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1. 发明专利

JP2002164484A POWER CIRCUIT 失效
公开(公告)号：JP2002164484A
公开(公告)日：2002-06-07
申请号：JP2000362196
申请日：2000-11-29
申请人： HITACHI LTD , HITACHI CAR ENG CO LTD
发明人： YOSHIZAKI ATSUHIRO , MOTOBE MITSUSACHI , MASUNO KEIICHI
IPC分类号： H01L23/40 , H01L23/373
摘要： PROBLEM TO BE SOLVED: To provide a power circuit wherein an overvoltage protection is not required by suppressing parasitic reactance components and reliability is improved by improving a thermal resistance cycle. SOLUTION: Bus lines 50, 51, 52, 53, 54 of a power circuit wiring consists of a plurality of stacked flat conductors. A semiconductor device comprising a flat chip is sandwiched by a flat electric semiconductor device junction 58 and is bonded using a high heat and electric conductive adhesive 67 consisting of metal fillers and a resin, and the semiconductor device junction 58 is brought into contact with the bus lines 50, 51, 52, 53, 54 using the stacked wiring 57 of the flat conductors.

2. 发明专利

JP2001082980A RESOLVER PROCESSING DEVICE FOR ELECTRIC CAR 失效
公开(公告)号：JP2001082980A
公开(公告)日：2001-03-30
申请号：JP26318599
申请日：1999-09-17
申请人： HITACHI LTD , HITACHI CAR ENG CO LTD
发明人： KATAYAMA HIROSHI , YOSHIHARA SHIGEYUKI , MOTOBE MITSUSACHI , YOKOYAMA TETSUYA , HACHIMAN KOICHI , FUJIMOTO TAKASHI , KATADA HIROSHI
IPC分类号： G01B7/00 , G01B7/30 , G01D5/245
摘要： PROBLEM TO BE SOLVED: To minimize heat generation of a resolver processing device to prevent contact failure of a connector by making a power supply voltage of an excitation amplifier higher than power supply voltages of an excitation signal generator, an input signal processor, and an angle calculating portion. SOLUTION: A resolver 7 connects to a low-voltage-driven resolver processing circuit 1 and an exciting amplifier 9 through a connector 8, and a signal Vin 35 of chopping wave and an exciting current Ir 60 are inputted to the exciting amplifier 9. When this is made to flow through an exciting coil 50, a chopping wave signal proportional to the exciting current Ir 60 occurs in a resistor portion, and a square wave voltage proportional to a time change dIr/dt of the exciting current Ir 69 occurs in an inductance portion. A voltage Vro 34 formed by adding the chopping wave signal and the square wave voltage is added to the connector 8. The voltage Vro 34 is preferably high for insulation coating breaking of a terminal contact portion of the connector 8. A power supply voltage of the exciting amplifier 9 is a high voltage Vp as a separate system, and prevents saturation of an output voltage of the exciting amplifier 9.

3. 发明专利

JP2013085470A Inverter 有权
标题翻译：逆变器
公开(公告)号：JP2013085470A
公开(公告)日：2013-05-09
申请号：JP2012268939
申请日：2012-12-10
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： YAMADA KAZUJI , OGAWA TOSHIO , KAMIMURA NORITAKA , NAKAMURA TAKAYOSHI , MOTOBE MITSUSACHI
IPC分类号： H02M7/48 , H01L23/29 , H01L23/473 , H01L25/07 , H01L25/18
CPC分类号： H01L2224/45124 , H01L2224/48091 , H01L2224/48472 , H01L2224/73265 , H01L2924/1305 , H01L2924/13055 , H01L2924/30107 , H01L2924/3025 , H01L2924/00014 , H01L2924/00
摘要： PROBLEM TO BE SOLVED: To further improve reliability of a power module.SOLUTION: In a power module in which active elements 13, 14 soldered to an electrode 8 on one surface of a ceramic substrate 7 are sealed with resin 2, a conductor film 11 is formed on the other surface of the ceramic substrate 7, and the resin 2 comes up to the periphery of the conductor film 11.
摘要翻译：要解决的问题：进一步提高功率模块的可靠性。解决方案：在陶瓷基板7的一个表面上焊接到电极8的有源元件13,14用树脂2密封的电源模块中，在陶瓷基板7的另一个表面上形成导体膜11 ，树脂2到达导体膜11的周边。版权所有（C）2013，JPO＆INPIT

