CN110309519B - Method for improving magneto-resistive type rotary transformation precision - Google Patents
Method for improving magneto-resistive type rotary transformation precision Download PDFInfo
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- CN110309519B CN110309519B CN201810255173.6A CN201810255173A CN110309519B CN 110309519 B CN110309519 B CN 110309519B CN 201810255173 A CN201810255173 A CN 201810255173A CN 110309519 B CN110309519 B CN 110309519B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
- G06F17/10—Complex mathematical operations
- G06F17/14—Fourier, Walsh or analogous domain transformations, e.g. Laplace, Hilbert, Karhunen-Loeve, transforms
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
Abstract
The invention relates to a method for improving reluctance type rotation precision, which comprises the steps of forming a salient pole by a sine function, forming a motor rotor excircle by the salient pole through a circumferential array, testing rotation output potential waveforms, decomposing the frequency and amplitude of harmonic waves through Fourier transformation, then subtracting the function of the harmonic waves by the sine function to form a new salient pole, and finally forming the rotation rotor excircle by the new salient pole through the circumferential array. The rotary air gap made by the method is in sine distribution, meanwhile, the potential harmonic function is subtracted from the excircle function, suppression is removed from the result generated by counter potential harmonic, the principle is simple and effective, the operability is strong, and the rotary precision can be improved.
Description
Technical Field
The invention relates to the technical field of rotary transformers, in particular to a method for improving reluctance type rotary transformer precision.
Background
The rotary transformer (spin transformer) is a special form of multipolar rotary transformer, which is used as a small AC motor for measuring angle and is used for measuring the angular displacement and angular velocity of a rotating shaft of a rotating object.
In the current rotation-transformation design, the harmonic content of an output waveform is mainly restrained through the adjustment of the number of turns of a winding, but when the number of special pole grooves is matched, for example, the number of grooves is a multiple of 4 of the number of poles, the method cannot be applied, the electrical precision of the output winding is deteriorated when the low harmonic exists, and the precision of the whole servo system is reduced.
Disclosure of Invention
The invention provides a method for improving reluctance type rotation precision, which is simple and effective in principle and strong in operability, and suppresses the counter potential harmonic wave generated result.
In order to achieve the purpose of the invention, the technical scheme adopted is as follows: a method for improving magneto-resistive type rotation precision comprises the following steps:
1) Forming a salient pole by using a function containing sine, wherein a plurality of salient poles form an outer circle of a rotor of the rotary transformer in a circumferential array mode, and the number of the circumferential arrays is equal to the number of poles;
2) Testing the output potential waveform of the rotary transformer, and subtracting the function consisting of counter potential harmonic waves of the rotary transformer from the function containing sine in the step 1);
3) And (3) adjusting the salient poles of the step (1) by using a new function formed by the subtraction result of the step (2), and finally forming the rotor excircle of the rotary transformer by the adjusted salient poles through a circumferential array.
As an optimization scheme of the invention, in step 2), fourier transformation is performed on the output potential waveform to obtain counter potential harmonic frequencies and amplitudes of the resolver.
As an optimization scheme of the invention, the function containing sine is as follows:
function comprising sine minus back-emf harmonic composition
Wherein: x is an abscissa, y is an ordinate, θ is a mechanical angle, c is a radial distance from a lowest point of a salient pole to a highest point of the salient pole, V is a distance from a lowest point of the salient pole to a circle center, p is a pole pair number of rotation change, a is a ratio of a harmonic amplitude to a fundamental amplitude, and ω is a frequency of a harmonic.
As an optimization scheme of the invention, the connecting line between the vertex of the salient pole and the center of the circle is perpendicular to the connecting lines of the two lowest points of the salient pole.
As an optimization scheme of the invention, the pole number of the rotary transformer is more than or equal to 1.
As an optimization scheme of the invention, the reluctance type rotary transformer is of an outer rotor structure.
The invention has the positive effects that: the invention uses the function containing sine wave to subtract the function composed of output potential harmonic wave, finally composes the rotor excircle through the circumference array, directly removes from the result generated by the harmonic wave, and can eliminate the harmonic wave of specific times and specific times combination.
Drawings
The invention will be described in further detail with reference to the drawings and the detailed description.
Fig. 1 is an overall flow chart of the present invention.
Detailed Description
As shown in fig. 1, the invention discloses a method for improving magneto-resistive type rotation precision, which comprises the following steps:
1) Forming a salient pole by using a function containing sine, wherein a plurality of salient poles form an outer circle of a rotor of the rotary transformer in a circumferential array mode, and the number of the circumferential arrays is equal to the number of poles;
2) Testing the output potential waveform of the rotary transformer, and subtracting the function consisting of counter potential harmonic waves of the rotary transformer from the function containing sine in the step 1);
3) And (3) adjusting the salient poles of the step (1) by using a new function formed by the subtraction result of the step (2), and finally forming the rotor excircle of the rotary transformer by the adjusted salient poles through a circumferential array.
