CN111245163A - Angle resolver fixing mechanism and motor thereof - Google Patents
Angle resolver fixing mechanism and motor thereof Download PDFInfo
- Publication number
- CN111245163A CN111245163A CN201811434880.8A CN201811434880A CN111245163A CN 111245163 A CN111245163 A CN 111245163A CN 201811434880 A CN201811434880 A CN 201811434880A CN 111245163 A CN111245163 A CN 111245163A
- Authority
- CN
- China
- Prior art keywords
- resolver
- motor
- rotor
- stator
- fixed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/21—Devices for sensing speed or position, or actuated thereby
- H02K11/215—Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
- H02K1/30—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures using intermediate parts, e.g. spiders
Abstract
The invention provides a resolver fixing mechanism and a motor thereof. The bottom shell is provided with a supporting part and a flange part; the support portion has a through hole penetrating the central axis, the flange portion extends to the support portion, and the flange portion has a protruding base. The resolver stator is fixed to the base. The magnetic conductive cover plate is provided with a fixing part and a shielding part. The fixing part is fixed between the resolver stator and the base, and a non-magnetic gasket is arranged between the resolver stator and the fixing part. The shielding part extends to the fixing part and extends towards the central axis. By means of the shielding part, the magnetic force lines of the coil are prevented from converging in the resolver assembly, and therefore the probability of error of the resolver signal is reduced.
Description
Technical Field
The present invention relates to a resolver of a motor, and more particularly, to a resolver fixing mechanism and a motor thereof.
Background
When the motor of the electric vehicle or the oil-electric vehicle runs, the system needs to accurately master the output state of the motor, particularly the rotating speed of the motor, so as to ensure the normal operation of the motor and issue a correct control instruction.
The motor speed is detected with a resolver, the rotor and stator of which are usually arranged in the motor housing. Wherein the stator is fixed to the housing and the rotor is fixed to the spindle or the motor rotor. However, strong magnetic fields are generated in either the motor rotor or the motor stator. And the output signal of the resolver is a sine wave signal. The sinusoidal signal is susceptible to strong magnetic field interference, resulting in distortion with noise. Once the sine wave signal is distorted, the system will determine the motor operation error, and force the motor to shut down. If the motor is shut down due to a mistake during the running of the automobile, the automobile loses power momentarily and danger may occur.
Disclosure of Invention
In view of the above problems, the present invention provides a resolver fixing mechanism applied to a motor. The resolver fixing mechanism can avoid the resolver from being interfered by the magnetic field change generated when the motor operates, and avoid the system from powering off and shutting down the motor due to the error signal generated in the motor rotating speed detection operation.
The invention provides a resolver fixing mechanism which comprises a bottom shell, a resolver stator and a magnetic conduction cover plate. The bottom shell is provided with a supporting part and a flange part; the support portion has a through hole penetrating the central axis, the flange portion extends to the support portion, and the flange portion has a protruding base. The resolver stator is fixed to the base. The magnetic conduction cover plate is provided with a fixing part and a shielding part; the fixing part is fixed between the resolver stator and the base, and a non-magnetic gasket is arranged between the resolver stator and the fixing part; the shielding part extends to the fixing part and extends towards the central axis.
Based on the resolver fixing mechanism, the present invention provides a motor, which includes the resolver fixing mechanism, the motor stator, the spindle, the motor rotor, and the resolver rotor. The motor stator is provided with a coil fixing frame and a plurality of coils; the coil fixing frame is provided with an annular winding groove, and the coils are fixed on the coil fixing frame in a concentrated winding mode. The mandrel is arranged in the supporting part in a penetrating way. The motor rotor is arranged on the mandrel and is positioned in the annular winding groove. The resolver rotor is fixed on the motor rotor; the distance between the resolver stator and the central axis is greater than that between the resolver rotor and the central axis, and the shielding part is shielded between the bottom shell and the resolver rotor.
The invention further provides a resolver fixing mechanism, which comprises a bottom shell, a resolver stator and a magnetism isolating ring. The bottom shell is provided with a supporting part and a flange part; the support portion has a through hole penetrating the central axis, the flange portion extends to the support portion, and the flange portion has a protruding base. The resolver stator is fixed to the base. One wall surface of the magnetism isolating ring is positioned on the outer side of the resolver stator.