4. 发明专利

JP2002315386A CONTROLLER OF MOTOR 失效
公开(公告)号：JP2002315386A
公开(公告)日：2002-10-25
申请号：JP2001112137
申请日：2001-04-11
申请人： HITACHI LTD
发明人： KANEKO SATORU , MASAKI RYOZO , MOROOKA YASUO , MOTOBE MITSUSACHI , KATAYAMA HIROSHI
IPC分类号： B60L9/18 , B60K6/20 , B60K6/44 , B60K6/52 , B60L50/16 , B60W10/08 , B60W20/00 , H02P6/12 , H02P6/18 , H02P21/00 , H02P21/14 , H02P23/00 , H02P27/04 , H02P27/06 , B60L11/14 , H02P7/36 , H02P7/63
摘要： PROBLEM TO BE SOLVED: To provide a controller of motor in which the rotor pole position of the motor can be estimated with high response, high accuracy and high efficiency over the entire operating region of the motor. SOLUTION: The controller 4 for controlling a voltage, applied from an inverter 3 to a synchronous motor 1 by a PWM signal comprises means 9 for estimating the pole position, based on a current detection value of the synchronous motor 1 detected in synchronism with a PWM carrier, a pole position estimating means 10 for utilizing the equal potential state of the synchronous motor 1, and a pole position switching means 20 for switching the two types of pole position estimating means.

5. 发明专利

JP2001308246A POWER CONVERTER 失效
公开(公告)号：JP2001308246A
公开(公告)日：2001-11-02
申请号：JP2001016495
申请日：2001-01-25
申请人： HITACHI LTD
发明人： SUZUKI ATSUSHI , KUWABARA HEIKICHI , YASUKAWA AKIO , MOTOBE MITSUSACHI , YAMAMURA HIROHISA , OBARA SANSHIRO , SASAKI KANAME
IPC分类号： H05K7/20 , H01L23/473 , H02M7/48
摘要： PROBLEM TO BE SOLVED: To provide a power converter making water pouring possibility to an electric part including a semiconductor module zero by improving cooling performance by directly bringing cooling liquid into contact with a semiconductor module board. SOLUTION: A heat sink 1 has a cooling flow passage 2 and an opening part 5 provided to face a part of the flow passage, a first seal 9 exists on the outside of the opening part, a groove 6 exists on the outside of the first seal, liquid escape holes 7 communicating from the groove to the outside of the heat sink are discretely provided, a second seal 10 is provided on the outside of the groove 6, the upper part of the second seal or the outside of the second seal is attached by a tightening means and the radiation plate 104 of a semiconductor module is attached to the opening part 5.

6. 发明专利

JP2000152664A POWER CONVERTER WITH OVERVOLTAGE-PREVENTING DEVICE 失效
公开(公告)号：JP2000152664A
公开(公告)日：2000-05-30
申请号：JP32314398
申请日：1998-11-13
申请人： HITACHI LTD
发明人： KUBOTA YUZURU , FUTAMI MOTOO , ICHINOSE MASAYA , MOTOBE MITSUSACHI , KAYUKAWA SHIGEHIRO , HIGUCHI MIKISUKE
IPC分类号： H02M7/48 , H02M7/483 , H02M7/72 , H02P9/00
摘要： PROBLEM TO BE SOLVED: To prevent the overvoltage of a multiplex power converter and at the same time reduce the voltage load to a specific switching element by independently determining the operation/non-operation of a chopper circuit that is provided for each capacitor so that a DC voltage for each capacitor of a power converter can be set within a predetermined range. SOLUTION: When a DC differential voltage is generated between DC smoothing capacitors 5 and 7 when a system fails, an upper chopper circuit 6 and a lower chopper circuit 8 are operated and the energy of the DC smoothing capacitors 5 and 7 is discharged if a first predetermined voltage is exceeded, based on the DC voltage detection signal of the DC smoothing capacitors 5 and 7 by an upper control circuit 13 and a lower control circuit 14. When the level becomes lower than a second predetermined level, operation is stopped. As a result, by allowing each different chopper current to flow to the upper and lower chopper circuits 6 and 8, the upper and lower DC voltage is controlled a given value or less and the overvoltage of power converters 1 and 2 is prevented, thus reducing the load of voltage to a switching element.

7. 发明专利

JPH10191640A CONTROLLER FOR CONVERTER 失效
公开(公告)号：JPH10191640A
公开(公告)日：1998-07-21
申请号：JP34710096
申请日：1996-12-26
申请人： HITACHI LTD
发明人： KUBOTA YUZURU , MOTOBE MITSUSACHI , FUTAMI MOTOO , ICHINOSE MASAYA , HIGUCHI MIKISUKE
IPC分类号： H02M7/162 , H02M7/12 , H02M7/155 , H02M7/17 , H02M7/483 , H02M7/48
摘要： PROBLEM TO BE SOLVED: To suppress change of a DC output voltage by breaking down input voltages of two or more sets of converters connected in series to d-axis and q-axis components of rotary coordinate axes, controlling them, and correcting the q-axis component in response to a difference of the output voltages of the respective converters. SOLUTION: AC powers from an AC voltage 5 are converted into DC powers by converters 1, 2 via transformers 3, 4 and supplied to capacitors 6, 7 and load 8. In the case of controlling the converters 1, 2, it is converted into effective current Iq and reactive current Id based on a voltage reference phase detected from a sine wave generator 17, and input voltages of the converters 1, 2 are controlled by an effective current controller 20 and reactive current controller 21. Thus, phases of a power source voltage and power source current coincide, and power factor of the power source can be controlled to '1'. Simultaneously, an output of a voltage controller 15 is set to an effective current command Iq*, thereby maintaining a combined DC voltage E of the converters constantly.

