JP4862122B2 - Angle detector - Google Patents
Angle detector Download PDFInfo
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- JP4862122B2 JP4862122B2 JP2006310273A JP2006310273A JP4862122B2 JP 4862122 B2 JP4862122 B2 JP 4862122B2 JP 2006310273 A JP2006310273 A JP 2006310273A JP 2006310273 A JP2006310273 A JP 2006310273A JP 4862122 B2 JP4862122 B2 JP 4862122B2
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本発明は、角度検出器に関し、特に、一枚構成の固定子共通下部板に設けた複数のステータ巻線の巻線磁芯に固定子上部板を設け、この固定子共通下部板と各固定子上部板間の固定子空隙部内に磁性体回転子を回転自在とし、回転軸振れによる空隙変動の影響をなくし、各固定子上部板を独立して分割配置することにより、磁性体回転子極の機械的な位置による磁界分布の影響をなくすようにするための新規な改良に関する。 The present invention relates to an angle detector, and in particular, a stator upper plate is provided on a winding core of a plurality of stator windings provided on a single stator common lower plate, and the stator common lower plate and each stator are fixed. Magnetic rotor can be rotated in the stator gap between the upper and lower stator plates, eliminating the effect of air gap fluctuations due to rotational shaft runout, and by arranging the stator upper plates independently and separately. The present invention relates to a novel improvement for eliminating the influence of the magnetic field distribution due to the mechanical position of the magnetic field.
従来、用いられていたこの種の薄型のレゾルバとしては、図４及び図５で示される回転トランスを用いた構成、及び、図６で示される特許文献１のバリアブルリラクタンス型のレゾルバの構成を挙げることができる。
すなわち、図４及び図５で示される従来構成のケーシング１内には、レゾルバ部２と回転トランス部３とが軸方向に沿って重合して配設されている。
Conventionally used thin resolvers of this type include the configuration using the rotary transformer shown in FIGS. 4 and 5 and the configuration of the variable reluctance resolver of Patent Document 1 shown in FIG. be able to.
That is, in the casing 1 having the conventional configuration shown in FIGS. 4 and 5, the
また、図６において示される他の従来構成のレゾルバ部２は、輪状でレゾルバステータコイル４を有するステータ５と、前記ステータ５内に設けられコイルを有しない輪状のロータ６が回転自在に内設されている。
Further, another
また、前述の図４、図５及び図６におけるレゾルバの巻線の配線図は図８で示されるように構成され、励磁巻線Ｒ１，Ｒ２は１相よりなり、検出側の出力巻線Ｓ１〜Ｓ４は２相で構成されている。
また、前記各出力巻線Ｓ１〜Ｓ４による出力電圧曲線及び出力電圧方程式は図７で示される。
Further, the wiring diagrams of the resolver windings in FIGS. 4, 5 and 6 are configured as shown in FIG. 8, and the excitation windings R1 and R2 are composed of one phase, and the output winding S1 on the detection side. ˜S4 is composed of two phases.
An output voltage curve and an output voltage equation by the output windings S1 to S4 are shown in FIG.
従来の薄型のレゾルバは、以上のように構成されていたため、次のような課題が存在していた。
すなわち、図４及び図５に開示された従来構成においては、レゾルバ部と回転トランス部とが軸方向に重合されているため、レゾルバ自体の厚さが厚く（１６ｍｍが最小）なり、より扁平な形状とすることは極めて困難であった。
また、図６の他の従来構成においては、コイルとしてはレゾルバステータコイルのみで済むが、ステータに巻回したレゾルバステータコイルがステータの両面に突出するため、このレゾルバステータコイルの絶縁用の絶縁カバー及びコイルカバー等を必要とし、これらのステータへの装置によって厚さが厚く（１０ｍｍが最小）なり、前述と同様に、扁平状に構成することが極めて困難であった。また、ロータにコイルを有していないため、検出精度には限界があった。
また、従来構成においては、ロータの外周とステータの各磁極の内周とのギャップパーミアンスの変化により回転検出を行うため、回転軸振れが発生すると空隙変動に影響していた。
また、固定子が一体構造であるため、励磁巻線により発生する磁界分布が検出用回転子極の機械的な位置により影響を受けていた。
Since the conventional thin resolver is configured as described above, the following problems exist.
That is, in the conventional configuration disclosed in FIGS. 4 and 5, since the resolver part and the rotary transformer part are superposed in the axial direction, the resolver itself is thicker (16 mm is the minimum), and is flatter. It was extremely difficult to form.
