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公开(公告)号：US20220200236A1
公开(公告)日：2022-06-23
申请号：US17604766
申请日：2020-05-25
Applicant: Mitsubishi Electric Corporation
Inventor： Yoshimichi SAITO , Shuji WAKAIKI , Hiroshi IKARASHI , Shingo TSUDA , Hideyasu MACHII , Masato MATSUBARA
Abstract: A laser beam generation device includes power supply units, LD modules, a combiner, and a control device. The LD modules receive currents from the power supply units, and output laser beams. The combiner collects the laser beams and outputs one laser beam. The control device generates control signals such that power of the laser beam becomes a laser output setting value and such that the currents become current command values. Phases of pulses of the control signals are shifted from each other by 60 degrees.
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Patent Agency Ranking
公开(公告)号：US20220376604A1
公开(公告)日：2022-11-24
申请号：US17767199
申请日：2020-11-10
Applicant: Mitsubishi Electric Corporation
Inventor： Hiroshi IKARASHI , Hideyasu MACHII , Naoki TAKIGAWA
Abstract: A first drive circuit is connected to a first end of a primary winding of a pulse transformer. A second drive circuit is connected to a second end of the primary winding of the pulse transformer. A voltage clamp unit clamps a voltage of a semiconductor element at a specified voltage when a voltage output from a secondary winding of the pulse transformer is negative. A current detection circuit detects current flowing through the semiconductor element and outputs a detection signal. A control circuit controls the first drive circuit and the second drive circuit based on the detection signal. A current limiting circuit imposes a limit on current flowing through the primary winding of the pulse transformer based on the detection signal.
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公开(公告)号：US20200343155A1
公开(公告)日：2020-10-29
申请号：US16961143
申请日：2019-01-09
Applicant: Mitsubishi Electric Corporation
Inventor： Hiroyuki KIYONAGA , Kenta FUJII , Tomohito FUKUDA , Shuji WAKAIKI , Takashi KUMAGAI , Hiroshi IKARASHI
Abstract: A power conversion device that provides high heat dissipation and is easy to assemble. A power conversion device includes: a first heat dissipator; a second heat dissipator; a printed board having a first circuit pattern formed thereon; a first insulating member provided between first heat dissipator and printed board; a switching element including an electrode portion electrically bonded to first circuit pattern with a first bonding member interposed therebetween; a first fixing member bonded to an exposed surface of electrode portion; a heat dissipating member having one end bonded to first fixing member, and the other end provided between the switching element and second heat dissipator; a second insulating member sandwiched between second heat dissipator and switching element; and an installation portion.
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公开(公告)号：US20190356109A1
公开(公告)日：2019-11-21
申请号：US16342995
申请日：2017-04-17
Applicant: Mitsubishi Electric Corporation
Inventor： Shingo TSUDA , Takeshi MORIMOTO , Taichiro TAMIDA , Teruaki FUKUOKA , Hiroshi IKARASHI , Akihiko IWATA
Abstract: A laser diode-driving power supply includes a constant current source that supplies current to LDs, a switching element connected in parallel to the LDs, and a control unit that controls the constant current source and performs on-off control of the switching element. The control unit compares a first current command value and a second current command value for controlling current output from the constant current source, and when the second current command value input after the first current command value is smaller than the first current command value, applies to the LDs a voltage in the range of a voltage at which current flows through the LDs to a voltage less than the lasing threshold of the LDs when there is no output from the LDs.
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公开(公告)号：US20200290155A1
公开(公告)日：2020-09-17
申请号：US16464273
申请日：2017-02-14
Applicant: Mitsubishi Electric Corporation
Inventor： Taichiro TAMIDA , Shingo TSUDA , Teruaki FUKUOKA , Hiroshi IKARASHI , Akihiko IWATA , Takeshi MORIMOTO
IPC: B23K26/352 , H01S5/062 , H01S5/068
Abstract: A laser diode driving power source of a laser machining device that radiates laser light emitted from an LD to a workpiece to machine the workpiece includes a power converter including a switching device, to supply a current to the LD, and a control unit to control a switching operation of the switching device. A value smaller than a value that is n times a time constant for laser machining is set as a switching period of the switching device in the control unit, the n is larger than 1, and the time constant for laser machining is a value obtained by dividing a surface roughness required for machining of the workpiece by a moving velocity of the workpiece.
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公开(公告)号：US20170302190A1
公开(公告)日：2017-10-19
申请号：US15516948
申请日：2016-01-04
Applicant: MITSUBISHI ELECTRIC CORPORATION
Inventor： Hiroshi IKARASHI , Futoshi OKAWA , Hiroyuki NAKAMURA
CPC classification number: H02M7/003 , H02M1/32 , H02M7/493 , H02M7/537 , H02M7/53875 , H03K5/24 , H05K7/209
Abstract: In a power converter apparatus, a first power converter circuit is configured of first power semiconductor devices, and a second power converter circuit is connected in parallel to the first power converter circuit, and is configured of second power semiconductor devices. A control circuit generates a control signal for controlling each power semiconductor device of the first and second power converter circuits. A timing control signal generator circuit compares a first amount of current flowing through the first power semiconductor devices with a second amount of current flowing through the second power semiconductor devices, and generate a timing control signal for controlling a timing of a rise or a fail of each of the control signals inputted to the first and second power converter circuits, based on a comparison result. A timing correction circuit controls the control signals to correct the timing of the rise or the fall thereof.
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