TWI489089B - Absolute angle analysis device - Google Patents

Description

Absolute angle analysis device

The present invention relates to motor position sensing technology, and more particularly to an absolute angle analysis device.

The resolver is an angular displacement sensor whose output voltage is a function of the rotor angle. The excitation coil and the induction coil generate two sinusoidal and cosine voltage amplitude modulation signals when the rotor rotates. The analysis of these signals to obtain the location information is a technical content that effectively overcomes the advantages of optical scale, magnetic ruler, Hall element and rotary type due to its advantages of low cost, good environmental tolerance and high resolution. Photoelectric encoders, etc., as the technical content of position feedback devices, are widely used as position feedback devices for rotary motors because of their high cost, poor resolution, and poor environmental tolerance.

The angle analysis technique disclosed in U.S. Patent No. 6,958,602 is composed of two sets of anglers, and the rotor members of the first set of resolvers have (N-1) salient poles. Wherein, the rotor members of the second set of resolvers have N salient poles, and the N value is a natural number not less than 3, according to which the stator of the first set of resolvers can be generated (N -1) a modulation signal, and at the same time, N modulation signals are generated by the stator of the second set of resolvers, so that when the motor rotor rotates, the modulation signal generated by the stator of the first set of resolvers As the excitation signal of the second set of resolvers, the modulation angle generated by the second set of resolvers is used to resolve the rotation angle and position of the motor rotor, which is the technology disclosed in the patent case. Content, although it is possible to rotate the horse The analysis of the angle of the rotor is limited, but it is difficult to find a higher resolution due to its structural limitations.

Therefore, the main object of the present invention is to provide an absolute angle analysis device capable of providing a modulation signal required for high-precision absolute position analysis to improve the accuracy of analysis while making the absolute angle analysis device. The relative number of appropriate stator or rotor poles can be quickly obtained at design time, shortening the development time.

Therefore, in order to achieve the above object, the absolute angle analysis device provided by the present invention comprises a first resolver having a first stator and a plurality of first stator poles. a first rotor coaxially corresponding to the first stator, and a plurality of first rotor poles are equidistantly disposed on the first rotor and with the first stator poles Correspondingly corresponding; a second resolver having a second stator coaxially corresponding to the first stator, a plurality of second stator poles, the ring being disposed on the second stator, and a second rotor Coaxially corresponding to the second stator, a plurality of second rotor pole rings are disposed on the second rotor, and corresponding to each of the second stator poles, and the second stator pole and the second rotor are The number of magnetic poles is different from the number of the first stator magnetic poles and the first rotor magnetic poles; wherein, the number of each of the stator or rotor magnetic poles is determined according to the following formula 1 or formula 2: The number of certain sub-magnetic poles is: 3*N; the first rotor magnetic pole The quantity is: N*(3*K+S); the number of the second stator poles is: 3*(N+M); the number of the second rotor poles is: (N+M)*(3 *L+S); Among them, N, M, K, and L are natural numbers, and S is 1 or 2.

Equation 2: The number of the first stator magnetic poles is: 4*N; the number of the first rotor magnetic poles is: N*(2*K+1); the number of the second stator magnetic poles is: 4* (N+M); the number of the second rotor magnetic poles is: (N+M)*(2*L+1); wherein, N, M, K, and L are natural numbers.

Further, the first stator and the second stator are respectively annular, and are coaxially adjacent to each other.

The first rotor and the second rotor are respectively annular and coaxially adjacent to each other.

Wherein the first rotor magnetic pole and each of the second rotor magnetic poles respectively protrude from the inner circumferential surface of the first rotor and the second rotor, and each of the first stator magnetic poles and each of the second The stator poles are respectively protruded from the outer circumferential surface of the first stator and the second stator.

