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.

公开(公告)号：US20180278018A1

公开(公告)日：2018-09-27

申请号：US15759841

申请日：2015-12-01

Applicant: Mitsubishi Electric Corporation

Inventor： Shingo TSUDA ,  Takeshi MORIMOTO ,  Taichiro TAMIDA ,  Takashi HASHIMOTO

IPC: H01S5/042 ,  H01S5/40 ,  H01S5/062 ,  H01S5/0625 ,  H03K7/08

Abstract: A current control device for controlling, on the basis of a current command value input from an external device, a light-emitting unit current flowing from a power supply device to a light-emitting unit that includes one or a plurality of laser diodes, includes: a switching element coupled in parallel to the light-emitting unit; and a pulse-width-modulation control circuit unit to provide pulse width modulation control of the switching element in a case in which an output current output from the power supply device is greater than a present current command value or a next current command value upon a start of supply of, upon a termination of supply of, or during supply of, the light-emitting unit current.

公开(公告)号：US20210151946A1

公开(公告)日：2021-05-20

申请号：US17048608

申请日：2018-04-24

Applicant: Mitsubishi Electric Corporation

Inventor： Tomohiro KYOTO ,  Taira OGITA ,  Takeshi MORIMOTO ,  Hideyasu MACHII ,  Hiroaki KUROKAWA

IPC: H01S3/00 ,  H01S3/09 ,  H01S3/04 ,  B23K26/062

Abstract: A laser processor includes a laser oscillator housed in a closed housing, an oscillator controller that controls the laser oscillator and is supplied with electric power by a first primary power supply, a dehumidifier that is housed in the closed housing and operates using electric power supplied from a second primary power supply, and a dehumidification controller that controls the dehumidifier and is supplied with electric power by the second primary power supply.

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

IPC: H01S5/042 ,  H01S5/40 ,  H02M3/335 ,  H02M1/08 ,  B23K26/06

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.