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1. 发明授权

US07218494B2 Overload current protection device using magnetic impedance element 失效
标题翻译：使用磁阻元件的过载电流保护装置
公开(公告)号：US07218494B2
公开(公告)日：2007-05-15
申请号：US10468035
申请日：2002-02-14
申请人： Takahiro Kudo , Yujiro Kitaide , Kimitada Ishikawa
发明人： Takahiro Kudo , Yujiro Kitaide , Kimitada Ishikawa
IPC分类号： H02H3/08
CPC分类号： H02H1/0007 , G01R33/02 , H02H1/043 , H02H1/06 , H02H7/085
摘要： An overload current protection device for cutting off power applied from a power supply to a load (3) such as a motor by means of a contactor (switch) (2) at overloading. With the configuration, an element (40) having a magnetic impedance effect as current detection units (4a, 4b, 4c) is used to thereby expand a current detection range by eliminating magnetic saturation due to a core, a problem with a conventional current transformer, thereby providing at low costs an overload current protection device having a wide current detection range.
摘要翻译：一种过载电流保护装置，用于通过接触器（开关）（2）在电力过载时切断从电源施加到诸如电动机的负载（3）的电力。利用该结构，使用具有作为电流检测单元（4a，4b，4c）的磁阻抗效应的元件（40），从而通过消除由于磁芯的磁饱和而扩大电流检测范围，传统的电流互感器，从而以低成本提供具有宽电流检测范围的过载电流保护装置。

2. 发明授权

US07085116B2 Overload current protection device using magnetic impedance element 失效
标题翻译：使用磁阻元件的过载电流保护装置
公开(公告)号：US07085116B2
公开(公告)日：2006-08-01
申请号：US10468045
申请日：2002-02-14
申请人： Takahiro Kudo , Yujiro Kitaide , Kimitada Ishikawa
发明人： Takahiro Kudo , Yujiro Kitaide , Kimitada Ishikawa
IPC分类号： H02H3/08 , H02H9/02
CPC分类号： G01R33/02 , H02H7/085
摘要： In an overload current protection device for cutting off power from a power supply to a load (3) such as a motor by means of a contactor (switch) (2) at overloading, an MI element having a magnetic impedance (MI) effect as current detectors (4a, 4b, and 4c) is installed at a position capable of detecting a current flowing through the secondary winding of power supply transformers (5a, 5b, and 5c) that generate a control power supply to thereby reduce costs without using a constant voltage power supply and expand a current detection range by eliminating magnetic saturation due to a core, a problem with a conventional current transformer, thereby providing at low costs a high-precision overload current protection device having a wide current detection range.
摘要翻译：在过负载电流保护装置中，通过接触器（开关）（2）在过载时将电力从电源切断到诸如电动机的电动机（3），具有磁阻抗（MI）效应的MI元件作为电流检测器（4a，4b和4c）安装在能够检测流过电源变压器（5a，5b和5c）的次级绕组的电流的位置，其产生控制电源从而在不使用恒压电源的情况下降低成本，并且通过消除由于核心引起的磁饱和而扩大电流检测范围，这是传统电流互感器的问题，从而以低成本提供具有宽电流的高精度过载电流保护装置检测范围。

3. 发明授权

US06984989B2 Current sensor and overload current protective device therewith 失效
标题翻译：电流传感器和过载电流保护装置
公开(公告)号：US06984989B2
公开(公告)日：2006-01-10
申请号：US10468317
申请日：2002-02-14
申请人： Takahiro Kudo , Yujiro Kitaide , Kimitada Ishikawa
发明人： Takahiro Kudo , Yujiro Kitaide , Kimitada Ishikawa
IPC分类号： G01R31/28
CPC分类号： G01R15/148 , G01R15/18
摘要： A small, low-cost, wide-range current sensor excellent in environmental resistance and noise resistance and high in accuracy, and an application device, a DC magnetic field is applied to two magnetic elements (1a, 1b) having a magnetic impedance effect by means of a magnet (3), while a negative feedback magnetic field is applied to both elements by means of a coil (2). The variation of the magnetic field depending on the external magnetic field applied to the magnetic elements (1a, 1b) is detected by detection units (7a, 7b). The difference between the output is amplified by a differential amplifier unit (8). Thus, detection is achieved in a wide range while eliminating the influence of the noise.
摘要翻译：一种小型，低成本的宽环境电流传感器，具有优异的耐环境性和抗噪声性和高精度，并且应用装置，DC磁场被施加到具有磁阻抗的两个磁性元件（1a，1b）通过磁体（3）的作用，同时通过线圈（2）将负反馈磁场施加到两个元件。通过检测单元（7a，7b）检测施加到磁性元件（1a，1b）的外部磁场的磁场变化。输出之间的差异由差分放大器单元（8）放大。因此，在消除噪声的影响的同时，在宽范围内实现检测。

