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1. 发明授权

US11555863B2 Ground fault detection device 有权
公开(公告)号：US11555863B2
公开(公告)日：2023-01-17
申请号：US17070044
申请日：2020-10-14
申请人： Yazaki Corporation
发明人： Yoshihiro Kawamura
IPC分类号： G01R31/00 , G01R31/52 , B60L3/00 , H02J7/00 , H02J7/34 , B60L50/60
摘要： A ground fault detection device compatible with Y capacitors of various capacities without increasing the capacitance of a detection capacitor is provided. The ground fault detection device includes a first detection capacitor that operates as a flying capacitor, a second detection capacitor that operates as a flying capacitor, a control unit measures the charging voltage of the first detection capacitor and the second detection capacitor, a switching unit that switches between a state using a first measurement system in which the first detection capacitor is charged with the high voltage battery and the charging voltage of the first detection capacitor is measured by the control unit, and a state using a second measurement system in which the second detection capacitor is charged with the high voltage battery and the charging voltage of the second detection capacitor is measured by the control unit.

2. 发明授权

US11187759B2 Ground fault detection device 有权
公开(公告)号：US11187759B2
公开(公告)日：2021-11-30
申请号：US16712557
申请日：2019-12-12
申请人： Yazaki Corporation
发明人： Yoshihiro Kawamura
IPC分类号： G01R31/52 , G01R27/26 , H02J7/34 , G01R31/50 , G01R27/02
摘要： A ground fault detection device comprising a capacitor which serves as a flying capacitor, a switch group which switches between a V0-charging path, a Vcn-charging path, a Vcp-charging path and a charging voltage measurement path for the capacitor, and a controller which controls the switch group and calculates an insulation resistance based on V0, Vcn and Vcp, wherein V0 is a measured value on the V0-charging path, Vcn is a measured value on the Vcn-charging path, and Vcp is a measured value on the Vcp charging path, wherein, if Vcn can be considered as zero, the controller switches to the Vcp-charging path and performs measurement while keeping a charged state of the capacitor, wherein Vcp obtained after discharging the capacitor is subtracted from a measured value obtained from the measurement in order to calculate Vcn.

3. 发明授权

US10800263B2 Ground fault detection apparatus 有权
公开(公告)号：US10800263B2
公开(公告)日：2020-10-13
申请号：US16295362
申请日：2019-03-07
申请人： Yazaki Corporation
发明人： Yoshihiro Kawamura
IPC分类号： B60L3/00 , G01R27/02 , G01R31/50
摘要： A ground fault detection apparatus includes a control unit, a detection capacitor, a positive-electrode-side first resistor connected to positive-electrode side of a high-voltage battery, a negative-electrode-side first resistor connected to negative-electrode side, a positive-electrode-side second resistor having one end grounded and another end, voltage of which being measured by the control unit, a negative-electrode-side second resistor having one end grounded, a positive-electrode-side C contact switch as a twin relay that alternatively switches connection destination of one end of the detection capacitor between a path including the positive-electrode-side first resistor and a path including the positive-electrode-side second resistor based on instruction from the control unit, and a negative-electrode-side C contact switch as a twin relay that alternatively switches connection destination of another end of the detection capacitor between a path including the negative-electrode-side first resistor and a path including the negative-electrode-side second resistor based on instruction from the control unit.

4. 发明授权

US10764998B2 Electronic circuit board 有权
公开(公告)号：US10764998B2
公开(公告)日：2020-09-01
申请号：US16134257
申请日：2018-09-18
申请人： Yazaki Corporation
发明人： Masayuki Naohara , Tomohiro Sugiura , Yoshihiro Kawamura
IPC分类号： H05K1/03 , H05K1/09 , H05K1/11 , H05K1/18 , H05K3/30 , H05K3/34 , H05K5/06 , H05K1/02 , H01H45/04 , H05K5/00 , H05K3/06
摘要： An electronic circuit board includes electronic components to be mounted; a plurality of hard rigid board portions each of which has an insulating insulator and a conductive circuit pattern and electrically connects the mounted electronic component to the circuit pattern; and at least one soft flexible board portion which has an insulating insulator, has a conductive circuit pattern electrically connected to each of the circuit patterns of at least two rigid board portions among the plurality of rigid board portions, and is integrated with the rigid board portions which are electrically connected to the circuit pattern thereof. A plurality of contact relays as the electronic components is dispersedly arranged on the respective rigid board portions.

