Motor abnormality detection apparatus and electric power steering control system
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorMasaki Matsushita
Life of this patent
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Abstract
A motor abnormality detection apparatus is capable of performing the abnormality detection of a motor (5) without supplying a special electric current thereto for abnormality detection in an ordinary control state. A motor control device (100) controls the motor (5) through vector control which is described by a two-phase rotating magnetic flux coordinate system having the direction of a field current as a d-axis direction and a direction orthogonal to the d-axis direction as a q-axis direction. A motor abnormality detection part (100h) (100h) performs an abnormality determination of the motor based on target impression voltages (Vd*, Vq*) impressed on the motor (5).
Claims41
A motor abnormality detection apparatus in which a motor is controlled through vector control which is described by a two-phase rotating magnetic flux coordinate system having the direction of a field current as a d-axis direction and a direction orthogonal to the d-axis direction as a q-axis direction, said apparatus comprising a motor abnormality detection part for making a determination of abnormality in said motor based on target impression voltages impressed on said motor, wherein said motor abnormality detection part performs an abnormality detection of said motor based on a sum of squares of a d-axis target voltage and a q-axis target voltage of the target impression voltages impressed on said motor.
A motor abnormality detection apparatus in which a motor is controlled through vector control which is described by a two-phase rotating magnetic flux coordinate system having the direction of a field current as a d-axis direction and a direction orthogonal to the d-axis direction as a q-axis direction, said apparatus comprising an abnormality detection part for making a determination of abnormality in said motor based on target impression voltages impressed on said motor,
- wherein said motor abnormality detection part makes the abnormality determination of said motor based on a d-axis target voltage of said target impression voltages impressed on said motor, and
- wherein said motor abnormality detection part determines that said motor is abnormal when said d-axis target voltage is outside a predetermined range that is set beforehand.
A motor abnormality detection apparatus in which a motor is controlled through vector control which is described by a two-phase rotating magnetic flux coordinate system having the direction of a field current as a d-axis direction and a direction orthogonal to the d-axis direction as a q-axis direction, said apparatus comprising an abnormality detection part for making a determination of abnormality in said motor based on target impression voltages impressed on said motor,
- wherein said motor abnormality detection part makes the abnormality determination of said motor based on a d-axis target voltage of said target impression voltages impressed on said motor, and
- wherein said motor abnormality detection part determines that said motor is abnormal when said d-axis target voltage is saturated.
A motor abnormality detection apparatus in which a motor is controlled through vector control which is described by a two-phase rotating magnetic flux coordinate system having the direction of a field current as a d-axis direction and a direction orthogonal to the d-axis direction as a q-axis direction, said apparatus comprising an abnormality detection part for making a determination of abnormality in said motor based on target impression voltages impressed on said motor,
- wherein said motor abnormality detection part makes the abnormality determination of said motor based on a d-axis target voltage of said target impression voltages impressed on said motor, and
- wherein said motor abnormality detection part determines that said motor is abnormal when a deviation between said d-axis target voltage and a d-axis armature voltage which is shown by the following expression is greater than a prescribed value:
- Vd=R·Id−ωe·Lq·Iq
- where R represents an armature resistance;
- Id represents a d-axis armature current;
- ωe represents an electrical angular velocity;
- Lq represents a q-axis inductance;
- and Iq represents a q-axis armature current.
A motor abnormality detection apparatus in which a motor is controlled through vector control which is described by a two-phase rotating magnetic flux coordinate system having the direction of a field current as a d-axis direction and a direction orthogonal to the d-axis direction as a q-axis direction, said apparatus comprising an abnormality detection part for making a determination of abnormality in said motor based on target impression voltages impressed on said motor,
- wherein said motor abnormality detection part performs the abnormality determination of said motor based on a q-axis target voltage of said target impression voltages impressed on said motor, and
- wherein said motor abnormality detection part determines that said motor is abnormal when said q-axis target voltage is outside a predetermined range that is set beforehand.
A motor abnormality detection apparatus in which a motor is controlled through vector control which is described by a two-phase rotating magnetic flux coordinate system having the direction of a field current as a d-axis direction and a direction orthogonal to the d-axis direction as a q-axis direction, said apparatus comprising an abnormality detection part for making a determination of abnormality in said motor based on target impression voltages impressed on said motor,
- wherein said motor abnormality detection part performs the abnormality determination of said motor based on a q-axis target voltage of said target impression voltages impressed on said motor, and
- wherein said motor abnormality detection part determines that said motor is abnormal when said q-axis target voltage is saturated.
A motor abnormality detection apparatus in which a motor is controlled through vector control which is described by a two-phase rotating magnetic flux coordinate system having the direction of a field current as a d-axis direction and a direction orthogonal to the d-axis direction as a q-axis direction, said apparatus comprising an abnormality detection part for making a determination of abnormality in said motor based on target impression voltages impressed on said motor,
- wherein said motor abnormality detection part performs the abnormality determination of said motor based on a q-axis target voltage of said target impression voltages impressed on said motor, and
- wherein said motor abnormality detection part determines that said motor is abnormal when a deviation between said q-axis target voltage and a q-axis armature voltage Vq which is shown by the following expression is greater than a prescribed value:
- Vq=ωe·Ld·Id+R·Iq+ωe·Φa
- where ωe represents an electrical angular velocity;
- Ld represents a d-axis inductance;
- Id represents a d-axis armature current;
- R represents an armature resistance;
- Iq represents a q-axis armature current;
- Φa represents √(3/2)·Φ′a;
- and Φ′a represents an armature winding interlinkage magnetic flux maximum value.
