CN107222057B - Stator structure for actively controlling motor stator vibration - Google Patents
Stator structure for actively controlling motor stator vibration Download PDFInfo
- Publication number
- CN107222057B CN107222057B CN201710344580.XA CN201710344580A CN107222057B CN 107222057 B CN107222057 B CN 107222057B CN 201710344580 A CN201710344580 A CN 201710344580A CN 107222057 B CN107222057 B CN 107222057B
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- vibration
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- motor stator
- piezoelectric actuator
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- 239000000463 material Substances 0.000 description 5
- 239000010410 layer Substances 0.000 description 4
- 238000009423 ventilation Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000002033 PVDF binder Substances 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/24—Casings; Enclosures; Supports specially adapted for suppression or reduction of noise or vibrations
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/02—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuators; Linear positioners ; Linear motors
- H02N2/04—Constructional details
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Abstract
The invention discloses a stator structure for actively controlling motor stator vibration. The motor stator vibration control device comprises a piezoelectric actuator, a vibration sensor, a vibration controller and a power amplifier, wherein the piezoelectric actuator and the vibration sensor are fixedly paved on the surface of a motor stator, the vibration sensor detects and collects vibration signals of the motor stator and sends the vibration signals to the vibration controller, the vibration controller generates a control signal according to distribution of the piezoelectric actuator on the motor stator and the vibration signals and outputs the control signal to the power amplifier, the power amplifier amplifies power of the control signal input by the vibration controller, and the piezoelectric actuator paved on the motor stator is driven to change the dynamic characteristics of the motor stator, so that active control of mechanical, electromagnetic vibration and noise of the motor stator is realized. The invention can actively control the mechanical and electromagnetic vibration of the motor stator, so that the vibration of the motor is obviously reduced.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a stator structure for actively controlling motor stator vibration.
Background
Various motors working on the electromagnetic principle, such as induction motors, permanent magnet motors, switched reluctance motors and the like, are core equipment in the current electric energy conversion process and play an important role in national economy and daily life of people.
Vibration and noise generated in the working process of the motor not only affect the performance of the motor, but also pollute the environment. Along with the attention of people to the vibration and noise of the electromechanical products, the vibration and noise of the motor have become an important technical index for measuring the quality of the motor products. In particular, modern motors are developed towards high current, high magnetic density and light structure, and the vibration and noise problems of the motors are more remarkable.
The vibration and noise of the motor consist of electromagnetic vibration and noise, mechanical vibration and noise, ventilation vibration and noise. Electromagnetic vibration and noise are generated by the electromagnetic field in the motor air gap, and electromagnetic force which changes with time and space is generated on the surfaces of the stator and the rotor close to the air gap, so that the stator (comprising a machine base) and the rotor vibrate, and surrounding air pulsation is caused to generate noise. Mechanical vibrations and noise are vibrations and noise caused by unbalance of the rotor, bearings, brushes, etc. Ventilation vibrations and noise are vibrations and noise caused by the air flow of ventilation components, such as fans, air ducts, or by aerodynamic forces. In motors with low rotational speeds, ventilation vibrations and noise are generally not noticeable. Therefore, electromagnetic vibration and noise become main vibration and noise sources of many motors, and research on the electromagnetic vibration and noise characteristics of the motors is a key for solving the vibration and noise of the motors.
Since the stator of the motor is a key part of the motor for realizing electromagnetic energy conversion, electromagnetic force when the motor realizes electromagnetic energy conversion directly acts on the inner or outer surface of the stator, so that vibration and noise of the stator in the motor are the core of the vibration and noise of the motor.
At present, some passive control means are usually adopted for controlling the vibration and noise of the motor stator, such as chute, air gap increasing, high damping material laying on the stator, etc., and these measures may obtain a certain effect under some specific conditions, but when the rotation speed or working state of the motor changes, the vibration and noise of the motor stator are still serious, so that the vibration and noise problem of the motor is difficult to be fundamentally solved.
Disclosure of Invention
Based on the vibration active control and the development of a piezoelectric actuator, the invention provides a stator structure for actively controlling the vibration of a motor stator, and the piezoelectric actuator is utilized to actively control the electromagnetic and mechanical vibration of various motor stators working on an electromagnetic principle, so that the vibration of the motor stator under any condition can be actively controlled, and the vibration and noise problems caused by the machinery and the electromagnetic are reduced.
The technical scheme of the invention is as follows:
the invention comprises a piezoelectric actuator, wherein the piezoelectric actuator is fixedly paved on the surface of a motor stator, and the piezoelectric actuator paved on the surface of the motor stator is utilized to change the dynamic characteristic of the motor stator, so as to realize the purpose of actively controlling the mechanical, electromagnetic vibration and noise of the motor.
