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1. 发明专利

JP2000004126A POWER AMPLIFIER 失效
公开(公告)号：JP2000004126A
公开(公告)日：2000-01-07
申请号：JP17018998
申请日：1998-06-17
申请人： NISSIN ELECTRIC CO LTD
发明人： KAWAKATSU TAKESHI
IPC分类号： H03F3/217
摘要： PROBLEM TO BE SOLVED: To actualize higher-precision amplification easily by suppressing the distortion of the output voltage waveform of a PWM inverter and obtaining stable operation of the PWM inverter. SOLUTION: The power amplifier is equipped with the voltage type PWM inverter 1 and further equipped with an amplitude control circuit 6 and a phase control circuit 7 which extract the amplitude error and phase error between input and output signals and generate amplitude and phase correction signals Vc and Vd corresponding to the amplitude and phase errors and an inverter driving circuit 8 which perform turn-on control over the switching element of the PWM inverter 1 according to the amplitude and phase correction signals Vc and Vd; and a feedback circuit 9 which feeds an inverter output voltage instantaneous value back negatively is added between the input and output of the PWM inverter 1 and its feedback signal Vf and amplitude and phase correction signals Vc and Vd are supplied to the inverter driving circuit 8 after error amplification.

2. 发明专利

JPH10112615A POWER AMPLIFIER 失效
公开(公告)号：JPH10112615A
公开(公告)日：1998-04-28
申请号：JP26461096
申请日：1996-10-04
申请人： NISSIN ELECTRIC CO LTD
发明人： KAWAKATSU TAKESHI
IPC分类号： H02M7/48 , H03F3/217
摘要： PROBLEM TO BE SOLVED: To compensate an amplitude error and a phase error with high precision by using an amplitude error amplifier circuit and a phase error extract circuit so as to extract the amplitude error and the phase error between input/output signals respectively thereby generating corresponding amplitude control and phase control signals and controlling a switch element with a duty corresponding to the sum. SOLUTION: An amplitude of an output voltage from a transformer 27 is extracted as a feedback signal VO via a transformer 28. An input signal VI and a feedback signal VO are given to BPFs 31, 32, from which a 50 or 60Hz component is extracted and given to DC converters 33, 34. Then the DC component is subtracted from the feedback signal at a subtractor 35 and its error component is amplified by an error amplifier 36, the error amplified output is added to a reference DC voltage at an adder 37 and it is multiplied with the input signal VI at a multiplier 39 and then an amplitude correction signal is outputted to an adder 40. As to a phase error, a signal resulting from shifting the input signal VI by 90 deg. at a phase shifter 41 and the feedback signal VO with a phase difference θ with respect to the input signal VI are multiplied by a multiplier 44. In this case, a correction value is obtained by selecting a multiplication coefficient of the multiplier 39 to be the unity. According to the results above, a duty corresponding to the adder is used to correct the input signal VI with high accuracy.

3. 发明专利

JP2003009542A Battery power storage system and initial charging method therefor 审中-公开
标题翻译：电池储能系统及其初始充电方法
公开(公告)号：JP2003009542A
公开(公告)日：2003-01-10
申请号：JP2001193278
申请日：2001-06-26
申请人： Kansai Electric Power Co Inc:The , Nissin Electric Co Ltd , 日新電機株式会社 , 関西電力株式会社
发明人： TOKUDA NOBUYUKI , KIKUOKA YASUHEI , KAWAKATSU TAKESHI , KAWAKAMI NORIKAZU
IPC分类号： H01M10/44 , H02M7/48
CPC分类号： Y02E60/12
摘要： PROBLEM TO BE SOLVED: To provide a battery power storage system wherein power conversion efficiency is enhanced and the cost is reduced without separately installing a dedicated initial charger.
SOLUTION: In the battery power storage system, a power converter 4 can be connected to a system power supply 1 through a transformer 3 for linkage, and an electrolyte circulating secondary battery 6 which requires initial charging from 0 V of battery voltage can be connected to the direct current side of the power converter 4 through an electrolytic capacitor 15. The direct-current voltage of the electrolytic capacitor 15 is established at rectified voltage by the rectifying operation of the power converter 4, and further the electrolyte circulating secondary battery 6 is connected to the direct current side of the power converter 4. The battery power storage system is provided with a control circuit 16 which initially charges the electrolyte circulating secondary battery 6 under such control that the modulation factor of the power converter 4 is fixed at a value not more than 1, and the phase difference between the output voltage of the power converter 4 and the system voltage is fixed at a value not more than the rated power of the power converter 4.
COPYRIGHT: (C)2003,JPO
摘要翻译：要解决的问题：提供一种其中电力转换效率提高并且成本降低而不单独安装专用初始充电器的蓄电池蓄电系统。解决方案：在蓄电池蓄电系统中，电力转换器4可以通过变压器3连接到系统电源1进行连接，并且可以将需要从0V电池电压初始充电的电解液循环二次电池6连接到电力转换器4的直流侧通过电解电容器15通过电力转换器4的整流运行而建立在整流电压下的电解电容器15的直流电压，并且进一步连接电解液循环二次电池6 到电力转换器4的直流侧。电池蓄电系统设置有控制电路16，该控制电路16在电力转换器4的调制系数固定为不是值的情况下，首先对电解液循环二次电池6进行充电大于1，并且功率转换器4的输出电压与系统电压之间的相位差是固定的 d不大于功率转换器4的额定功率。

