 1 at a higher frequency by said switching part 10 via said input filter 3. Then, a high frequency AC voltage is generated on the output side of said transformer 5. Also, said control circuit 11 detects each line voltage from the three-phase AC power source 1, controls the ON pulse width of semiconductor switches 12-17 between respective lines so that said pulse width is proportional to said line voltage, and determines which switch to be turned ON. Thus, the efficiency of conversion is improved, because said AC voltage can be directly converted into a high frequency AC voltage.

3. 发明专利

JPS6216066A OUTPUT DROOPING METHOD FOR POWER CONVERTER 失效
公开(公告)号：JPS6216066A
公开(公告)日：1987-01-24
申请号：JP15151585
申请日：1985-07-10
申请人： ORIGIN ELECTRIC , NIPPON TELEGRAPH & TELEPHONE
发明人： SUZUKI YOSHIO , KUWATA YUTAKA , MUROYAMA SEIICHI , ASAMI SHINICHIRO , SAITO RYOJI , SENOO KAZUHIRO
IPC分类号： H02M3/155 , H02M3/00 , H02M3/156 , H02M3/28
摘要： PURPOSE:To reduce a ripple component amount by lowering the reference voltage of a DC output voltage detection system in response to the magnitude of a signal corresponding to a difference between a detecting signal levelled in response to output currents and a set level when the detecting signal exceeds the set level. CONSTITUTION:An output from an AC power supply 1 is lead out as a DC output through a rectifying circuit 2, a filter circuit 3, a transformer 5 for converting power, a rectifying circuit 7 and a filter circuit 8. DC output currents rectified and levelled by the rectifying circuit 7 and the filter circuit 8 are detected by a current detecting means 19, an output from the means 19 is inputted to an operational amplifier 20, and the reference voltage of a DC output voltage detection system variable reference power supply 14 is varied by an output from the operational amplifier 20. That is, when a current detecting signal exceeds a set level, reference voltage is lowered in response to the magnitude of a signal corresponding to a difference between the current detecting signal and the set level.

4. 发明专利

JPS6211914A DEAD LOAD CONTROL METHOD FOR CONVERTER 失效
公开(公告)号：JPS6211914A
公开(公告)日：1987-01-20
申请号：JP15151685
申请日：1985-07-10
申请人： ORIGIN ELECTRIC , NIPPON TELEGRAPH & TELEPHONE
发明人： SUZUKI YOSHIO , KUWATA YUTAKA , ASAMI SHINICHIRO , SAITO RYOJI , SATO KEIICHI
IPC分类号： G05F1/613
摘要： PURPOSE:To reduce the electric power loss during the light load and to improve the reduction effect especially in a parallel operation mode and at the same time to prevent a hunting phenomenon due to the hysteresis characteristics, by providing a dead load and a variable impedance element connected in series. CONSTITUTION:When the output voltage level rises up to a dead load application point A in a light load state, an operational amplifier 7 delivers a difference signal having a level equivalent to the difference between the reference voltage level and the detecting voltage level of the output voltage to a driving circuit 8. The circuit 8 applies a control signal having a level corresponding to said difference signal to a variable impedance element 4 for linear control of the impedance. Thus the impedance of the element 4 is controlled so that the sum of the load current flowing to a load 2 and the dead load current flowing via a dead load 5 connected in series to the element 4 is approximately equal to the current I3 at a point A within a range between the point A and a no-load point. Therefore the output voltage is approximately equal to the voltage V3 at the point A within a range between the point A and the no-load point. This reduces the electric power loss and especially improves the reduction effect in a parallel operation mode. Then it is possible to prevent a hunting phenomenon caused by the hysteresis characteristics.

5. 发明专利

JPH10210747A SWITCHING POWER SOURCE AND ITS CONTROL METHOD 失效
公开(公告)号：JPH10210747A
公开(公告)日：1998-08-07
申请号：JP2597997
申请日：1997-01-24
申请人： ORIGIN ELECTRIC
发明人： TAGUCHI TAKAYUKI , SAITO RYOJI
IPC分类号： H02M3/28
摘要： PROBLEM TO BE SOLVED: To provide a switching power source which can reset a transformer without fail and besides, can reduce power loss, without increasing circuit parts. SOLUTION: This power source is equipped with a switching semiconductor element 3 which selectively opens and closes the current path leading to load 10 from a DC power source 1, a switching means which is connected in series to the switching semiconductor element 3, a diode 4 and a voltage clamp capacitor 5 which are connected in parallel with the switching semiconductor element 3 and besides are connected in series with each other, and a control circuit 13 which controls the switching of the switching semiconductor element 3. In this case, the diode 4 has a carrier life time over the time equivalent to the switching cycle of the switching semiconductor element 3, and this is equipped with a discharge circuit 11 which can adjust the quantity of energy returned to the DC power 1 from the voltage clamp capacitor 5 so that the voltage of the voltage clamp capacitor 5 may not get over the set voltage, between the junction between the voltage clamp capacitor 5 and the diode 4 and one end of the DC power source 1.

