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1. 发明专利

JP2014180142A Electric power conversion system 有权
标题翻译：电力转换系统
公开(公告)号：JP2014180142A
公开(公告)日：2014-09-25
申请号：JP2013052608
申请日：2013-03-15
申请人： Hitachi Ltd , 株式会社日立製作所 , Hitachi Mito Engineering Co Ltd , 日立水戸エンジニアリング株式会社
发明人： KOJIMA TETSUO , SHINOMIYA KENJI , KAWAMOTO TAKEYASU , MURAOKA KAZUFUMI , SUGIURA TORU
IPC分类号： H02M3/28
CPC分类号： H02M1/08 , H02M3/335
摘要： PROBLEM TO BE SOLVED: To provide means for suppressing and alleviating electromagnetic noise resulting from voltage and current harmonics without magnetically saturating an isolation transformer in a DC-DC converter using the isolation transformer.SOLUTION: In the DC power supply unit, a pulse-on time of an output voltage waveform of a DC-AC power inverter circuit is controlled to a value corresponding to a DC voltage of a DC voltage source, and a switching period of the output voltage waveform of a DC-AC power inverter circuit is changed according to a predetermined time series signal.
摘要翻译：要解决的问题：提供用于抑制和减轻由电压和电流谐波产生的电磁噪声的装置，而不会在使用隔离变压器的DC-DC转换器中使隔离变压器磁饱和。解决方案：在直流电源单元中，脉冲将DC-AC电力逆变器电路的输出电压波形的时间控制为与直流电压源的直流电压对应的值，并且直流 - 交流功率逆变器电路的输出电压波形的开关周期根据到预定的时间序列信号。

2. 发明专利

JP2014121200A Power conversion apparatus 有权
标题翻译：功率转换装置
公开(公告)号：JP2014121200A
公开(公告)日：2014-06-30
申请号：JP2012275693
申请日：2012-12-18
申请人： Hitachi Ltd , 株式会社日立製作所 , Hitachi Mito Engineering Co Ltd , 日立水戸エンジニアリング株式会社
发明人： SUGIURA TORU , KOJIMA TETSUO , SHINOMIYA KENJI , KAWAMOTO TAKEYASU , MURAOKA KAZUFUMI
IPC分类号： H02M3/00
CPC分类号： H02M3/00 , H02M1/15 , H02M2001/0022
摘要： PROBLEM TO BE SOLVED: To solve such a problem that there is a case where sufficient control response to input voltage variation cannot be obtained and electric oscillation cannot be effectively suppressed in damping control for suppressing electric oscillation generated in an input side LC filter of a DC-DC conversion apparatus.SOLUTION: A control apparatus for the DC-DC conversion apparatus includes a subtractor for detecting a first filter capacitor voltage and a DC power supply voltage and subtracting the DC power supply voltage from the filter capacitor voltage and a bypass filter for cutting off a DC component in a subtraction result of the subtractor, shifting a phase of an AC component and outputting damping control quantity. By adding the damping control quantity to a voltage command of the DC-DC conversion apparatus, electric oscillation generated in the input side LC filter of the DC-DC conversion apparatus can be suppressed.
摘要翻译：要解决的问题为了解决这样一个问题，即在DC的输入侧LC滤波器中产生的抑制电振荡的阻尼控制的阻尼控制中，不能获得对输入电压变化的足够的控制响应并且不能有效地抑制电振荡 -DC转换装置。用于DC-DC转换装置的控制装置包括用于检测第一滤波电容器电压和DC电源电压并从滤波电容器电压减去DC电源电压的减法器和用于在减法器的减法结果中切断DC分量，移动AC分量的相位并输出阻尼控制量。通过将减振控制量添加到DC-DC转换装置的电压指令，可以抑制在DC-DC转换装置的输入侧LC滤波器中产生的电振荡。