8. 发明专利

JPH09238478A MULTIPLE POWER INVERTER AND ITS CONTROL METHOD 失效
公开(公告)号：JPH09238478A
公开(公告)日：1997-09-09
申请号：JP4606996
申请日：1996-03-04
申请人： HITACHI LTD
发明人： MIYAZAKI KIYOKO , ICHINOSE MASAYA , FUTAMI MOTOO , KUBOTA YUZURU , KIYOFUJI YASUHIRO , MOTOBE MITSUSACHI
IPC分类号： H02M7/48 , H02M7/483
摘要： PROBLEM TO BE SOLVED: To output an AC voltage faithful to a command, without changing a switching frequency, also when a voltage command of O vicinity at a low frequency continues. SOLUTION: A gate pulse generating circuit 3 has single phase gate pulse generating circuits wherein each phase is the same constitution. A triangular wave CARL and a triangular wave CARLL whose amplitude and frequency are two times those of CARL are generated. The respective triangular waves are compared with a command value VU. Intermediate pulse commands SUU1, 2 and SUL1, 2 are outputted which are 1 when VU is large and 0 when VU is small. An output pulse command SUU which becomes 1 by the quicker rise out of SUU1, 2 and becomes 0 by the quicker fall out of them. Similarly an output pulse command SUL is outputted from SUL1, 2. SUU and SUL pass gate drive circuits, and four gate pulses containing SUU, SUL and the respective inversion signals ignite/extinguish four ignition control elements of U phase of a main circuit, and executes dipole control when the command is 0 vicinity.

9. 发明专利

JPH08322269A CONTROLLER FOR POWER CONVERTER 失效
公开(公告)号：JPH08322269A
公开(公告)日：1996-12-03
申请号：JP14828495
申请日：1995-05-23
申请人： HITACHI LTD
发明人： FUTAMI MOTOO , KUBOTA YUZURU , MIYAZAKI KIYOKO , KIYOFUJI YASUHIRO , MOTOBE MITSUSACHI
IPC分类号： H02M7/72
摘要： PURPOSE: To suppress the wide fluctuation of a DC voltage by accurately detecting the electric energy flowing to a DC side through a power converter and precisely processing the electric energy in a normal state or even when such a disturbance occurs that an unbalanced voltage is generated on the AC side of the power converter or an unbalanced current flows to the AC side of the converter. CONSTITUTION: A controller for a power converter in which two converters 1 and 2 which convert a direct current or alternating current into an alternating current or direct current is provided with a current detecting means 5 which detects the AC-side current of the converter 1, voltage detecting means 9 which detects a pulsative voltage on the AC side of the converter 1, power detecting means 10 which detects the electric power flowing through the converter 1 from the current and voltage detected by the detecting means 5 and 9, and means which corrects commands to the converters 1 and 2 so that the same electric power as the detected electric power flowing through the converter 1 can flow through the converter 2.

10. 发明专利

JPH08154374A PROTECTION DEVICE OF POWER CONVERSION APPARATUS 失效
公开(公告)号：JPH08154374A
公开(公告)日：1996-06-11
申请号：JP31577494
申请日：1994-11-25
申请人： HITACHI LTD
发明人： NARITA HIROSHI , ONDA KENICHI , MOTOBE MITSUSACHI
IPC分类号： H02M1/00 , H02M7/12 , H02M7/155 , H02M7/515
摘要： PURPOSE: To obtain a protection device which can protect an over-current without making a fuse capacity large by a method wherein a reactor, for overcurrent suppression, to which a diode has been connected in parallel or a fuse is connected in series with a filter capacitor. CONSTITUTION: Normally, a difference current between a supply current on the side of a converter and a load current for an inverter flows to a filter capacitor (CF). Out of the difference current which flows to the CF, a charging current flows to a diode (DFU), and a discharge current flows to a reactor (LCF) for overcurrent suppression. In addition, in an ordinary operation, the charging current flows from the side of the converter, and the charging current flows to the side of the inverter. Normally, the load current flows via the LCF by removing a ripple portion by means of the current smoothing action of the LCF and the DFU. Then, when a phase short circuit is generated, an overcurrent in a discharge direction flows through the LCF from the CF. Then, the value of the LFU is set in such a way that a current flowing to a GTO thyristor in the phase short circuit becomes a surge-current withstand or lower. Thereby, it is possible to prevent the damage to the GTO thyristor due to the overcurrent in the phase short circuit.

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