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公开(公告)号：US11894723B2
公开(公告)日：2024-02-06
申请号：US17604407
申请日：2020-01-30
Inventor： Fumiiki Yoneda , Kenji Hanamura , Masayuki Nakahara
Abstract: An electric tool includes an AC motor (an electric motor) and a control unit. The AC motor includes a permanent magnet and a coil. The control unit is configured to perform control on operation of the AC motor. The control performed by the control unit includes field weakening control. In the field weakening control, the control unit causes a flux-weakening current to flow through the coil. The flux-weakening current is a current that generates, in the coil, a magnetic flux that weakens a magnetic flux of the permanent magnet.
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公开(公告)号：US11329488B2
公开(公告)日：2022-05-10
申请号：US17258092
申请日：2019-06-19
Inventor： Wataru Horio , Hiroyuki Fujii , Kenji Hanamura , Kota Maeba
Abstract: The converter circuit includes an inverter. The converter circuit receives DC power from a DC power supply (such as a solar cell or a storage battery unit), has the DC power converted into AC power by at least the inverter, and outputs the AC power to a load or a power grid. When acquiring information that two or more types of power curtailment causes have arisen, a control circuit makes the converter circuit limit power output to a maximum degree of power curtailment out of two or more degrees of power curtailment according to specifics of the two or more types of power curtailment causes.
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3.发明授权Electric device including a switch circuit, a current limit circuit and a clamp swith, for driving a power switch 有权包括用于驱动电源开关的开关电路，限流电路和钳位开关的电气装置公开(公告)号：US09479157B2
公开(公告)日：2016-10-25
申请号：US14687953
申请日：2015-04-16
Inventor： Kenji Hanamura , Shun Kazama , Hajime Hida
IPC: H03K3/00 , H03K17/687 , H03K17/567 , H02M7/00 , H03K17/0812 , B60L3/00 , B60L7/14 , B60L11/18 , B60L15/00 , H03K17/08
CPC classification number: H03K17/567 , B60L3/003 , B60L7/14 , B60L11/1803 , B60L15/007 , B60L2210/10 , B60L2220/14 , H02M7/003 , H03K17/08122 , H03K17/687 , H03K2017/0806 , Y02T10/645 , Y02T10/7005 , Y02T10/7216
Abstract: A drive device according to one aspect of the disclosure includes a control terminal connector, a switch circuit, a current limit circuit, and a clamp switch on a circuit board. The clamp switch is located in a second quadrant or a fourth quadrant of four quadrants, where the four quadrants are partitioned by two mutually orthogonal virtual lines with the current limit circuit set as an origin and the four quadrants consist of a first quadrant including an area where the control terminal connector is located, the second quadrant, a third quadrant, and the fourth quadrant, in clockwise order.
Abstract translation: 根据本公开的一个方面的驱动装置包括控制端子连接器，开关电路，限流电路和电路板上的钳位开关。 钳位开关位于四个象限的第二象限或第四象限中，其中四个象限由两个相互正交的虚拟线分隔，电流限制电路设置为原点，四个象限由包含区域的第一象限组成 控制终端连接器所在的位置，第二象限，第三象限和第四象限。
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公开(公告)号：US11451163B2
公开(公告)日：2022-09-20
申请号：US16753475
申请日：2018-09-13
Inventor： Kazunori Kidera , Kenji Hanamura
Abstract: A power converter 10 includes: flying capacitor circuits 11 and 12 connected in series so as to be in parallel with a DC power supply; flying capacitor circuits 13 and 14 connected in series so as to be in parallel with the DC power supply; switching elements S1 and S2 connected in series between output terminals of the flying capacitor circuits 11 and 12; switching elements S3 and S4 connected in series between output terminals of the flying capacitor circuits 13 and 14; a first output end OUT1 provided at a midpoint between the switching elements S1 and S2; and a second output end OUT2 provided at a midpoint between the switching elements S3 and S4, wherein a node between the flying capacitor circuits 11 and 12 and a node between the flying capacitor circuits 13 and 14 are connected to a midpoint of a DC power supply voltage.
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公开(公告)号：US09356516B2
公开(公告)日：2016-05-31
申请号：US14530737
申请日：2014-11-01
Inventor： Fumito Kusama , Hajime Hida , Shun Kazama , Kenji Hanamura
IPC: H03K3/00 , H02M3/158 , H02M1/08 , H03K17/0412 , H02M1/00 , H02M7/5387
CPC classification number: H02M3/158 , H02M1/08 , H02M7/5387 , H02M2001/0054 , H03K17/04123 , H03K2217/0036 , H03K2217/009 , Y02B70/1491
Abstract: A driving apparatus includes a first potential line that applies a first potential, a second potential line that applies a second potential, a coil including a first terminal and a second second terminal that is connected to a control terminal of a switching element, a charging switch connected between the first potential line and the first terminal of the coil, a clamp switch provided between the first potential line and the second terminal of the coil, a reverse-flow blocking diode connected in series with the clamp switch between the first potential line and the second terminal of the coil, and a control circuit that controls the charging switch and the clamp switch.
