Patent application number | Description | Published |
20080245121 | Device for judging collision of a die cushion mechanism and system for judging collision | 10-09-2008 |
20080258671 | CONTROL DEVICE HAVING EXCESSIVE-ERROR DETECTION FUNCTION - Abnormality of a position error is quickly detected in a control device in which feedforward control is introduced. A position error estimation processing unit calculates a position error estimation value Err, for example, from the equation V/PG×(1−α) (V: first order differential of position command, PG: position gain in position controller, α: feedforward coefficient in feedforward term calculating unit), and abnormality of the position error is detected using an excessive-error detection level calculating by adding a margin ΔE to the position error estimation value. | 10-23-2008 |
20090174349 | MOTOR DRIVE APPARATUS EQUIPPED WITH DYNAMIC BRAKING CIRCUIT FAULT DETECTION CAPABILITY - A motor drive apparatus | 07-09-2009 |
20090174357 | SERVO MOTOR CONTROLLER - A servo motor controller having: a frequency identification section that performs analysis based on a frequency response method and identifies the frequency of a disturbance exhibiting a specified phase lag; an input/output gain identification section that identifies the input/output gain at the frequency identified by the frequency identification section; and a magnification factor resetting section that resets an adjustment magnification factor by performing a specified operation on a ratio between the identified input/output gain and a specified target value of the input/output gain. | 07-09-2009 |
20100072940 | SERVO MOTOR DRIVE CONTROL DEVICE FOR CALCULATING CONSUMED ELECTRIC ENERGY AND REGENERATED ELECTRIC ENERGY - A mechanical system includes a plurality of amplifier groups each having a common power source unit connected to a higher-level power source and a plurality of power supply units for supplying power to servo motors from the common power source unit. A servo motor drive control device of the mechanical system includes a plurality of amplifier group electric power detection units each determining an electric energy of the corresponding one of the amplifier groups. Each of the amplifier group electric power detection units totals individual periodic electric energy dEak of the servo motors connected to the power supply unit associated with the corresponding amplifier group thereby to determine an amplifier group periodic electric energy dEbg representing a consumed electric energy or a regenerated electric energy in the corresponding amplifier group and integrates the determined amplifier group periodic electric energy dEbg over a predetermined time length thereby to determine an amplifier group consumed electric energy Ebng. The individual periodic electric energy dEak takes a positive value when electric power is consumed by the servo motors, and takes a negative value when electric power is regenerated by the servo motor. | 03-25-2010 |
20100117568 | CONTROLLER FOR CALCULATING ELECTRIC POWER CONSUMPTION OF INDUSTRIAL MACHINE - A controller of an industrial machine provided with an electric motor, a peripheral apparatus and an amplifier for the motor. The controller includes a motor power-consumption calculation section calculating motor power consumption by multiplying a motor current detection value, a motor rotation-speed detection value and a predetermined motor torque constant together; a power loss calculation section calculating sum power loss of the motor and amplifier by adding motor power loss determined by multiplying a square of the motor current detection value by a predetermined motor winding-resistance value, amplifier power loss determined by multiplying the motor current detection value by a predetermined amplifier power-loss coefficient, and predetermined fixed amplifier power consumption together; a fixed power-consumption calculation section calculating fixed power consumption of the peripheral apparatus; and a total power-consumption calculation section determining total power consumption of the industrial machine in a predetermined time period by integrating, for the time period, the calculated motor power consumption, the calculated sum power loss and the calculated fixed power consumption. | 05-13-2010 |
20100207566 | CONTROL DEVICE FOR SERVO DIE CUSHION - A control device, for a servo die cushion, capable of improving a response after overshoot generated by collision of a slide and a die cushion. The control device has a local maximum point judging part which judges a local maximum point based on the detected speed of the servomotor; a speed correction value calculating part which calculates a speed correction value for the servomotor based on the judgment result and the detected speed of the slide; a second force commanding part which generates a second force command value, the second force command value decreasing from an initial value to a first force command value, the initial value being equal to the force detected value when reaching generally the local maximum point. The force command value is switched from the first force command value to the second force command value, when the force detected value reaches the local maximum point. | 08-19-2010 |
20110015877 | TOOL PATH DISPLAY APPARATUS FOR MACHINE TOOL - First and second screens are set for a tool path display apparatus for displaying a path of the tip of a tool attached to a machine tool. The first screen displays the three-dimensional path of the tip of the tool obtained by synthesizing the position information of the drive axes of a 5-axis machine tool. The second screen displays the waveforms of the position deviations and current instructions of the drive axes in chronological order. When a part (line segment) of the three-dimensional path of the tip of the tool is selected on the first screen, the display attribute of the corresponding time area is changed on the second screen so that the time area can be identified. | 01-20-2011 |
20120299232 | OSCILLATION CONTROLLER FOR AN OSCILLATING BODY CAPABLE OF ADJUSTING ACCELERATION THEREOF - In oscillating an oscillating body, a control unit obtains a load torque due to the gravity acting on a drive motor at least at one angular position defined about an axis of rotation. The control unit calculates a specified maximum acceleration depending upon if the load torque Q is acting in a direction in which it hinders the acceleration or deceleration of the drive motor | 11-29-2012 |
20130009576 | MOTOR CONTROLLER HAVING ENERGY STORAGE UNIT - A motor controller includes: a converter circuit for converting AC power to DC power; an inverter circuit connected to a DC side of the converter circuit and converting DC power to AC power for driving a motor or converting AC power regenerated from the motor to DC power; an energy storage unit connected to the DC side of the converter circuit and the inverter circuit and storing or outputting DC power; and a control unit controlling amount of DC power to be stored or output in/from the energy storage unit on the basis of a motor operation instruction instructing operation of the motor. | 01-10-2013 |