The piezoelectric actuator of the present invention may be selectively laid on a partial surface of the motor stator, or may be entirely on the surface of the motor stator.
The piezoelectric actuator can be a single-layer, double-layer or multi-layer piezoelectric ceramic (PZT), piezoelectric Polymer (PVDF) or piezoelectric Macro Fiber Composite (MFC) structure or one or a combination of a plurality of structures.
The motor stator is characterized by further comprising a vibration sensor, a vibration controller and a power amplifier, wherein the vibration sensor is fixed on the surface of the motor stator and/or the ground feet, the signal output end of the vibration sensor is connected with the vibration controller, and the vibration controller is connected with the piezoelectric actuator through the power amplifier.
The vibration sensor detects and collects vibration signals of the motor stator and sends the vibration signals to the vibration controller, the vibration controller takes the minimum vibration of the stator as a target, generates a control signal according to a certain control mode and outputs the control signal to the power amplifier, the power amplifier amplifies the control signal input by the vibration controller, and the piezoelectric actuator paved on the motor stator is driven to change the power characteristic of the motor stator, so that the mechanical and electromagnetic vibration and noise of the motor stator are actively controlled.
The control mode is commonly used as switch control, PID (proportion-integral-derivative) control, optimal control, self-adaptive control and the like.
The vibration sensor is an acceleration sensor, a speed sensor or a strain sensor.
When the piezoelectric actuators are connected with the power amplifier, the piezoelectric actuators are connected in a single mode, a serial mode, a parallel mode or a combination of one or more of the modes.
The independent mode is as follows: each piezoelectric actuator is connected to a power amplifier.
The serial connection mode is as follows: the piezoelectric actuators are connected in series and then connected to the power amplifier.
The parallel connection mode is as follows: the piezoelectric actuators are connected in parallel and then connected to the power amplifier.
Serial-parallel connection mode: the piezoelectric actuators are connected in series and then in parallel or in parallel and then in series and then connected to the power amplifier.
The piezoelectric actuator is rectangular, tile-shaped or annular in shape. The motor stator can be paved in any direction, and the ring shape refers to a ring shape which is completely or partially circumferentially around the surface of the motor stator.
The piezoelectric actuator is fixed on the inner surface or/and the outer surface of the motor stator.
The direction of the laying of the piezoelectric actuators can be the same or different.
The piezoelectric actuator can be laid along the axial direction, the circumferential direction or the direction forming any angle with the axis of the motor.
The piezoelectric actuator can be symmetrically paved or asymmetrically paved.
The piezoelectric actuator fixing and laying mode can be a pasting mode or any other feasible mode.
In order to protect the piezoelectric actuator, other materials are wrapped and laid outside the piezoelectric actuator, and the other materials specifically refer to general metal, plastic, rubber and other nonmetallic materials.
A series of laminar piezoelectric actuators are paved on the outer surface of a stator of a motor or between a stator core and a shell in the axial direction, the circumferential direction or the direction forming a certain angle with the axis, vibration of the stator and/or a ground leg of the motor is measured by utilizing a vibration sensor, and a vibration controller generates a control signal according to a certain control strategy and outputs the control signal to a power amplifier according to the minimum vibration of the stator as a target according to the distribution and connection condition of the piezoelectric actuators and the vibration signal on the stator and/or the ground leg of the motor measured by the vibration sensor, and the power amplifier amplifies the control signal input by the vibration controller to drive the piezoelectric actuators paved on the outer surface of the stator of the motor or between the stator core and the shell to change the power characteristic of the stator of the motor, so that the aim of actively controlling mechanical, electromagnetic vibration and noise of the motor is achieved.
The beneficial effects of the invention are as follows:
the invention can actively control the mechanical and electromagnetic vibration of the motor, so that the vibration and noise of the motor stator are obviously reduced.
Drawings
Fig. 1 is a front view of a motor monolithic stator structure with a piezoelectric actuator laid thereon.
Fig. 2 is a left side cross-sectional view of a motor monolithic stator structure with a piezoelectric actuator laid down.
Fig. 3 is a front view of a motor-combined stator structure with a piezoelectric actuator laid thereon.
Fig. 4 is a left side cross-sectional view of a motor-combined stator structure with a piezoelectric actuator laid down.
Fig. 5 is a connection diagram of individual connection of piezoelectric actuators on a motor stator.
Fig. 6 is a connection diagram of the piezoelectric actuators on the stator of the motor after being partially connected in parallel.
Fig. 7 is a front view of a motor structure with the present invention.
Fig. 8 is a left side view of a motor structure with the present invention.
Fig. 9 is a block diagram of a system with active motor control according to the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
For the differences in motor stator structure, two exemplary motor structure embodiments are illustrated, but are not limited to the following:
example 1
As shown in fig. 1 and 2, the present embodiment includes a piezoelectric actuator 11 and a stator 12 of an integral structure; the stator 12 of the integral structure is provided with a lead box 13 and left and right footings 14a and 14a.
