CN108988516B - Motor and method for controlling motor to reduce noise - Google Patents
Motor and method for controlling motor to reduce noise Download PDFInfo
- Publication number
- CN108988516B CN108988516B CN201710405435.8A CN201710405435A CN108988516B CN 108988516 B CN108988516 B CN 108988516B CN 201710405435 A CN201710405435 A CN 201710405435A CN 108988516 B CN108988516 B CN 108988516B
- Authority
- CN
- China
- Prior art keywords
- motor
- connection
- external force
- stator core
- bolt
- 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.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000008859 change Effects 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 2
- 230000009467 reduction Effects 0.000 description 11
- 230000009471 action Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004870 electrical engineering Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- 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
- H02K1/12—Stationary parts of the magnetic circuit
-
- 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
- H02K11/02—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for suppression of electromagnetic interference
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Motor Or Generator Frames (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention provides a motor and a method for controlling the motor to reduce noise, wherein the motor comprises: the stator comprises a base, a stator core and at least two connecting pieces; each connecting piece is respectively connected with the base and the stator core, and the stator core is fixed in the base; the stiffness of each of said connectors is adjustable, said adjustability being achieved by external forces acting on any of said connectors. In this scheme, adjust the rigidity of the connecting piece of motor through external force, then can realize making an uproar the processing of falling to the motor, the implementation mode is more simple.
Description
Technical Field
The invention relates to the technical field of electrical engineering, in particular to a motor and a method for controlling the motor to reduce noise.
Background
Electromagnetic noise is one of the major sources of noise in electric machines. The direct cause of the electromagnetic noise is that when the motor is running, there are electromagnetic rotating force waves of specific frequency, and when the electromagnetic frequency of these force waves is the same as the mechanical frequency of the stator core vibrating at high frequency, high frequency electromagnetic resonance is generated, resulting in excessive electromagnetic noise.
At present, the stator core and the base of the motor are generally welded. Aiming at the existing motor, when the motor generates high-frequency electromagnetic resonance and causes overhigh electromagnetic noise, the motor needs to be disassembled, the electromagnetic scheme of the motor is redesigned to change the electromagnetic frequency of electromagnetic rotating force waves, and rotors with different groove numbers are replaced to realize noise reduction treatment on the motor, so that the treatment process is complex.
Disclosure of Invention
The embodiment of the invention provides a motor and a method for controlling the motor to reduce noise, which are more easy to realize the noise reduction treatment of the motor.
In a first aspect, an embodiment of the present invention provides a motor, including: the stator comprises a base, a stator core and at least two connecting pieces;
each connecting piece is respectively connected with the base and the stator core, and the stator core is fixed in the base;
the stiffness of each of said connectors is adjustable, said adjustability being achieved by external forces acting on any of said connectors.
Alternatively,
the connector, including: a bolt;
the outer wall of the stator core is provided with at least two connecting terminals, and each connecting terminal is provided with at least one threaded hole;
at least two through holes are formed in the base;
the at least two threaded holes correspond to the at least two through holes one to one;
and each bolt is screwed into the threaded hole corresponding to the current through hole through one through hole, the pretightening force corresponding to each bolt is adjustable, and the bolt is adjustable through external force acting on any bolt.
Alternatively,
the connector, further comprising: a spring washer; wherein the content of the first and second substances,
the bolt is located outside the base, and the spring washer is located between the base and the bolt.
Alternatively,
the at least two connection terminals include: at least two cylindrical protrusions;
the length direction of each cylindrical protrusion is parallel to the axial lead direction of the stator core;
at least two threaded holes which are linearly distributed are arranged on each cylindrical protrusion along the length direction of the cylindrical protrusion.
Alternatively,
the spacing distance between every two adjacent columnar protrusions is a first set distance;
and/or the presence of a gas in the gas,
on each cylindrical protrusion, the interval distance between every two adjacent threaded holes is a second set distance.
Alternatively,
the at least two connection terminals include: at least two annular protrusions;
the axial lead of each annular bulge is superposed with the axial lead of the stator core;
at least two threaded holes are formed in each annular protrusion along the circumferential direction of the annular protrusion.