Based on the resolver fixing mechanism, the present invention further provides a motor, which includes the resolver fixing mechanism, the motor stator, the spindle, the motor rotor, and the resolver rotor. The motor stator is provided with a coil fixing frame and a plurality of coils; the coil fixing frame is provided with an annular winding groove, and the plurality of coils are fixed on the coil fixing frame in a concentrated winding mode. The mandrel is arranged in the supporting part in a penetrating way. The motor rotor is arranged on the mandrel and is positioned in the annular winding groove. The resolver rotor is fixed on the motor rotor; the distance between the resolver stator and the central axis is greater than that between the resolver rotor and the central axis, and the shielding part is shielded between the bottom shell and the resolver rotor.
The invention avoids the magnetic line of force of the coil from converging to the resolver stator or the resolver rotor and avoids the signal receiving and sending of the resolver stator or the resolver rotor from being interfered by the coil in a mode of adding a magnetic conduction cover plate or a magnetism isolating ring without changing the configuration of the resolver stator and the resolver rotor and modifying the existing motor structure. Therefore, the resolver fixing structure can be quickly combined in the existing motor design without redesigning the motor structure.
Drawings
Fig. 1 is a perspective view of a resolver fixing mechanism and a motor thereof according to a first embodiment of the present invention.
Fig. 2 is an exploded view of the resolver fixing mechanism and its motor of the first embodiment of the invention.
Fig. 3 is a schematic sectional view of the resolver fixing mechanism and the motor thereof according to the first embodiment of the present invention.
Fig. 4 is a schematic sectional view of part of elements in the resolver fixing mechanism according to the first embodiment of the present invention.
Fig. 5 is an exploded view of the resolver fixing mechanism and a motor thereof according to the second embodiment of the present invention.
Fig. 6 is a schematic sectional view of part of elements in a resolver fixing mechanism according to a second embodiment of the invention.
Fig. 7 is an exploded view of a resolver fixing mechanism and a motor thereof according to a third embodiment of the present invention.
Fig. 8 is a schematic sectional view of part of elements in a resolver fixing mechanism according to a third embodiment of the invention.
Wherein the reference numerals are:
100 motor 110 bottom shell
112 support portion 114 flange portion
116 through the hole 118 base
120 motor stator 122 coil fixing frame
124 coil 126 ring winding slot
130 spindle 140 motor rotor
142 annular sidewall 144 rotor liner
145 reduction gear segment 146 permanent magnet element
148 receptacle 152 resolver rotor
154 resolver stator 160 magnetic conductive cover plate
162 fixed part 164 shielding part
166 non-magnetic conducting spacer 170 magnetism isolating ring
L central axis
Detailed Description
Referring to fig. 1, fig. 2 and fig. 3, a resolver fixing mechanism according to a first embodiment of the disclosure is applied to a motor 100. The motor 100 has a bottom shell 110, a motor stator 120, a spindle 130, a motor rotor 140, a resolver assembly, and a magnetically conductive cover plate 160.
As shown in fig. 1 and 2, the bottom shell 110 has a supporting portion 112 and a flange portion 114. The support portion 112 is cylindrical and has a through hole 116 penetrating a central axis L, and the spindle 130 is inserted into the support portion 112 through the through hole 116. The flange portion 114 extends from the support portion 112 to form a disk-like structure.
As shown in fig. 1, 2 and 3, the motor stator 120 has a coil fixing frame 122 and a plurality of coils 124. The coil fixing frame 122 is annular and has an annular winding slot 126. The plurality of coils 124 are fixed to the coil holder 122 in a concentrated winding manner. The winding axis of the coil 124 is perpendicular to the central axis L of the annular winding groove 126. The plurality of coils 124 are spaced apart to provide alternating magnetic fields.
As shown in fig. 1 and 2, in one embodiment, the motor rotor 140 has a rotor bushing 144, the rotor bushing 144 includes an annular sidewall 142 structure and a reduction gear segment 145 structure, and the annular sidewall 142 and the reduction gear segment 145 are integrally formed with the rotor bushing 144. An annular sidewall 142 is structurally disposed around the rotor liner 144. The reduction gear segment 145 extends from the rotor bushing 144, or the reduction gear segment 145 is formed on the outer surface of the rotor bushing 144 such that the reduction gear segment 145 is coupled to the rotor bushing 144. The motor rotor 140 is integrally formed such that the rotor bushing 144 is movably sleeved on the spindle 130, and the motor rotor 140 is rotatably disposed on the spindle 130 by positioning the straight gear surface of the reduction gear section 145 in the axial direction of the spindle 130.
