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1. 发明专利

JP2006025550A Frequency detection device and distributed power supply device 审中-公开
标题翻译：频率检测装置和分布式电源装置
公开(公告)号：JP2006025550A
公开(公告)日：2006-01-26
申请号：JP2004202182
申请日：2004-07-08
申请人： Ebara Densan Ltd , 株式会社荏原電産
发明人： NINOMIYA HIRONORI , ENDO MANABU , KOMATSU TAKAARI
IPC分类号： H02J3/38
摘要： PROBLEM TO BE SOLVED: To provide a frequency detection device that can exactly and easily detect the correct frequency of a system voltage, even if the system voltage to be detected is distorted in the vicinity of a zero point, and a distributed power supply device equipped with the detection device. SOLUTION: In the frequency detection device that detects the system voltage of an AC power system 18 by a voltage detector 23, and detects a frequency from a zero point of a voltage detected by the voltage detector, frequency detection is performed by using a zero-point phase detection signal (a) that detects the frequency from the zero point of the voltage detected by the voltage detector, and an arbitrary-point phase detection signal (b) that detects the frequency from a point A of a phase α displaced from the zero pint of the voltage detected by the voltage detector. Here, the frequency detection device comprises a rectifier 37 that rectifies an AC voltage detected by the voltage detector and a potential divider 38 that divides a rectified DC voltage, to detect the frequency from the point, A displaced in phase from the zero point from its voltage dividing ratio. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：为了提供一种频率检测装置，即使在零点附近检测到的系统电压失真，也可以容易地检测系统电压的正确频率，并且分布式电力供电装置配有检测装置。解决方案：在通过电压检测器23检测交流电力系统18的系统电压并从电压检测器检测到的电压的零点检测频率的频率检测装置中，通过使用检测来自电压检测器检测到的电压的零点的频率的零点相位检测信号（a）和从相位α的点A检测频率的任意点相位检测信号（b）从电压检测器检测到的电压的零点偏移。这里，频率检测装置包括：整流器37，其对由电压检测器检测的AC电压进行整流;以及分压器38，其对整流后的直流电压进行分压，从而从相位偏离的点分压比。版权所有（C）2006，JPO＆NCIPI

2. 发明专利

JP2008005611A Inverter device 有权
标题翻译：逆变器装置
公开(公告)号：JP2008005611A
公开(公告)日：2008-01-10
申请号：JP2006171865
申请日：2006-06-21
申请人： Ebara Densan Ltd , 株式会社荏原電産
发明人： NINOMIYA HIRONORI , KOMATSU TAKAARI , ISHIHARA SEIICHI , ENDO MANABU
IPC分类号： H02M7/00
摘要： PROBLEM TO BE SOLVED: To provide an inverter device having a three-phase line voltage control type inverter capable of eliminating an output circuit and a filter circuit for one phase, attaining cost reduction by simplifying a circuit structure, and stably supplying three-phase balanced voltage to a three-phase three line system load. SOLUTION: In this inverter device 10 having the three-phase line voltage control type inverter 15 of which a certain phase is grounded, there are provided a device 31 for setting three-phase target phase voltage Vo * on a load side, output voltage adjusting devices 32-35 which output inverter output phase voltage Vinv-u, Vinv-w as a pulse width modulating signal so as to become three-phase target phase voltage Vo * on the load side, a device 50 for converting the inverter output phase voltage to the line voltage in the line to the grounded phase, and a circuit 21 for driving the three-phase line voltage control type inverter. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：解决的问题：提供一种具有能够消除一相的输出电路和滤波电路的三相线路电压控制型逆变器的逆变器装置，通过简化电路结构来实现成本降低，并且稳定地提供三个相平衡电压到三相三线系统负载。解决方案：在具有一定相接地的三相线路电压控制型逆变器15的逆变器装置10中，设置有用于将三相目标相电压Vo * < SP>负载侧的输出电压调整装置32-35，其将逆变器输出相电压Vinv-u，Vinv-w作为脉宽调制信号输出，成为三相目标相电压Vo SP>负载侧的设备50，用于将逆变器输出相电压转换为线路中的线电压到接地相的装置50以及用于驱动三相线路电压控制型逆变器的电路21。版权所有（C）2008，JPO＆INPIT

