Electric motor control device
AssigneeSeiko Epson Corporation
InventorIsamu SEJIMO
Life of this patent
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Abstract
An electric motor control device includes a control section adapted to control supply of a drive current to an electric motor, and a rotational speed detection section adapted to detect a rotational speed of the electric motor, the drive current includes a d-axis current and a q-axis current, and the control section calculates a q-axis current command value based on a torque command value to the electric motor, calculates a d-axis current command value using a difference between the rotational speed of the electric motor and a previously determined base rotational speed of the electric motor, and the q-axis current command value, and performs vector control on the electric motor using the d-axis current command value and the q-axis current command value.
Claims7
An electric motor control device comprising:
- a control section adapted to control supply of a drive current to an electric motor;
- and
- a rotational speed detection section adapted to detect a rotational speed of the electric motor,
- wherein the drive current includes a d-axis current and a q-axis current, and
- the control section
- calculates a q-axis current command value based on a torque command value to the electric motor,
- calculates a d-axis current command value using a difference between the rotational speed of the electric motor and a previously determined base rotational speed of the electric motor, and the q-axis current command value, and
- performs vector control on the electric motor using the d-axis current command value and the q-axis current command value.
An electric motor control device comprising:
- a control section adapted to control supply of a drive current to an electric motor;
- and
- a rotational speed detection section adapted to detect a rotational speed of the electric motor,
- wherein the drive current includes a d-axis current and a q-axis current, and
- the control section
- calculates a q-axis current command value as a predetermined value of the q-axis current based on a torque command value to the electric motor,
- calculates a d-axis current command value as a predetermined value of the d-axis current using a difference between the rotational speed of the electric motor and a base rotational speed of the electric motor, and the q-axis current command value, and
- performs vector control on the electric motor using the d-axis current command value and the q-axis current command value.
Dependencies are inferred from the claim text.