Optimal operation pattern selection method for motor, optimal operation pattern selection program for motor, and motor selection device

Patent metadata

Field	Value
Publication number	US-10102314-B2
Application number	US-201314896834-A
Country	US
Kind code	B2
Filing date	Dec 19, 2013
Priority date	Jun 19, 2013
Publication date	Oct 16, 2018
Grant date	Oct 16, 2018

Abstract

In an optimal operation pattern selection method, a plurality of selectable motors is selected and an optimal operation pattern from among the motor operation pattern defined by positioning time to rotate a motor output shaft of the motor to rotate a load by a positioning angle and stop time to stop the motor output shaft is suggested. The optimal operation pattern selection method includes a comprehensive determination step of calculating a comprehensive determination result according to an adaptable item, and storing the comprehensive determination result linked to each of the motors; and a list display step of displaying a list of the motors to enable to receive selection of one of the motors, together with the comprehensive determination result stored in the comprehensive determination step.

First claim

The invention claimed is:

1. An optimal operation pattern selection method for a motor, in which a plurality of selectable motors is selected and an optimal operation pattern is suggested from among motor operation patterns defined by positioning time to rotate a motor output shaft of the motor to rotate a load by a positioning angle and stop time to stop the motor output shaft, the method comprising:
a simulation conditions input step of acquiring information of the simulation conditions including an input value of the positioning angle and an input value of inertia moment of the load as operating conditions, and at least one of an input value of required positioning time and an input value of required stop time as required conditions;
a simulation step including
calculating a total value of inertia moment by adding rotor inertia moment of a mechanical elements data information with the input value of the inertia moment of the load, for each of the selectable motors; and
acquiring shortest positioning time to rotate the load by the input value of the positioning angle based on the total value of the inertia moment and torque characteristic information according to a rotational angular speed or a rotational speed included in the mechanical elements data information, and
simulating an operation pattern under the simulation conditions for each of stored motors by simulating an operation pattern including the shortest positioning time for each of the motors;

a comparison step including:
obtaining an adaptability determination result of an item in the required conditions by comparing the shortest positioning time of the operation pattern for each of the motors obtained in the simulation step with the input value of the required positioning time under the required conditions,
obtaining an adaptability determination result of an item in the operating conditions by comparing at least the input value of the inertia moment of the load included in the operation conditions with a predetermined threshold value, and
among items of a plurality of determination results including at least the adaptability determination result of the item in the required conditions and the adaptability determination result of the item in the operating conditions, identifying and storing items having an adaptable determination result as adaptable items; and
a comprehensive determination step of calculating a comprehensive determination results that varies according to combination of adaptable items obtained in the comparison step, and storing the comprehensive determination results linked to each of the motors; and
a list display step of displaying, together with the comprehensive determination result stored in the comprehensive determination step, a list of the motors that enables to select of one of the motors; and

selecting one of the motors from the list of the motors from the comprehensive determination results.

2. The optimal operation pattern selection method for a motor according to claim 1 , wherein in a case where a first item in the operation conditions is adaptable and second item in the required conditions is unadaptable, providing a determination result of partially adaptable as the comprehensive determination results in the comprehensive determination step,
wherein being adaptable indicates that the first item satisfies a plurality of first conditions,
wherein being unadaptable indicates that the second item does not satisfy a plurality of second conditions, and
wherein being partially adaptable indicates a combination of the first item, satisfying the plurality of first conditions, and the second item, which does not satisfy the plurality of second conditions.

3. The optimal operation pattern selection method for a motor according to claim 2 , wherein the determination result indicating partially adaptable is displayed on the list of the motors in the list display step.

4. The optimal operation pattern selection method according to claim 1 , wherein the simulation step is executed under the condition that the input value of the positioning angle, the input value of the inertia moment of the load, and the input value of the required positioning time or the input value of the required stop time are input in the simulation conditions input step.

5. The optimal operation pattern selection method for a motor according to claim 1 , wherein in a case where the torque characteristic information according to a rotational angular speed or a rotational speed of a stored motor has constant output torque when rotation of the motor output shaft is varied from zero to a maximum rotational angular speed or a maximum rotational speed, an operation pattern is simulated such that rotation by the positioning angle is performed by rotation of the motor output shaft during acceleration time in which rotation of the motor output shaft is accelerated and during deceleration time in which rotation of the motor output shaft is decelerated.

6. The optimal operation pattern selection method according to claim 1 , wherein in a case where the torque characteristic information according to a rotational angular speed or a rotational speed of a stored motor has a break point which is a change point where output torque is reduced while rotation of the motor output shaft changes from zero to a maximum rotational angular speed or while rotation of the motor output shaft changes from zero to a maximum rotational speed, an operation pattern is simulated in a first area where a rotational angular speed or a rotational speed changes to the break point such that rotation by the positioning angle is performed by rotation of the motor output shaft during the acceleration time in which rotation of the motor output shaft is accelerated and deceleration time in which rotation of the motor output shaft is decelerated.

7. The optimal operation pattern selection method for a motor according to claim 6 , wherein simulation is executed in a second area where rotational angular speed is varied from the break point to the maximum rotational angular speed or the maximum rotational speed such that rotation by the positioning angle is performed by rotation of the motor output shaft during the acceleration time in which rotation of the motor output shaft is accelerated, constant speed time in which rotation of the motor output shaft is rotated at a constant speed, and the deceleration time in which rotation of the motor output shaft is decelerated.

8. The optimal operation pattern selection method for a motor according to claim 7 , wherein positioning time to rotate the motor output shaft in the second area is shortest positioning time among positioning time calculated for each of sections obtained by dividing the second area into a plurality of the sections.

9. A motor selection device to select a plurality of selectable motors and suggest an optimal operation pattern from among motor operation patterns defined by positioning time to rotate a motor output shaft of the motor to rotate a load by a positioning angle and stop time to stop the motor output shaft, the motor selection device comprising:
a memory storing instructions; and
at least one hardware processor configured to execute the instructions to implement:
an input access unit to receive input of information of the simulation conditions including an input value of the positioning angle and an input value of inertia moment of the load as operating conditions, and at least one of an input value of required positioning time and an input value of required stop time as required conditions;
a storage device to store a mechanical elements data information for each of the selectable motors;
a calculation unit to perform
calculating a total value of ine

Assignees

• Nsk Ltd

Inventors

• Miura Shota
• Maruyama Masayuki

Classifications

• H02P23/0004 Primary

  Control strategies in general, e.g. linear type, e.g. P, PI, PID, using robust control · CPC title

• G06F30/20 Primary

  Design optimisation, verification or simulation (optimisation, verification or simulation of circuit designs G06F30/30) · CPC title

• G05B19/19

  characterised by positioning or contouring control systems, e.g. to control position from one programmed point to another or to control movement along a programmed continuous path · CPC title

• G06F17/10

  Complex mathematical operations {(function generation by table look-up G06F1/03; evaluation of elementary functions by calculation G06F7/544)} · CPC title

• H02P29/00

  Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors (arrangements for starting electric motors H02P1/00; arrangements for stopping or slowing electric motors H02P3/00; control of motors that can be connected to two or more different electric power supplies H02P4/00; regulating or controlling the speed or torque of two or more electric motors H02P5/00; vector control H02P21/00) · CPC title