In a second aspect, an embodiment of the present invention provides a method for controlling the motor in any one of the first aspect to reduce noise, including:
detecting whether the electromagnetic noise of the motor exceeds a first preset value;
applying at least one external force to the at least one connection of the motor to adjust the stiffness of the at least one connection when the electromagnetic noise of the motor exceeds a first preset threshold.
Alternatively,
when the at least one connection of the motor comprises at least one of the bolts,
the applying at least one external force to the at least one connection of the motor to adjust the stiffness of the at least one connection comprises:
and applying at least one external force to at least one bolt of the motor so as to drive each bolt subjected to the external force to be screwed into the corresponding threaded hole respectively.
Alternatively,
when the at least one connection of the motor comprises at least one of the bolts,
the applying at least one external force to the at least one connection of the motor to adjust the stiffness of the at least one connection comprises:
and applying at least one external force to at least one bolt of the motor so as to drive each bolt subjected to the external force to be screwed out of the corresponding threaded hole respectively.
Alternatively,
before the applying at least one external force to the at least one connector of the motor to adjust the stiffness of the at least one connector, further comprising:
detecting an amplitude of the stator core of the motor;
judging whether the amplitude reaches a second preset value or not,
if so, the applying at least one external force to the at least one connection of the motor to adjust the stiffness of the at least one connection comprises: applying at least one first external force to the at least one connection of the motor to increase the stiffness of the at least one connection;
otherwise, the applying at least one external force to the at least one connection of the motor to adjust the stiffness of the at least one connection comprises: applying at least one second external force to the at least one connection of the motor to change the stiffness of the at least one connection.
The embodiment of the invention provides a motor and a method for controlling the motor to reduce noise, wherein in the motor, a stator core and a base are respectively connected through a plurality of connecting pieces so as to fix the stator core in the base, and the rigidity of the stator core is related to the rigidity of each connecting piece; because the rigidity of each connecting piece is adjustable, when the motor causes overhigh electromagnetic noise due to high-frequency electromagnetic resonance, the rigidity of the stator core can be adjusted by adjusting the rigidity of at least one connecting piece through external force, so that the mechanical frequency of the stator core is changed, and the high-frequency electromagnetic resonance is eliminated to reduce the noise. Therefore, when the motor generates high-frequency electromagnetic resonance and causes overhigh electromagnetic noise, the motor does not need to be disassembled, a new electromagnetic scheme is designed, rotors with different groove numbers are not needed to be replaced, the rigidity of at least one connecting piece of the motor is only needed to be adjusted through at least one external force, and the noise reduction treatment of the motor is more easily realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of an electric machine provided by one embodiment of the present invention;
FIG. 2 is a schematic view of an electric machine provided in accordance with another embodiment of the present invention;
FIG. 3 is a schematic view of the assembly of a spring washer and a bolt in a motor according to an embodiment of the present invention;
fig. 4 is a schematic view of the installation between a cylindrical protrusion and a stator core in a motor according to an embodiment of the present invention;
fig. 5 is a schematic view illustrating the installation between the circular protrusion and the stator core in the motor according to an embodiment of the present invention;
FIG. 6 is a flow chart of a method for controlling a motor to reduce noise according to an embodiment of the present invention;
fig. 7 is a flowchart of a method for controlling a motor to reduce noise according to another embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer and more complete, the technical solutions in the embodiments of the present invention will be described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention, and based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the scope of the present invention.
As shown in fig. 1, the present invention provides a motor including: a base 10, a stator core 20, and at least two connecting members 30;
each of the connectors 30 is connected to the base 10 and the stator core 20, respectively, to fix the stator core 20 in the base 10;
the stiffness of each of the connecting members 30 is adjustable by an external force applied to any one of the connecting members 30.