3. 发明专利

JP2008015899A System interconnection power conditioner 审中-公开
标题翻译：系统互连功率调节器
公开(公告)号：JP2008015899A
公开(公告)日：2008-01-24
申请号：JP2006188125
申请日：2006-07-07
申请人： Ebara Densan Ltd , 株式会社荏原電産
发明人： NINOMIYA HIRONORI , KOMATSU TAKAARI , TAI MASA
IPC分类号： G05F1/67 , H02M3/155 , H02M7/00
摘要： PROBLEM TO BE SOLVED: To provide a system interconnection power conditioner capable of stably and efficiently outputting ac power to a system even though an operating point of a solar panel fluctuates by maximum output power tracking control of the solar panel and even though a load condition fluctuates. SOLUTION: The system interconnection power conditioner is provided with a boosting chopper 12 for adjusting output voltage of the solar pane 11 to voltage to be maximum output power of the solar panel, and an inverter 15 for outputting ac power interconnected to the system with the voltage boosted by the boosting chopper as ac link voltage, wherein the inverter controls the ac link voltage at a constant level. The inverter 15 performs feedback control of inverter output current so as to make the ac link voltage constant and performs feedback control of reactive power components of inverter output current so as to be zero. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：即使太阳能电池板的工作点通过太阳能电池板的最大输出功率跟踪控制而波动，也能够提供能够稳定且有效地向系统输出交流电力的系统互联功率调节器，负载条件波动。解决方案：系统互连功率调节器设置有用于将太阳能电池板11的输出电压调节为太阳能电池板的最大输出功率的升压斩波器12，以及用于输出与系统互连的交流电力的逆变器15 由升压斩波器提升的电压作为交流电压，其中变频器将交流链路电压控制在恒定水平。逆变器15进行逆变器输出电流的反馈控制，使交流电压恒定，对变频器输出电流的无功功率分量进行反馈控制，使其为零。版权所有（C）2008，JPO＆INPIT

4. 发明专利

JP2006025500A Dispersed power unit and method of detecting its dc grounding 有权
标题翻译：分散电源单元及其直流接地检测方法
公开(公告)号：JP2006025500A
公开(公告)日：2006-01-26
申请号：JP2004199840
申请日：2004-07-06
申请人： Ebara Densan Ltd , 株式会社荏原電産
发明人： NINOMIYA HIRONORI , ENDO MANABU , KOMATSU TAKAARI
IPC分类号： H02H3/16 , H02J1/00 , H02J3/38 , H02M7/48
摘要： PROBLEM TO BE SOLVED: To provide a dispersed power unit which can detect the grounding of DC power safely and surely by the addition of a simple circuit constitution and the addition of software, and a method of detecting the DC grounding in the unit. SOLUTION: In the dispersed power unit which receives the input of a DC voltage of the DC power source 11 and creates a three-phase AC voltage by an inverter 15 and interconnects the unit with a three-phase AC power source 18, a neutral point on the system side of a three-phase voltage detecting transformer 23 which detects the voltage of the AC power source and the neutral point among a plurality of capacitors connected in series between the positive polarity and the negative polarity of a link voltage are connected by wiring with each other by means of a switch 25. A zero-phase current transformer 20 detects the grounding current of the DC power source 11 at connection by the wiring. When the magnitude of the detected grounding current exceeds a second level during the operation of the inverter, this unit stops the operation of the inverter, and determines the existence of the grounding of the DC power source by determining whether the grounding current at that time is over a first determination level or not. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：解决的问题：提供一种能够通过添加简单的电路结构和添加软件来安全可靠地检测直流电力接地的分散电力单元，以及检测单元中的直流接地的方法。解决方案：在接收直流电源11的直流电压的输入并由逆变器15产生三相交流电压并将该单元与三相交流电源18相互连接的分散电力单元中，在链路电压的正极性和负极性串联连接的多个电容器中检测AC电源的电压和中性点的电压的三相电压检测变压器23的系统侧的中性点，通过开关25相互连接来连接。零相电流互感器20在通过布线连接时检测直流电源11的接地电流。当变频器运行中检测到的接地电流的大小超过第二电平时，本机停止变频器的运行，并确定直流电源的接地是否存在，确定当时的接地电流是否为超过第一决定级别。版权所有（C）2006，JPO＆NCIPI

