Motor control device and motor control method

Patent metadata

Field	Value
Publication number	US-11205983-B2
Application number	US-202016930331-A
Country	US
Kind code	B2
Filing date	Jul 16, 2020
Priority date	Jul 24, 2019
Publication date	Dec 21, 2021
Grant date	Dec 21, 2021

Abstract

A motor control device includes a first storage configured to store indicated values of control parameters, motor control circuitry configured to control a motor based on the indicated values stored in the first storage, primary setting circuitry configured to set in the first storage at least one indicated value among the indicated values as a primary indicated value which corresponds to specific parameter among the control parameters, secondary setting circuitry configured to replace, based on a change instruction input via a terminal, the primary indicated value stored in the first storage with a secondary indicated value in accordance with the change instruction, and resetting circuitry configured to replace the secondary indicated value stored in the first storage with the primary indicated value when a return requirement is satisfied after the secondary setting circuitry has replaced the primary indicated value with the secondary indicated value.

First claim

What is claimed is:

1. A motor control device comprising:
a first storage configured to store indicated values of control parameters;
motor control circuitry configured to control a motor based on the indicated values stored in the first storage;
primary setting circuitry configured to set in the first storage at least one indicated value among the indicated values as a primary indicated value which corresponds to specific parameter among the control parameters;
secondary setting circuitry configured to replace, based on a change instruction input via a terminal, the primary indicated value stored in the first storage with a secondary indicated value in accordance with the change instruction; and
resetting circuitry configured to replace the secondary indicated value stored in the first storage with the primary indicated value when a return requirement is satisfied after the secondary setting circuitry has replaced the primary indicated value with the secondary indicated value.

2. The motor control device according to claim 1 , wherein
the first storage comprises
a first area to which the motor control circuitry refers in order to control the motor, and
a second area disposed separately from the first area,

the primary setting circuitry is configured to set the primary indicated value in the first area,
the secondary setting circuitry is configured to set in the second area the primary indicated value read from the first area, and is configured to set the secondary indicated value in the first area based on the change instruction input through the terminal, and
the resetting circuitry is configured to reset in the first area the primary indicated value read from the second area when the return requirement is satisfied.

3. The motor control device according to claim 1 , wherein
the primary setting circuitry is configured to set in the first storage the primary indicated value representing a sum of a first value and a second value, the first value being a fixed value portion fixedly taking the first value, the second value being a variable value portion variable with an initial value defined as the second value,
the secondary setting circuitry is configured to set in the first storage the secondary indicated value representing a sum of the first value of the fixed value portion and a predetermined decrease start value that is substituted into the variable value portion and is larger than the second value, based on the change instruction input via the terminal, and
the resetting circuitry is configured to reset in the first storage the primary indicated value representing a sum of the first value of the fixed value portion and the second value to be given, when the return requirement is satisfied, from the variable value portion decreasing from the decrease start value.

4. The motor control device according to claim 1 , further comprising:
a second storage configured to store an initial value of the specific parameter,
wherein
the primary setting circuitry is configured to read the initial value from the second storage, set the initial value in the first storage, and set the primary indicated value in the first storage in which the initial value is set in order to overwrite and update the value stored in the first storage at a timing when electric power is supplied to the primary setting circuitry.

5. The motor control device according to claim 4 , wherein
when an instruction of changing the specific parameter is input via the terminal while selecting a mode of continuously changing the specific parameter, the secondary setting circuitry and the resetting circuitry are not activated, the primary setting circuitry further rewrites the value of the specific parameter stored in the second storage, based on the instruction.

6. The motor control device according to claim 1 , wherein
the terminal includes a display configured to display a setting state of the motor control device,
the resetting circuitry is configured to transmit, during a period in which the return requirement is not satisfied, a signal indicating that the return requirement is not satisfied, to the terminal, and
the display is configured to display information indicating that the return requirement is not satisfied, based on the signal.

7. The motor control device according to claim 1 , wherein
the resetting circuitry is configured to reset the primary indicated value in the first storage on condition that a predetermined time has elapsed after the secondary setting circuitry sets the secondary indicated value or on condition that power is turned on again, as the return requirement.

8. A motor control method comprising:
storing indicated values of control parameters;
controlling a motor based on the indicated values stored in the first storage;
setting in the first storage at least one indicated value among the indicated values as a primary indicated value which corresponds to specific parameter among the control parameters;
replacing, based on a change instruction input via a terminal, the primary indicated value stored in the first storage with a secondary indicated value in accordance with the change instruction; and
replacing the secondary indicated value stored in the first storage with the primary indicated value when a return requirement is satisfied after the secondary setting circuitry has replaced the primary indicated value with the secondary indicated value.

Assignees

• Yaskawa Electric Corp

Inventors

• Nitta Koichi
• Sato Mitsunori
• Imayoshi Hiroyuki
• Matsushita Tadanori

Classifications

• H02P27/06

  using DC to AC converters or inverters (H02P27/05 takes precedence) · CPC title

• H02P2205/01

  Current loop, i.e. comparison of the motor current with a current reference · CPC title

• H02P23/14 Primary

  Estimation or adaptation of motor parameters, e.g. rotor time constant, flux, speed, current or voltage · CPC title

• H02P23/0004

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