The piezoelectric actuator 11 is in the form of a strip or tile, and as shown in fig. 1, is laid on the outer surface of the motor stator 12 in segments in the axial direction and the circumferential direction, so as to form a stator structure capable of actively controlling the vibration of the motor stator.
The piezoelectric actuator 11 may be a single-layer, double-layer or multi-layer piezoelectric ceramic (PZT), and a general metal is laid on the outside of the piezoelectric actuator 11 to protect the piezoelectric actuator 11.
Example 2
As shown in fig. 3 and 4, the present embodiment includes a piezoelectric actuator 11 and a stator 12 of a combined structure; the stator 12 of the combined structure is composed of a stator housing 121 and an iron core 122, wherein the housing 121 and the stator iron core 122 are rigidly connected, and a lead box 13 and left and right footings 14a and 14b are arranged on the stator.
The piezoelectric actuator 1 is in a strip shape or a tile shape, and is laid between the casing 121 and the stator core 122 along the axial direction or/and the circumferential direction in a segmented manner, so that a stator structure capable of actively controlling the vibration of the motor stator is formed.
The piezoelectric actuator 11 may be a piezoelectric Polymer (PVDF), and a general plastic nonmetallic material is laid outside the piezoelectric actuator 11 to protect the piezoelectric actuator 11.
As for other structures than the motor stator, the motor 1 is embodied as shown in fig. 7 and 8, which includes a motor rotor 16, a motor stator 12 with a piezoelectric actuator 1, front and rear end caps 15a and 15b, front and rear bearings 17a and 17b, and left and right legs 14a and 14b. The motor rotor 16 is fixed to the front and rear end caps 15a and 16b through front and rear bearings 17a and 17b, the front and rear end caps 15a and 15b are fixed to both ends of the motor stator 12 with piezoelectric actuator, and the motor stator 12 with piezoelectric actuator is fixed to the base through the left and right legs 14a and 14b.
As shown in fig. 9, a vibration sensor 2 is arranged on the motor 1, and a vibration controller 3 and a power amplifier 4 are arranged outside the motor 1. The vibration sensor 2 is fixed on the outer surface of the motor stator 12 and/or the left and right feet 14a and 14b and is connected with the vibration controller 3; the vibration controller 3 is connected with the power amplifier 4; the power amplifier 4 is connected to several connections of a piezoelectric actuator 11 arranged on a stator 12.
For the connection of the piezoelectric actuator 11 on the stator of the motor, an example is shown in fig. 5 and 6:
as shown in fig. 5, the piezoelectric actuators 11 on the motor stator form 2n joints a1+b1, a2+b3, … an+bn respectively from two wires of each piezoelectric actuator, and are individually connected to the power amplifier, where n is the number of piezoelectric actuators.
As shown in fig. 6, a plurality of piezoelectric actuators with the same function are connected in parallel or in series to form 2k connectors a1+b1, a2+b3 and … am+bm, wherein m is the number of parallel or series branches of the piezoelectric actuators. The parallel connection or the series connection can be adjacent or jumping.
Or a mixed connection mode combining a single mode and a parallel mode is carried out to form the 2m joints a1+b1, a2+b3 and … a m +b m Where m is the sum of the number of parallel branches of piezoelectric actuators and the number of individually connected piezoelectric actuators.
The vibration sensor 2 measures vibrations on the motor stator 12 and/or the left and right legs 14a,14b and transmits signals to the vibration controller 3; the vibration controller 3 outputs a control signal according to a switch control mode and with the minimum vibration of the motor as a target according to the distribution and connection condition of the piezoelectric actuator and the vibration characteristic of the motor stator measured by the vibration sensor 2, and inputs the control signal to the power amplifier 4; the power amplifier 4 amplifies the power of the control signal input by the controller, and then changes the power characteristic of the motor stator by using the piezoelectric actuator 11 paved on the surface of the motor stator 12 or between the shell 121 and the stator core 122, so as to achieve the purpose of actively controlling the vibration of the motor stator 12.