As shown in fig. 1 and 2, the annular sidewall 142 is provided with a plurality of permanent magnetic elements 146 on the outer peripheral surface thereof, and the permanent magnetic elements 146 are disposed on the outer peripheral surface at intervals. The reduction gear section 145 is adapted to be coupled to a reduction gear assembly to output power generated by the rotation of the motor rotor 140.
As shown in fig. 2, 3 and 4, the resolver assembly includes a resolver rotor 152 and a resolver stator 154. The reduction gear section 145 and the spindle 130 are not shown in fig. 3 for simplicity of illustration. The resolver rotor 152 is fixed to the rotor bushing 144 and thus to the motor rotor 140 so that the resolver rotor 152 and the motor rotor 140 can be rotated simultaneously. The resolver rotor 152 may be fixed to another portion of the motor rotor 140 as long as the resolver rotor 152 and the motor rotor 140 can rotate simultaneously. Further, the rotor bushing 144 partitions a side of the motor rotor 140 facing the bottom case 110 into a receiving portion 148, and the resolver stator 154 and the resolver rotor 152 are located in the receiving portion 148.
As shown in fig. 2, 3 and 4, the resolver stator 154 is fixed to the flange portion 114 of the bottom case 110. The flange portion 114 has a base 118 projecting toward the motor rotor 140, and the resolver stator 154 is fixed to the base 118 by fixing means such as bolts.
As shown in fig. 4, the resolver stator 154 is spaced apart from the central axis L by a distance greater than that of the resolver rotor 152. One embodiment of the resolver assembly is a Hall sensor, and the resolver rotor 152 may pass through the side of the resolver stator 154 once every turn around the central axis L, so as to generate a Hall effect. The rotation speed of the motor rotor 140 (i.e., the rotation speed of the motor 100) can be obtained by a Hall effect. The resolver assembly is not excluded as another type of detection mechanism as long as the resolver stator 154 and the resolver rotor 152 are arranged as a signal emitting end and a signal receiving end, respectively.
As shown in fig. 3 and fig. 4, the magnetic conductive cover plate 160 has a fixing portion 162 and a shielding portion 164. The fixing portion 162 is fixed between the resolver stator 154 and the base 118, and a non-magnetic spacer 166 is disposed between the resolver stator 154 and the fixing portion 162, so that magnetic lines of force passing through the magnetic conductive cover plate 160 do not directly penetrate through the fixing portion 162 and enter the resolver stator 154. The shielding portion 164 extends from the fixing portion 162 and extends toward the central axis L to cover the accommodating portion 148 and shield the bottom shell 110 and the resolver rotor 152. In addition, the outer periphery of the shielding portion 164 has an extension extending to the outer side surface of the resolver stator 154 to be isolated between the resolver stator 154 and the annular side wall 142 of the motor rotor 140. One embodiment of the magnetically conductive cover plate 160 may be a cold-pressed steel plate, such as a steel plate according to JIS 3141 and 1996. One embodiment of the non-magnetic spacer 166 is bakelite or other plastic material.
As shown in fig. 4, the coil 124 is located outside the resolver stator 154 (not shown). When the coil 124 acts to generate a magnetic field change, the magnetic lines of force of the coil 124 are attracted by the magnetic conductive cover plate 160 and converge on the magnetic conductive cover plate 160, so as to reduce the density of the magnetic lines of force passing through the resolver stator 154 or the resolver rotor 152, thereby avoiding interference in signal transceiving of the resolver stator 154 or the resolver rotor 152 and further avoiding the problem of error detection of the rotation speed of the motor 100.
As shown in fig. 5 and fig. 6, a second embodiment of a resolver fixing mechanism according to the present invention is applied to a motor 100. The motor 100 has a bottom shell 110, a motor stator 120, a spindle 130, a motor rotor 140, a resolver assembly and a magnetism isolating ring 170.
As shown in fig. 5 and fig. 6, the difference between the second embodiment and the first embodiment is that the motor 100 of the second embodiment is not provided with the magnetic conductive cover plate 160, and the magnetism isolating ring 170 is added. As shown, the magnetism isolating ring 170 is made of a non-magnetic material, such as stainless steel, to isolate the magnetic lines of force. In one embodiment, the stainless steel is a stainless steel in accordance with JIS G4303: 2005.