In the motor provided by the embodiment of the invention, the stator core 20 and the base 10 are respectively connected through the plurality of connecting pieces 30 to fix the stator core 20 in the base 10, and the rigidity of the stator core 20 is associated with the rigidity of each connecting piece 30; because the rigidity of each connecting piece 30 is adjustable, when the motor has overhigh electromagnetic noise due to high-frequency electromagnetic resonance, the rigidity of at least one connecting piece 30 can be adjusted through external force to adjust the rigidity of the stator core 20, so that the mechanical frequency of the stator core 20 is changed, and the high-frequency electromagnetic resonance is eliminated to reduce the noise. Therefore, when the motor generates high-frequency electromagnetic resonance and causes overhigh electromagnetic noise, the motor does not need to be disassembled, a new electromagnetic scheme is designed, rotors with different groove numbers are not needed to be replaced, the rigidity of at least one connecting piece 30 of the motor is only needed to be adjusted through at least one external force, and the noise reduction treatment of the motor is more easily realized.
In one embodiment of the present invention, as shown in fig. 2, the connecting member 30 includes: a bolt 301; at least two connecting terminals 40 are arranged on the outer wall of the stator core 20, and each connecting terminal 40 is provided with at least one threaded hole 403; at least two through holes 101 are formed in the base 10; at least two threaded holes 403 correspond to at least two through holes 101 one by one; each bolt 301 is screwed into the threaded hole 403 corresponding to the current through hole 101 through one through hole 101, the pretightening force corresponding to each bolt 301 is adjustable, and the adjustability is realized through an external force acting on any bolt 301.
In this embodiment, by providing at least two connection terminals 40 having screw holes 403 on the outer wall of the stator core 20 and providing at least two through holes 101 corresponding to the respective screw holes 403 on the base 10, the fixing of the stator core 20 in the base 10 can be achieved using bolts 301 as the connection members 30.
When the stator core 20 is fixed inside the base 10 by at least two bolts 301, each bolt 301 receives a pre-tightening force applied to it by the stator core 20 and the base 10, and the pre-tightening force received by any bolt 301 is in a direct proportion relation with the distance that it is screwed into the threaded hole 403. Correspondingly, when any bolt 301 is subjected to an external force and continues to be screwed into the threaded hole 403 corresponding to the bolt 301, the pretightening force applied to the stator core 20 and the base 10 can be increased; conversely, when any one of the bolts 301 is subjected to an external force and is unscrewed from the screw hole 403, the pretightening force applied to it by the stator core 20 and the base 10 may be reduced.
Because the pretightening force applied to the bolt 301 is in a direct proportional relation with the rigidity of the bolt, when the motor generates high-frequency resonance and causes overhigh electromagnetic noise, the external force is applied to any number of bolts 301 in the motor to drive the bolt 301 to be screwed in or out of the threaded hole 403 so as to change the pretightening force applied to the bolt 301, so that the rigidity of the bolt 301 can be changed, the rigidity of the stator core 20 is changed accordingly, the high-frequency electromagnetic resonance is eliminated, the electromagnetic noise is reduced, and the noise reduction treatment of the motor is realized.
It should be understood that the connecting member 30 includes, but is not limited to, a bolt 301, and any connecting member that can establish a connection between the base 10 and the stator core 20 and has "stiffness adjustable" characteristics can be used as the connecting member in the embodiment of the present invention, for example, a spring with a certain shape and structure.
In an embodiment of the present invention, as shown in fig. 3, the connecting member 30 further includes: a spring washer 302; wherein the bolt 301 is located outside the base 10, and the spring washer 302 is located between the base 10 and the bolt 301.
In this embodiment, the connection member 30 includes a bolt 301 and a spring washer 302, and the spring washer 302 is disposed between the bolt 301 and the base 10, so that when the external force acting on the bolt 301 disappears, the bolt 301 will not automatically unscrew from the threaded hole 403 under the elastic force of the spring washer 302, thereby ensuring the stability of the connection between the bolt 301 and the base 10 and the stator core 20.
