CN110601592A - Method for improving energy transmission efficiency of friction interface of ultrasonic motor - Google Patents
Method for improving energy transmission efficiency of friction interface of ultrasonic motor Download PDFInfo
- Publication number
- CN110601592A CN110601592A CN201910869595.7A CN201910869595A CN110601592A CN 110601592 A CN110601592 A CN 110601592A CN 201910869595 A CN201910869595 A CN 201910869595A CN 110601592 A CN110601592 A CN 110601592A
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- CN
- China
- Prior art keywords
- stator
- rotor
- embedding
- transmission efficiency
- ultrasonic motor
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- 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
Links
- 230000005540 biological transmission Effects 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 15
- 239000002783 friction material Substances 0.000 abstract description 6
- 230000007774 longterm Effects 0.000 abstract 1
- 238000004904 shortening Methods 0.000 abstract 1
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000906 Bronze Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910021389 graphene Inorganic materials 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
-
- 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
- H02N2/043—Mechanical transmission means, e.g. for stroke amplification
-
- 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
- H02N2/08—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuators; Linear positioners ; Linear motors using travelling waves, i.e. Rayleigh surface waves
Landscapes
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Abstract
A method for improving the energy transmission efficiency of friction interface of ultrasonic motor features that the tooth slot structure on the surface of stator is eliminated, the travelling wave generated by piezoelectric material is used as the teeth for embedding in drive, a piezoelectric material layer is attached to rotor to excite the rotor to generate standing wave and form another drive embedding tooth, which is engaged with the teeth for embedding in stator, and the standing wave generated by rotor and the travelling wave generated by stator have same frequency and same amplitude and 90-270 deg of phase difference. The invention not only improves the energy transmission efficiency, but also can avoid the problem of tooth depression of the surface of a friction material of the ultrasonic motor in a long-term storage state, and avoid the problems of motor performance reduction or service life shortening and the like caused by the damage of a friction interface after the motor is difficult to start or repeatedly started and stopped.
Description
Technical Field
The invention relates to an ultrasonic motor technology, in particular to a method for improving transmission efficiency of a stator and a rotor of an ultrasonic motor, and specifically relates to a method for improving energy transmission efficiency of a friction interface of an ultrasonic motor.
Background
The ultrasonic motor is a novel micro special motor which is rapidly developed in the 80 s of the 20 th century and has special application, and micro vibration of an elastic body stator is converted into macro motion of a rotor through friction by utilizing an inverse piezoelectric effect. To amplify the amplitude, the ultrasonic motor stator structure is typically in the form of a slot, as shown in fig. 1. However, the surface of the friction material is stressed unevenly under the pre-stress, and the polymer matrix is easy to creep under the long-time compression state, so that the problem of tooth collapse is caused, the static friction is large, and the motor is difficult to start. In addition, the transmission method of the ultrasonic motor is friction transmission, so that the efficiency is low.
In order to avoid the problems, the invention is urgently needed to provide a method for high-efficiency transmission of the embedding energy of the friction interface of the ultrasonic motor, and the energy transmission efficiency is improved.
Disclosure of Invention
The invention aims to solve the problems of tooth sink and low efficiency of friction materials of the conventional ultrasonic motor stator, and provides a method for improving the energy transmission efficiency of a friction interface of an ultrasonic motor by embedding and transmitting the friction interface.
The technical scheme of the invention is as follows:
a method for improving the energy transmission efficiency of friction interface of ultrasonic motor features that the tooth slot structure on the surface of stator is eliminated, the travelling wave generated by piezoelectric material is used as the teeth for embedding in drive, a piezoelectric material layer is attached to rotor to excite the rotor to generate standing wave and form another drive embedding tooth, which is engaged with the teeth for embedding in stator, and the standing wave generated by rotor and the travelling wave generated by stator have same frequency and same amplitude and 90-270 deg of phase difference to form the embedding in friction interface.
The optimal phase difference between the stator up-running wave and the rotor up-running wave is 180 degrees.
The invention has the beneficial effects that:
(1) The invention changes the tooth-shaped stator into the planar stator, avoids the problem of tooth sink, and can avoid the problems that the motor is difficult to start or the friction surface is damaged due to repeated starting and stopping, thereby affecting the performance of the motor or reducing the service life of the motor.
(2) And the transmission form of the rotor standing wave and the stator traveling wave is embedded, so that the transmission efficiency of the ultrasonic motor is improved.
Drawings
Fig. 1 is a schematic diagram of the transmission of a stator and a rotor of a conventional ultrasonic motor.
Fig. 2 is a schematic view of the transmission of the stator and rotor of the ultrasonic motor of the invention.
Detailed Description
The invention is further described below with reference to the figures and examples.
Example 1.
As shown in fig. 2.
A method for improving the energy transmission efficiency of friction interface of ultrasonic motor includes such steps as removing the tooth slot structure on the surface of stator, using the traveling wave generated by piezoelectric material to drive the teeth, sticking a piezoelectric material layer to rotor to make the exciting standing wave frequency of rotor be 50KHz, amplitude 0.8 microns and phase difference with traveling wave of stator be 90 deg, and increasing the transmission efficiency by 23%.
Example 2.
A layer of piezoelectric material is additionally arranged on the rotor, the frequency of the exciting standing wave is 50KHz, the amplitude is 1.0 mu m, the phase difference with the stator traveling wave is 135 degrees, and the transmission efficiency is improved by 27 percent after the motor is assembled.
Example 3.