3. 发明专利

JP2013201833A Dc power supply and control method therefor 有权
标题翻译：直流电源及其控制方法
公开(公告)号：JP2013201833A
公开(公告)日：2013-10-03
申请号：JP2012068726
申请日：2012-03-26
申请人： Hitachi Ltd , 株式会社日立製作所 , Hitachi Mito Engineering Co Ltd , 日立水戸エンジニアリング株式会社
发明人： SHINOMIYA KENJI , NAGAURA YASUHIRO , KOJIMA TETSUO , KAWAMOTO TAKEYASU , MURAOKA KAZUFUMI , SUGIURA TORU
IPC分类号： H02M3/28
CPC分类号： Y02B70/1491
摘要： PROBLEM TO BE SOLVED: To cope with the risk of falling into an element break if main switching elements and a resonance switch are turned off in a state of a large current flow caused by a resonance current, when turning off the main switching elements due to protection operation, while main switching elements Q1-Q4 are ON and a resonance switch Qz is ON.SOLUTION: When one of the main switching element is ON and the resonance switch is ON, instead of instantly turning off the main switch element and the resonance switch, the turn-off is performed surely after the completion of a half period of the resonance operation, so as to avoid breakage in the state of a large current flow caused by the resonance current. Further, when the main switching element is ON, a gate pulse in that period surely switches on the resonance switch, so that the main switching element and the resonance switch are simultaneously turned off.
摘要翻译：要解决的问题：为了应对在由谐振电流引起的大电流的状态下主开关元件和谐振开关断开的危险，当由于主谐振电流而导致主开关元件断开时，主开关元件Q1-Q4为ON，谐振开关Qz为ON。解决方案：当主开关元件为ON，谐振开关为ON时，不是立即关闭主开关元件和谐振在谐振操作的半周期完成之后，可靠地执行关断，以避免由于谐振电流引起的大电流的状态的破坏。此外，当主开关元件为ON时，该时段中的栅极脉冲确保接通谐振开关，使得主开关元件和谐振开关同时截止。

4. 发明专利

JP2014195373A Dc power unit 有权
标题翻译：直流电源单元
公开(公告)号：JP2014195373A
公开(公告)日：2014-10-09
申请号：JP2013070939
申请日：2013-03-29
申请人： Hitachi Ltd , 株式会社日立製作所 , Hitachi Mito Engineering Co Ltd , 日立水戸エンジニアリング株式会社
发明人： SHINOMIYA KENJI , MURAOKA KAZUFUMI , KOJIMA TETSUO , KAWAMOTO TAKEYASU , SUGIURA TORU
IPC分类号： H02M3/28
CPC分类号： H02M3/33576 , H02M2001/0058 , Y02B70/1433 , Y02B70/1491
摘要： PROBLEM TO BE SOLVED: To reduce generation of noise caused by an inrush surge current in turning-on a resonance switch and a loss in turning-on the resonance switch in a DC-DC converter.SOLUTION: An inrush surge current suppression reactor is provided in a closed circuit formed from a snubber circuit and a resonance circuit, and inductance utilized for a resonant operation is partially charged with leakage inductance of a transformer and inductance of the inrush surge current suppression reactor. A ratio of the inductance of the inrush surge suppression reactor with respect to a sum (resonance inductance) of the leakage inductance of the transformer and the inductance of the inrush surge current suppression reactor is determined to reduce a turn-on loss of a resonance switch within allowable voltage resistance values of the resonance switch, thereby suppressing an inrush surge current.
摘要翻译：要解决的问题：减少在开启谐振开关时由浪涌电流引起的噪声的产生和DC-DC转换器中的谐振开关导通的损耗。解决方案：提供浪涌电流抑制电抗器在由缓冲电路和谐振电路形成的闭合电路中，并且用于谐振操作的电感部分地被变压器的漏电感和浪涌电流抑制电抗器的电感充电。冲击浪涌抑制电抗器的电感相对于变压器的漏感和谐振电流抑制电抗器的电感之和（谐振电感）的比率被确定为减小谐振开关的接通损耗在谐振开关的容许电压电阻值内，从而抑制浪涌电流。