As shown in fig. 5 and 6, the magnetism isolating ring 170 is fixed to the outer side of the resolver stator 154; in one embodiment, the outer ring portion of the resolver stator 154 is cut and then used to couple with the magnetism isolating ring 170. However, the magnetism isolating ring 170 may be located outside the resolver stator 154, and may isolate the permanent magnet element 146 and the coil 124 from the resolver stator 154 in the radial direction. Therefore, the magnetism isolating ring 170 may be fixed to the motor rotor 140 or the rotor bushing 144 of the motor rotor 140.
As shown in the drawings, in another embodiment, the magnetism isolating ring 170 is fixed inside the annular sidewall 142 to be embedded in the annular sidewall 142.
When the coil 124 acts to generate a magnetic field change, the magnetic lines of force of the coil 124 are blocked by the magnetism isolating ring 170 and are dispersed towards the two ends of the central axis L, so that the magnetic lines of force are prevented from converging to the resolver stator 154 or the resolver rotor 152, the density of the magnetic lines of force passing through the resolver stator 154 or the resolver rotor 152 is reduced, the interference of the magnetic lines of force on the signal receiving and sending of the resolver stator 154 or the resolver rotor 152 is avoided, and the problem of error detection of the rotating speed of the motor 100 is further avoided.
Referring to fig. 7 and 8, a third embodiment of a resolver fixing mechanism according to the present invention is applied to a motor 100. The motor 100 has a bottom case 110, a motor stator 120, a spindle 130, a motor rotor 140, a resolver assembly, a magnetic conductive cover plate 160, and a magnetism isolating ring 170.
As shown in fig. 7 and 8, the third embodiment mainly combines the magnetically conductive cover plate 160 of the first embodiment and the magnetism isolating ring 170 of the second embodiment into the same motor 100. Therefore, when the coil 124 acts to generate a magnetic field change, the magnetic lines of force of the coil 124 are blocked by the magnetism isolating ring 170 and are spread towards the two ends of the central axis L, so as to avoid the magnetic lines of force from converging on the resolver stator 154 or the resolver rotor 152; the magnetic flux lines still converging toward the resolver stator 154 or the resolver rotor 152 are attracted by the magnetic conductive cover plate 160 to converge on the magnetic conductive cover plate 160; therefore, the magnetic conductive cover plate 160 and the magnetism isolating ring 170 are configured at the same time, so that the magnetic line density passing through the resolver stator 154 or the resolver rotor 152 can be reduced more effectively, the signal receiving and transmitting of the resolver stator 154 or the resolver rotor 152 are prevented from being interfered, and the problem of error in detecting the rotating speed of the motor 100 is further prevented.
The present invention does not change the configuration of the resolver stator 154 and the resolver rotor 152, or modify the structure of the conventional motor 100, but adds the magnetic conductive cover plate 160 or the magnetism isolating ring 170 to prevent the magnetic lines of force of the coil 124 from converging on the resolver stator 154 or the resolver rotor 152, thereby preventing the signal transceiving of the resolver stator 154 or the resolver rotor 152 from being interfered. Thus, the resolver fixing structure can be quickly incorporated into an existing motor 100 design without redesigning the motor 100 structure.
Claims (20)
1. A resolver fixing mechanism, comprising:
a bottom shell having a supporting portion and a flange portion; the supporting part is provided with a through hole penetrating through a central axis, the flange part extends to the supporting part and is provided with a protruding base;
the resolver stator is fixed on the base; and
a magnetic conductive cover plate having a fixing part and a shielding part; the fixing part is fixed between the resolver stator and the base, and a non-magnetic gasket is arranged between the resolver stator and the fixing part; the shielding part extends to the fixing part and extends towards the central axis.
2. The resolver fixing mechanism according to claim 1, further comprising a magnetism isolating ring, wherein a wall surface of the magnetism isolating ring is located outside the resolver stator.
3. The resolver fixing mechanism according to claim 1, wherein the outer peripheral edge of the shielding portion has an extension extending to the outer side face of the resolver stator.
4. The resolver fixing mechanism according to claim 1, wherein the non-magnetic spacer is made of bakelite or plastic.
5. A motor, comprising:
a resolver fixing mechanism as claimed in claim 1 or claim 2;
a motor stator having a coil fixing frame and a plurality of coils; the coil fixing frame is provided with an annular winding groove, and the coils are fixed on the coil fixing frame in a concentrated winding mode;
a mandrel, which is arranged through the supporting part;
a motor rotor arranged on the mandrel and positioned in the annular winding groove; and
the resolver rotor is fixed on the motor rotor; the distance between the resolver stator and the central axis is greater than that between the resolver rotor and the central axis, and the shielding part shields the bottom shell and the resolver rotor.
