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41. 发明专利

JPS57186977A CIRCUIT USING GATE TURN-OFF THYRISTOR 失效
公开(公告)号：JPS57186977A
公开(公告)日：1982-11-17
申请号：JP7205181
申请日：1981-05-13
申请人： HITACHI LTD
发明人： FUKUI HIROSHI , KIMURA ARATA , AMANO HISAO , YAO TSUTOMU
IPC分类号： H02M1/06 , H03K17/732
摘要： PURPOSE:To decrease the number of parts and the circuit loss and provide the high-speed response by a method wherein turn-off use limiting voltage of GTO thyristor is made equal to or greater than voltage between anode and cathode of the GTO thyristor at use state. CONSTITUTION:In V-1 characteristics of safety operation limiting region in high- current region, turn-off use limiting voltage VDRM is determined by voltage at intersection of current with zero axis and clamp voltage VAK is determined by voltage applied between anode and cathode in GTO cycle when the fall time is ended and the anode voltage comes to the steady state. Then VDRM>=VAK. By using the GTO cycle having the use limiting voltage VDRM equal to the clamp voltage VAK or more, large controllable current can be obtained even omitting a snubber circuit.

42. 发明专利

JPS57152729A GATE DRIVING CIRCUIT FOR SEMICONDUCTOR 失效
公开(公告)号：JPS57152729A
公开(公告)日：1982-09-21
申请号：JP3793581
申请日：1981-03-18
申请人： HITACHI LTD
发明人： ONDA KENICHI , ABE KIMIHITO , AMANO HISAO
IPC分类号： H02M1/08 , H03K17/04 , H03K17/567 , H03K17/687 , H03K17/695
摘要： PURPOSE:To enhance the switching speed of a MOSFET, by feeding back positively a voltage, which is generated between both ends of a load of the MOSFET, to the gate of the MOSFET. CONSTITUTION:When the output level of an inverter 4 is low, a transistor TR9 is turned off, and a high level is applied to the gate of a MOSFET3, and a floating capacity 11 is charged. When the FET3 starts turning on, a voltage is generated between both ends of a load 2 and is fed back positively to the gate of the FET3 through a transformer 8. Consequently, the FET8 is turned on in a high speed. When the output level of the inverter 4 is inverted, the TR9 is turned on, and the floating capacity 11 is discharged, and the voltage between both ends of the load 2 is fed back positively to the gate of the FET3, and the capacity 11 is discharged more rapidly. Sonsequently, the FET3 is turned off in a high speed.

43. 发明专利

JPS5650414A SWITCHING CIRCUIT 失效
公开(公告)号：JPS5650414A
公开(公告)日：1981-05-07
申请号：JP12537879
申请日：1979-10-01
申请人： HITACHI LTD , HITACHI METALS LTD
发明人： MATSUMURA TAKUJI , TOKUNAGA KIICHI , FUKUI HIROSHI , AMANO HISAO
IPC分类号： G05F1/10 , G05F1/56 , H02M3/28 , H02M7/12 , H02M7/155 , H02M7/537
摘要： PURPOSE:To protect the primary-side gate turn-off thyristor and so on from destruction, by detecting the primary-side voltage of a high-voltage transformer concerning the turning-on and-off type switching circuit of the electric range and so on whih is suitable to drive the load with a high voltage. CONSTITUTION:Since a current considerably larger than that for the normal time is flowed for the turning-on and-off time in the turning-on and-off type switching circuit, the secondary-side voltage of the high-voltage transformer is detected to control the oscillation time so that the passage current of gate turn-off thyristor GTO9 cannot exceed the limit determined by the smaller one of the excitation characteristic of the primary winding of high-voltage transformer 3 and the cut-off characteristic of thyristor GTO9. As a result, thyrstor GTO and so on can be protected from destruction for occurrence of the moding phenomenon and so on of magnetrons.

44. 发明专利

JPS563578A INVERTER DEVICE 失效
公开(公告)号：JPS563578A
公开(公告)日：1981-01-14
申请号：JP7681479
申请日：1979-06-20
申请人： HITACHI LTD
发明人： WATANABE KOUZOU , TOKUNAGA KIICHI , AMANO HISAO
IPC分类号： H02J3/38 , H02M7/493
摘要： PURPOSE:To enable parallel closing to be executed by making output voltage difference zero irrespective of load condition, by controlling output voltage and phase of an inverter prior to parallel closing in accordance with load condition of the inverter in on-load operation. CONSTITUTION:When an inverter 101 is in on-load operation and an inverter 102 is in non-load operation, the inverter 101's switch 22 becomes ON and a switch 22' becomes OFF. An output of a current detector 21 of the inverter 101 in this condition is impressed onto differential voltage detecting circuits 11 and 11' as an equally detected current value. These circuits 11 and 11' are provided with not only current detecting function but also current deviation detecting function, the control signal from these circuits controls phase through frequency control circuits 13 and 13' and also controls output voltage through voltage control circuits 14 and 14'. By using this mechanism, it is possible, irrespective of load condition of the inverter device, to execute parallel closing of the inverter at the time when the output voltage and the phase agree with each other most appropriately.