5. 发明专利

JP2014075928A Dc power supply device and control method thereof 有权
标题翻译：直流电源装置及其控制方法
公开(公告)号：JP2014075928A
公开(公告)日：2014-04-24
申请号：JP2012222639
申请日：2012-10-05
申请人： Hitachi Ltd , 株式会社日立製作所 , Hitachi Mito Engineering Co Ltd , 日立水戸エンジニアリング株式会社
发明人： SHINOMIYA KENJI , KOJIMA TETSUO , SUGIURA TORU , KAWAMOTO TAKEYASU , MURAOKA KAZUFUMI
IPC分类号： H02M3/28 , H02M7/537
CPC分类号： H02M3/33576 , H02M1/36 , H02M2001/0058 , Y02B70/1433 , Y02B70/1491
摘要： PROBLEM TO BE SOLVED: To prevent breaking of a current by soft switching from becoming disabled by an overcurrent flowing in a filter reactor during an initial charge of a filter capacitor, as well as prevent a transformer from being bias-magnetized by pulse decimation.SOLUTION: A DC power supply device is provided with a controller for executing a process to decimate on-pulses by disabling a gate signal for a main switching element and a resonance switching element. This on-pulse decimation process is provided with means for determining, on the basis of the circuit constant of a DC-DC converter including a resonance circuit and an input power supply voltage, the number of times the pulse is on when the voltage of a filter capacitor connected to the output side, i.e., a DC output voltage, has increased by a prescribed voltage from a DC output voltage command value, or when the DC output voltage is less than the prescribed voltage.
摘要翻译：要解决的问题：为防止在过滤电容器的初始充电期间通过在滤波电抗器中流过的过电流使软开关断开电流，以及防止变压器通过脉冲抽取被偏置磁化。直流电源装置具有控制器，用于通过禁用用于主开关元件和谐振开关元件的栅极信号来执行用于抽取导通脉冲的处理。该脉冲抽取处理提供有用于基于包括谐振电路和输入电源电压的DC-DC转换器的电路常数来确定当a的电压为1的脉冲接通的次数的装置连接到输出侧的滤波电容即直流输出电压从直流输出电压指令值增加规定电压，或者当直流输出电压小于规定电压时。

6. 发明专利

JP2001008302A ELECTRIC VEHICLE CONTROLLER 失效
公开(公告)号：JP2001008302A
公开(公告)日：2001-01-12
申请号：JP17192799
申请日：1999-06-18
申请人： HITACHI LTD
发明人： KAWAMOTO TAKEYASU
IPC分类号： B60L3/00
摘要： PROBLEM TO BE SOLVED: To prevent a controller from being stopped by an overcurrent protective operation caused by an input current which is the charging current of a filter capacitor while an inverter is in operation. SOLUTION: A means which turns off a switching device 3 connected in parallel to a resistor and charges a filter capacitor 4 through the resistor when a DC power supply is interrupted, and, after the voltage of the filter capacitor is lowered, the DC power supply is restored while an inverter 5 is in operation is provided. The inverter 5 is protected from stoppage by an overcurrent protective operation caused by an input current which is applied when the DC power supply is interrupted and, after the voltage of the filter capacitor is lowered, the DC power supply is restored while the inverter is in operation.

7. 发明专利

JPH11178102A VEHICLE CONTROLLER 失效
公开(公告)号：JPH11178102A
公开(公告)日：1999-07-02
申请号：JP34465097
申请日：1997-12-15
申请人： HITACHI LTD
发明人： SATO TADAKI , KAWAMOTO TAKEYASU
IPC分类号： B60L3/00
摘要： PROBLEM TO BE SOLVED: To use a driving variable voltage variable frequency(VVVF) inverter instead of an auxiliary power supply inverter when the latter fails, by operating the driving VVVF inverter of a two-level mode inverter as the auxiliary power supply inverter. SOLUTION: When an inverter 3 fails, operating a switch 6, the switch 6 is changed over from its terminal side N into its terminal side T to release the faulty inverter 3. At the same time, a DC power is fed from a stringing to an inverter 2 via a circuit breaker 10. On the other hand, the output side of the inverter 2 is released from a main motor 5 to connect it with a transformer 7. In this state, the inverter 2 is operated subjecting it to a constant- voltage and constant-frequency operation to make possible the feeding of an inner power supply to a train. Since a two-level mode inverter is adopted a the inverter 2, generating a small amount of the distortion of its output waveform in comparison with the inverter 3, the distortion may affect to some extent the load of the inverter 2. But, the changeover of the switch 6 does not interfere with the traveling of the train, etc., to make actable the changeover as a stopgap means for returning the train to the garage thereof.