In the other conventional configuration shown in FIG. 6, only the resolver stator coil is required as the coil. However, since the resolver stator coil wound around the stator protrudes on both sides of the stator, an insulating cover for insulating the resolver stator coil is used. In addition, a coil cover or the like is required, and the thickness of the stator is increased (10 mm is minimum), and it is extremely difficult to form a flat shape as described above. Further, since the rotor does not have a coil, the detection accuracy is limited.
Further, in the conventional configuration, rotation detection is performed by changing the gap permeance between the outer periphery of the rotor and the inner periphery of each magnetic pole of the stator.
In addition, since the stator has an integral structure, the magnetic field distribution generated by the excitation winding is affected by the mechanical position of the detection rotor pole.
本発明による角度検出器は、磁性材料からなる板で形成された固定子共通下部板と、前記固定子共通下部板の周縁部に沿って周期的又は非周期的に設けられた複数の巻線磁芯と、前記各巻線磁芯に設けられ励磁巻線及び検出巻線からなるステータ巻線と、前記各巻線磁芯に設けられ前記固定子共通下部板に対向して配設された複数の固定子上部板と、前記固定子共通下部板と前記各固定子上部板との間に形成された複数の固定子空隙部と、前記固定子共通下部板の軸心位置に形成された軸孔に回転自在に設けられた回転軸と、前記回転軸に設けられ偏芯あるいはその外縁を半径方向に周期的に変化させ、かつ、前記各固定子空隙部内に前記外縁が回転自在に位置する板形状の磁性体回転子と、を備え、前記磁性体回転子を回転させることにより、前記磁性体回転子の前記外縁が前記固定子空隙部内で前記固定子共通下部板の半径方向に沿って変化するようにした構成であり、また、前記固定子共通下部板は、一体に形成された一枚の磁性板で形成されている構成である。 An angle detector according to the present invention includes a stator common lower plate formed of a plate made of a magnetic material, and a plurality of windings provided periodically or aperiodically along a peripheral edge of the stator common lower plate. A plurality of magnetic cores, a stator winding provided on each winding magnetic core and formed of an excitation winding and a detection winding, and a plurality of windings provided on each winding magnetic core and facing the stator common lower plate A stator upper plate, a plurality of stator gaps formed between the stator common lower plate and the stator upper plates, and a shaft hole formed at the axial center position of the stator common lower plate A rotating shaft that is rotatably provided on the rotating shaft, and a plate that is provided on the rotating shaft and whose eccentricity or its outer edge is periodically changed in the radial direction, and the outer edge is rotatably located in each stator gap. A magnetic rotor having a shape, and rotating the magnetic rotor. The outer edge of the magnetic rotor changes along the radial direction of the stator common lower plate in the stator gap, and the stator common lower plate is integrally formed. It is the structure formed with the one magnetic plate made.
本発明による角度検出器は、以上のように構成されているため、次のような効果を得ることができる。
すなわち、一枚構成の固定子共通下部板に設けた複数のステータ巻線の巻線磁芯に固定子上部板を設け、この固定子共通下部板と各固定子上部板間の固定子空隙部内に磁性体回転子を回転自在としているため、回転に伴う角度情報は、固定子上部板と磁性体回転子の鎖交する量に依存し、例え、回転軸の軸振れが生じた場合でも、固定子側からみた固定子空隙部は機械的に一定となり、軸振れに影響されることなく安定した高精度な角度検出を行うことができる。
また、固定子を構成する各固定子上部板が固定子共通下部版上で分割して独立していることにより、他の磁性体回転子極の機械的な位置による励磁磁界分布のゆがみをなくすことが可能となり、従来より小空間でより高精度の角度検出が可能となった。
Since the angle detector according to the present invention is configured as described above, the following effects can be obtained.
That is, a stator upper plate is provided on the winding core of a plurality of stator windings provided on a single stator common lower plate, and the stator gap between the stator common lower plate and each stator upper plate is provided. Since the magnetic rotor is rotatable, the angle information associated with the rotation depends on the amount of interlinkage between the stator upper plate and the magnetic rotor, for example, even when the shaft runout occurs. The stator gap as viewed from the stator side is mechanically constant, and stable and highly accurate angle detection can be performed without being affected by shaft runout.
In addition, since each stator upper plate constituting the stator is divided and independent on the stator common lower plate, distortion of the excitation magnetic field distribution due to the mechanical position of other magnetic rotor poles is eliminated. This makes it possible to detect angles with higher accuracy in a smaller space than before.
