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| Number | Title | Issue Date |
| 7368891 | Charge control method of capacitor in thyristor converter Charging time of a capacitor is shortened while avoiding erroneous firing due to distortion of a power supply voltage and sustaining an inrush current at a constant level. In the charge control method of a capacitor in a thyristor converter comprising a thyristor fo... | 05/06/2008 |
| 7166977 | Indurstrial robot controlling device Since a release voltage to a brake is applied by a plurality of series-connected contacts and at least one contact is a normally open contact of a relay for controlling a driving power supply of a motor, a control apparatus having a high safety characteristic for an... | 01/23/2007 |
| 7136723 | Robot controller A robot controller for teaching a robot with high efficiency. The robot controller including command storage unit (21) where a movement command and a work command are stored, command identifying unit (24) for discriminating between the movement and wor... | 11/14/2006 |
| 7061508 | Loading pattern generating method A method of loading a pallet that begins by showing a plan view of the pallet on a display screen. The direction and patterns of articles to be placed on the pallet are shown in the plan view. The pattern of articles is then moved to a selected position in the plan ... | 06/13/2006 |
| 6919701 | Robot controller A robot controller for keeping the posture of a tool in a task coordinate system by a simple processing and allowing a robot to perform flexible translational motion. A robot controller for controlling a motor for driving a joint by a control circuit having a positi... | 07/19/2005 |
| 6872915 | High speed carbon dioxide gas welding method An arc welding method which suppresses sputtering and which makes it possible to obtain a smooth bead penetration surface shape as in MIG or MAG welding, without producing undercuts or bumping beads. A carbon dioxide gas welding method effecting welding at welding r... | 03/29/2005 |
| 6847185 | Apparatus for switching windings of AC three-phase motor It is an object to provide a winding switching device of a three-phase AC motor having a small size at a low cost in which a time required for switching a winding is shortened and the number of semiconductor switch units is decreased as much as possible. In a windin... | 01/25/2005 |
| 6831250 | Method for calculating shape of bead of welded part A method for calculating the shape of a bead of a welded part by solving the problem of multiple solutions when the shape causing a recess or undercut in the flange is determined by calculation. The geometry data on the object to be welded, the characteristic parame... | 12/14/2004 |
| 6831379 | Permanent magnet synchronous linear motor A permanent magnet synchronous linear motor comprising a field yoke (1) having a plurality of permanent magnets (2) the polarity of which is alternated and which are arranged linearly and an armature (3) facing the array of the permanent magnets... | 12/14/2004 |
| 6825631 | Prediction controlling device A controlling device of high follow-up accuracy is provided, the prediction accuracy of which is not degraded by an FF signal when the controlled object is feedforward-controlled. The prediction controlling device 1 has a feedforward signal generation command... | 11/30/2004 |
| 6801830 | Operation confirming method and device for industrial machinery An operation confirming method capable of making, in order to enhance an operation program correction efficiency, an operation path at an operation confirming time (teaching mode) identical with that at an actual job time (play mode) as much as possible; and a contr... | 10/05/2004 |
| 6765360 | Dynamic optimizing method for speed data and positioning device using this method A dynamic optimization method for speed data, for compensating for a speed data maximum value and a minimum resolution that can be specified by users without depending on a speed pattern preparation cycle. A dynamic optimizing method for speed data used for preparin... | 07/20/2004 |
| 6750445 | Encoder A slit structure of an encoder for preventing the position precision at high speed operation from deteriorating. An encoder for measuring the rotational speed and rotational position of a rotary slit disc (1) by a light receiving device (4) for receivi... | 06/15/2004 |
| 6750428 | Automatic welding device and welding skill training device A technique for judging a welding quality for acceptance or rejection and displaying the result in diagrams, and an automatic welding device incorporating the technique therein. When an operation result record status judging means judges that past operation records ... | 06/15/2004 |
| 6731029 | Canned linear motor A canned linear motor such that increase of the temperature of the mover is suppressed, the viscous damping force is reduced, and the strength of the can does not deteriorate. A canned linear motor comprises two parts, in one of which a permanent magnet is provided ... | 05/04/2004 |
| 6709720 | Marking method and marking material A method of marking materials, wherein the surface of a marking material and the surface of a material to be marked are matched, a laser beam is applied to the marking material while scanning the beam to form a mark, the material to be marked consisting a transparen... | 03/23/2004 |
| 6701803 | Reduction gears-integrated actuator A reduction gears-integrated actuator provided with harmonic reduction gears 14, a motor 7 and a rotation position detector 26, wherein a rotor 11 comprises a cup-shaped rotary yolk 12, a permanent magnet 13 is fixed to the outer periphery of the rotary y... | 03/09/2004 |
| 6684128 | Robot and method of controlling the robot A robot capable of being operated at a high-speed by the full use of a power of a servo-motor, including a motor and a speed reducer, wherein the motor drives the robot through the speed reducer, and the speed reducer is a variable speed reducer capable o... | 01/27/2004 |
| 6653806 | Dynamic brake circuit and semiconductor inverter using dynamic brake circuit The invention prevents the voltage change dv/dt occurring at an inverter from directly igniting a semiconductor braking switch and short-circuiting the inverter during operation. In a dynamic brake circuit which absorbs energy by brake resistor 15 upon ig... | 11/25/2003 |
| 6648764 | Leaf spring type coupling and motor device using the coupling A leaf spring type coupling is described which is provided with a first leaf spring 9 and a second leaf spring 10 that absorb a deviation in the axial center of a first rotating axis and a second rotating axis via an intermediate member 8 provided between... | 11/18/2003 |
