阅读说明：本技术 多组多相旋转电机的控制装置以及多组多相旋转电机的驱动装置 (Control device for multi-phase rotating electrical machines and drive device for multi-phase rotating electrical machines ) 是由 深山义浩 枦山盛幸 冈崎广大 于 2018-12-11 设计创作，主要内容包括：一种多组多相旋转电机的控制装置1,控制在机械空间相位相差180/N(N为2以上的整数)度的位置配置有不同组的绕组的多组多相旋转电机,该多组多相旋转电机的控制装置1具备：控制目标运算部410,基于转矩指令值计算各相的初始电流指令值；校正系数计算部411,根据由多组多相旋转电机旋转时的相对于旋转周期性的磁通密度波动所引起的电磁力的空间模式M(M为0或正整数)计算与各组对应的各组校正系数；以及电流指令值校正部412,基于初始电流指令值和所述各组校正系数计算校正后的各相的电流指令值。(A control device (1) for a multi-phase rotating electrical machine, which controls a multi-phase rotating electrical machine in which windings of different groups are arranged at positions that differ in mechanical spatial phase by 180/N (N is an integer of 2 or more), the control device (1) comprising: a control target calculation unit 410 that calculates an initial current command value for each phase based on the torque command value; a correction coefficient calculation unit 411 that calculates correction coefficients for respective groups corresponding to the respective groups based on a spatial pattern M (M is 0 or a positive integer) of electromagnetic force caused by flux density fluctuation with respect to rotation periodicity when the plurality of groups of multiphase rotating electrical machines rotate; and a current command value correction unit 412 that calculates a corrected current command value for each phase based on the initial current command value and the correction coefficients for each group.)

1. A control device for a multi-group multi-phase rotating electrical machine, which controls a multi-group multi-phase rotating electrical machine in which different groups of windings are arranged at positions that differ in mechanical spatial phase by 180/N degrees, where N is an integer of 2 or more, the control device comprising:

a control target calculation unit that calculates an initial current command value for each phase based on the torque command value;

a correction coefficient calculation section that calculates each set of correction coefficients corresponding to each set, based on a spatial pattern M of electromagnetic force caused by magnetic flux density fluctuation with respect to rotation periodicity when the plurality of sets of multiphase rotary electric machines are rotating, where M is 0 or a positive integer; and

and a current command value correction unit that calculates the corrected current command value for each phase based on the initial current command value and each set of correction coefficients.

2. The control device of a plurality of sets of multiphase rotary electric machines according to claim 1,

the correction coefficient calculation unit calculates each set of correction coefficients using the detected value of the magnetic flux fluctuation of each set of the plurality of sets of multiphase rotating electrical machines.

3. The control device of a plurality of sets of multiphase rotary electric machines according to claim 2,

the detected value of the magnetic flux fluctuation of each of the plurality of groups of multiphase rotating electrical machines is a value detected at a plurality of portions of a gap between a rotor and a stator of the plurality of groups of multiphase rotating electrical machines.

4. The control device of a plurality of sets of multiphase rotary electric machines according to claim 2,

the detection value of the magnetic flux fluctuation of each of the plurality of groups of multiphase rotating electrical machines is a value calculated from eccentric vectors detected at 3 or more positions of a gap between a rotor and a stator of the plurality of groups of multiphase rotating electrical machines.

5. The control device of a plurality of sets of multiphase rotary electric machines according to claim 2,

the detection value of the magnetic flux fluctuation of each of the plurality of sets of multiphase rotating electrical machines is a value calculated from fluctuation of no-load induced voltage using stator coils of the plurality of sets of multiphase rotating electrical machines.

6. The control device of a plurality of sets of multiphase rotary electric machines according to claim 1,

the correction coefficient calculation unit calculates each set of correction coefficients using an estimated value of magnetic flux fluctuation of each set of the plurality of sets of multiphase rotating electrical machines.

7. The control device for a multi-group multi-phase rotary electric machine according to any one of claims 1 to 6,

the correction coefficient calculation unit calculates an eccentricity vector from the magnetic flux fluctuation of each of the plurality of groups of multiphase rotating electrical machines and corrects the output of the rotation angle detector.

8. The control device for a multi-group multi-phase rotary electric machine according to any one of claims 1 to 7,

the fluctuation in magnetic flux density with respect to the rotation periodicity when the plurality of sets of multiphase rotary electric machines are rotated is caused by an eccentricity error of the plurality of sets of multiphase rotary electric machines.

9. The control device for a multi-group multi-phase rotary electric machine according to any one of claims 1 to 7,

the fluctuation in magnetic flux density with respect to the rotation periodicity when the plurality of sets of multiphase rotary electric machines are rotated is caused by the elliptic deformation of the plurality of sets of multiphase rotary electric machines.