Claims (7)
1. The utility model provides a stator structure to motor stator vibration carries out initiative control which characterized in that: the motor comprises a piezoelectric actuator fixedly paved on the surface of a motor stator, wherein the piezoelectric actuator paved on the surface of the motor stator is utilized to change the dynamic characteristic of the motor stator, so that the purpose of actively controlling the mechanical, electromagnetic vibration and noise of the motor is realized;
the motor also comprises a vibration sensor (2), a vibration controller (3) and a power amplifier (4), wherein the vibration sensor (2) is fixed on the surface of a motor stator and/or a ground leg, the signal output end of the vibration sensor (2) is connected with the vibration controller (3), and the vibration controller (3) is connected with a piezoelectric actuator (11) through the power amplifier (4);
the vibration sensor (2) detects and collects vibration signals of the motor stator and sends the vibration signals to the vibration controller (3), the vibration controller (3) takes the minimum vibration of the stator as a target according to the distribution of piezoelectric actuators (11) on the motor stator and the vibration signals of the vibration sensor (2), a control signal is generated and output to the power amplifier (4), the power amplifier (4) amplifies the power of the control signal input by the vibration controller (3), and the piezoelectric actuators paved on the motor stator are driven to change the dynamic characteristics of the motor stator, so that the mechanical, electromagnetic vibration and noise of the motor are actively controlled.
2. A stator structure for actively controlling vibration of a stator of an electric machine according to claim 1, wherein: when the piezoelectric actuators (11) are connected to the power amplifier (4), the piezoelectric actuators are connected in one or a combination of a plurality of modes selected from a single mode, a series mode, a parallel mode and a series-parallel mode.
3. A stator structure for actively controlling vibration of a stator of an electric machine according to claim 2, wherein:
the piezoelectric actuator (11) is rectangular, tile-shaped or annular.
4. A stator structure for actively controlling vibration of a stator of an electric machine according to claim 1, wherein: the piezoelectric actuator (11) is fixed on the inner surface or/and the outer surface of the motor stator.
5. A stator structure for actively controlling vibration of a stator of an electric machine according to claim 1, wherein: each piezoelectric actuator (11) is laid along the axial direction, the circumferential direction or the direction of any angle with the axis of the motor.
6. A motor structure, characterized in that: the stator structure of claim 1 is arranged on the motor.
7. An active control system of a motor is characterized in that: the stator structure of claim 1 is arranged on the motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710344580.XA CN107222057B (en) | 2017-05-16 | 2017-05-16 | Stator structure for actively controlling motor stator vibration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710344580.XA CN107222057B (en) | 2017-05-16 | 2017-05-16 | Stator structure for actively controlling motor stator vibration |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107222057A CN107222057A (en) | 2017-09-29 |
| CN107222057B true CN107222057B (en) | 2023-09-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710344580.XA Active CN107222057B (en) | 2017-05-16 | 2017-05-16 | Stator structure for actively controlling motor stator vibration |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108206615A (en) * | 2018-03-26 | 2018-06-26 | 上海特波电机有限公司 | Asynchronous machine with vibration damping thermometric |
| CN112855488B (en) * | 2019-11-12 | 2022-04-19 | 宁波方太厨具有限公司 | Booster pump |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6166544A (en) * | 1984-09-06 | 1986-04-05 | Toshiba Corp | Vibration and noise suppressor |
| KR19990021648A (en) * | 1997-08-30 | 1999-03-25 | 정몽규 | Active Torque Rod for Vehicle Vibration Noise Reduction |
| DE102004010012B3 (en) * | 2004-03-01 | 2005-07-28 | Siemens Ag | Noise minimizing, especially of fan unit integrated in housing, involves controlling actuator(s) interacting with housing with reference sensor signal derived from first harmonic of electric motor generated oscillation, fan unit oscillation |
| CN102072276A (en) * | 2010-12-30 | 2011-05-25 | 上海交通大学 | Electromagnetic active control device for longitudinal vibration of marine shafting |
| CN106545574A (en) * | 2016-10-27 | 2017-03-29 | 上海交通大学 | A kind of oscillation crosswise control device of cardan shaft |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6920794B2 (en) * | 2002-10-07 | 2005-07-26 | General Electric Company | Method and apparatus for rotary machine vibration control |
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2017
- 2017-05-16 CN CN201710344580.XA patent/CN107222057B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6166544A (en) * | 1984-09-06 | 1986-04-05 | Toshiba Corp | Vibration and noise suppressor |
| KR19990021648A (en) * | 1997-08-30 | 1999-03-25 | 정몽규 | Active Torque Rod for Vehicle Vibration Noise Reduction |
| DE102004010012B3 (en) * | 2004-03-01 | 2005-07-28 | Siemens Ag | Noise minimizing, especially of fan unit integrated in housing, involves controlling actuator(s) interacting with housing with reference sensor signal derived from first harmonic of electric motor generated oscillation, fan unit oscillation |
| CN102072276A (en) * | 2010-12-30 | 2011-05-25 | 上海交通大学 | Electromagnetic active control device for longitudinal vibration of marine shafting |
| CN106545574A (en) * | 2016-10-27 | 2017-03-29 | 上海交通大学 | A kind of oscillation crosswise control device of cardan shaft |
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| Publication number | Publication date |
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| CN107222057A (en) | 2017-09-29 |
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