本発明は、一枚構成の固定子共通下部板に設けた複数のステータ巻線の巻線磁芯に固定子上部板を設け、この固定子共通下部板と各固定子上部板間の固定子空隙部内に磁性体回転子を回転自在とし、回転軸振れによる空隙変動の影響をなくし、各固定子上部板を独立して分割配置することにより、磁性体回転子極の機械的な位置による磁界分布の影響をなくすようにした角度検出器を提供することを目的とする。 The present invention provides a stator upper plate on a winding core of a plurality of stator windings provided on a single stator common lower plate, and a stator between the stator common lower plate and each stator upper plate. Magnetic field rotor due to the mechanical position of the magnetic rotor pole by making the magnetic rotor freely rotatable in the air gap, eliminating the influence of air gap fluctuations due to rotational shaft runout, and separately arranging the stator upper plates. An object of the present invention is to provide an angle detector in which the influence of distribution is eliminated.
以下、図面と共に本発明による角度検出器の好適な実施の形態について説明する。
尚、従来例と同一又は同等部分には同一符号を付して説明する。
図１において符号５で示されるものはステータであり、このステータ５は、一枚の一体に形成された磁性板よりなる円板状の固定子共通下部板１０と、この固定子共通下部板１０の周縁部１１に所定角度毎である周期的又は非周期的に分割して、かつ、各々独立して設けられた複数の巻線磁芯１２（図３で示す）と、弧状をなす前記巻線磁芯１２の外周に二段状に重合して巻回装着された励磁巻線１３及び検出巻線１４からなるステータ巻線４と、前記各巻線磁芯１２上に装着して設けられた固定子上部板１５とから構成されている。
Hereinafter, preferred embodiments of an angle detector according to the present invention will be described with reference to the drawings.
In addition, the same code | symbol is attached | subjected and demonstrated to a part the same as that of a prior art example, or an equivalent part.
In FIG. 1, a reference numeral 5 denotes a stator. The stator 5 includes a disk-shaped stator common lower plate 10 made of a single magnetic plate, and the stator common lower plate 10. And a plurality of winding cores 12 (shown in FIG. 3) that are divided periodically or aperiodically at a predetermined angle and are provided independently on the peripheral edge 11 of each of the peripheral portions 11 and the arc-shaped winding A stator winding 4 composed of an excitation winding 13 and a detection winding 14 that are wound in a two-stage manner on the outer circumference of the wire core 12, and is mounted on each winding core 12. And a stator upper plate 15.
前記各固定子上部板１５は、図示のように、全体形状が扇形をなす磁性板の内側を切除した形状よりなり、前記ステータ巻線４よりも内方へ突出すると共に前記固定子共通下部板１０と対向している。
従って、前記固定子共通下部板１０と固定子上部板１５との間には、前記巻線磁芯１２の高さに等しい空隙からなる複数の固定子空隙部１６が形成されている。
As shown in the drawing, each stator upper plate 15 has a shape obtained by cutting the inside of a magnetic plate having a sector shape, protrudes inward from the stator winding 4 and is fixed to the stator common lower plate. 10 is opposed.
Therefore, a plurality of stator gap portions 16 each having a gap equal to the height of the winding core 12 are formed between the stator common lower plate 10 and the stator upper plate 15.
前記固定子共通下部板１０の磁心位置には、回転軸２０を回転自在に設けるための軸孔２１が形成され、この回転軸２０には、一体焼成又は積層構成からなる磁性体回転子６が設けられ、この回転軸２０の回転により、この磁性体回転子６が回転するように構成されている。 A shaft hole 21 for rotatably providing a rotating shaft 20 is formed at the magnetic core position of the stator common lower plate 10, and the rotating body 20 is provided with a magnetic rotor 6 having an integrally fired or laminated structure. The magnetic rotor 6 is configured to rotate by rotation of the rotating shaft 20.
前記磁性体回転子６は、その外縁６ａがその半径方向又は固定子共通下部板１０の半径方向に周期的に変化し、かつ、前記固定子空隙部１６内に位置した板体で形成されている。
尚、図１では、その外縁６ａが互いに連続した四個の突出部６ａＡと四個の凹部６ａＢの組合せで構成されているが、この外縁６ａは、前記固定子空隙部１６内に出入りするように、その半径方向に周期的に大きさが変化する形状、例えば、周知のハート型、三葉、四葉型等の形状とし、この磁性体回転子６の回転により前記各板１０，１５と鎖交する面積が変化し、周知のように、前記検出巻線１４に誘起電圧からなるレゾルバ信号を得ることができる。
The magnetic rotor 6 is formed of a plate body whose outer edge 6 a periodically changes in the radial direction or the radial direction of the stator common lower plate 10 and is located in the stator gap portion 16. Yes.