When the bolt 301 is screwed into the screw hole 403 provided in the connection terminal 40, the connection terminal 40 and the bolt 301 are connected to each other approximately at a point. Therefore, in order to increase the force-bearing area of the stator core 20 and prevent the stator core 20 from being deformed due to the single-point excessive force, the at least two connection terminals 40 may be disposed on the outer wall surface of the stator core 20 in two ways:
mode 1: as shown in fig. 4, the at least two connection terminals 40 include: at least two cylindrical protrusions 401; the length direction of each cylindrical protrusion 401 is parallel to the axial direction of the stator core 20; at least two threaded holes 403 are arranged in a straight line along the length direction of each cylindrical protrusion 401 on each cylindrical protrusion 401.
Mode 2: as shown in fig. 5, the at least two connection terminals 40 include: at least two annular protrusions 402; the axial line of each annular protrusion 402 coincides with the axial line of the stator core 20; at least two screw holes 403 are provided in each of the annular protrusions 402 in the circumferential direction of the annular protrusion 402.
With respect to the above mode 1:
the length direction of each cylindrical protrusion 401 is parallel to the axial lead direction of the stator core 20, so that the stress area of the stator core 20 is increased, and the protrusions of the cylindrical structure have certain deformation resistance and can prevent the stator core 20 from deforming radially to a certain extent.
Meanwhile, in order to further prevent the stator core 20 from being deformed due to an excessive difference in radial force, at least two cylindrical protrusions 401 and the screw holes 403 provided on each cylindrical protrusion 401 satisfy one or more of the following two criteria a1, a 2:
standard a 1: the distance between every two adjacent columnar protrusions 401 is a first set distance.
Standard a 2: on each of the cylindrical protrusions 401, the distance between each two adjacent threaded holes 403 is a second set distance.
With respect to the above mode 2: the axial line of each annular protrusion 402 coincides with the axial line of the stator core 20; the stress area of the stator core 20 is increased, and the protrusions of the annular structure have certain deformation resistance, so that the stator core 20 can be prevented from radial deformation to a certain extent.
Meanwhile, in order to further prevent the stator core 20 from being deformed due to an excessive difference in radial force, at least two annular protrusions 402 and the threaded holes 403 provided on each annular protrusion 402 satisfy one or more of the following two criteria B1, B2:
standard B1: the distance between every two adjacent annular protrusions 402 is a third set distance.
Standard B2: in each of the annular protrusions 402, a distance between every two adjacent threaded holes 403 is a fourth set distance.
In the above-described embodiments 1 and 2, the columnar projection 401 or the annular projection 402 provided with the screw hole 403 may be provided on the outer wall of the stator core 20 by welding to the outer wall of the stator core 20. Of course, where possible, each cylindrical protrusion 401 may be integrally formed with the stator core 20; alternatively, each annular protrusion 402 may be integrally formed with the stator core 20.
As shown in fig. 6, an embodiment of the present invention provides a method for controlling a motor provided in any embodiment of the present invention to reduce noise, including:
In the above embodiment of the present invention, since the stiffness of the stator core 20 in the motor is related to the stiffness of each connecting member 30, and the stiffness of each connecting member 30 is adjustable, when the motor is operated and electromagnetic noise is too high due to high-frequency electromagnetic resonance, the stiffness of at least one connecting member 30 can be adjusted by external force to adjust the stiffness of the stator core 20, so as to change the mechanical frequency of the stator core 20, and eliminate the high-frequency electromagnetic resonance to reduce noise. The motor does not need to be disassembled, a new electromagnetic scheme is designed, and rotors with different groove numbers do not need to be replaced, and the rigidity of at least one connecting piece 30 only needs to be adjusted through at least one external force, so that the noise reduction treatment of the motor is more easily realized.
Specifically, when the detected electromagnetic noise exceeds a first preset value, it indicates that the electromagnetic noise of the motor is too high. The reason why the electromagnetic noise of the motor exceeds the first preset value specifically includes:
reason 1: when the motor runs, the stator core 20 of the motor generates high-frequency vibration, the mechanical frequency corresponding to the stator core 20 generating the high-frequency vibration is the same as the electromagnetic frequency of an external electromagnetic rotating force wave, and high-frequency resonance is generated;
reason 2: when the motor operates, the stator core 20 of the motor vibrates at a high frequency and its amplitude is too large.
