Controller For Permanent Magnet Synchronous Motor and Motor Control System
First Claim
1. A controller for controlling a power converter to be connected to a permanent magnet synchronous motor, comprising:
- a current detector configured to detect a current flowing through the permanent magnet synchronous motor;
a vector controller configured to, on the basis the detected current, generate a control signal for controlling the power converter;
an axial error estimation computing unit configured to estimate an axial error information which is a difference between a phase estimation value obtained by integrating a rotational speed estimation value of the permanent magnet synchronous motor and a phase value of the permanent magnet synchronous motor and generate a q-axis voltage component value on the basis of voltage command signals and the detected current;
a rotational speed estimation value computing unit configured to perform control so that the axial error information estimated by the axial error estimation computing unit is identical with an axial error information command; and
a motor constant identification computing unit configured to identify a motor constant of the permanent magnet synchronous motor with the q-axis voltage component value and either of the rotational speed estimation value of the permanent magnet synchronous motor or a rotational speed command and reflect the identified motor constant in controlling the power converter by the vector controller.
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Accused Products
Abstract
A motor control system includes a power converter, a vector controller for controlling the power converter, an axial error estimating operation for estimating an axial error which is a deviation between the phase estimation value and phase value of the motor, and a rotational speed estimating computing unit 5 for performing control so as to equalize the estimation value to a command of the axial error, a motor constant identification computing unit. The motor constant identification computing unit identifies a motor constant with a q-axis voltage component and a rotational speed identified value or a rotational speed command to reflect the identified motor constant in the vector controller.
14 Citations
7 Claims
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1. A controller for controlling a power converter to be connected to a permanent magnet synchronous motor, comprising:
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a current detector configured to detect a current flowing through the permanent magnet synchronous motor; a vector controller configured to, on the basis the detected current, generate a control signal for controlling the power converter; an axial error estimation computing unit configured to estimate an axial error information which is a difference between a phase estimation value obtained by integrating a rotational speed estimation value of the permanent magnet synchronous motor and a phase value of the permanent magnet synchronous motor and generate a q-axis voltage component value on the basis of voltage command signals and the detected current; a rotational speed estimation value computing unit configured to perform control so that the axial error information estimated by the axial error estimation computing unit is identical with an axial error information command; and a motor constant identification computing unit configured to identify a motor constant of the permanent magnet synchronous motor with the q-axis voltage component value and either of the rotational speed estimation value of the permanent magnet synchronous motor or a rotational speed command and reflect the identified motor constant in controlling the power converter by the vector controller. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A motor control system comprising:
- a permanent magnet synchronous motor;
a power converter connected to the motor, a current detector configured to detect a current flowing through the permanent magnet synchronous motor, a controller generating a control signal for controlling the power converter;
the controller comprising;a vector controller configured to generate the control signal on the basis of the detected current; an axial error estimating computing unit configured to estimate an axial error information which is a difference between a phase value of the motor and the phase estimation value obtained by integrating a rotational speed estimation value of the motor and generate a q-axis voltage component; a rotational speed estimating computing unit for performing control so as to equalize the estimation value operated by the axial error estimating computing unit to a command of the axial error information, and a motor constant identification computing unit configured to identify a motor constant of the permanent magnet synchronous motor with the q-axis voltage component and the rotational estimation value or a rotational speed command and reflects the identified motor constant in generating the control signal by the vector controller.
- a permanent magnet synchronous motor;
Specification