Abstract translation: 驱动装置包括施加第一电位的第一电位线，施加第二电位的第二电位线，包括连接到开关元件的控制端子的第一端子和第二第二端子的线圈，充电开关 连接在第一电位线和线圈的第一端之间，设置在第一电位线和线圈的第二端之间的钳位开关，与第一电位线和第二电位线之间的钳位开关串联连接的反向阻流二极管 线圈的第二端子，以及控制充电开关和钳位开关的控制电路。
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Patent Agency Ranking
公开(公告)号：US12255538B2
公开(公告)日：2025-03-18
申请号：US17636676
申请日：2020-06-22
Inventor： Shogo Hirota , Kenji Hanamura , Takashi Shirakawa
IPC: H02M3/335
Abstract: For power transfer from a first DC part to a second DC part in a dual active bridge (DAB) converter by stepping down a voltage, a first bridge circuit includes a period in which the first DC part and a primary winding of an insulated transformer conduct and a period in which ends of a primary winding of the insulated transformer are short-circuited in the first bridge circuit. A second bridge circuit includes a rectification period. A control circuit variably controls a phase difference between a first leg a the second leg, variably controls a simultaneous off period of a fifth switching element and a sixth switching element, and variably controls a simultaneous off period of a seventh switching element and an eighth switching element.
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公开(公告)号：US12083652B2
公开(公告)日：2024-09-10
申请号：US17604894
申请日：2020-01-30
Inventor： Kenji Hanamura , Masayuki Nakahara , Fumiiki Yoneda
IPC: B25B21/02 , B25B23/147 , B25F5/00 , H02P21/22
CPC classification number: B25B21/02 , B25B23/1475 , B25F5/00
Abstract: An electric power tool includes an electric motor (AC motor), an impact mechanism, an impact detecting unit, and a measuring unit. The impact mechanism performs an impact operation that generates impacting force by receiving motive power from the electric motor. The impact detecting unit determines whether or not the impact operation is being performed. The measuring unit measures at least one of a d-axis current or a q-axis current, each of which is supplied to the electric motor. The impact detecting unit determines, based on at least one of a measured value (current measured value) of the d-axis current or a measured value (current measured value) of the q-axis current, whether or not the impact operation is being performed. The measured values (current measured values) of the d-axis current and the q-axis current have been obtained by the measuring unit.
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公开(公告)号：US12136886B2
公开(公告)日：2024-11-05
申请号：US17636184
申请日：2020-06-22
Inventor： Shogo Hirota , Kenji Hanamura , Takashi Shirakawa
Abstract: For power transfer from a first DC part to a second DC part in a dual active bridge (DAB) converter by stepping up a voltage, the second bridge circuit includes a period in which a secondary winding of an insulated transformer and the second DC part conduct and a period in which ends of the secondary winding of the insulated transformer are short-circuited in the second bridge circuit. A control circuit fixes a phase difference between a first leg a the second leg, variably controls a simultaneous off period of a fifth switching element and a sixth switching element, and variably controls a simultaneous off period of a seventh switching element and an eighth switching element.
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公开(公告)号：US11742776B2
公开(公告)日：2023-08-29
申请号：US17613016
申请日：2020-02-21
Inventor： Kenji Hanamura , Wataru Horio , Hiroyuki Fujii , Shogo Hirota
IPC: H02M7/483 , H02M1/00 , H02M1/32 , H02M7/5395
CPC classification number: H02M7/4837 , H02M1/0009 , H02M1/0095 , H02M1/325 , H02M7/483 , H02M7/5395
Abstract: An inverter circuit includes a plurality of flying capacitors and converts a DC voltage supplied from a DC power supply into an AC voltage. A filter circuit approximates a waveform of an output voltage of the inverter circuit to a sinusoidal wave. An excess current protection circuit supplies a block signal for turning off a plurality of switching elements to the driving circuit when an excess current is detected. When at least one of an abnormal voltage in any of the plurality of flying capacitors and an abrupt change in an output voltage of the power converter occurs, voltages other than a positive voltage of the DC power supply, a negative voltage of the DC power supply, and a zero voltage are restricted from being output from the inverter circuit.
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公开(公告)号：US11411428B2
公开(公告)日：2022-08-09
申请号：US16582156
申请日：2019-09-25
Inventor： Kota Maeba , Akihiro Kikuchi , Wataru Horio , Hiroyuki Fujii , Kenji Hanamura , Tomoki Ito
IPC: H02J1/10 , H02J13/00 , H02M7/48 , H02J3/38 , H02J7/35 , G05F1/46 , H02M3/156 , H02M1/00 , H02J3/32 , H02J1/12
Abstract: In a power converter including: a first DC-DC converter, an inverter, and a control circuit, a second DC-DC converter that controls an input and an output of a power storage unit is connectable to a DC bus. The control circuit deactivates a reverse power flow suppression function for suppressing a reverse power flow from the inverter to a power system when the second DC-DC converter is not connected to the DC bus and activates the reverse power flow suppression function when the second DC-DC converter is connected to the DC bus.
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