When the electromagnetic noise of the motor is too high due to the too large amplitude of the stator core 20, the stiffness of each connecting member 30 needs to be increased to reduce the amplitude of the stator core 20, and therefore, in an embodiment of the present invention, in step 602, before the step of applying at least one external force to the at least one connecting member 30 of the motor to adjust the stiffness of the at least one connecting member 30 is performed, the following steps may be further performed:
detecting an amplitude of the stator core 20 of the motor;
and judging whether the amplitude reaches a second preset value.
When the amplitude of the stator core 20 is judged to reach the second preset value, it is indicated that the motor may have too high electromagnetic noise due to too large amplitude of the stator core 20. At this time, in an embodiment of the present invention, in step 602, the applying at least one external force to the at least one connecting member 30 of the motor to adjust the stiffness of the at least one connecting member 30 includes: applying at least one first external force to the at least one connection 30 of the motor to increase the stiffness of the at least one connection 30. The rigidity of the stator core 20 is increased by increasing the rigidity of at least one connecting piece 30, and the amplitude of the stator core 20 is reduced to be smaller than a second preset value, so that the noise reduction treatment of the motor is realized.
When the amplitude of the stator core 20 is judged not to reach the second preset value, it indicates that the motor may have too high electromagnetic noise due to high-frequency electromagnetic resonance. At this time, in an embodiment of the present invention, in step 602, the applying at least one external force to the at least one connecting member 30 of the motor to adjust the stiffness of the at least one connecting member 30 includes: applying at least one second external force to the at least one connection 30 of the motor to change the stiffness of the at least one connection 30. The rigidity of the stator core 20 can be changed no matter the rigidity of the at least one connecting piece 30 is increased or the rigidity of the at least one connecting piece 30 is reduced, so that the mechanical frequency of the stator core 20 is changed, the mechanical frequency of the stator core 20 is not the same as the electromagnetic frequency of an external electromagnetic rotating force wave, and high-frequency electromagnetic resonance is eliminated to achieve noise reduction of the motor.
In one embodiment of the present invention, when the at least one connection member 30 of the motor includes at least one bolt 301, the applying at least one external force to the at least one connection member 30 of the motor to adjust the rigidity of the at least one connection member 30 includes: at least one external force is applied to at least one bolt 301 of the motor to drive each bolt 301 subjected to the external force to be screwed into the corresponding threaded hole 403. Each bolt 301 which receives external force is driven by the external force to respectively rotate towards the corresponding threaded hole 403, so that the pretightening force applied to the bolt 301 is increased, and the rigidity of the stator core 20 can be increased.
In one embodiment of the present invention, when the at least one connection member 30 of the motor includes at least one bolt 301, the applying at least one external force to the at least one connection member 30 of the motor to adjust the rigidity of the at least one connection member 30 includes: at least one external force is applied to at least one bolt 301 of the motor to drive each bolt 301 subjected to the external force to be unscrewed from the corresponding threaded hole 403. Each bolt 301 which receives external force through external force driving is screwed out from the corresponding threaded hole 403, so that the pretightening force applied to the bolt 301 is reduced, and the rigidity of the stator core 20 can be reduced.
In order to more clearly illustrate the technical solution and advantages of the present invention, in combination with the motor shown in fig. 2 and 3, taking the example that the connecting member 30 in the motor includes the bolt 301 and the spring washer 302, when performing noise reduction processing on the motor, as shown in fig. 7, the following steps may be specifically included:
and step 701, controlling the motor to operate.
In step 703, when the detected electromagnetic noise exceeds a first preset value, the amplitude of the stator core 20 of the motor is detected.
It should be understood that the first preset threshold may be reasonably set in combination with actual service requirements such as specific service scenarios, usage and specifications of the motor.
It should be understood that the second preset threshold may be reasonably set in combination with actual service requirements such as specific service scenarios, usage and specifications of the motor.