5. 发明授权

US10613156B2 Ground fault detection apparatus 有权
公开(公告)号：US10613156B2
公开(公告)日：2020-04-07
申请号：US16126934
申请日：2018-09-10
申请人： Yazaki Corporation
发明人： Yoshihiro Kawamura
IPC分类号： G01R31/00 , G01R31/50 , B60L58/10 , G01R31/64 , B60L3/00 , G01R27/02 , G01R31/14
CPC分类号： G01R31/50 , B60L3/0069 , B60L58/10 , G01R27/025 , G01R31/14 , G01R31/64 , G01R31/006
摘要： A ground fault detection apparatus connected to an ungrounded battery supplying power via a step-up circuit to a load and calculating insulation resistance of a system provided with the battery to detect a ground fault includes a capacitor, a set of switches switching among a V0 measurement path, a Vcn measurement path, and a Vcp measurement path, a bypass resistor connected in parallel with the negative-electrode-side insulation resistance via a normally open switch, and a control unit configured to, when the insulation resistance is to be calculated based on a charge voltage measurement value of the capacitor in each of the measurement paths, in a case in which the charge voltage measurement value of the capacitor in the Vcn measurement path is regarded as 0, switch the normally open switch to a closed state and measure the charge voltage of the capacitor in the Vcn measurement path.

6. 发明授权

US10379150B2 Earth fault detector 有权
公开(公告)号：US10379150B2
公开(公告)日：2019-08-13
申请号：US15820500
申请日：2017-11-22
申请人： Yazaki Corporation
发明人： Yoshihiro Kawamura
IPC分类号： G01R31/02 , G01R31/382 , B60L3/00 , G01R31/00
摘要： A earth fault detector has a controller, a detection capacitor, a positive side first resistance connected to a positive side of a high voltage battery, a negative side first resistance connected to a negative side thereof, a positive side second resistance, a negative side second resistance, a positive side C contact switch, and a negative side C contact switch. The positive side C contact switch switches a connection destination of a first end of the detection capacitor to either a path including the positive side first resistance or a path including the positive side second resistance based on an instruction of the controller. The negative side C contact switch switches a connection destination of a second end thereof to either a path including the negative side first resistance or a path including the negative side second resistance based on an instruction of the controller.

7. 发明授权

US09939495B2 Voltage detecting circuit and voltage detecting method 有权
公开(公告)号：US09939495B2
公开(公告)日：2018-04-10
申请号：US15291888
申请日：2016-10-12
申请人： YAZAKI CORPORATION
发明人： Kyohei Yamamoto , Yoshihiro Kawamura
IPC分类号： H02J7/00 , G01R31/36
CPC分类号： G01R31/3696 , G01R31/362 , G01R31/3631
摘要： A voltage detecting circuit includes a ground potential unit, a DC power supply which is insulated from the ground potential unit, a capacitor to which voltage from the DC power supply is applied, a control unit which controls charging and discharging of the capacitor, a charging circuit that includes the DC power supply, the capacitor and a charging path through which the capacitor is charged, and a discharging circuit that includes the capacitor and a discharging path through which the capacitor is discharged. The control unit includes a calculation unit which calculates a voltage value of the DC power supply, based on an actual capacitance value C of the capacitor which is obtained by both-end voltage of the capacitor corresponding to a first time and the both-end voltage of the capacitor corresponding to a second time.