4. 发明专利

JP2001298871A BATTERY POWER STORAGE SYSTEM 失效
公开(公告)号：JP2001298871A
公开(公告)日：2001-10-26
申请号：JP2000111116
申请日：2000-04-12
申请人： KANSAI ELECTRIC POWER CO , NISSIN ELECTRIC CO LTD
发明人： TOKUDA NOBUYUKI , KIKUOKA YASUHEI , TADA TOMOSHI , KAWAKATSU TAKESHI
IPC分类号： H02J7/34 , H01M10/44 , H02J3/32
摘要： PROBLEM TO BE SOLVED: To achieve the rise of accuracy and the reduction of cost by the improvement of frequency property of a battery power storage system which charges and discharges a secondary battery with a hybrid system of power converter. SOLUTION: This is a battery power storage system which charges and discharges an electrolyte circulation type of secondary battery 1 with a hybrid system of power converter 2, where a small-capacity high frequency PWM inverter 5 and a large-capacity rectangular wave inverter 7 are connected multiply to a power system. The total DC voltage Vb of a minority of optional single cells 1a' out of a plurality of single cells 1a constituting a secondary battery 1 such as a redox flow battery or the like is applied to the DC side of the small-capacity high frequency PWM inverter 5, and the DC voltage Va of all single cells 1a,... is applied as rated secondary battery voltage to the DC side of a large-capacity rectangular wave inverter 7. The rated voltages of the switching elements of several inverters 5 and 7 are varied, corresponding to Va>Vb.

5. 发明专利

JP2001161073A VOLTAGE CONVERTER FOR MULTIPLEXING 失效
公开(公告)号：JP2001161073A
公开(公告)日：2001-06-12
申请号：JP34071699
申请日：1999-11-30
申请人： NISSIN ELECTRIC CO LTD
发明人： KAWASAKI YOSHINORI , KAWAKATSU TAKESHI
IPC分类号： H02M7/497 , H02M7/48
摘要： PROBLEM TO BE SOLVED: To avoid the problem of causing a cost increase because filters must be sometimes added to keep 11th and 13th higher harmonic currents flowing into a system within the upper limit of a system linkage guide line when a 12-pulse converter 2 is multiplexed in series or parallel for large capacity. SOLUTION: By using two sets of 12-pulse voltage converters 2, the respective 12-pulse converters are phase-shifted by ±7.5 deg. (angle between both of them is 15 deg.) respectively to interconnected system voltage so that 4-serial multiplex or 2-serial 2-parallel multiplex may be formed into one unit of multiplex. The units are multiple-connected in series or parallel, thereby forming the voltage converter having large capacity.

6. 发明专利

JP2001157383A POWER STORAGE DEVICE 失效
公开(公告)号：JP2001157383A
公开(公告)日：2001-06-08
申请号：JP33431199
申请日：1999-11-25
申请人： NISSIN ELECTRIC CO LTD
发明人： KUMEGAWA HIROSHI , KAWAKATSU TAKESHI
IPC分类号： H02J7/00 , H02J3/38 , H02J15/00 , H02M7/08
摘要： PROBLEM TO BE SOLVED: To provide a power storage device capable of normally performing power compensating operations uninterruptedly and performing the periodical full-charging operations of secondary batteries. SOLUTION: A set each of power converters 5a to 5x having the capacity of 1/'n' (the plural number)-th of the fluctuation compensating capacity of power supplies 1, 2 or a load 3 and each of secondary batteries Ba to Bx constitute one unit. This power storage device comprises (n+1) units connected parallel via a linkage transformer 4 between the power supplies 1, 2 and the load 3. By letting arbitrary 'n' units of the (n+1) units perform the power compensating operations continuously and by full-charging the secondary batteries of the remaining one unit in the power compensating operations, 100% power compensating operations are normally performed. The reduction of the capacity of the (n+1) pieces each of the power converters 5a to 5x and the second batteries Ba to Bx has achieved the miniaturization, light weight and low cost of the overall device.