(10) ‧‧‧Absolute angle analysis device

(20)‧‧‧First resolver

(21) ‧‧‧first stator

(22)‧‧‧First stator pole

(23) ‧‧‧First rotor

(24)‧‧‧First rotor pole

(30)‧‧‧Second angler

(31) ‧‧‧second stator

(32)‧‧‧Second stator pole

(33) ‧‧‧second rotor

(34)‧‧‧Second rotor pole

(40)‧‧‧ Fixed seat

(41) ‧ ‧ ‧ body

(42) ‧ ‧ internal pressure ring

(43) ‧ ‧ external pressure ring

The first figure is a perspective view of the first recliner in a preferred embodiment of the present invention.

The second figure is a perspective view of the second recoiler in a preferred embodiment of the present invention.

The third figure is a perspective assembled view of a preferred embodiment of the present invention.

The fourth drawing is an exploded perspective view of a preferred embodiment of the present invention.

Figure 5 is a cross-sectional view taken along line 3-5 of Figure 5 of a preferred embodiment of the present invention. view.

Figure 6 is a top plan view of a preferred embodiment of the present invention.

Figure 7 is a bottom plan view of a preferred embodiment of the present invention.

The eighth figure is a modulation signal diagram of a preferred embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS A preferred embodiment of the invention will be described in conjunction with the drawings.

First, referring to the first to seventh figures, in the preferred embodiment of the present invention, an absolute angle analysis device (10) is provided, which mainly includes a first angle resolver (20). ), a second resolver (30) and a fixed seat (40).

The first resolver (20) has a first stator (21) in a ring shape, and a plurality of first stator poles (22) are respectively protruded from the first stator at equal distances from each other (21). On the outer circumferential annulus, an annular first rotor (23) coaxially surrounds the outer circumferential surface of the first stator (21), and a plurality of first rotor magnetic poles (24) are equidistant from each other The ground is disposed on the inner circumferential surface of the first rotor (23), and is adjacent to and spaced apart from each of the first stator magnetic poles (22).

The second resolver (30) has an annular second stator (31) coaxially corresponding to the first stator (21), and a plurality of second stator poles (32) are equidistant from each other A second rotor (33) having an annular shape is formed on the outer circumferential surface of the second stator (31), and is coaxially surrounds the outer circumference of the second stator (31), and most of the second The rotor poles (34) are equidistantly spaced from each other on the inner circumferential surface of the second rotor (33), and are adjacent to and spaced apart from the second stator poles (32).

The fixing base (40) has a tubular body (41) coaxially disposed on the first An inner pressure ring (42) of a suitable thickness is protruded from the stator (21) and the second stator (31) on a circumferential side of the seat body (41), and is interposed between the first stator (21) and Between the second stators (31), the first stator (21) and the second stator (31) are connected to each other and maintained at a distance from each other, and the thickness of the inner pressure ring (42) is equal to An outer pressure ring (43) is interposed between the first rotor (23) and the second rotor (33) for connecting the first rotor (23) and the second rotor (33) and maintaining They are spaced apart from each other.

The absolute angle analysis device (10) is coaxially connected to the rotary motor to be analyzed by the composition of the above components, and the first rotor (23) and the second rotor (33) are coupled to each other. The rotor member of the rotary motor rotates synchronously, so that each of the resolvers (20) (30) obtains the same sine wave signal, thereby generating different sine and cosine modulation signals for providing analysis of the rotary motor rotor The modulation signal required for the location.

Wherein, the first resolver (20) and the second resolver (30) respectively have a stator magnetic pole or a rotor magnetic pole according to the following two formulas to determine the number of magnetic poles thereof, respectively. That is: Equation 1: The number of the first stator magnetic poles is: 3*N; the number of the first rotor magnetic poles is: N*(3*K+S) The number of the second stator magnetic poles is: 3 *(N+M) The number of the second rotor poles is: (N+M)*(3*L+S) where N, M, K, and L are natural numbers, and S is 1 or 2.

According to the calculation of the formula, the following examples can be used, but not limited to:

Equation 2: The number of the first stator magnetic poles is: 4*N; the number of the first rotor magnetic poles is: N*(2*K+1)

The number of the second stator magnetic poles is: 4*(N+M)

The number of the second rotor magnetic poles is: (N+M)*(2*L+1)

Among them, N, M, K and L are natural numbers.