| 6642483 | High-speed CO2 gas welding method A welding voltage is determined based on an expression, P=k2×Vw2 +k3×Vw, where, with a welding wire feed speed and a welding wire radius used as inputs, a power factor is P(kW), the a melting speed of a welding wire is Vw(g/sec), and k2 and k... | 11/04/2003 |
| 6628038 | Resolver using sheet coil A disklike rotor is placed with air gaps between disklike stators. The disklike rotor has a sheet coil attached to its sides, on which are formed the secondary coil pattern of a rotary transformer and a resolver excitation phase pattern. A sheet coil havi... | 09/30/2003 |
| 6566837 | Position controller for motor A position controller for motors for increasing the position loop gain of a full-close control system without causing recurrence of vibration. The controller where a position signal representing the position of a movable table and outputted from straight-... | 05/20/2003 |
| 6554144 | Boom positioning device for high-position working A boom positioning device for high-position working, capable of ensuring a desired positional accuracy even in positioning a work location at the tip end of a boom from a distant place, the device comprising an imaging means (4) having a multi-axis drivin... | 04/29/2003 |
| 6519507 | Method of teaching robot with traveling axis off-line A method of teaching a robot off-line having a traveling axis, by which the final position and final posture are determined when a robot having a traveling axis stops at an arbitrary position on a traveling axis. The method is able to take an arbitrary po... | 02/11/2003 |
| 6515442 | Position controller To overcome the problem of a low frequency disturbance causing minute vibrations affecting response attributable to the difficulty of adaption to the phase of the vibrations, the present invention provides a position controller, which includes a subtracte... | 02/04/2003 |
| 6504146 | Disk-mounting structure for optical encoder An optical encoder is provided in which a disk is prevented from eccentric rotation. An optical encoder comprises a shaft (2) supported on a bearing (3) in a housing (1), a rotating disk (4) having a code pattern and fixed to the shaft (2), a photodetecto... | 01/07/2003 |
| 6476524 | Linear motor A moving-coil linear motor free of cogging. The motor has a rotor (3) including separated block cores (31, 32 and 33), each of which has a length equivalent to eight times the magnet pitch (Pm) and includes nine teeth (4) along the length. The block cores... | 11/05/2002 |
| 6407471 | Linear motor The invention relates to a linear motor which is provided with a row of permanent magnets 6a, 6b, 6c, . . . for a field system, and an armature 2 facing the same via a magnetized space in an orthogonal direction thereto, wherein the armature core 3 has a ... | 06/18/2002 |
| 6356074 | Magnetoresistive detector with multiple bias magnets for biasing its magnetoresistive elements The magnetoresistive detector of the present invention uses magnetoresistive elements for detecting changes in the magnetic field of a moving magnet 3 which changes a magnetic field, wherein bias magnets (21, 22, 23, 24) can be mounted without using posit... | 03/12/2002 |
| 6350984 | Optical encoder An optical encoder that accurately performs rotation while protecting a rotating disk from dust. The optical encoder comprises a shaft (5) supported by a bearing (6) in a housing (1), a rotating disk (8) fixed to the shaft (5), a light-emitting element (1... | 02/26/2002 |
| 6295484 | Robot control method and device When a multiaxial robot with a mechanism having spring elements between electric motors of respective axes and robot arms is controlled, the path precision of a tool tip is increased without causing vibrations produced by mechanical interference between a... | 09/25/2001 |
| 6285152 | Industrial robot The present invention is an industrial robot which has a feed screw that can be easily position in relation to the direct-acting guide. It has a power transmission device that can be removed from the supporting frame which the feed screw is left attached ... | 09/04/2001 |
| 6271500 | Arc welding monitoring device The invention provides an arc welding monitoring device by which it is possible to easily find how detected data such as a welding current and welding voltage correspond to trajectories of a robot, in other words, welding line information of a welding wor... | 08/07/2001 |
| 6252369 | Motor speed controller and gain setting method of the controller A motor speed controller with high speed response characteristics. The controller comprises a proportional operating means, a means (1) which controls the angular velocity of a motor, an equivalent rigid body model (21) modelled in a primary delay system ... | 06/26/2001 |
| 6242885 | Method for estimating induced electromotive force and speed of induction motor, method for correcting misalignment of shaft thereof, and induction motor controller A three-phase-to-two-phase converter detects two-phase currents of three-phase stator currents, converts the stator currents into a γ-δ coordinate system to derive a γ-axis current and a δ-axis current. The γ-axis current, the δ-axis current, a... | 06/05/2001 |
| 6226192 | Three-level neutral point clamping type inverter circuit In a three-level neutral point clamping type inverter circuit which includes a positive bus line (4), a negative bus line (5) and a neutral line (6), wherein first and second IGBTs (11), (12) are connected in series between the positive bus line (4) and a... | 05/01/2001 |
| 6215270 | Synchronous control device There is provided a synchronous control apparatus of high synchronous control accuracy, and the synchronous control accuracy is seldom deteriorated even if input of the position command and detection of the main shaft position are delayed. The synchronous... | 04/10/2001 |
| 6212443 | Teaching unit for robots A direct teaching apparatus which allows an operator to perform the direct teaching of a robot in safety. The apparatus includes a force detector and a teaching tool. The tool includes a working tool or handle fixed to the first detector and held by the o... | 04/03/2001 |
| 6207927 | Gas-shielded AC arc welding method and machine making use of consumable electrode An EP output voltage to be outputted during a period of EP polarity is set so that a welding current becomes equal to or lower than a critical current level, and an EN output voltage to be outputted during a period of EN polarity is set at a level lower t... | 03/27/2001 |