6. 发明专利

JPH0683573B2 失效
公开(公告)号：JPH0683573B2
公开(公告)日：1994-10-19
申请号：JP7141688
申请日：1988-03-25
申请人： ORIGIN ELECTRIC
发明人： TERAMOTO SUSUMU , SAITO RYOJI
IPC分类号： H02M3/28

7. 发明专利

JPH0327768A CONTROL METHOD FOR RESONANT DC-DC CONVERTOR 失效
公开(公告)号：JPH0327768A
公开(公告)日：1991-02-06
申请号：JP16241489
申请日：1989-06-23
申请人： ORIGIN ELECTRIC
发明人： SAITO RYOJI , SENOO KAZUHIRO , ITO MIKIO
IPC分类号： H02M3/28 , H02M3/335
摘要： PURPOSE:To remove power loss by performing the charge and discharge of the parasitic capacitor of a switching semiconductor element by the accumulated electromagnetic energy of inductance. CONSTITUTION:A resonant DC-DC convertor is constituted of main MOSFET switches 3 and 4, resonant capacitors 9 and 10, an resonant inductor 13, a transformer 14, a rectifying circuit 29, etc., and this supplies power to a load 21. Moreover, this is equipped with voltage monitoring circuits 15 and 16 for the main switches 3 and 4, driving circuits 17 and 18, a controller 20, and a voltage detection circuit. The energies of a parasitic capacitors 5 and 6 of the main switches 3 and 4 are supplied by the energy accumulated in an inductor 13.

8. 发明专利

JP2002153067A HIGH POWER FACTOR CONVERTER AND METHOD OF CONTROLLING THE SAME 失效
公开(公告)号：JP2002153067A
公开(公告)日：2002-05-24
申请号：JP2000341074
申请日：2000-11-08
申请人： ORIGIN ELECTRIC , TOKYO ELECTRIC POWER CO
发明人： USHIKI SHUICHI , SAITO RYOJI , OSHIMA MASAAKI
IPC分类号： H02M7/12
摘要： PROBLEM TO BE SOLVED: To provide a high power factor converter which realizes the control in the power factor of almost 1 without generating a distortion due to a noise from an internal circuit in an input current to a voltage step-up and rectifying circuit. SOLUTION: This converter comprises switch elements X, Y connected in parallel to the diodes DX, DY of a diode bridge to which an AC element is supplied via a current control inductor 2, a voltage step-up and rectifying circuit 1 consisting of a smoothing capacitor Cd, an inductor current detector 11 for measuring an actual AC current value applied to the voltage step-up and rectifying circuit, an output voltage detecting circuit 7 for measuring a constant current from the voltage step-up and rectifying circuit 1, an output voltage detecting circuit 8 for measuring a DC voltage from the voltage step-up and rectifying circuit 1, an input current instruction value determination circuit 10 for obtaining an AC target current value based on the reference sine-wave, an integral circuit 13 for obtaining an error of the target current value and actual AC current value to integrate an error with an integral time Ts and then output this integrated value, and a control circuit C for controlling ON and OFF the switch elements X, Y with the integral value.

9. 发明专利

JPH0335883A CHARGING AND DISCHARGING CIRCUIT FOR CAPACITOR 失效
公开(公告)号：JPH0335883A
公开(公告)日：1991-02-15
申请号：JP16903289
申请日：1989-06-30
申请人： ORIGIN ELECTRIC
发明人： NEO SHIGERU , SAITO RYOJI , SHIMADA JUNKICHI
IPC分类号： B23K11/26
摘要： PURPOSE:To improve stability and reproducibility of welding conditions by charging at a value slightly lower than the specified voltage by a main charging circuit to execute phase control charging from an AC power source, superimpos ing the voltage of the difference from an auxiliary charging circuit to execute charging. CONSTITUTION:The set voltage of the main charging circuit 100 is set lower by several ten % than the desired charging voltage of a capacitor 300. The auxiliary charging circuit 210 is then set at the voltage of the difference between the desired charging voltage and the set voltage of the main charging circuit 100. The sum of a current of these two charging circuits charges the capacitor 300. The change in the lapse of time of the charging voltage of the capacitor 300 is controlled so that the sum of the current of the two charging circuits is made to the desired charging voltage. When the inputted voltage rises sudden ly, although the charging voltage rises, the set voltage of the main charging circuit 100 is set lower by several ten % than the desired charging voltage, so it does not exceed the desired charging voltage. At this time, the output voltage of the auxiliary charging circuit 210 drops responsibly quickly and the desired charging voltage of the main charging circuit 100 is maintained.

10. 发明专利

JPH01243849A METHOD OF CONTROLLING RESONANCE CONVERTER 失效
公开(公告)号：JPH01243849A
公开(公告)日：1989-09-28
申请号：JP7141688
申请日：1988-03-25
申请人： ORIGIN ELECTRIC
发明人： TERAMOTO SUSUMU , SAITO RYOJI
IPC分类号： H02M3/28
摘要： PURPOSE:To prevent breakdown of elements and reduction of efficiency from the title converter, by detecting a set point arrival time of resonance capacitor voltage, by turning ON a semiconductor switch and by supplying energy to a drive circuit from a drive winding of a transformer. CONSTITUTION:A control device of a resonance capacitor is composed of a semiconductor switch 2 by FET, a transformer 3 having an input winding N1, an output winding N2 and a drive winding N3, a rectification-smoothing circuit 4, a starting circuit 6, a resonance voltage detection circuit 7, a peak current detection circuit 8, a drive circuit 9, an output voltage detection circuit 10, etc. By turning ON and OFF DC input supply voltage 1 with the semiconductor switch 2, the current is supplied to a load 5 through the output winding N2 of the transformer 3 and the rectification-smoothing circuit 4. At this time, when the voltage of a resonance capacitor C0 detects the set point arrival time, the abovementioned switch 2 is turned ON. When the output voltage gets to the set point then, it is forcibly turned OFF.

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