Those calculated according to Equation 2 may be exemplified in the following table, but not limited to:

Specifically, in this embodiment, the second stator magnetic pole is 24, the second stator magnetic pole is 20, and the first rotor magnetic pole is 114. The number of second rotor poles is 115.

Accordingly, the positive and cosine modulation signals generated by the absolute angle analysis device (10) are as shown in the eighth figure, and the first resolver is sequentially arranged from top to bottom (20). The cosine modulation signal and the sine modulation signal generated by the second resolver (30) are generated by the cosine modulation signal and the sine modulation signal, and the rotor of the rotary motor is analyzed based on the modulation signals. The angle of rotation and position, but the method of equal analysis is not the technical feature of the present invention, and will not be redundant here.

(10) ‧‧‧Absolute angle analysis device

(20)‧‧‧First resolver

(30)‧‧‧Second angler

(40)‧‧‧ Fixed seat

(41) ‧ ‧ ‧ body

(43) ‧ ‧ external pressure ring

Claims (8)

An absolute angle analysis device includes: a first resolver having a first stator, a plurality of first stator poles, a ring disposed on the first stator, and a first rotor Coaxially corresponding to the first stator, a plurality of first rotor poles are equidistantly disposed on the first rotor and adjacent to each of the first stator poles; a second resolver, Having a second stator coaxially corresponding to the first stator, a plurality of second stator poles, the ring is disposed on the second stator, and a second rotor is coaxially corresponding to the second stator, and the number is a second rotor pole ring is disposed on the second rotor and adjacent to each of the second stator poles, and the number of the second stator poles and the second rotor poles is different from the first stator poles And the number of the first rotor magnetic poles; wherein: the number of the first stator magnetic poles is: 3*N; the number of the first rotor magnetic poles is: N*(3*K+S); The number of two stator poles is: 3*(N+M); the number of the second rotor poles is: (N+M)*(3*L+S); In, N, M, K and L system is a natural number, S, compared with 1 or 2. The absolute angle analysis device according to claim 1, wherein the first stator and the second stator are respectively annular and coaxially adjacent to each other. The absolute angle analysis device according to claim 2, wherein the first rotor and the second rotor are respectively annular and coaxially adjacent to each other. An absolute angle analysis device according to claim 3, wherein each of the a rotor magnetic pole and each of the second rotor magnetic poles are respectively protruded from the inner circumferential surface of the first rotor and the second rotor, and the first stator magnetic pole and each of the second stator magnetic poles are respectively protruded And on the outer circumferential surface of the first stator and the second stator. An absolute angle analysis device includes: a first resolver having a first stator, a plurality of first stator poles, a ring disposed on the first stator, and a first rotor Coaxially corresponding to the first stator, a plurality of first rotor poles are equidistantly disposed on the first rotor and adjacent to each of the first stator poles; a second resolver, Having a second stator coaxially corresponding to the first stator, a plurality of second stator poles, the ring is disposed on the second stator, and a second rotor is coaxially corresponding to the second stator, and the number is a second rotor pole ring is disposed on the second rotor and adjacent to each of the second stator poles, and the number of the second stator poles and the second rotor poles is different from the first stator poles And the number of the first rotor magnetic poles; wherein: the number of the first stator magnetic poles is: 4*N; the number of the first rotor magnetic poles is: N*(2*K+1); The number of two stator poles is: 4*(N+M); the number of the second rotor poles is: (N+M)*(2*L+1); In, N, M, K and L system is a natural number. The absolute angle analysis device according to claim 5, wherein the first stator and the second stator are respectively annular and coaxially adjacent to each other. An absolute angle analysis device according to claim 6 of the patent application scope, wherein the first The rotor and the second rotor are respectively annular and coaxially adjacent to each other. The absolute angle analysis device according to claim 7, wherein each of the first rotor magnetic poles and each of the second rotor magnetic poles protrudes from an inner circumferential surface of the first rotor and the second rotor, respectively. And the first stator magnetic poles and the second stator magnetic poles respectively protrude from the outer circumferential surface of the first stator and the second stator.