8. 发明授权

US09423446B2 Insulation state detecting device 有权
标题翻译：绝缘状态检测装置
公开(公告)号：US09423446B2
公开(公告)日：2016-08-23
申请号：US14340194
申请日：2014-07-24
申请人： YAZAKI CORPORATION , HONDA MOTOR CO., LTD.
发明人： Yoshihiro Kawamura , Mitsunori Matsumoto
IPC分类号： G01R31/14 , G01R31/02 , G01R27/18 , B60L3/00 , B60L3/04 , G01R31/00
CPC分类号： G01R31/14 , B60L3/0069 , B60L3/04 , B60L2240/547 , B60L2270/147 , G01R27/18 , G01R31/006 , G01R31/021 , G01R31/025
摘要： An insulation state detecting device includes a positive side input terminal connected to a positive side power line of a high voltage DC power supply, a negative side input terminal connected to a negative side power line of the high voltage DC power supply, a ground electrode, a controller that detects insulation states between the positive side power line and the negative side power line and the ground electrode based on a charge voltage of a flying capacitor, and an equilibrium state forming circuit that promotes an operation of transiting a charge state of a positive side electrostatic capacitance between the positive side power line and the ground electrode and a charge state of a negative side electrostatic capacitance between the negative side power line and the ground electrode from non-equilibrium states to equilibrium states.
摘要翻译：绝缘状态检测装置包括：与高压直流电源的正极侧电力线连接的正极侧输入端子，与高压直流电源的负极侧电力线连接的负极侧输入端子，接地电极，基于飞行电容器的充电电压来检测正侧电力线与负侧电力线和接地电极之间的绝缘状态的控制器，以及促进正向充电状态的运行的平衡状态形成电路的控制器正侧电力线和接地电极之间的侧面静电电容和负侧电力线与接地电极之间的负侧静电电容从非平衡态到平衡态的充电状态。

9. 发明授权

US11047923B2 Ground fault detection device 有权
公开(公告)号：US11047923B2
公开(公告)日：2021-06-29
申请号：US16806018
申请日：2020-03-02
申请人： Yazaki Corporation
发明人： Yoshihiro Kawamura
IPC分类号： G01R31/52
摘要： A ground fault detection device that is connected to an ungrounded battery, estimates an insulation resistance of the system provided with the battery, and detects a ground fault, includes a capacitor that operates as a flying capacitor, two C-contact switches that switch a V0 charging path including the battery and the capacitor, a Vcn charging path including the battery, a negative-side insulation resistance that is an insulation resistance between a negative side of the battery and ground, and the capacitor, a Vcp charging path including the battery, a positive-side insulation resistance insulation resistance that is an insulation resistance between a positive-side insulation resistance of the battery and ground, and the capacitor, and a measurement path that serves both a charge voltage measurement and a discharge of the first capacitor, and an optical MOS-FET capable of blocking charge inflow to and charge outflow from the capacitor.

10. 发明授权

US10416223B2 Ground fault detection device 有权
公开(公告)号：US10416223B2
公开(公告)日：2019-09-17
申请号：US16141462
申请日：2018-09-25
申请人： Yazaki Corporation
发明人： Yoshihiro Kawamura
IPC分类号： G01R31/02 , H01M10/48 , H02J7/00
摘要： Provided is a ground fault detection device including a detection capacitor, a positive electrode power supply side resistor, a negative electrode power supply side resistor, a positive electrode ground side resistor, a negative electrode ground side resistor, a positive electrode side twin relay selectively switching a connection point of one end of the detection capacitor; a negative electrode side twin relay selectively switching a connection point of the another end of the detection capacitor, and a controller controlling switching of the positive electrode side twin relay and the negative electrode side twin relay, and calculating an insulation resistance of the system provided with the high-voltage battery based on a charging voltage of the detection capacitor, and determines there is a possibility that a sticking fault has occurred.

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