5. 发明专利

JP2001304180A CANNED MOTOR PUMP 失效
公开(公告)号：JP2001304180A
公开(公告)日：2001-10-31
申请号：JP2000125210
申请日：2000-04-26
申请人： EBARA CORP , EBARA DENSAN LTD
发明人： TOYAMA YUKIO , ISHIZUKA SHINOBU , HIRATA TOMOTOSHI , SEKINO TAKAHISA , NINOMIYA HIRONORI , KURONUMA TAKAYUKI , OGAWA TAKAHIKO
IPC分类号： G01B7/30 , F04D13/06 , F04D29/04 , F16C19/52 , F16C41/00 , G01B7/00 , H02K5/128 , H02K7/14 , H02K11/00
摘要： PROBLEM TO BE SOLVED: To provide a canned motor pump which has a electrical detection means for detecting an abrasion state of a radial and axial directions bearing without being affected by a change of load current of a motor, an operating point of a pump, or groove harmonics component due to waviness or sensor installation error. SOLUTION: A part of an end face of a core in a canned motor stator 13 is provided with a cutout, a plurality of induction-type sensors S1 to S4 each provided with a shielded part are arranged to the cutout such that a detected surface is partially overlapped with an outer peripheral surface of an end of a core of the rotor 10 along an axial direction. A bearing abrasion detecting means is provided for connecting a low-pass filter circuit and a high-pass filter circuit to an output side of each of the sensors S1 to S4, and detecting a position of the rotor 5 to monitor the abrasion state of the bearings 9a, 9b.

6. 发明专利

JPH11351186A CANNED MOTOR PUMP 失效
公开(公告)号：JPH11351186A
公开(公告)日：1999-12-21
申请号：JP16090398
申请日：1998-06-09
申请人： EBARA CORP , EBARA DENSAN LTD
发明人： ISHIZUKA SHINOBU , TOYAMA YUKIO , HIRATA TOMOTOSHI , KURONUMA TAKAYUKI , YAMAZAKI SATOYUKI , NINOMIYA HIRONORI
IPC分类号： G01B7/02 , F04D13/06 , F04D29/04 , F04D29/05 , G01B7/00 , H02K5/128
摘要： PROBLEM TO BE SOLVED: To provide a canned motor pump which has bearings arranged on both sides of a rotor, the impeller side and the counter-impeller side, so that the wear processes of the bearings can be easily and surely monitored by using a visible or electric detection method. SOLUTION: A canned motor pump includes a sensor target 20 fixed to the end on the counter-impeller side of a rotor 5, an electromagnetic radial sensor S5 arranged in the radial direction of the sensor target 20 to be opposed to an electromagnetic axial sensor S6 in an axial direction, the radial sensor S5 and the axial sensor S6 being arranged in a sensor case 16 fixed to the side plate 25b of a motor frame 24 with a sensor spacer 17 and a thick reinforcing plate 18 held therebetween, and a sensor can 19 arranged for covering the inner periphery faces of the sensor case 16 and the sensor spacer 17 and the end face of the reinforcing plate 18 opposed to the sensor target 20, the inner diameter portions of the sensor case 16 and the sensor spacer 17 contacting the sensor can 19 being gradually thicker to the radial direction except at the end of the radial sensor S5.

