초록 ▼

A rotary electric machine controller according to the present application includes: a superimposer for superimposing a high-frequency signal on one of a voltage and a current of a motor having saliency; an estimator for calculating an estimate value of a magnetic-pole position of a rotor included in

A rotary electric machine controller according to the present application includes: a superimposer for superimposing a high-frequency signal on one of a voltage and a current of a motor having saliency; an estimator for calculating an estimate value of a magnetic-pole position of a rotor included in the rotary electric machine based on a high-frequency component appearing in the other one of the voltage and the current of the rotary electric machine; a retainer for retaining information relating to a correction amount corresponding to the estimate value of the magnetic-pole position of the rotor; and a corrector for correcting the estimate value of the magnetic-pole position of the rotor based on the information relating to the correction amount.

대표청구항 ▼

1. A rotary electric machine controller, comprising: a superimposer for superimposing a high-frequency signal on one of a voltage and a current of a rotary electric machine having saliency;an estimator for calculating an estimate value of a magnetic-pole position of a rotor included in the rotary el

1. A rotary electric machine controller, comprising: a superimposer for superimposing a high-frequency signal on one of a voltage and a current of a rotary electric machine having saliency;an estimator for calculating an estimate value of a magnetic-pole position of a rotor included in the rotary electric machine based on a high-frequency component appearing in the other one of the voltage and the current of the rotary electric machine;a retainer for retaining correction amount relating values which are different from each other for at least two points of the magnetic-pole position of the rotor; anda corrector for acquiring one of the correction amount relating values retained by the retainer corresponding to the estimate value of the magnetic-pole position of the rotor and correcting the estimate value of the magnetic-pole position of the rotor based on the acquired one of the correction amount relating values. 2. The rotary electric machine controller according to claim 1, wherein: the retainer retains the correction amount relating values associated with respective points of a torque current (q-axis current), respective points of a field current (d-axis current), and respective points of the magnetic-pole position of the rotor of the rotary electric machine; andthe corrector acquires the one of the correction amount relating values corresponding to a detected value of the torque current, a detected value of the field current, and the estimate value of the magnetic-pole position of the rotor. 3. The rotary electric machine controller according to claim 1, wherein the correction amount relating values contains a high-frequency inductance due to d- and q-axes mutual interference, which changes in accordance with the magnetic-pole position of the rotor. 4. The rotary electric machine controller according to claim 1, wherein the corrector corrects the estimate value of the magnetic-pole position of the rotor so that D expressed by Mathematical Formula (1) approaches zero, [Math.⁢1]D=Iqhe+λ⁢⁢Idhe(1)λ=LdqhLqh(2)where λ is the one of the correction amount relating values and is a variable expressed by Mathematical Formula (2), Idhe is a high-frequency component of an estimated d-axis current, Iqhe is a high-frequency component of an estimated q-axis current, Ldqh is a high-frequency inductance due to d- and q-axes mutual interference, and Lqh is a high-frequency inductance of a q-axis. 5. The rotary electric machine controller according to claim 4, wherein the corrector corrects the estimate value of the magnetic-pole position of the rotor so that an integrated value of the D approaches zero. 6. The rotary electric machine controller according to claim 1, wherein the correction amount relating values are generated and retained for each of at least two points of the magnetic-pole position of the rotor based on a d-axis interlinkage magnetic flux due to a d-axis current, a q-axis interlinkage magnetic flux due to a q-axis current, an interlinkage magnetic flux due to a magnet included in the rotary electric machine, a high-frequency component of the d-axis current, and a high-frequency component of the q-axis current. 7. The rotary electric machine controller according to claim 1, wherein the correction amount relating values are generated and retained for each of at least two points of the magnetic-pole position of the rotor based on the high-frequency component appearing in the other one of the voltage and the current of the rotary electric machine provided with a magnetic-pole position detector when the high-frequency signal is superimposed on the one of the voltage and the current. 8. The rotary electric machine controller according to claim 1, wherein the rotary electric machine comprises a concentrated-winding motor. 9. A rotary electric machine control method, which is executed on a microprocessor executing information processing in accordance with a program stored in memory, the method comprising: superimposing a high-frequency signal on one of a voltage and a current of a rotary electric machine having saliency;calculating an estimate value of a magnetic-pole position of a rotor included in the rotary electric machine based on a high-frequency component appearing in the other one of the voltage and the current of the rotary electric machine;retaining correction amount relating values which are different from each other for at least two points of the magnetic-pole position of the rotor; andacquiring one of the correction amount relating values retained corresponding to the estimate value of the magnetic-pole position of the rotor; andcorrecting the estimate value of the magnetic-pole position of the rotor based on the acquired one of the correction amount relating values. 10. A method of creating a control map to be retained in a rotary electric machine controller, which is executed on a microprocessor executing information processing accordance with in memory, the method comprising: generating, for each of at least two points of a magnetic-pole position of a rotor included in a rotary electric machine having saliency, correction amount relating values for correcting an estimate value of the magnetic-pole position of the rotor, correction amount relating values being calculated based on a high-frequency component appearing in one of a voltage and a current of the rotary electric machine when a high-frequency signal is superimposed on the other one of the voltage and the current; andassociating, on the control map, the points of the magnetic-pole position of the rotor and the information relating to the correction amount relating values generated for each of the points with each other.