Osaka, Japan
Osaka, Japan

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Patent
Daihen Corporation | Date: 2016-11-08

A contactless power transmission system is provided for supplying power contactlessly from a power transmission apparatus to a power reception apparatus. The power transmission apparatus includes a high-frequency power source device for outputting a constant high-frequency current, and power transmission units having serial resonance circuits. The power reception apparatus includes power reception units having parallel resonance circuits. A power transmission coil of the power transmission unit and a power reception coil of the power reception unit are magnetically coupled. The power transmission units are connected in series, while the power reception units are connected in parallel. Power is transmitted from the power transmission unit to the power reception unit by magnetic field resonance.


Patent
Daihen Corporation | Date: 2017-01-04

There is provided a carrier device that has a linkage arm mechanism, in particular, a carrier device that cools the linkage arm mechanism and can reduce the impact of radiation heat from a work that is in a high temperature state. A carrier device is a carrier device that includes a linkage arm mechanism and a pivot shaft, and the linkage arm mechanism includes lower arms and upper arms, and one ends of which are respectively connected to the lower arms, and horizontal movement members that support a work that is connected to the other ends of the upper arms, and cooling plates are respectively arranged between the upper arms, and the horizontal movement members.


Patent
Daihen Corporation | Date: 2017-05-17

A contactless power transmission system C is provided for supplying power contactlessly from a power transmission apparatus A to a power reception apparatus B. The power transmission apparatus A includes a high-frequency power source device 1 for outputting a constant high-frequency current, and power transmission units 21, 22, 23 having serial resonance circuits. The power reception apparatus B includes power reception units 31, 32, 33 having parallel resonance circuits. A power transmission coil Lt1, Lt2, Lt3 of the power transmission unit 21, 22, 23 and a power reception coil Lr1, Lr2, Lr3 of the power reception unit 31, 32, 33 are magnetically coupled. The power transmission units 21, 22, 23 are connected in series, while the power reception units 31, 32, 33 are connected in parallel. Power is transmitted from the power transmission unit 21, 22, 23 to the power reception unit 31, 32, 33 by magnetic field resonance.


Patent
Daihen Corporation | Date: 2017-06-28

Provided is an arc welding control method that performs welding by alternately switching feed rate (Fw) for welding wire (1) between a forward feed period and a reverse feed period, controlling welding voltage (Vw) on the basis of a voltage setting value, and repeating a short period and an arc period, wherein a smoothed value for welding voltage (Vw) is detected and a cycle (Tf) of the feed rate (Fw) is feedback controlled such that this smoothed value for welding voltage and the voltage setting value are the same. Thereby, the cycle (Tf) of the feed rate (Fw) is made appropriate in correspondence with changes in the metal transfer mode accompanying changes in voltage setting value; therefore, it is possible to control occurrences of synchronization offsets in the cycle of forward feed and reverse feed for the feed rate (Fw) and the cycle of the short period and the arc period, and maintain stable welding conditions.


Patent
Daihen Corporation and Fukuda Metal Foil & Powder Co. | Date: 2017-06-28

A metal powder for additive manufacturing includes: not less than 0.2 mass% and not more than 1.3 mass% of aluminum; and a balance including copper and an incidental impurity.


Patent
Daihen Corporation | Date: 2016-01-07

There is provided a carrier device that has a linkage arm mechanism, in particular, a carrier device that cools the linkage arm mechanism and can reduce the impact of radiation heat from a work that is in a high temperature state. A carrier device is a carrier device that includes a linkage arm mechanism and a pivot shaft, and the linkage arm mechanism includes lower arms and upper arms, and one ends of which are respectively connected to the lower arms, and horizontal movement members that support a work that is connected to the other ends of the upper arms, and cooling plates are respectively arranged between the upper arms, and the horizontal movement members.


A control circuit reduces switching loss by periodically stopping switching elements, and reduces the difference between the time for which positive switching elements are in on state and the time for which negative switching elements are in on state. The control circuit includes a command value signal generator generating command value signals Xu1, Xv1, and Xw1 from line voltage command value signals Xuv, Xvw, and Xwu, and includes a PWM signal generator generating PWM signals by the command value signals Xu1, Xv1, and Xw1. The command value signals Xu1, Xv1, and Xw1 are continuously at 0 for a predetermined period, and are continuously at 2 for another period. This enables reducing the difference between the period for which the PWM signals are low and the period for which they are high1.


Patent
Daihen Corporation | Date: 2016-11-16

To achieve a good welding state by stabilizing a feeding state of a welding wire, in arc welding of alternating feeding of the welding wire between a forward feeding and a reverse feeding periodically according to a push-pull feeding control. The welding is performed in a manner of feeding the welding wire according to the push-pull feeding control using a push-side feeding motor which rotates in the forward feeding direction at a constant feeding rate based on a push feeding-rate correction signal Ps and a pull-side feeding motor which alternates a forward feeding rotation and a reverse feeding rotation periodically based on a pull feeding-rate setting signal Fr, and generating short-circuiting periods and arc periods. An average feeding rate Fad of the pull-side feeding motor is detected and the push feeding-rate correction signal Ps is corrected to the detected average feeding rate Fad of the pull-side feeding motor. Consequently, even if a feeding resistance changes and hence the average feeding rate Fad of the pull-side feeding motor changes, as a feeding rate Fd of the push-side feeding motor is controlled to follow the average feeding rate, the feeding state of the welding wire becomes stable.


Patent
Daihen Corporation | Date: 2016-11-23

To stabilize arc welding in which feeding of a welding wire is altered between forward feeding and reverse feeding periodically. The welding is performed in a manner of alternating the feeding of the welding wire between the forward feeding and the reverse feeding periodically according to a feeding rate pattern of a feeding-rate setting signal Fr constituted of a forward feeding amplitude Ws, a reverse feeding amplitude Wr, a forward feeding period Ts and a reverse feeding period Tr, stored in correspondence to an average feeding-rate setting signal Far, and generating short-circuiting periods and arc periods. An average value of a feeding rate Fw during the welding is detected, and at least one of the forward feeding amplitude Ws, the reverse feeding amplitude Wr, the forward feeding period Ts or the reverse feeding period Tr is changed so that the average value of the feeding rate Fw equals the average feeding-rate setting signal Far, and thereby the feeding rate pattern is automatically corrected. Consequently, even if a feeding resistance of a feeding path changes, as the average value of the feeding rate Fw is always maintained at a constant value, stability of a welding state can be improved.


Patent
Daihen Corporation | Date: 2016-06-03

A method is provided for evaluating the reliability of an electrical power measuring device for measuring high-frequency electrical power. To build an evaluation system, the measuring device, together with a reference electrical power measuring device, is arranged between a high-frequency power supply device and an artificial reproduction load, which includes an impedance conversion device and a reference load. Using this system, an uncertainty range of an electrical power measured value measured by the measuring device is calculated, according to a prescribed calculation formula, from the electrical power measured value, and a judgment is made as to whether or not the electrical power measured value measured by the measuring device is within the uncertainty range. If it is within the uncertainty range, the measuring device is evaluated as being reliable, while if it is not within the uncertainty range, the measuring device is evaluated as being unreliable.

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