4. 发明授权

US07317604B2 Over-current protection device 失效
标题翻译：过电流保护装置
公开(公告)号：US07317604B2
公开(公告)日：2008-01-08
申请号：US11282716
申请日：2005-11-21
申请人： Takahiro Kudo , Junzo Tanaka , Kimitada Ishikawa
发明人： Takahiro Kudo , Junzo Tanaka , Kimitada Ishikawa
IPC分类号： H02H3/08 , H02H9/02 , H02H9/00 , H02H9/08
CPC分类号： H02H3/08 , G01R15/205 , H02H1/0007 , H02H1/06
摘要： An over-current protection device is constituted of a current detection unit for detecting a current from a power-supply source to a load having a magnetism detection element with a magnetic impedance (MI) effect, an AC-current supply device for supplying an AC current to the detection element, a bias-current supply device for supplying a bias current to a bias coil, a peak detection device for detecting a peak of impedance of the magnetism detection element as a variation of voltage, and a switch corresponding to a phase for selecting an output of the peak detection device. In the current detection unit, a holding device for holding a switch output and an amplifier are disposed in common for detecting the current in each phase, thereby expanding a current detectable range and reducing power consumption and cost.
摘要翻译：过电流保护装置由电流检测单元构成，电流检测单元用于检测从电源到具有磁阻抗（MI）效应的磁检测元件的负载的电流; AC电流供给装置，检测元件的电流，用于向偏置线圈供给偏置电流的偏置电流供给装置，用于检测磁检测元件的阻抗峰值作为电压变化的峰值检测装置，以及对应于相位的开关用于选择峰值检测装置的输出。在电流检测单元中，用于保持开关输出的保持装置和放大器被共同设置，用于检测每相中的电流，从而扩大电流可检测范围并降低功耗和成本。

5. 发明授权

US07031131B2 Overload current protection apparatus 失效
标题翻译：过载电流保护装置
公开(公告)号：US07031131B2
公开(公告)日：2006-04-18
申请号：US10490035
申请日：2002-10-08
申请人： Takahiro Kudo , Junzo Tanaka , Kimitada Ishikawa
发明人： Takahiro Kudo , Junzo Tanaka , Kimitada Ishikawa
IPC分类号： H02H3/08 , H02H9/02
CPC分类号： H02H3/08 , G01R15/205 , H02H1/0007 , H02H1/06
摘要： A current sensor which constitutes an overload protection apparatus and senses a current supplied from a power source to a load is constituted by providing a magnetic sensor having the effect of magnetic impedance (MI), an AC supply means which impresses AC on this sensor, a bias current supply means which supplies a bias current to a bias coil, a peak sensing means which senses the peak or a change in impedance of the magnetic sensor as a change in voltage, and a switch which selects the output of the peak sensing means in accordance with each phase. A holding means which holds switch outputs one after another and an amplification means are provided in common to enable current sensing for each phase. Thus, a range of current sensing is enlarged to reduce power consumption and cost.
摘要翻译：构成过载保护装置的电流传感器通过提供具有磁阻抗（MI）的影响的磁传感器，对该传感器施加AC的AC供给装置，向偏置线圈提供偏置电流的偏置电流供给装置，检测作为电压变化的磁传感器的峰值或阻抗变化的峰值检测装置，以及选择峰值检测装置的输出的开关按照每个阶段。保持一个接一个地保持开关输出的保持装置和放大装置被共同设置，以使每个相位能够进行电流感测。因此，电流检测的范围被扩大以降低功耗和成本。