In steps 704 and 705, when the connecting member 30 includes the bolt 301 and the spring washer 302, and the external force acting on the bolt 301 is removed, the elastic force of the spring washer 302 prevents the bolt 301 from being automatically unscrewed from the threaded hole 403, so as to ensure the stability of the connection between the bolt 301 and the base 10 and the stator core 20.
The embodiments of the invention have at least the following beneficial effects:
1. in the motor provided by one embodiment of the invention, the stator core and the base are respectively connected through a plurality of connecting pieces to fix the stator core in the base, and the rigidity of the stator core is related to the rigidity of each connecting piece; because the rigidity of each connecting piece is adjustable, when the motor causes overhigh electromagnetic noise due to high-frequency electromagnetic resonance, the rigidity of the stator core can be adjusted by adjusting the rigidity of at least one connecting piece through external force, so that the mechanical frequency of the stator core is changed, and the high-frequency electromagnetic resonance is eliminated to reduce the noise. Therefore, when the motor generates high-frequency electromagnetic resonance and causes overhigh electromagnetic noise, the motor does not need to be disassembled, a new electromagnetic scheme is designed, rotors with different groove numbers are not needed to be replaced, the rigidity of at least one connecting piece of the motor is only needed to be adjusted through at least one external force, and the noise reduction treatment of the motor is more easily realized.
2. In the motor provided by one embodiment of the invention, the connecting piece can comprise bolts, and because the pretightening force applied to the bolts is in a direct proportion relation with the rigidity of the bolts, when the electromagnetic noise is too high due to high-frequency resonance of the motor, external force is applied to any number of bolts in the motor to drive the bolts to be screwed in or out in the threaded holes so as to change the pretightening force applied to the bolts, so that the rigidity of the bolts can be changed, the rigidity of the stator core is changed accordingly, the high-frequency electromagnetic resonance is eliminated, the electromagnetic noise is reduced, and the noise reduction treatment of the motor is realized.
3. In the motor provided by the embodiment of the invention, the connecting piece comprises the bolt and the spring gasket, and the spring gasket is arranged between the bolt and the base, so that the bolt cannot automatically withdraw from the threaded hole under the action of the elastic force of the spring gasket, and the stability of the connection between the bolt and the base as well as between the bolt and the stator core is ensured.
4. In the motor provided by an embodiment of the present invention, the at least two connection terminals include at least two cylindrical protrusions, and at least two threaded holes linearly distributed are formed in each cylindrical protrusion along a length direction of the cylindrical protrusion, so that a stress area of the stator core can be increased, and the stator core is prevented from being deformed due to an excessive single-point stress. Meanwhile, the length direction of each cylindrical protrusion is parallel to the axial lead direction of the stator core, so that the stress area of the stator core is increased, and the protrusions of the cylindrical structure have certain deformation resistance and can prevent the radial deformation of the stator core to a certain extent.
5. In the motor provided in an embodiment of the present invention, the at least two connection terminals include at least two annular protrusions, and at least two threaded holes are formed in each of the annular protrusions along a circumferential direction of the annular protrusion, so that a stress area of the stator core can be increased, and the stator core is prevented from being deformed due to an excessively large single-point stress. Meanwhile, the axial lead of each annular protrusion coincides with the axial lead of the stator core, so that the stress area of the stator core is increased, and the protrusions of the annular structure have certain deformation resistance and can prevent the radial deformation of the stator core to a certain extent.
6. In the motor provided by an embodiment of the present invention, when at least two connection terminals include at least two cylindrical protrusions, a distance between every two adjacent cylindrical protrusions may be a first set distance, and a distance between every two adjacent threaded holes on each cylindrical protrusion is a second set distance, so that the stator core may be prevented from being deformed due to an excessive radial force difference.
7. In the motor according to an embodiment of the present invention, when the at least two connection terminals include at least two annular protrusions, a distance between every two adjacent cylindrical protrusions is a third set distance, and a distance between every two adjacent threaded holes on each cylindrical protrusion is a fourth set distance, so that the stator core is prevented from being deformed due to an excessive radial stress difference.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other similar elements in a process, method, article, or apparatus that comprises the element.
