Electric machine having first angle sensor
By designing the first angle sensor and the second angle sensor in the motor, and using the grille port of the fan hood grille to connect with the clamping mechanism, the safety and cost problems of the existing motor are solved, and the reliable connection of the angle sensor and the safety of the motor are improved.
Patent Information
- Application Number
- CN202311842629.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-28
- Publication Date
- 2025-07-01
AI Technical Summary
Existing motors have high costs and unstable connection problems in improving safety, especially in connection with torque support members of angle sensors.
A motor is designed, adopting a first angle sensor and a second angle sensor, and is connected to the clamping mechanism through the grille of the fan hood grille, so as to realize a reliable connection of the torque support member of the angle sensor.
Through mechanical decoupling and redundant angle determination, the motor safety is improved, and the cost is reduced, ensuring reliable connection and operation of the angle sensor.
Smart Images
Figure CN120237879A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to an electric motor having a first angle sensor. Background Art
[0002] As is well known, an angle sensor is used to determine the rotational position of the rotor shaft of an electric motor. Summary of the Invention
[0003] Therefore, the object of the present invention is to improve an electric motor, wherein an increased safety should be achievable simply and at low cost.
[0004] According to the present invention, this object is achieved by an electric motor according to the features given in claim 1.
[0005] An important feature of the present invention in terms of the electric motor is that the electric motor is provided with a first angle sensor,
[0006] wherein the electric motor has a blower housing that surrounds the blower of the electric motor, in particular surrounds the blower of the electric motor in a manner forming a housing,
[0007] wherein the blower sucks in an air flow through a grille opening of a blower housing grille and conveys the air flow towards the stator housing of the electric motor,
[0008] wherein a connecting plate projects radially on the housing of the first angle sensor, and the connecting plate is connected to a clamping mechanism by a plate member,
[0009] wherein the clamping mechanism is pressed into the grille opening of the blower housing grille.
[0010] The advantage here is that a reliable connection of the torque support of the angle sensor is achieved.
[0011] Thus, in particular, the electric motor can even be designed to have two angle sensors, and the torque supports of these angle sensors lead to the blower housing independently of each other. This causes a mechanical decoupling of the two angle determinations and thus an increased safety is achieved.
[0012] In an advantageous design, the clamping mechanism has an arched connecting region that is pressed into the grille opening,
[0013] wherein a bolt passes through an orifice of the plate member and is screwed into the clamping mechanism. The advantage here is that the cross-section of the arched connecting region can be matched to the cross-section of the grille opening, and thus a reliable connection can be achieved.
[0014] In an advantageous design, the plate member has an oblong hole, and the bolt passes through the oblong hole and also through an orifice of the connecting plate of the housing of the first angle sensor. The advantage here is that dimensional adaptation can be achieved, and thus stress can be prevented. Thereby a reliable connection can be achieved.
[0015] In an advantageous design, the first angle sensor is a hollow shaft encoder,
[0016] wherein the rotor shaft of the electric machine or a shaft component connected to the rotor shaft of the electric machine in a non-rotatable manner passes through the hollow shaft of the first angle sensor. The advantage here is that a simple and reliable connection and operation can be achieved.
[0017] In an advantageous design, the electric machine has a second angle sensor,
[0018] wherein at least one connecting plate projects radially on the housing of the second angle sensor, and the at least one connecting plate is connected to an annular intermediate plate, in particular by means of bolts passing through the connecting plate and the intermediate plate.
[0019] wherein the annular intermediate plate has two radially projecting radiation regions, and on each of the radiation regions, a respective bolt is fixed, and the bolt is connected to the blower housing grille on its axially remote side from the annular intermediate member. The advantage here is that redundant angle determination can be achieved.
[0020] In an advantageous design, the bolt head of the bolt screwed into the bolt presses the blower housing grille against the step of the bolt. The advantage here is that a reliable connection can be achieved.
[0021] In an advantageous design, the second angle sensor is a hollow shaft encoder,
[0022] wherein the rotor shaft of the electric machine or a shaft component connected to the rotor shaft of the electric machine in a non-rotatable manner extends into the hollow shaft of the second angle sensor. The advantage here is that cost-effective and simple manufacturing can be implemented by using two structurally identical angle sensors, and the structurally identical angle sensors allow redundant angle determination.
[0023] In an advantageous design, the region axially covered by the respective bolt includes the region axially covered by the first angle sensor. The advantage here is that for the torque support of the second angle sensor, the bolt can axially bridge the first angle sensor.