A motor abnormality detection apparatus in which a motor is controlled through vector control which is described by a two-phase rotating magnetic flux coordinate system having the direction of a field current as a d-axis direction and a direction orthogonal to the d-axis direction as a q-axis direction, said apparatus comprising an abnormality detection part for making a determination of abnormality in said motor based on target impression voltages impressed on said motor, and means for detecting an annular velocity of said motor,
- wherein said motor abnormality detection part performs the abnormality determination of said motor only when the angular velocity of said motor is below a predetermined number of revolutions per minute, and
- wherein said motor abnormality detection part uses a steering angular velocity in place of the angular velocity of said motor.
A motor abnormality detection apparatus, comprising:
- an output circuit that applies target voltages to a motor;
- and
- a control circuit that detects an abnormality of the motor based on at least a target voltage,
- wherein the motor is controlled via vector control defined in a coordinate system in which a field current corresponds to a d-axis direction and a q-axis direction is orthogonal to the d-axis direction,
- wherein the at least a target voltage comprises a d-axis target voltage and a q-axis target voltage,
- wherein the d-axis target voltage is a component of the at least the target voltage in the d-axis direction,
- wherein the q-axis target voltage is a component of the at least the target voltage in the q-axis direction, and
- wherein the control circuit detects the abnormality based on a sum of squares of a d-axis target voltage and a q-axis target voltage.
A motor abnormality detection apparatus, comprising:
- an output circuit that applies target voltages to a motor;
- and
- a control circuit that detects an abnormality of the motor based on at least a target voltage,
- wherein the motor is controlled via vector control defined in a coordinate system in which a field current corresponds to a d-axis direction and a q-axis direction is orthogonal to the d-axis direction,
- wherein the at least a target voltage comprises a d-axis target voltage, which is a component of the at least the target voltage in the d-axis direction,
- wherein the control circuit detects the abnormality based on the d-axis target voltage, and
- wherein the control circuit detects the abnormality when the d-axis target voltage is outside a predetermined range.
A motor abnormality detection apparatus, comprising:
- an output circuit that applies target voltages to a motor;
- and
- a control circuit that detects an abnormality of the motor based on at least a target voltage,
- wherein the motor is controlled via vector control defined in a coordinate system in which a field current corresponds to a d-axis direction and a q-axis direction is orthogonal to the d-axis direction,
- wherein the at least a target voltage comprises a d-axis target voltage, which is a component of the at least the target voltage in the d-axis direction,
- wherein the control circuit detects the abnormality based on the d-axis target voltage, and
- wherein the control circuit detects the abnormality when the d-axis target voltage is saturated.
A motor abnormality detection apparatus, comprising:
- an output circuit that applies target voltages to a motor;
- and
- a control circuit that detects an abnormality of the motor based on at least a target voltage,
- wherein the motor is controlled via vector control defined in a coordinate system in which a field current corresponds to a d-axis direction and a q-axis direction is orthogonal to the d-axis direction,
- wherein the at least a target voltage comprises a d-axis target voltage, which is a component of the at least the target voltage in the d-axis direction,
- wherein the control circuit detects the abnormality based on the d-axis target voltage, and
- wherein the control circuit detects the abnormality when a deviation between said d-axis target voltage and a d-axis armature voltage is greater than a predetermined value,
- wherein the d-axis armature voltage is shown by the following expression:
- Vd=R·Id−ωe·Lq·Iq
- wherein R represents an armature resistance, Id represents a d-axis armature current, ωe represents an electrical angular velocity, Lq represents a q-axis inductance, and Iq represents a q-axis armature current.
A motor abnormality detection apparatus, comprising:
- an output circuit that applies target voltages to a motor;
- and
- a control circuit that detects an abnormality of the motor based on at least a target voltage,
- wherein the motor is controlled via vector control defined in a coordinate system in which a field current corresponds to a d-axis direction and a q-axis direction is orthogonal to the d-axis direction,
- wherein the at least a target voltage comprises a q-axis target voltage, which is a component of the at least the target voltage in the q-axis direction,
- wherein the control circuit detects the abnormality based on a q-axis target voltage, and
- wherein the control circuit detects the abnormality when the q-axis target voltage is outside a predetermined range.
A motor abnormality detection apparatus, comprising:
- an output circuit that applies target voltages to a motor;
- and
- a control circuit that detects an abnormality of the motor based on at least a target voltage,
- wherein the motor is controlled via vector control defined in a coordinate system in which a field current corresponds to a d-axis direction and a q-axis direction is orthogonal to the d-axis direction,
- wherein the at least a target voltage comprises a q-axis target voltage, which is a component of the at least the target voltage in the q-axis direction,
- wherein the control circuit detects the abnormality based on a q-axis target voltage, and
- wherein the control circuit detects the abnormality when the q-axis target voltage is saturated.
A motor abnormality detection apparatus, comprising:
- an output circuit that applies target voltages to a motor;
- and
- a control circuit that detects an abnormality of the motor based on at least a target voltage,
- wherein the motor is controlled via vector control defined in a coordinate system in which a field current corresponds to a d-axis direction and a q-axis direction is orthogonal to the d-axis direction,
- wherein the at least a target voltage comprises a q-axis target voltage, which is a component of the at least the target voltage in the q-axis direction,
- wherein the control circuit detects the abnormality based on a q-axis target voltage, and
- wherein the control circuit detects the abnormality when a deviation between the q-axis target voltage and a q-axis armature voltage Vq is greater than a prescribed value,
- wherein the q-axis armature voltage is shown by the following expression:
- Vq=ωe·Ld·Id+R·Iq+ωe·Φa
- wherein ωe represents an electrical angular velocity, Ld represents a d-axis inductance, Id represents a d-axis armature current, R represents an armature resistance, Iq represents a q-axis armature current, Φa represents √(3/2)·Φ′a, and Φ′a represents an armature winding interlinkage magnetic flux maximum value.
Dependencies are inferred from the claim text.