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81. 发明专利

JP2000166096A POWER GENERATING SYSTEM 失效
公开(公告)号：JP2000166096A
公开(公告)日：2000-06-16
申请号：JP34133298
申请日：1998-12-01
申请人： HITACHI LTD
发明人： FUTAMI MOTOO , KUBOTA YUZURU , ICHINOSE MASAYA , MOTOBE MITSUSACHI , KAYUKAWA SHIGEHIRO , HIGUCHI MIKISUKE
IPC分类号： H02J15/00 , F03D9/00 , F03D9/02 , H02J3/28 , H02J3/32 , H02P9/14
摘要： PROBLEM TO BE SOLVED: To ensure stable power supply and reduce the capacity of a power converter, by converting DC power discharged from a power storage device into AC power with the power converter, and energizing a winding with AC power. SOLUTION: The stator winding of a winding type generator motor 1 is connected to an AC power system, and a rotor winding is connected to a battery 3 through a power converter 2. The power converter 2 prepares AC energizing current of variable frequency using the DC voltage of the battery 3, and supplies it to the rotor winding for energization, so that a generator is subjected to variable-speed operation. A windmill 9 is connected as a mechanical power source of the generator motor, and its wind force is converted into electric power to supply it to a system. It is thus possible to reduce the capacity of the power converter or the size of power generating system.

82. 发明专利

JPH11225500A CONTROLLER AND METHOD FOR VARIABLE SPEED GENERATOR-MOTOR 失效
公开(公告)号：JPH11225500A
公开(公告)日：1999-08-17
申请号：JP2334798
申请日：1998-02-04
申请人： HITACHI LTD , KANSAI ELECTRIC POWER CO
发明人： FUTAMI MOTOO , ICHINOSE MASAYA , KUBOTA YUZURU , MOTOBE MITSUSACHI , HIGUCHI MIKISUKE , ENDO MASAICHI , KATO YUICHI , NISHIO TORU , MOROMITSU AKIRA
IPC分类号： H02P9/00
摘要： PROBLEM TO BE SOLVED: To prevent excessive rise in power frequency, even when the power is lost during three-phase short circuit or when a generator-motor is cut off an AC power source. SOLUTION: This controller detects a slip phase, based on the phase of the rotor of a generator-motor and the phase of the power voltage detected with a power voltage phase detector 7 and excites the generator-motor 5, based on the slip phase. In this case, the power voltage phase detector 7 creates a power voltage phase value using the frequency approximately equal to the frequency of the power voltage made within, in place of the power phase detected value when it detects the amplitude of the power voltage falling below specified. Hereby, even in power loss during three-phase short circuit of the power source, an output voltage of the generator-motor of specified frequency can be output.

83. 发明专利

JPH10295097A CONTROLLER AND CONTROL METHOD FOR VARIABLE SPEED GENERATOR MOTOR 失效
公开(公告)号：JPH10295097A
公开(公告)日：1998-11-04
申请号：JP10003697
申请日：1997-04-17
申请人： HITACHI LTD
发明人： FUTAMI MOTOO , ICHINOSE MASAYA , KUBOTA YUZURU , MOTOBE MITSUSACHI , HIGUCHI MOTOHIRO , ENDO MASAICHI
IPC分类号： H02P9/00 , H02P9/14
摘要： PROBLEM TO BE SOLVED: To stabilize electric power by adjusting effective power of generator motor by controlling a current phase of a variable frequency, and adjusting the output of effective power control means, depending on the fluctuation in AC frequency of an almost fixed frequency. SOLUTION: In order to control the effective power, an effective power- adjusting equipment 2 outputs a q-axis current command as its control output, and an AC voltage adjusting equipment 8 outputs a d-axis current command as its control output for controlling the AC voltage. In the excitation controller 3, a current in the d-axis direction and a current in the q-axis direction detected by an excitation current detection equipment 9 are controlled in such a manner that these currents match with respectively the outputs of the AC voltage controller 8 and the effective power adjusting equipment 2. For instance, if the generated energy from a generator connected to the system becomes excessive due to a sudden change in the load and the generator is accelerated and the frequency in the power system has risen, then the generator motor 11 absorbs the effective power and absorb surplus power, by which the frequency fluctuation can be restricted.