[0024] In an advantageous design, the rotor shaft or a shaft component connected to the rotor shaft in a non-rotatable manner passes through the annular opening of the annular intermediate plate. The advantage here is that the intermediate plate can achieve an axially spaced arrangement of the second angle sensor.
[0025] In an advantageous design, the cover connected to the fan housing surrounds the first angle sensor and the second angle sensor, in particular in such a way as to form a housing around the first angle sensor and the second angle sensor. The advantage here is that safe and protected operation can be achieved.
[0026] In an advantageous design, the clamping mechanism is arranged radially outside the first angle sensor. The advantage here is that the plate can be used for radial bridging.
[0027] In an advantageous design, the bolt is arranged radially outside the second angle sensor. The advantage here is that the intermediate plate can be used for radial bridging.
[0028] In an advantageous design, the ring axis of the annular intermediate plate is coaxial with the rotational axis of the rotor shaft. The advantage here is that the intermediate plate is symmetrically oriented.
[0029] In an advantageous design, the net inner diameter of the annular opening is smaller than the outer diameter of the first angle sensor. The advantage here is that the first angle sensor and the second angle sensor are arranged in a reliably separated manner.
[0030] In an advantageous design, the first angle sensor and the second angle sensor are constructed identically, in particular in the same way. The advantage here is that redundant operation of the angle sensors can be achieved in a simple and reliable manner.
[0031] Further advantages are given by the dependent claims. The invention is not limited to the feature combinations of the claims. For a person skilled in the art, other reasonable combination possibilities of the claims and / or single claim features and / or features of the description and / or features of the drawings can be obtained, in particular from the purpose stated and / or by comparison with the prior art. Description of the Drawings
[0032] The invention will now be explained in detail with reference to the schematic drawings:
[0033] In Figure 1 a cut-away view of a region of an electric machine according to the invention is shown.
[0034] In Figure 2 a perspective view of said region is shown.
[0035] In Figure 3 a perspective view of the fan housing 3 of the electric machine is shown.
[0036] In Figure 4 a perspective view of the plate 20 of the electric machine is shown.
[0037] In Figure 5 a perspective view of the first angle sensor 1 of the electric machine is shown.
[0038] In Figure 6 shows a perspective view of the annular intermediate plate of the electric machine.
[0039] In Figure 7 shows a perspective view of the cover 6 of the electric machine.
[0040] List of reference numerals:
[0041] 1 First angle sensor
[0042] 2 Second angle sensor
[0043] 3 Fan cover
[0044] 4 Bolt
[0045] 5 Intermediate plate
[0046] 6 Cover
[0047] 20 Plate member
[0048] 21 Connecting plate of the housing of the first angle sensor 1
[0049] 22 Connecting plate of the housing of the second angle sensor 2 Detailed description
[0050] As shown in the figure, the electric machine has a fan cover 3, which is fixed to the bearing cover of the electric machine. The bearing cover accommodates a bearing for rotatably supporting the rotor shaft of the electric machine. The bearing cover is connected to the stator housing, and the stator housing is connected to a bearing flange on its axially bearing cover-facing side. The bearing flange has another bearing for rotatably supporting the rotor shaft.
[0051] The fan cover 3 surrounds the fan, which sucks in air flow through the fan cover grille of the fan cover 3 and conveys the air flow along the stator housing.
[0052] The fan cover grille has grille openings, which are configured as a two-dimensional grille with a grille pitch on the fan cover 3.
[0053] The first angle sensor 1 is designed as a hollow shaft sensor. The housing of the first angle sensor 1 has a connecting plate 21 that protrudes radially on the first angle sensor 1. The connecting plate is connected to the plate member 20, in particular by means of a bolt that protrudes through an oblong hole in the plate member 20, and a nut is screwed onto the bolt.
[0054] The plate member 20 has two through holes, and threaded members screwed into the clamping mechanism pass through the through holes.
[0055] The clamping mechanism has arched connecting regions which are pressed into the grid openings of the fan housing grille of the fan housing 3. Thus, the clamping mechanism is form-fittingly connected to the fan housing 3 in the radial direction and in the circumferential direction and is force-fittingly connected in the axial direction.
[0056] The axial direction is parallel to the axis of rotation of the rotor shaft. The radial direction and the circumferential direction are each referenced to the axis of rotation of the rotor shaft.
[0057] These threaded components press the plate 20 against the clamping mechanism.