7. 发明专利

JP2000014006A HARMONIC WAVE FILTER 失效
公开(公告)号：JP2000014006A
公开(公告)日：2000-01-14
申请号：JP17018898
申请日：1998-06-17
申请人： NISSIN ELECTRIC CO LTD
发明人： KAWAKATSU TAKESHI
IPC分类号： H02J3/01 , H02M1/12
摘要： PROBLEM TO BE SOLVED: To improve further the absorption rate of a harmonic current flowing in the neutral line of a power supply transformer. SOLUTION: A harmonic wave filter 11 absorbs a same phase harmonic current which flows in the neutral line 4 of a 3-phase 4-wire system power supply transformer 1. A 3-phase 4-wire system filter transformer 6 which has a Δ-connection on its secondary side and has a Y-connection with a neutral is provided in the filter 11. The primary side Y-connection of the filter transformer 6 is connected to distribution lines 2a-2c of the respective phases. A filter device 10 which is composed of a capacitor 8 and a reactor 9 and practices series resonance with a required harmonic frequency is provided between the primary neutral 1 of the filter transformer 6 and the neutral line 4. A reactor 12 is inserted into the neutral line 4 of the power supply transformer 1.

8. 发明专利

JPH1054850A OPTICAL-VOLTAGE/PHOTOCURRENT SENSOR 失效
公开(公告)号：JPH1054850A
公开(公告)日：1998-02-24
申请号：JP21277896
申请日：1996-08-12
申请人： NISSIN ELECTRIC CO LTD
发明人： KUMEGAWA HIROSHI , KAWAKATSU TAKESHI
IPC分类号： G01R15/24 , G01R19/00
摘要： PROBLEM TO BE SOLVED: To prevent the change in resonat frequency and the deterioration of temperature characteristics by the stress caused by the difference between the expansion coefficient of a bonding agent for fixing a Pockels element and the expansion coefficient of the Pockels element and to achieve the compact configuration in an optical-voltage sensor using the Pockels element, whose quantity of transmitting light changes in correspondence with the applied voltage from a Cerminal. SOLUTION: In a concave groove 38 formed in a bottom plate 37 of a casing 36, a polarizer 32, a λ/4 plate 33 and an analyzer 35 are coupled together with a Pockels element 34 and tightened and fixed by compressing screws 45 and 46 in the optical-axis direction. Therefore, the Pockels element 34 is not bonded, the change of resonant frequency by heat is suppressed and the temperature characteristics can be improved. At the same time, the resonat frequency can be expanded to the frequency band, which can correspond to the surge current of thunderbolt. Furthermore, the compact configuration can be achieved since the Pockels element 34 is held from the direction of the optical axis.

9. 发明专利

JPH07167907A SPOTTING METHOD FOR ACCIDENT SUCH AS LIGHTNING STRIKE ON RAILWAY, ETC. 失效
公开(公告)号：JPH07167907A
公开(公告)日：1995-07-04
申请号：JP31680093
申请日：1993-12-16
申请人： KANSAI ELECTRIC POWER CO , NISSIN ELECTRIC CO LTD
发明人： KOIZUMI HIROSHI , KUROIWA YOSHIO , HIGUCHI KAZUHIRO , KUMEGAWA HIROSHI , YOSHIDA OSAMU , KAWAKATSU TAKESHI
IPC分类号： G01R31/08
摘要： PURPOSE:To provide a spotting method for accident such as lightning strike on railway, etc., capable of detecting an arrival time difference between a line waveform and a ground waveform by only a waveform outputted from an adder. CONSTITUTION:Surges of respective railways 1 to 3 are detected by surge sensors 5, a gain of induced phase to lightning stoke phase among output signals from these surge sensors 5 is varied by a gain converter 10, and an output signal from the surge sensors 5 of which gain is varied is added to an output signal from the other surge sensor 5 by an adder 6 to obtain a time different between the rise of line waveform and rise of ground waveform in the waveform outputted from the adder 6.

10. 发明专利

JPH0720161A OPTICAL VOLTAGE SENSOR AND ITS CHARACTERISTIC IMPROVEMENT METHOD 失效
公开(公告)号：JPH0720161A
公开(公告)日：1995-01-24
申请号：JP16688593
申请日：1993-07-06
申请人： NISSIN ELECTRIC CO LTD
发明人： KUMEGAWA HIROSHI , KAWAKATSU TAKESHI
IPC分类号： G01R15/24
摘要： PURPOSE:To expand the frequency bandwidth of an optical voltage sensor for, e.g. a lightening surge without a need for working an electro-optical effect element by a method wherein a sensor body having the electro-optical effect element and a pressurization means are provided. CONSTITUTION:A sensor body 1 is provided with an electro-optical effect element 3 on which incident light is incident and which causes a quantity-of-light change proportional to an applied voltage. A pressurization means 2 applies a pressure in a direction crossing the light transmission direction of the element 3. When a photoveil 6 is pressed via a strain gage 7, the output signal of the gage 7 is input to a strain-to-electric signal converter 8 while a pressure P is being applied uniformly to the element 3. A strain degree is converted into an electric signal 9 by the converter 8, and the pressure is converted. The incident light is incident on the body 1, and the pressure is applied to a direction crossing the incident direction of the element 3. Then, since the resonant-frequency characteristic of the element 3 becomes high due to an increase in the pressure, the frequency bandwidth of an optical voltage sensor for, e.g. a lightening surge can be expanded without a need for working the element 3.

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