10. A drive device for a multi-group multi-phase rotating electrical machine, comprising:

a control device for a multi-group multi-phase rotary electric machine according to any one of claims 1 to 9; and

and an inverter that receives the current command correction value from the control device and causes current to flow through the windings of the plurality of groups of multiphase rotary electric machines based on the current command correction value.

Technical Field

The present invention relates to a control device for a plurality of multiphase rotating electrical machines used in an electric power steering device, a hoisting machine of an elevator, and the like, and a drive device for a plurality of multiphase rotating electrical machines.

Background

A control device for controlling a plurality of sets of multiphase rotary electric machines using a plurality of 3-phase inverters is disclosed (for example, see patent document 1). Further, a control device for correcting the phase current values of the respective phases in order to reduce torque ripple generated in a rotating electric machine having an eccentric shaft in a winding is disclosed (for example, see patent document 2).

Disclosure of Invention

Technical problem to be solved by the invention

In general, an eccentricity or a deviation in roundness of a stator or a rotor occurs due to a manufacturing error of a rotating electrical machine. Due to such eccentricity or roundness deviation, the gap between the stator and the rotor varies during one rotation cycle. Therefore, there are the following problems: fluctuations in magnetic flux density occur during one rotation period, generating vibration and noise.

In the conventional rotating electric machine control method, the fluctuation of the magnetic flux density occurring during the one rotation period cannot be corrected, and the generation of vibration and noise cannot be suppressed.

The present invention has been made to solve the above-described technical problem, and an object of the present invention is to correct fluctuations in magnetic flux density occurring during one rotation cycle even if eccentricity or deviation in circularity of a stator or a rotor occurs due to manufacturing errors of a rotating electrical machine. As a result, the vibration and noise of the rotating electric machine can be suppressed.

Means for solving the problems

A control device for a multi-phase rotary electric machine according to the present invention controls a multi-phase rotary electric machine in which different sets of windings are arranged at positions that differ in mechanical space phase by 180/N (N is an integer of 2 or more), the control device comprising:

a control target calculation unit that calculates an initial current command value for each phase based on the torque command value;

a correction coefficient calculation unit that calculates each set of correction coefficients corresponding to each set, based on a spatial pattern M (M is 0 or a positive integer) of electromagnetic force caused by flux density fluctuation with respect to rotation periodicity when the plurality of sets of multiphase rotating electrical machines rotate; and

and a current command value correction unit that calculates a corrected current command value for each phase based on the initial current command value and each set of correction coefficients.

Effects of the invention

Because the present invention comprises:

a correction coefficient calculation unit that calculates each set of correction coefficients corresponding to each set, based on a spatial pattern M (M is 0 or a positive integer) of electromagnetic force caused by flux density fluctuation with respect to rotation periodicity when the plurality of sets of multiphase rotating electrical machines rotate; and

a current command value correction unit that calculates a corrected current command value for each phase based on the initial current command value and each set of correction coefficients,

therefore, even if eccentricity or deviation in circularity of the stator or rotor occurs due to manufacturing errors of the rotating electrical machine, it is possible to correct fluctuation in magnetic flux density that occurs during one rotation cycle.

Drawings

Fig. 1 is a schematic cross-sectional view of a rotating electric machine according to embodiment 1 of the present invention.

Fig. 2 is a schematic diagram showing connection between the rotating electric machine and the inverter according to embodiment 1 of the present invention.

Fig. 3 is a schematic diagram showing a control device for a rotating electric machine according to embodiment 1 of the present invention.

Fig. 4 is a flowchart showing a flow of processing of the control device for the rotating electric machine according to embodiment 1 of the present invention.

Fig. 5 is a configuration diagram showing a hardware configuration of a control device for a rotating electric machine according to embodiment 1 of the present invention.

Fig. 6 is a schematic cross-sectional view of a rotating electric machine according to embodiment 2 of the present invention.

Fig. 7 is a schematic sectional view of a rotating electric machine according to embodiment 3 of the present invention.

Fig. 8 is a schematic sectional view of a rotating electric machine according to embodiment 4 of the present invention.

Fig. 9 is a schematic sectional view of a rotating electric machine according to embodiment 5 of the present invention.

Reference numerals

1: a control device; 2: a rotating electric machine; 3: an inverter; 201: a rotor; 202: a stator; 203: a rotor core; 204: a permanent magnet; 205: a shaft; 206: a magnet slot; 207: a stator yoke; 208: stator teeth; 209: a stator slot; 210: a stator coil; 410: a control target calculation unit; 411: a correction coefficient calculation unit; 412: a current command value correction unit; 413: a voltage conversion unit; 414: and a PWM operation unit.

Detailed Description