45. 发明专利

JPS55125076A OPTICAL IGNITION SYSTEM FOR THYRISTOR 失效
公开(公告)号：JPS55125076A
公开(公告)日：1980-09-26
申请号：JP3233779
申请日：1979-03-22
申请人： HITACHI LTD
发明人： KONISHI TOBUTAKE , YAO TSUTOMU , AMANO HISAO
IPC分类号： H02M1/092 , H03K17/78
摘要： PURPOSE:To lead LED light efficiently to optical fibers and thus to improve reliability of a general ignition system by arranging a band fiber consisting of plural optical fibers along an optical axis of the beam of light emitted from LED. CONSTITUTION:One end of a bundling optical fiber 30 which corresponds to an LED luminous face is arranged along an optical axis 200 of the beam of light emitted from the luminous face and also arranged so as to correspond to the major part of the luminous face. The fiber 30 branches to plural fibers on the way, and the branching fibers correspond to a light receiving part of each light driving thyristor.

46. 发明专利

JPS5549981A CONTROL PROTECTIVE SYSTEM FOR SEPARATELY EXCITED INVERTER DEVICE 失效
公开(公告)号：JPS5549981A
公开(公告)日：1980-04-11
申请号：JP12157478
申请日：1978-10-04
申请人： HITACHI LTD
发明人： KONISHI HIROO , AMANO HISAO
IPC分类号： G05F1/70 , H02M7/48 , H02M7/515
摘要： PURPOSE:To adjust voltage in a range that an inverter can control currents, by equivalently lowering the voltage of a direct current power source by means of a voltage regulator when alternating current voltage drops due to the trouble, etc. at an alternating current system to the extent beyond the controlling capacity of the inverter. CONSTITUTION:A voltage-voltage transducer 62 converts the output of an alternating current voltage transformer 61 into voltage signals (control signals), and a control circuit 63 manufactures signals for adjusting a voltage regulator 6 from the control signals. The characteristics of the output volatge of the voltage regulator 6 to the detecting value of the alternating current voltage are as follows; when voltage is in an alternating current range that can be controlled by means of an inverter, the output voltage of the voltage regulator is zero. When alternating current voltage becomes lower than the range, the output voltage rectilinearly increases. When voltage reaches the minimum alternating current voltage, the output voltage of the voltage regulator puts out voltage equal to the voltage of a direct current power source.

47. 发明专利

JPS54100285A ENERGY STORAGE SYSTEM USING SUPERCONDUCTIVE 失效
公开(公告)号：JPS54100285A
公开(公告)日：1979-08-07
申请号：JP623778
申请日：1978-01-25
申请人： HITACHI LTD
发明人： SAKURAI YOSHIMI , UEDA AKITERU , AMANO HISAO
IPC分类号： H01F6/00 , H01L39/14 , H02J15/00
摘要： PURPOSE:To realize an effective energy storage system which needs no superconductive switch and no supply of a large amount of the non-effective power from the system by switching the tap of the transformer. CONSTITUTION:Constant-conduction switch 12 is used to secure supply of the current of superconductive coil 1. To prevent the current attenuation caused by the loss of the current of coil 1, the rectifier is operated by switching the tap of transformer 7 for thyrsitor converter 3 which is used for excitation of coil 1 or for discharge of energy. Thus, the loss of the current is compensated. In such way, an effective energy storage is ensured with no supply of the non-effective power as well as no use of the superconductive switch.

48. 发明专利

JPS5436495A CONTROLLER OF FUSION DEVICE 失效
公开(公告)号：JPS5436495A
公开(公告)日：1979-03-17
申请号：JP10160177
申请日：1977-08-26
申请人： HITACHI LTD
发明人： UEDA AKITERU , AMANO HISAO , ISHIGAKI YUKIO , FUJII NORITOSHI
IPC分类号： G21B1/21 , G21B1/00 , H02M9/00 , H05H1/12
摘要： PURPOSE:To extinguish plasma current in a stabilized state by means of operating a convertor reversely of a recitifying device exciting the coil of a current transformer, and of returning the energy, of plasma to AC source.

49. 发明专利

JPS53126946A LIGHT GUIDE OF THYRISTOR VALVE 失效
公开(公告)号：JPS53126946A
公开(公告)日：1978-11-06
申请号：JP4136277
申请日：1977-04-13
申请人： HITACHI LTD
发明人： OZAWA ATSUSHI , KAKO YASUHIKO , KOBAYASHI SHIGEO , AMANO HISAO , IYOTANI RIYUUJI
IPC分类号： G02B6/00 , G02B6/42 , H01L31/0232 , H01L33/48
摘要： PURPOSE:To make possible the assurance of airtightness at the portion where a light guide passes through the wall of a vessel by butting and fixing the ends of a light guide connecting to a light emitting part and a light guide connecting to a light receiving part through a transparent plate.

50. 发明专利

JPS5368846A ELECTRIC POWER CONVERTER 失效
公开(公告)号：JPS5368846A
公开(公告)日：1978-06-19
申请号：JP14339276
申请日：1976-12-01
申请人： HITACHI LTD
发明人： ONDA KENICHI , TOKUNAGA KIICHI , AMANO HISAO
IPC分类号： G05F1/56
摘要： PURPOSE:To save a power loss promoting an improvement of efficiency, by such construction that for the driver unit for driving a gate of semiconductor element, a power be fed from the main power source when in a starting of the power converter and from the power conversion output after starting.

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