Finally, it is to be noted that: the above description is only a preferred embodiment of the present invention, and is only used to illustrate the technical solutions of the present invention, and not to limit the protection scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (10)
1. An electric machine, comprising: a base (10), a stator core (20) and at least two connectors (30);
each connecting piece (30) is respectively connected with the base (10) and the stator core (20) to fix the stator core (20) in the base (10);
the rigidity of each connecting piece (30) is adjustable, the adjustability is realized by external force acting on any one connecting piece (30), and the rigidity of the stator core (20) is adjusted by adjusting the rigidity of at least one connecting piece (30) through the external force.
2. The electric machine of claim 1,
the connector (30) comprising: a bolt (301);
the outer wall of the stator core (20) is provided with at least two connecting terminals (40), and each connecting terminal (40) is provided with at least one threaded hole (403);
at least two through holes (101) are formed in the base (10);
at least two threaded holes (403) and at least two through holes (101) are in one-to-one correspondence;
each bolt (301) is screwed into a threaded hole (403) corresponding to the current through hole (101) through one through hole (101), the pre-tightening force corresponding to each bolt (301) is adjustable, and the adjustment is realized through external force acting on any bolt (301).
3. The electric machine of claim 2,
the connector (30) further comprising: a spring washer (302); wherein the content of the first and second substances,
the bolt (301) is located outside the base (10), and the spring washer (302) is located between the base (10) and the bolt (301).
4. The electric machine of claim 2,
the at least two connection terminals (40) comprising: at least two cylindrical protrusions (401);
the length direction of each cylindrical protrusion (401) is parallel to the axial lead direction of the stator core (20);
at least two threaded holes (403) which are linearly distributed are arranged on each cylindrical protrusion (401) along the length direction of the cylindrical protrusion (401).
5. The electric machine of claim 4,
the interval distance between every two adjacent columnar protrusions (401) is a first set distance;
and/or the presence of a gas in the gas,
on each cylindrical protrusion (401), the distance between every two adjacent threaded holes (403) is a second set distance.
6. The electric machine of claim 2,
the at least two connection terminals (40) comprising: at least two annular protrusions (402);
the axial lead of each annular protrusion (402) is coincided with the axial lead of the stator core (20);
at least two threaded holes (403) are provided in each annular protrusion (402) in the circumferential direction of the annular protrusion (402).
7. A method of controlling a motor as claimed in any one of claims 1 to 6 to reduce noise, comprising:
detecting whether the electromagnetic noise of the motor exceeds a first preset value (601);
-applying at least one external force to the at least one connection (30) of the electric machine to adjust the stiffness (602) of the at least one connection (30) when the electromagnetic noise of the electric machine exceeds a first preset threshold.
8. The method of claim 7,
when the at least one connection (30) of the electric machine comprises at least one bolt (301),
said applying at least one external force to said at least one connection (30) of said motor to adjust the stiffness of said at least one connection (30) comprising:
applying at least one external force to at least one bolt (301) of the motor to drive each bolt (301) subjected to the external force to be screwed into the corresponding threaded hole (403).
9. The method of claim 7,
when the at least one connection (30) of the electric machine comprises at least one bolt (301),
said applying at least one external force to said at least one connection (30) of said motor to adjust the stiffness of said at least one connection (30) comprising:
applying at least one external force to at least one bolt (301) of the motor to drive each bolt (301) subjected to the external force to be unscrewed from the corresponding threaded hole (403) respectively.