6. 发明申请

US20060072272A1 Over-current protection device 失效
标题翻译：过电流保护装置
公开(公告)号：US20060072272A1
公开(公告)日：2006-04-06
申请号：US11282716
申请日：2005-11-21
申请人： Takahiro Kudo , Junzo Tanaka , Kimitada Ishikawa
发明人： Takahiro Kudo , Junzo Tanaka , Kimitada Ishikawa
IPC分类号： H02H3/08
CPC分类号： H02H3/08 , G01R15/205 , H02H1/0007 , H02H1/06
摘要： An over-current protection device is constituted of a current detection unit for detecting a current from a power-supply source to a load having a magnetism detection element with a magnetic impedance (MI) effect, an AC-current supply device for supplying an AC current to the detection element, a bias-current supply device for supplying a bias current to a bias coil, a peak detection device for detecting a peak of impedance of the magnetism detection element as a variation of voltage, and a switch corresponding to a phase for selecting an output of the peak detection device. In the current detection unit, a holding device for holding a switch output and an amplifier are disposed in common for detecting the current in each phase, thereby expanding a current detectable range and reducing power consumption and cost.
摘要翻译：过电流保护装置由电流检测单元构成，电流检测单元用于检测从电源到具有磁阻抗（MI）效应的磁检测元件的负载的电流; AC电流供给装置，检测元件的电流，用于向偏置线圈供给偏置电流的偏置电流供给装置，用于检测磁检测元件的阻抗峰值作为电压变化的峰值检测装置，以及对应于相位的开关用于选择峰值检测装置的输出。在电流检测单元中，用于保持开关输出的保持装置和放大器被共同设置，用于检测每相中的电流，从而扩大电流可检测范围并降低功耗和成本。

7. 发明授权

US5557494A Drive circuit of an electromagnetic device 失效
标题翻译：电磁装置的驱动电路
公开(公告)号：US5557494A
公开(公告)日：1996-09-17
申请号：US297548
申请日：1994-08-31
申请人： Minoru Ishikawa , Kimitada Ishikawa
发明人： Minoru Ishikawa , Kimitada Ishikawa
IPC分类号： H01F7/18 , H01H47/32 , H02H9/04 , H01H47/04
CPC分类号： H02H9/047 , H01H47/325
摘要： A drive circuit of an electromagnetic contactor including a series circuit of a surge absorber and a diode connected in parallel with the coil of the contactor, and a transistor connected in parallel with the surge absorber. There are two operation modes. In a first operation mode, the contactor is opened immediately after the contactor has been closed by a starting pulse. In a second operation mode, the contactor is opened after the contactor has been closed by a starting pulse and held by holding pulses following the starting pulse. In the first operation mode, the transistor is kept in an on state for a delay time after starting the contactor. This prevents the current due to counter electromagnetic force of the coil from flowing through the surge absorber before the current is reduced below the allowable level of the surge absorber by the transistor. This makes it possible to protect the surge absorber from being overheated. In the second operation mode, the transistor is turned off immediately after the DC power supply is removed. This makes it possible to open the contactor with little delay.
摘要翻译：电磁接触器的驱动电路，其包括浪涌吸收器的串联电路和与接触器的线圈并联连接的二极管，以及与浪涌吸收器并联连接的晶体管。有两种操作模式。在第一操作模式中，在接触器已经通过起动脉冲关闭之后立即打开接触器。在第二操作模式中，在接触器已经被启动脉冲关闭之后，接触器被打开，并通过保持起始脉冲之后的脉冲保持。在第一操作模式中，在启动接触器之后晶体管保持导通状态达延迟时间。这样可以防止由于晶体管在电流降低到浪涌吸收器的允许电平以下之前，线圈的电磁力流过浪涌吸收器的电流。这使得可以保护浪涌吸收器不被过热。在第二操作模式中，在DC电源被去除之后立即关闭晶体管。这使得可以稍微延迟打开接触器。

8. 发明授权

US07042692B2 Electromagnetic apparatus drive apparatus 失效
标题翻译：电磁装置驱动装置
公开(公告)号：US07042692B2
公开(公告)日：2006-05-09
申请号：US10499445
申请日：2002-12-25
申请人： Koichi Ueki , Kimitada Ishikawa
发明人： Koichi Ueki , Kimitada Ishikawa
IPC分类号： H01H47/00
CPC分类号： H01F7/18 , H01F7/1844 , H01F2007/1888 , H01F2007/1894 , H01H47/325
摘要： Conventionally, a non-conductive period is provided in a region in the vicinity of zero of an AC power voltage via a voltage detection circuit 14 to turn off reliably. The FET 17 maintains the ON state within several switching cycles after the non-conductive interval to rapidly restore the magnetizing coil current, so that the magnetizing coil current rapidly increases. An object is to suppress beat noise in the electromagnetic device. Within a prescribed interval following the non-conductive interval, a partial voltage at a resistor 19 of an output V2 of a mono-stable circuit 20 is added as a bias voltage to a detection voltage of a magnetizing coil current at a resistor 18, and is detected by the IC 11. The IC 11 drives a FET 17 with a constant switching period after the non-conductive interval, thereby preventing the increase in the magnetizing coil current and resolving the problem.
摘要翻译：通常，通过电压检测电路14在交流电源电压零点附近的区域中设置非导通时段，以使其可靠地断开。 FET 17在非导通间隔之后的几个开关周期内保持导通状态，以快速恢复励磁线圈电流，使得励磁线圈电流快速增加。目的是抑制电磁装置中的搏动噪声。在非导通间隔之后的规定间隔内，将单稳态电路20的输出V 2的电阻器19的分压作为偏置电压加到电阻器18的励磁线圈电流的检测电压，并且由IC 11检测.IC 11在非导通间隔之后以恒定的开关周期驱动FET 17，从而防止了磁化线圈电流的增加并解决了问题。