6. The motor as claimed in claim 5, wherein the winding axis of each of the coils is perpendicular to the central axis, and the plurality of coils are disposed at intervals.
7. The motor of claim 5, wherein the motor rotor has a rotor bushing and a reduction gear section coupled to the rotor bushing.
8. The motor of claim 7, wherein the resolver rotor is fixed to the rotor bushing and thereby to the motor rotor.
9. The motor of claim 7, wherein the rotor bushing has an annular sidewall disposed around the rotor bushing.
10. The motor as claimed in claim 9, wherein the annular sidewall has a plurality of permanent magnet elements disposed on an outer peripheral surface thereof, and the plurality of permanent magnet elements are disposed on the outer peripheral surface at intervals.
11. A resolver fixing mechanism, comprising:
a bottom shell having a supporting portion and a flange portion; the supporting part is provided with a through hole penetrating through a central axis, the flange part extends to the supporting part and is provided with a protruding base;
the resolver stator is fixed on the base; and
and the wall surface of the magnetism isolating ring is positioned at the outer side of the resolver stator.
12. The resolver fixing mechanism according to claim 11, wherein the magnetism isolating ring is made of a non-magnetic conductive material.
13. A motor, comprising:
a resolver fixing mechanism according to claim 11;
a motor stator having a coil fixing frame and a plurality of coils; the coil fixing frame is provided with an annular winding groove, and the coils are fixed on the coil fixing frame in a concentrated winding mode;
a mandrel, which is arranged through the supporting part;
a motor rotor arranged on the mandrel and positioned in the annular winding groove; and
the resolver rotor is fixed on the motor rotor; the distance between the resolver stator and the central axis is greater than that between the resolver rotor and the central axis.
14. The motor of claim 13, wherein the winding axis of each coil is perpendicular to the central axis, and the plurality of coils are spaced apart.
15. The motor of claim 13, wherein the motor rotor has a rotor bushing and a reduction gear section coupled to the rotor bushing.
16. The motor of claim 15, wherein the resolver rotor is fixed to the rotor bushing and thereby to the motor rotor.
17. The motor of claim 15, wherein the rotor bushing has an annular sidewall disposed around the rotor bushing.
18. The motor as claimed in claim 17, wherein the annular sidewall has a plurality of permanent magnet elements disposed on an outer peripheral surface thereof, and the plurality of permanent magnet elements are disposed on the outer peripheral surface at intervals.
19. The motor as claimed in claim 17, wherein the magnetism isolating ring is located between the resolver stator and the annular side wall.
20. The motor as claimed in claim 19, wherein the magnetism isolating ring is fixed to the motor rotor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811434880.8A CN111245163A (en) | 2018-11-28 | 2018-11-28 | Angle resolver fixing mechanism and motor thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811434880.8A CN111245163A (en) | 2018-11-28 | 2018-11-28 | Angle resolver fixing mechanism and motor thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111245163A true CN111245163A (en) | 2020-06-05 |
Family
ID=70873966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811434880.8A Pending CN111245163A (en) | 2018-11-28 | 2018-11-28 | Angle resolver fixing mechanism and motor thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111245163A (en) |
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| US20150311771A1 (en) * | 2013-01-04 | 2015-10-29 | Controlled Power Technologies Ltd | Position sensing system |
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| CN108521197A (en) * | 2018-05-30 | 2018-09-11 | 广东威灵电机制造有限公司 | Motor and refrigeration equipment |
| CN108880013A (en) * | 2017-05-08 | 2018-11-23 | 美蓓亚三美株式会社 | Stator structure and rotary transformer |
| CN208986778U (en) * | 2018-11-28 | 2019-06-14 | 华擎机械工业股份有限公司 | Resolver fixed mechanism and its motor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1744411A (en) * | 2004-03-22 | 2006-03-08 | 通用汽车公司 | Motor resolver assemble and method for measuring rotor speed and position |
| CN103312090A (en) * | 2012-03-06 | 2013-09-18 | 大银微系统股份有限公司 | Motor structure provided with resolver |
| TWM437572U (en) * | 2012-03-07 | 2012-09-11 | Hiwin Mikrosystem Corp | Motor structure with resolver |
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| PB01 | Publication | ||
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Application publication date: 20200605 |