10. The method according to any one of claims 7 to 9,
before the applying at least one external force to the at least one connection (30) of the motor to adjust the stiffness of the at least one connection (30), further comprising:
detecting an amplitude of the stator core (20) of the electric machine;
judging whether the amplitude reaches a second preset value or not,
if so, said applying at least one external force to said at least one connection (30) of said motor to adjust the stiffness of said at least one connection (30) comprises: applying at least one first external force to the at least one connection (30) of the motor to increase the stiffness of the at least one connection (30);
otherwise, said applying at least one external force to said at least one connection (30) of said motor to adjust the stiffness of said at least one connection (30) comprises: applying at least one second external force to the at least one connection (30) of the motor to change the stiffness of the at least one connection (30).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710405435.8A CN108988516B (en) | 2017-06-01 | 2017-06-01 | Motor and method for controlling motor to reduce noise |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710405435.8A CN108988516B (en) | 2017-06-01 | 2017-06-01 | Motor and method for controlling motor to reduce noise |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108988516A CN108988516A (en) | 2018-12-11 |
| CN108988516B true CN108988516B (en) | 2021-04-20 |
Family
ID=64501641
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710405435.8A Active CN108988516B (en) | 2017-06-01 | 2017-06-01 | Motor and method for controlling motor to reduce noise |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108988516B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113113984B (en) * | 2020-01-13 | 2022-03-22 | 安徽美芝制冷设备有限公司 | Motor, compressor and refrigeration plant |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3708707A (en) * | 1970-05-21 | 1973-01-02 | Bbc Brown Boveri & Cie | Frame and core-type dynamo-electric machine |
| JPH0970166A (en) * | 1995-08-31 | 1997-03-11 | Fanuc Ltd | Linear motor |
| CN102005852A (en) * | 2010-12-08 | 2011-04-06 | 沈阳工业大学 | Device for suppressing noise and vibration of radial flux motor |
-
2017
- 2017-06-01 CN CN201710405435.8A patent/CN108988516B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3708707A (en) * | 1970-05-21 | 1973-01-02 | Bbc Brown Boveri & Cie | Frame and core-type dynamo-electric machine |
| JPH0970166A (en) * | 1995-08-31 | 1997-03-11 | Fanuc Ltd | Linear motor |
| CN102005852A (en) * | 2010-12-08 | 2011-04-06 | 沈阳工业大学 | Device for suppressing noise and vibration of radial flux motor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108988516A (en) | 2018-12-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108988516B (en) | Motor and method for controlling motor to reduce noise | |
| JPWO2011080817A1 (en) | Stator core fixing structure and rotating electric machine having the same | |
| CN105594105B (en) | Generator spring for iron core support system enhances | |
| JPWO2014103056A1 (en) | Electric motor, pump, and method of manufacturing electric motor | |
| CN111566901B (en) | Motor with a motor housing | |
| CN206922567U (en) | Motor cushion blocking, frame component and cooking machine | |
| CN215186332U (en) | Induction motor | |
| CN202231524U (en) | Motor support | |
| JP2011239615A (en) | Rotor for rotary electric machine | |
| CN210431093U (en) | Disc type motor and bearing fixing structure thereof | |
| CN206922568U (en) | Motor cushion blocking, frame component and cooking machine | |
| US7855487B2 (en) | Generator end turn stress reduction collar | |
| JP7308456B2 (en) | motor | |
| US11411465B2 (en) | Gear system with motor | |
| JP2005304106A (en) | Low iron loss internal rotation motor | |
| CN105932811B (en) | motor structure assembly | |
| CN202231525U (en) | Motor bracket | |
| EP3787123A1 (en) | Cable shield connecting assembly for electrical device and method for securing and grounding a cable to a cylindrical housing of an electric rotary motor | |
| KR20170106020A (en) | BLDC motor assembly | |
| CN106593941B (en) | A kind of rotor pump impeller installation and positioning structure | |
| EP4064529A1 (en) | Pump and electric motor stator thereof | |
| CN218472900U (en) | External rotor motor capable of preventing metal debris from entering controller | |
| CN208461600U (en) | Motor and new-energy automobile with the motor | |
| CN214337681U (en) | Motor | |
| JP6450735B2 (en) | Exciter stator installation structure and rotating electric machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240222 Address after: Nuremberg, Germany Patentee after: Yinmengda Co.,Ltd. Country or region after: Germany Address before: Munich, Germany Patentee before: SIEMENS AG Country or region before: Germany |
|
| TR01 | Transfer of patent right |