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1. 发明专利

DE69408734T2 未知
公开(公告)号：DE69408734T2
公开(公告)日：1998-11-05
申请号：DE69408734
申请日：1994-06-14
申请人： HITACHI LTD
发明人： HORIE AKIRA , SAITOU SYUUJI , MATUI TAKAYUKI , ITOH KEN , TSUBOI TAKASHI , TOYOTA EIICHI
IPC分类号： B60L15/00 , B60L3/00 , B60L9/00 , H02M7/04 , H02M7/48
摘要： In a power converter, the inverter device casing (20) and a heat receiving plate (18a, 18b) are insulated, and the heat receiving plate (18a, 18b) and a filter capacitor (7) are connected through a predetermined inductance. Since higher-harmonic current is bypassed to the filter capacitor (7) through a resonance filter which is constructed of the electrostatic capacity in a switching element and an inductance, induction trouble, which might otherwise be caused by higher-harmonic current leaking to the outside of an inverter device, can be reduced by a simple construction.

2. 发明专利

BR9703583A 未知
公开(公告)号：BR9703583A
公开(公告)日：1998-07-07
申请号：BR9703583
申请日：1997-06-16
申请人： HITACHI LTD
发明人： SAITOU SYUUJI , TERASAWA KIYOSHI , NAKATA KIYOSHI
IPC分类号： H02H7/12 , G01R31/26 , H02H20060101 , H02H7/16 , H02M7/00 , H02M7/48 , H02M7/483 , H02M7/5387 , H02P27/08
摘要： PROBLEM TO BE SOLVED: To stably discriminate the drop in the capacitance of a capacitor with high accuracy, by comparing the detected alternating voltage fluctuation at an intermediate potential point of a voltage-dividing capacitor with a reference value. SOLUTION: A capacitor capacitance-discriminating circuit 6 is constituted of an AC component detector 61 which detects the AC component of a neutral point voltage, maximum value detector 62 which detects the maximum amplitude value of the AC component, a first comparator 63, a second comparator 64, and a memory 65 in which the hysteresis of the amplitude value of an AC voltage is recorded. The detector 61 detects the AC component, contained in the neutral point voltage, and the detector 62 detects the maximum amplitude value of the neutral point voltage and, at the same time, amplitude value of the neural point voltage in the operating state of a three-level power converter which changes from moment to moment. The comparator 63 compares the detected result of the detector 62 with the reference allowable value 1 of a modulation rate ΔE and, when the result is larger than the value 1, outputs '1' to an output CC1 and a display 7 displays that the capacitance of a capacitor has become lower, when the CC1 becomes '1'. Therefore, the capacitance of the capacitor can be discriminated stably with high accuracy without being affected by the condition of an external circuit.

3. 发明专利

ZA955748B Electric power conversion device for alternating electric car 未知
公开(公告)号：ZA955748B
公开(公告)日：1996-02-20
申请号：ZA955748
申请日：1995-07-11
申请人： HITACHI LTD , HITACHI MITO ENG KK
发明人： ANDO TAKESHI , HORIE AKIRA , SAITOU SYUUJI , TAKAKU TOSHIHIKO , TAKASAKI TOSHIO
IPC分类号： H02M7/219 , B60L9/24 , B60L15/00 , H02M7/00 , H02M7/04 , H02M7/12 , H02M7/48 , B60L
摘要： In order to decrease the size of an electric power conversion device for a PWM converter/inverter electric car sharing a PWM converter (7a,7b,7c,7d) and a PWM inverter (7e,7f,7g), a main circuit unit is constructed by combining at least one phase portion (7a) of the PWM converter and at least one phase portion (7e) of the PWM inverter, and each of the main circuit unit has a cooling device (18,19) common to the converter and inverter.

4. 发明专利

AU2485695A Electric power conversion device for alternating electric car 未知
公开(公告)号：AU2485695A
公开(公告)日：1996-02-01
申请号：AU2485695
申请日：1995-07-05
申请人： HITACHI LTD , HITACHI MITO ENGINEERING CO LTD
发明人： ANDO TAKESHI , HORIE AKIRA , SAITOU SYUUJI , TAKAKU TOSHIHIKO , TAKASAKI TOSHIO
IPC分类号： H02M7/219 , B60L9/24 , B60L15/00 , H02M7/00 , H02M7/04 , H02M7/12 , H02M7/48 , H02M5/04 , B60L15/20 , H02J3/46
摘要： In order to decrease the size of an electric power conversion device for a PWM converter/inverter electric car sharing a PWM converter (7a,7b,7c,7d) and a PWM inverter (7e,7f,7g), a main circuit unit is constructed by combining at least one phase portion (7a) of the PWM converter and at least one phase portion (7e) of the PWM inverter, and each of the main circuit unit has a cooling device (18,19) common to the converter and inverter.

5. 发明专利

DE69313340T2 未知
公开(公告)号：DE69313340T2
公开(公告)日：1998-03-05
申请号：DE69313340
申请日：1993-04-20
申请人： HITACHI LTD
发明人： NAKATA KIYOSHI , TANAMACHI TOKUNOSUKE , TERUNUMA MUTSUHIRO , SUZUKI MASATO , NAKAMURA KIYOSHI , TOYOTA EIICHI , SAITOU SYUUJI , MATSUI TAKAYUKI
IPC分类号： B60L9/22 , H02M7/48 , H02M7/497
摘要： Disclosed is an apparatus for realizing a small apparatus by making element currents uniform in the dipolar modulation mode. The zero voltage period in the dipolar modulation period is made shorter than other voltage output periods. Accordingly, currents of switching elements constituting the main circuit of an inverter can be made uniform.