In FIG. 1, the outer edge 6a is composed of a combination of four projecting portions 6aA and four recessed portions 6aB which are continuous with each other. However, the outer edge 6a enters and exits the stator gap portion 16. In addition, the shape is periodically changed in the radial direction, for example, a known heart shape, a trilobal shape, a quadrilobal shape, or the like. As is well known, a resolver signal made up of an induced voltage can be obtained in the detection winding 14 as is known.
従って、前記磁性体回転子６は、巻線を有しない周知のバリアブルリアクタンス型（ＶＲ型）レゾルバを構成している。
また、前記磁性体回転子６が真円で形成されている場合は、前記回転軸２０に対して偏芯させることにより、前述と同様の作用効果を得ることができる。
Therefore, the magnetic rotor 6 constitutes a known variable reactance type (VR type) resolver having no winding.
Further, when the magnetic rotor 6 is formed in a perfect circle, the same effect as described above can be obtained by decentering the rotating shaft 20.
従って、前述の本発明の構成によれば、従来構成のように、軸振れが発生した場合でも、固定子空隙部１６の隙間が固定されているため、高精度の角度検出を行うことができる。
また、前記磁性体回転子６の回転に伴う角度情報は、固定子共通下部板１０上の固定子上部板１５と、磁性体回転子６の鎖交する量に依存するため、回転軸２０の振れによる誤差の発生を防止することができる。
Therefore, according to the configuration of the present invention described above, even when shaft runout occurs as in the conventional configuration, the gap of the stator gap portion 16 is fixed, so that highly accurate angle detection can be performed. .
In addition, the angle information associated with the rotation of the magnetic rotor 6 depends on the amount of linkage between the stator upper plate 15 on the stator common lower plate 10 and the magnetic rotor 6. It is possible to prevent occurrence of errors due to shake.
また、前記各固定子上部板１５は、電気的には固定子共通下部板１０を介して一体化するが、磁気的には互いに分離して分割配置されているため、対向する他の回転子からの検出信号成分が遮断され、検出精度を向上させることができる。 Each stator upper plate 15 is electrically integrated via the stator common lower plate 10, but magnetically separated from each other, so that the other rotors facing each other are separated. The detection signal component from is cut off, and the detection accuracy can be improved.
５ ステータ
６ 磁性体回転子
６ａ 外縁
６ａＡ 突出部
６ａＢ 凹部
１０ 固定子共通下部板
１１ 周縁部
１２ 巻線磁芯
１３ 励磁巻線
１４ 検出巻線
１５ 固定子上部板
１６ 固定子空隙部
２０ 回転軸
２１ 軸孔
DESCRIPTION OF SYMBOLS 5 Stator 6 Magnetic body rotor 6a Outer edge 6aA Protrusion part 6aB Concave part 10 Stator common lower board 11 Peripheral part 12 Winding magnetic core 13 Excitation winding 14 Detection winding 15 Stator upper board 16 Stator space | gap 20 Rotating shaft 21 Shaft hole
Claims (2)
前記磁性体回転子(6)を回転させることにより、前記磁性体回転子(6)の前記外縁(6a)が前記固定子空隙部(16)内で前記固定子共通下部板(10)の半径方向に沿って変化する構成としたことを特徴とする角度検出器。 A stator common lower plate (10) formed of a plate made of a magnetic material, and a plurality of windings provided periodically or aperiodically along the peripheral edge (11) of the stator common lower plate (10). A wire winding core (12), a stator winding (4) comprising an excitation winding (13) and a detection winding (14) provided on each winding core (12), and each winding core (12) A plurality of stator upper plates (15) disposed opposite to the stator common lower plate (10), the stator common lower plate (10), and each stator upper plate (15). A plurality of stator gaps (16) formed between and a rotation shaft (21) rotatably provided in a shaft hole (21) formed at the axial center position of the stator common lower plate (10). 20) and eccentricity provided on the rotating shaft (20) or its outer edge (6a) is periodically changed in the radial direction, and the outer edge (6a) is provided in each stator gap (16). A plate-shaped magnetic rotor (6) positioned rotatably, and
By rotating the magnetic rotor (6), the outer edge (6a) of the magnetic rotor (6) has a radius of the stator common lower plate (10) in the stator gap (16). An angle detector characterized by being configured to change along a direction.
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| JP2006310273A JP4862122B2 (en) | 2006-11-16 | 2006-11-16 | Angle detector |
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