8. 发明专利

JPH09201073A STATIONARY AUXILIARY POWER-SUPPLY FOR VEHICLE 失效
公开(公告)号：JPH09201073A
公开(公告)日：1997-07-31
申请号：JP632096
申请日：1996-01-18
申请人： HITACHI LTD , HITACHI TECHNO ENG
发明人： SATO TADAKI , TOYODA EIICHI , KAWAMOTO TAKEYASU , KUSHIDA TOSHIYUKI
IPC分类号： H02J3/01 , B60L1/00 , H02M7/48
摘要： PROBLEM TO BE SOLVED: To obtain a stationary auxiliary power-supply which maintains the function of a harmonic-component removal filter as in conventional cases, which makes effective use of energy wasted to the outside and whose efficiency is enhanced by a method wherein a harmonic transformer which is operated by a harmonic-component voltage shared by a harmonic filter is installed and the output of the transformer is utilized for many purposes. SOLUTION: A harmonic-component voltage which is shared across both ends of a filter reactor 2 is input to a harmonic transformer 6. The harmonic transformer 6 is designed in such a way that a voltage at 1.2kHz or higher is output. Consequently, the harmonic transformer 6 outputs a harmonic voltage which is decided by a voltage transformation ratio. The output of the harmonic transformer 6 is utilized as a charging device so as to charge a storage battery. Thereby, a harmonic component which is wasted to the outside as thermal energy can be utilized effectively (as the charging device), and the efficiency of an auxiliary power-supply apparatus is enhanced.

9. 发明专利

JPH07298407A ELECTRIC CAR CONTROLLER 失效
公开(公告)号：JPH07298407A
公开(公告)日：1995-11-10
申请号：JP9105394
申请日：1994-04-28
申请人： HITACHI LTD
发明人： KAWAMOTO TAKEYASU
IPC分类号： B60M3/00 , B60L3/00 , B60L9/00 , B61L3/08
摘要： PURPOSE:To make an electric car run, making the most of the capacity of substations to the full in all blocks. CONSTITUTION:When an electric car passes a ground piece 1, a piece 2 on a car detects the position of the substation which supplies the electric car with power, and then a maximum pantagraph current setter 4 automatically sets the maximum current pattern corresponding to the capacity of the substation and controls the motor current, whereby the pantagraph current is controlled below the maximum pantagraph current pattern.

10. 发明专利

JP2001037004A INVERTER TYPE ELECTRIC ROLLING STOCK CONTROLLER 失效
公开(公告)号：JP2001037004A
公开(公告)日：2001-02-09
申请号：JP21066099
申请日：1999-07-26
申请人： HITACHI LTD
发明人： NARITA HIROSHI , KAWAMOTO TAKEYASU
IPC分类号： B60L7/14 , B60L9/18
摘要： PROBLEM TO BE SOLVED: To control an inverter type electric rolling stock suitable for the protection of overhead lines from overcurrents, when short circuits occur among the phases of an inverter by improving the performance of the regenerative brake of the stock at high-speed time, even when the voltages of the overhead lines are low. SOLUTION: An electric rolling stock is provided with a pantograph 1, which receives power supply from an overhead line, a line breaker 2, and a high-speed circuit breaker 3. The stock is also provided with a semiconductor switch 5, which is connected in parallel with a resistor 4, a filter device composed of a reactor 6 and a capacitor 7, and an inverter device 8. In addition, the stock is also provided with a motor 9 and a means (an allowable maximum voltage setter 11 for inverter, a low-level priority circuit 12, a high-level priority circuit 13, comparators 14 and 15, a semiconductor switch controller 51, and a motor voltage detector 92), which controls the turning-on/off of the semiconductor switch 5 so that the terminal voltage of the resistor 4 becomes a different voltage between the voltages of the motor 9 and overhead line when the regenerative brake of the stock is applied.

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