84. 发明专利

JPH1042588A CONTROLLER FOR MOTOR AND VARIABLE-SPEED GENERATOR 失效
公开(公告)号：JPH1042588A
公开(公告)日：1998-02-13
申请号：JP19179496
申请日：1996-07-22
申请人： HITACHI LTD
发明人： FUTAMI MOTOO , KUBOTA YUZURU , ICHINOSE MASAYA , MOTOBE MITSUSACHI , HIGUCHI MIKISUKE
IPC分类号： H02J3/38 , H02J3/26 , H02P21/05 , H02P21/22 , H02P23/00 , H02P23/04 , H02P23/07 , H02P27/05 , H02P7/52
摘要： PROBLEM TO BE SOLVED: To minimize the influence of the negative-phase-sequence components of primary voltage, by converting the negative-phase-sequence components in the primary-side voltage of a motor into secondary-side alternating-current part, and superposing the secondary-side alternating-current part on the alternating-current voltage applied from the secondary side as high-frequency voltage. SOLUTION: The voltage vector of the negative-phase-sequence components in the primary- side voltage of a motor 9 is detected using a negative-phase-sequence component detector 1. The phase of the negative-phase-sequence voltage components is detected through a negative- phase-sequence voltage phase detector 15. A secondary induced voltage converter 2 detects the induced voltage, corresponding to the negative-phase-sequence components in the voltage, and a compensating voltage generator 3 creates a voltage command to a frequency converter 8, so as to cancel out the induced voltage. A compensating phase detector 16 detects the rotor-side phase of the negativephase-sequence voltage from slip phase and negative-phase- sequence voltage phase, and a three-phase converter 4 divides the negative-phase-sequence compensating voltage into three phases to create a voltage command correction value. Since compensation can be made before a current due to the induced voltage starts to flow, therefore, it is possible to eliminate the effects of the negative-phase-sequence components without phase delay.

85. 发明专利

JPH09198124A MULTIPLEX CONTROLLER 失效
公开(公告)号：JPH09198124A
公开(公告)日：1997-07-31
申请号：JP710996
申请日：1996-01-19
申请人： HITACHI LTD
发明人： ICHINOSE MASAYA , FUTAMI MOTOO , KUBOTA YUZURU , HIGUCHI MIKISUKE , MOTOBE MITSUSACHI
IPC分类号： G05B9/03 , G05B23/02 , G05F1/10 , H02M1/08 , H02M7/48
摘要： PROBLEM TO BE SOLVED: To provide a controller judging an error by judging and evaluating an arithmetic result independently of other control systems at the time of duplexing a control system of which output is an analog quantity or the like. SOLUTION: A control system 1 and a control system 1' are provided with the same function and one signal is duplexed as 100 and 101 and respectively inputted to the control system 1 and the control system 1'. The control system 1 and the control system 1' respectively process and prepare an error detection code with respect to an input signal and output the analog control signals 2 and 2' and the error signals 3 and 3' of a control arithmetic result. In addition a judging part 4 receives an error code and the result of control arithmetic from the control system 1 and the control system 1' and outputs a correct control signal 102.

86. 发明专利

JPH07131936A DC TRANSMISSION CONTROLLER 失效
公开(公告)号：JPH07131936A
公开(公告)日：1995-05-19
申请号：JP27356193
申请日：1993-11-01
申请人： HITACHI LTD
发明人： SUGIURA YASUYUKI , UEDA SHIGETA , MOTOBE MITSUSACHI
IPC分类号： H02J1/00 , H02J3/36
摘要： PURPOSE:To perform the power control inclusive of the direction of the power flow by controlling the voltage of a converter, which mainly supplies power, and its DC terminal to be constant, and performing the constant control of power, according to circulation power, in respect of other converters, in case that there are plurality of self exciting power converters being coupled through a DC line. CONSTITUTION:For example, the power converter of a power receiver and transmitter 1 performs DC constant control by a voltage controller 49, and besides the power converters of power receiver and transmitters 2, 3,...47, and 48 control the circulation power of power converters, according to the directions required by the system and necessary power by means of circulation voltage controllers 52, 54, 56, and 58. And, a voltage controllers 46 changes over switches 59-63 and changes over one unit into DC voltage constant control out of other residual power converters in case that the power converter to perform DC voltage fixed control goes wrong, and other power converters controls the power of power converters, according to the direction required by the system and power.