And 2) performing Fourier transformation on the output potential waveform to obtain counter potential harmonic frequency and amplitude of the rotary transformer.
The function containing a sine is:
function comprising sine minus back-emf harmonic composition
Wherein: x is an abscissa, y is an ordinate, θ is a mechanical angle, c is a radial distance from a lowest point of a salient pole to a highest point of the salient pole, V is a distance from a lowest point of the salient pole to a circle center, p is a pole pair number of rotation change, a is a ratio of a harmonic amplitude to a fundamental amplitude, and ω is a frequency of a harmonic.
At this time, the connection line between the salient pole vertex and the center of the circle of the rotary transformer is perpendicular to the two lowest point connection lines of the salient poles. The minimum distance from the salient pole top point to the stator inner circle is a rotary air gap, and the rotary air gap made by the method is in sine distribution.
The pole number of the rotary transformer is more than or equal to 1, and the reluctance type rotary transformer is of an outer rotor structure.
While the foregoing is directed to embodiments of the present invention, other and further details of the invention may be had by the present invention, it should be understood that the foregoing description is merely illustrative of the present invention and that no limitations are intended to the scope of the invention, except insofar as modifications, equivalents, improvements or modifications are within the spirit and principles of the invention.
Claims (5)
1. A method for improving reluctance type rotary transformation precision is characterized in that: the method comprises the following steps:
1) Forming a salient pole by using a function containing sine, wherein a plurality of salient poles form an outer circle of a rotor of the rotary transformer in a circumferential array mode, and the number of the circumferential arrays is equal to the number of poles;
2) Testing the output potential waveform of the rotary transformer, and subtracting the function consisting of counter potential harmonic waves of the rotary transformer from the function containing sine in the step 1);
3) Adjusting the salient poles of the step 1) by using a new function formed by the subtraction result of the step 2), wherein the adjusted salient poles finally form the rotor excircle of the rotary transformer through a circumferential array; the minimum distance from the salient pole top point to the stator inner circle is a rotary air gap, and the rotary air gap is in sine distribution.
2. A method of improving magneto-resistive type rotational precision as claimed in claim 1, wherein: and 2) performing Fourier transformation on the output potential waveform to obtain counter potential harmonic frequency and amplitude of the rotary transformer.
3. A method of improving magneto-resistive type rotational precision as claimed in claim 1, wherein: the connecting line between the vertex of the salient pole and the center of the circle is perpendicular to the connecting lines of the two lowest points of the salient pole.
4. A method of improving magneto-resistive type rotational precision as claimed in claim 1, wherein: the pole number of the rotary transformer is more than or equal to 1.
5. A method of improving magneto-resistive type rotational precision as claimed in claim 1, wherein: the rotary transformer is of an outer rotor structure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810255173.6A CN110309519B (en) | 2018-03-27 | 2018-03-27 | Method for improving magneto-resistive type rotary transformation precision |
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| CN201810255173.6A CN110309519B (en) | 2018-03-27 | 2018-03-27 | Method for improving magneto-resistive type rotary transformation precision |
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| CN110309519A CN110309519A (en) | 2019-10-08 |
| CN110309519B true CN110309519B (en) | 2023-07-14 |
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| CN112271964A (en) * | 2020-11-12 | 2021-01-26 | 武汉光庭信息技术股份有限公司 | Harmonic suppression method for permanent magnet synchronous motor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06213614A (en) * | 1993-01-19 | 1994-08-05 | Akira Ishizaki | Position detection device |
| CN107492960A (en) * | 2017-09-07 | 2017-12-19 | 日本电产凯宇汽车电器（江苏）有限公司 | A kind of cylindrical structure of the punching of permanent-magnetic synchronous motor rotor |
| CN108365721A (en) * | 2018-01-24 | 2018-08-03 | 日本电产凯宇汽车电器（江苏）有限公司 | A kind of permanent magnet synchronous motor back-emf harmonic suppressing method and permanent magnet synchronous motor |
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2018
- 2018-03-27 CN CN201810255173.6A patent/CN110309519B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06213614A (en) * | 1993-01-19 | 1994-08-05 | Akira Ishizaki | Position detection device |
| CN107492960A (en) * | 2017-09-07 | 2017-12-19 | 日本电产凯宇汽车电器（江苏）有限公司 | A kind of cylindrical structure of the punching of permanent-magnetic synchronous motor rotor |
| CN108365721A (en) * | 2018-01-24 | 2018-08-03 | 日本电产凯宇汽车电器（江苏）有限公司 | A kind of permanent magnet synchronous motor back-emf harmonic suppressing method and permanent magnet synchronous motor |
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