6. 发明专利

AU2370697A Capacity judging apparatus of capacitor in power converter outputting three level voltage 未知
公开(公告)号：AU2370697A
公开(公告)日：1998-01-08
申请号：AU2370697
申请日：1997-05-29
申请人： HITACHI LTD
发明人： NAKATA KIYOSHI , TERASAWA KIYOSHI , SAITOU SYUUJI
IPC分类号： H02H7/12 , G01R31/26 , H02H20060101 , H02H7/16 , H02M7/00 , H02M7/48 , H02M7/483 , H02M7/5387 , H02P27/08
摘要： PROBLEM TO BE SOLVED: To stably discriminate the drop in the capacitance of a capacitor with high accuracy, by comparing the detected alternating voltage fluctuation at an intermediate potential point of a voltage-dividing capacitor with a reference value. SOLUTION: A capacitor capacitance-discriminating circuit 6 is constituted of an AC component detector 61 which detects the AC component of a neutral point voltage, maximum value detector 62 which detects the maximum amplitude value of the AC component, a first comparator 63, a second comparator 64, and a memory 65 in which the hysteresis of the amplitude value of an AC voltage is recorded. The detector 61 detects the AC component, contained in the neutral point voltage, and the detector 62 detects the maximum amplitude value of the neutral point voltage and, at the same time, amplitude value of the neural point voltage in the operating state of a three-level power converter which changes from moment to moment. The comparator 63 compares the detected result of the detector 62 with the reference allowable value 1 of a modulation rate ΔE and, when the result is larger than the value 1, outputs '1' to an output CC1 and a display 7 displays that the capacitance of a capacitor has become lower, when the CC1 becomes '1'. Therefore, the capacitance of the capacitor can be discriminated stably with high accuracy without being affected by the condition of an external circuit.

7. 发明专利

ZA9705118B Capacity judging apparatus of capacitor in power converter outputting three level voltage. 未知
公开(公告)号：ZA9705118B
公开(公告)日：1997-12-31
申请号：ZA9705118
申请日：1997-06-10
申请人： HITACHI LTD
发明人： NAKATA KIYOSHI , TERASAWA KIYOSHI , SAITOU SYUUJI
IPC分类号： H02H7/12 , G01R31/26 , H02H20060101 , H02H7/16 , H02M7/00 , H02M7/48 , H02M7/483 , H02M7/5387 , H02P27/08 , H02H

8. 发明专利

AU664434B2 Control apparatus of power converter and control apparatus of electric motor vehicle 未知
公开(公告)号：AU664434B2
公开(公告)日：1995-11-16
申请号：AU3701893
申请日：1993-04-20
申请人： HITACHI LTD
发明人： NAKATA KIYOSHI , TANAMACHI TOKUNOSUKE , TERUNUMA MUTSUHIRO , SUZUKI MASATO , NAKAMURA KIYOSHI , TOYOTA EIICHI , SAITOU SYUUJI , MATSUI TAKAYUKI
IPC分类号： B60L9/22 , H02M7/48 , H02M7/497 , H02M7/44 , H02M7/527
摘要： Disclosed is an apparatus for realizing a small apparatus by making element currents uniform in the dipolar modulation mode. The zero voltage period in the dipolar modulation period is made shorter than other voltage output periods. Accordingly, currents of switching elements constituting the main circuit of an inverter can be made uniform.

9. 发明专利

ZA9404472B Power converting device for reducing induction trouble 未知
公开(公告)号：ZA9404472B
公开(公告)日：1995-02-15
申请号：ZA9404472
申请日：1994-06-22
申请人： HITACHI LTD
发明人： HORIE AKIRA , SAITOU SYUUJI , MATUI TAKAYUKI , ITOH KEN , TSUBOI TAKASHI , TOYOTA EIICHI
IPC分类号： B60L15/00 , B60L3/00 , B60L9/00 , H02M7/04 , H02M7/48 , B60L
CPC分类号： B60L15/007 , B60L3/00 , B60L9/00 , B60L2200/26 , B60L2220/12 , Y02T10/644 , Y02T10/645 , Y10T307/707

10. 发明专利

ZA932797B Control apparatus of power converter and control apparatus of electric motor vehicle 未知
公开(公告)号：ZA932797B
公开(公告)日：1993-11-16
申请号：ZA932797
申请日：1993-04-21
申请人： HITACHI LTD
发明人： NAKATA KIYOSHI , TANAMACHI TOKUNOSUKE , TERUNUMA MUTSUHIRO , SUZUKI MASATO , NAKAMURA KIYSOHI , TOYOTA EIICHI , SAITOU SYUUJI , MATSUI TAKAYUKI
IPC分类号： B60L9/22 , H02M7/48 , H02M7/497 , H02M
摘要： Disclosed is an apparatus for realizing a small apparatus by making element currents uniform in the dipolar modulation mode. The zero voltage period in the dipolar modulation period is made shorter than other voltage output periods. Accordingly, currents of switching elements constituting the main circuit of an inverter can be made uniform.

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