A layer of piezoelectric material is additionally arranged on the rotor, the frequency of the exciting standing wave is 50KHz, the amplitude is 1.2 mu m, the phase difference with the stator traveling wave is 180 degrees, and the transmission efficiency is improved by 40 percent after the motor is assembled.
Example 4.
A layer of piezoelectric material is additionally arranged on the rotor, the frequency of the exciting standing wave is 70KHz, the amplitude is 1.2 mu m, the phase difference with the stator traveling wave is 225 degrees, and the transmission efficiency is improved by 33 percent after the motor is assembled.
Example 5.
A layer of piezoelectric material is additionally arranged on the rotor, the frequency of the exciting standing wave is 70KHz, the amplitude is 1.0 mu m, the phase difference with the stator traveling wave is 270 degrees, and the transmission efficiency is improved by 30 percent after the motor is assembled.
Example 6.
A layer of piezoelectric material is additionally arranged on the rotor, the frequency of the exciting standing wave is 70KHz, the amplitude is 0.8 mu m, the phase difference with the stator traveling wave is 270 degrees, and the transmission efficiency is improved by 26 percent after the motor is assembled.
The embodiment of the invention only aims at the situation that the stator is made of phosphor bronze, the rotor is made of aluminum alloy, and the friction material is made of graphene modified polyimide-based friction material. Because different materials have different elastic modulus, hardness and frictional wear performance, the optimal solution of the required frequency and amplitude should be recalculated when different stators, rotors and frictional materials are selected. However, it will be apparent to those skilled in the art that a variety of stator, rotor, and friction materials may be selected without departing from the design method, and such selection is considered to be within the scope of the present invention.
The parts not involved in the present invention are the same as or can be implemented using the prior art.
Claims (2)
1. A method for improving the energy transmission efficiency of friction interface of ultrasonic motor features that the tooth slot structure on the surface of stator is eliminated, the travelling wave generated by piezoelectric material is used as the teeth for embedding in drive, a piezoelectric material layer is attached to rotor to excite the rotor to generate standing wave and form another drive embedding tooth, which is engaged with the teeth for embedding in stator, and the standing wave generated by rotor and the travelling wave generated by stator have same frequency and same amplitude and 90-270 deg of phase difference to form the embedding in friction interface.
2. The method of claim 1, wherein the traveling wave generated by the stator is 180 ° out of phase with the standing wave generated by the rotor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910869595.7A CN110601592A (en) | 2019-09-16 | 2019-09-16 | Method for improving energy transmission efficiency of friction interface of ultrasonic motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910869595.7A CN110601592A (en) | 2019-09-16 | 2019-09-16 | Method for improving energy transmission efficiency of friction interface of ultrasonic motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110601592A true CN110601592A (en) | 2019-12-20 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910869595.7A Pending CN110601592A (en) | 2019-09-16 | 2019-09-16 | Method for improving energy transmission efficiency of friction interface of ultrasonic motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110601592A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112713806A (en) * | 2020-12-30 | 2021-04-27 | 南京航空航天大学 | Efficient driving curved surface rotor applied to traveling wave type ultrasonic motor |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03253267A (en) * | 1990-02-28 | 1991-11-12 | Brother Ind Ltd | Ultrasonic motor |
| EP0637123A1 (en) * | 1993-07-30 | 1995-02-01 | CROUZET Automatismes | Surface acoustic wave motor |
| JPH11252952A (en) * | 1998-02-27 | 1999-09-17 | Star Micronics Co Ltd | Ultrasonic motor |
| US6288475B1 (en) * | 1998-02-27 | 2001-09-11 | Star Micronics Co., Ltd. | Ultrasonic motor |
| CN102647108A (en) * | 2012-04-10 | 2012-08-22 | 上海交通大学 | Traveling wave ultrasonic motor similar to the gear transmission and control method thereof |
| CN102931870A (en) * | 2012-11-02 | 2013-02-13 | 南京航空航天大学 | Standing wave linear ultrasonic motor |
| CN203301398U (en) * | 2013-06-03 | 2013-11-20 | 沈阳大学 | Symmetrical ultrasonic motor |
-
2019
- 2019-09-16 CN CN201910869595.7A patent/CN110601592A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03253267A (en) * | 1990-02-28 | 1991-11-12 | Brother Ind Ltd | Ultrasonic motor |
| EP0637123A1 (en) * | 1993-07-30 | 1995-02-01 | CROUZET Automatismes | Surface acoustic wave motor |
| JPH11252952A (en) * | 1998-02-27 | 1999-09-17 | Star Micronics Co Ltd | Ultrasonic motor |
| US6288475B1 (en) * | 1998-02-27 | 2001-09-11 | Star Micronics Co., Ltd. | Ultrasonic motor |
| CN102647108A (en) * | 2012-04-10 | 2012-08-22 | 上海交通大学 | Traveling wave ultrasonic motor similar to the gear transmission and control method thereof |
| CN102931870A (en) * | 2012-11-02 | 2013-02-13 | 南京航空航天大学 | Standing wave linear ultrasonic motor |
| CN203301398U (en) * | 2013-06-03 | 2013-11-20 | 沈阳大学 | Symmetrical ultrasonic motor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112713806A (en) * | 2020-12-30 | 2021-04-27 | 南京航空航天大学 | Efficient driving curved surface rotor applied to traveling wave type ultrasonic motor |
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Legal Events
| Date | Code | Title | Description |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191220 |
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| RJ01 | Rejection of invention patent application after publication |