9. 发明授权

US5471360A DC electromagnet apparatus 失效
标题翻译：直流电磁铁装置
公开(公告)号：US5471360A
公开(公告)日：1995-11-28
申请号：US166031
申请日：1993-12-14
申请人： Minoru Ishikawa , Kimitada Ishikawa
发明人： Minoru Ishikawa , Kimitada Ishikawa
IPC分类号： H01H47/32 , H01H47/02
CPC分类号： H01H47/325
摘要： A DC electromagnet apparatus that can prevent an excessive making coil current caused by changes in a power supply voltage. The electromagnet has an operation coil, a switching device, and a current detecting resistor connected in series. A one-shot pulse generating circuit produces a one-shot pulse having a pulse width corresponding to the duration of the making coil current flowing through the operation coil to close the electromagnet. A Miller circuit generates, based on the one-shot pulse, a trapezoidal pulse having a predetermined rising rate, a predetermined peak value, and a pulse width substantially equal to that of the one-shot pulse. A comparator produces an ON control signal that controls the switching device in such a manner that the making coil current becomes proportional to the trapezoidal pulse.
摘要翻译：一种能够防止由电源电压变化引起的线圈电流过大的直流电磁铁装置。电磁铁具有串联连接的工作线圈，开关元件和电流检测电阻。单脉冲发生电路产生具有对应于流过操作线圈的线圈电流的持续时间的脉冲宽度的单触发脉冲以关闭电磁体。米勒电路基于单触发脉冲产生具有预定上升速率，预定峰值和与单次脉冲基本相等的脉冲宽度的梯形脉冲。比较器产生控制开关装置的ON控制信号，使得线圈电流与梯形脉冲成比例。

10. 发明申请

US20050047052A1 Electromagnetic apparatus drive apparatus 失效
标题翻译：电磁装置驱动装置
公开(公告)号：US20050047052A1
公开(公告)日：2005-03-03
申请号：US10499445
申请日：2002-12-25
申请人： Koichi Ueki , Kimitada Ishikawa
发明人： Koichi Ueki , Kimitada Ishikawa
IPC分类号： H01F7/18 , H01H47/32 , H02M7/12 , H01H47/00
CPC分类号： H01F7/18 , H01F7/1844 , H01F2007/1888 , H01F2007/1894 , H01H47/325
摘要： Conventionally, a non-conductive period is provided in a region in the vicinity of zero of an AC power voltage via a voltage detection circuit 14 to turn off reliably. The FET 17 maintains the ON state within several switching cycles after the non-conductive interval to rapidly restore the magnetizing coil current, so that the magnetizing coil current rapidly increases. An object is to suppress beat noise in the electromagnetic device. Within a prescribed interval following the non-conductive interval, a partial voltage at a resistor 19 of an output V2 of a mono-stable circuit 20 is added as a bias voltage to a detection voltage of a magnetizing coil current at a resistor 18, and is detected by the IC 11. The IC 11 drives a FET 17 with a constant switching period after the non-conductive interval, thereby preventing the increase in the magnetizing coil current and resolving the problem.
摘要翻译：通常，通过电压检测电路14在交流电源电压零点附近的区域中设置非导通时段，以使其可靠地断开。 FET 17在非导通间隔之后的几个开关周期内保持导通状态，以快速恢复励磁线圈电流，使得励磁线圈电流快速增加。目的是抑制电磁装置中的搏动噪声。在非导通间隔之后的规定间隔内，单稳态电路20的输出V2的电阻器19的分压作为偏置电压被加到电阻器18处的励磁线圈电流的检测电压，并且由IC 11检测.IC 11在非导通间隔之后以恒定的开关周期驱动FET 17，从而防止磁化线圈电流的增加并解决问题。

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