7. 发明专利

JPH11351185A CANNED MOTOR PUMP 失效
公开(公告)号：JPH11351185A
公开(公告)日：1999-12-21
申请号：JP16090298
申请日：1998-06-09
申请人： EBARA CORP , EBARA DENSAN LTD
发明人： TOYAMA YUKIO , ISHIZUKA SHINOBU , HIRATA TOMOTOSHI , YAMAZAKI SATOYUKI , NINOMIYA HIRONORI , KURONUMA TAKAYUKI
IPC分类号： G01B7/02 , F04D13/06 , F04D29/04 , F04D29/05 , H02K5/128
摘要： PROBLEM TO BE SOLVED: To provide a canned motor pump which has bearings arranged on both sides of a rotor, the impeller side and the counter-impeller side, so that the wear processes of the bearings can be easily and surely monitored by using a visible or electric detection method. SOLUTION: A canned motor pump has bearings 9a, 9b arranged on both sides of a rotor 5, the impeller side and the counter-impeller side, and an end cover 11 arranged at the end on the counter-impeller side of a motor M, the end cover 11 being provided with one or more detection hole 16 open to a radial direction, to which a transparent thick disc 17 is fitted, and with a cover 18 open at its center to fix the disc 17 in such a manner that the end of a target 19 fixed to the end on the counter-impeller side of the rotor 5 can be located almost at the center of the detection hole 16 in the axial direction.

8. 发明专利

JP2001065487A CANNED MOTOR PUMP 失效
公开(公告)号：JP2001065487A
公开(公告)日：2001-03-16
申请号：JP24186899
申请日：1999-08-27
申请人： EBARA CORP , EBARA DENSAN LTD
发明人： TOYAMA YUKIO , ISHIZUKA SHINOBU , HIRATA TOMOTOSHI , NINOMIYA HIRONORI , KURONUMA TAKAYUKI , OGAWA TAKAHIKO
IPC分类号： F04D15/00 , F04D13/06
摘要： PROBLEM TO BE SOLVED: To easily detect the state of advancement of wear of bearings in radial and axial directions using an electric detection method. SOLUTION: In this pump, notches are provided at some parts of the end face of a fixed core of a canned motor, a plurality of induction type sensors S1, S2, S3, and S4 having a shielding structure are disposed at the notch parts with the detection surface of the sensors overlapped with the outer peripheral surface of the end part of a rotor core at least partly along the axial direction. Then, the position of the rotor is detected byan oiutput from the induction sensors passing through low-pass filter circuits 45 to 48 for attenuating a frequency component of several tens Hz or higher and high-pass filter circuits 49 to 52 for attenuating a frequency component of several Hz or lower so as to monitor the state of wear of bearings.

9. 发明专利

JP2000064979A CANNED MOTOR PUMP 失效
公开(公告)号：JP2000064979A
公开(公告)日：2000-03-03
申请号：JP33860798
申请日：1998-11-30
申请人： EBARA CORP , EBARA DENSAN LTD
发明人： TOYAMA YUKIO , ISHIZUKA SHINOBU , HIRATA TOMOTOSHI , YAMAZAKI SATOYUKI , NINOMIYA HIRONORI , KURONUMA TAKAYUKI , HIGAKI NOBUHIRO , OGAWA TAKAHIKO
IPC分类号： F04D29/04 , F04D13/06 , H02K11/00
摘要： PROBLEM TO BE SOLVED: To provide a canned motor pump capable of easily and certainly monitoring an abrasion progressive state of a bearing using an electrical detection method in the canned motor pump in which the bearings are disposed at both of impeller side and opposed impeller side of a rotor. SOLUTION: In a canned motor pump in which a rotor 5 is supported by bearings 9a, 9b disposed at both of impeller side and opposed impeller side, a circular sensor target 20 is fixed to an opposite impeller side end of the rotor 5. A radial sensor S5 is disposed in a radial direction of the sensor target 20 and an axial sensor S6 is disposed in an axial direction of the sensor target 20 such that they are opposed each other. The radial sensor S5 and the axial sensor S6 are disposed in a sensor case 16 through a sensor spacer 17 and a reinforcing plate 18 having a big thickness. A sensor can 19 covering an inner periphery of the sensor case 16 and the sensor spacer 17 and an edge surface of the reinforcing plate 18 opposed to the sensor target 20 is disposed. An inner diameter portion of the sensor case 16 and the sensor spacer 17 contacted with the sensor can 19 is formed to a radially thick portion except for a tip end of the radial sensor S5.

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