87. 发明专利

JPH0681514B2 失效
公开(公告)号：JPH0681514B2
公开(公告)日：1994-10-12
申请号：JP24206889
申请日：1989-09-20
申请人： HITACHI LTD
发明人： IKIMI TAKASHI , MOTOBE MITSUSACHI , KUBOTA YUZURU , TOBARI KAZUAKI , KAMYAMA KENZO
IPC分类号： H02M7/48 , H02P27/06 , H02P7/63

88. 发明专利

JPH067754B2 失效
公开(公告)号：JPH067754B2
公开(公告)日：1994-01-26
申请号：JP14812583
申请日：1983-08-15
申请人： HITACHI LTD
发明人： NAGASE HIROSHI , MOTOBE MITSUSACHI
IPC分类号： H02P27/06 , H02P21/00 , H02P21/05 , H02P21/22 , H02P23/04 , H02P23/07 , H02P23/16 , H02P27/04 , H02P27/08 , H02P5/408

89. 发明专利

JPH04351476A POWER CONVERSION DEVICE CONTROLLER AND SWITCHING ELEMENT CONTROLLER 失效
公开(公告)号：JPH04351476A
公开(公告)日：1992-12-07
申请号：JP12731291
申请日：1991-05-30
申请人： HITACHI LTD
发明人： UEDA SHIGETA , MOTOBE MITSUSACHI , NARITA HIROSHI , IYOTANI RYUJI , HONDA KAZUO
IPC分类号： H02M1/06 , H02M7/515
摘要： PURPOSE:To suppress the difference between voltage values to be allotted individually by a plurality of semiconductor switching elements connected each other in series. CONSTITUTION:ON/OFF state signals S1 to Sn from voltage detectors 501 to 50n for detecting ON/OFF state GTO1 to n connected in series each other, voltage allotment state monitor circuits 401 to 40n, a delay circuit 1200 for delaying reference ON/OFF signal P0 for a certain duration, and the voltage allotment state monitor circuits 401 to 40n are compared to a delay reference signal P1 from a delay circuit 1200, and an amount of delay is created and this is equal to the timing deviation during ON/OFF of each GTO. This amount of delay is added to the reference ON/OFF signal P0 and gate signals G1 to Gn are generated in pulse delay circuit 201 to 20n; a gate signal corresponding to a large amount of delay is given to a GTO having a rapid switching timing; a gate signal corresponding to a small amount of delay is given to a GTO having delayed switching timing; and as a result, the switching timing for each GTO is coincided.

90. 发明专利

JPH0437669B2 失效
公开(公告)号：JPH0437669B2
公开(公告)日：1992-06-22
申请号：JP1011884
申请日：1984-01-25
申请人： HITACHI LTD
发明人： MOTOBE MITSUSACHI , UEDA SHIGETA , SUZUKI KATSUNORI , MATSUDA YASUO
IPC分类号： H02M1/084 , H02M7/06 , H02M7/155 , H02M7/162
摘要： @ Disclosed is a control circuit (5) for a power converter apparatus using self-extinction devices (S u - S Z ) as switching devices, in which turn on and turn off operations of the self-extinction devices are controlled by gate pulses (P u - P z ) which have been subject to pulse width modulation with a pulse train having a pulse width which is sinusoidally varied, and, at the same time, the self-extinction devices in same phase are made conductive in a predetermined period (S) corresponding to an output voltage reference value to make an output of the power converter apparatus be in a shorted state in the sense of DC current to thereby control the output of the power converter apparatus.

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