[0058] The second angle sensor 2 is also designed as a hollow shaft encoder and is arranged on the axially stator housing-facing side of the first angle sensor 1.
[0059] Preferably, the first angle sensor 1 is constructed identically, in particular the same, as the second angle sensor 2.
[0060] On the housing of the second angle sensor 2, a connecting plate 22 is formed which also projects radially and is connected to the annular intermediate plate.
[0061] The second angle sensor 2 passes through the ring opening of the annular intermediate plate. On the annular intermediate plate, a radially projecting radiation region is formed, on which bolts 4 are fixed, which are fixed to the fan housing grille, in particular by means of corresponding bolts.
[0062] For this purpose, in each of the bolts 4, a bolt is screwed in, and the bolt head of the bolt presses the fan housing grille against the bolt 4.
[0063] The rotor shaft passes through the first angle sensor 1 and the second angle sensor 2 and is non-rotatably connected to the respective hollow shafts of the two angle sensors 1, 2.
[0064] The region covered by the bolts 4 in the axial direction includes the region covered by the first angle sensor 1 in the axial direction.
[0065] The cover 6 protects the two angle sensors 1, 2 and is connected to the fan housing 3.
Claims
1. A motor having a first angle sensor, The electric machine has a fan guard which surrounds a fan of the electric machine, in particular forms a housing of the fan. The fan draws in air through the grille openings of the fan grille of the fan grille and conveys the air toward the stator housing of the motor. It is characterized in that A connecting plate protrudes radially from the housing of the first angle sensor, and the connecting plate is connected to the clamping mechanism through a plate member. The clamping mechanism is pressed into the grille opening of the fan guard grille.
2. The motor according to claim 1, It is characterized in that The clamping mechanism has a curved connecting area which is pressed into the grille opening. The bolts pass through the apertures in the plate and are screwed into the clamping mechanism.
3. An electric machine according to any one of the preceding claims, It is characterized in that The plate has an elongated hole through which a bolt passes. The bolt also passes through an opening of the connecting plate of the housing of the first angle sensor.
4. An electric machine according to any one of the preceding claims, It is characterized in that The first angle sensor is a hollow shaft encoder, The rotor shaft of the electric motor or a shaft component connected to the rotor shaft of the electric motor in a rotationally fixed manner passes through the hollow shaft of the first angle sensor.
5. An electric machine according to any one of the preceding claims, It is characterized in that The motor has a second angle sensor, At least one connecting plate protrudes radially from the housing of the second angle sensor, and the at least one connecting plate is connected to the annular intermediate plate, in particular by means of bolts penetrating the connecting plate and the intermediate plate. The annular intermediate plate has two radially protruding radiation areas, to each of which a corresponding bolt is fixed, which is connected to the fan guard grille on its side facing away from the annular intermediate plate in the axial direction.
6. An electric machine according to any one of the preceding claims, It is characterized in that The bolt heads of the bolts screwed into the bolts press the fan guard grille against the stepped portion of the bolts.
7. An electric machine according to any one of the preceding claims, It is characterized in that The second angle sensor is a hollow shaft encoder, The rotor shaft of the electric motor or a shaft component which is connected to the rotor shaft of the electric motor in a rotationally fixed manner projects into the hollow shaft of the second angle sensor.
8. An electric machine according to any one of the preceding claims, It is characterized in that The area covered by the corresponding bolt in the axial direction includes the area covered by the first angle sensor in the axial direction.
9. An electric machine according to any one of the preceding claims, It is characterized in that The rotor shaft or a shaft component connected to the rotor shaft in a rotationally fixed manner passes through the annular opening of the annular intermediate plate.
10. An electric machine according to any one of the preceding claims, It is characterized in that A cover which is connected to the fan guard surrounds the first angle sensor and the second angle sensor, in particular forms a housing of the first angle sensor and the second angle sensor.
11. An electric machine according to any one of the preceding claims, It is characterized in that The clamping mechanism is arranged radially outside the first angle sensor.
12. An electric machine according to any one of the preceding claims, It is characterized in that The bolt is arranged radially outside the second angle sensor.
13. The electric machine according to any one of the preceding claims, characterized in that, the ring axis of the annular intermediate plate is coaxial with the rotational axis of the rotor shaft.
14. The electric machine according to any one of the preceding claims, characterized in that, the net inner diameter of the ring opening is smaller than the outer diameter of the first angle sensor.
15. The electric machine according to any one of the preceding claims, characterized in that, the first angle sensor and the second angle sensor are constructed identically - in particular, the same.