CN101453177A - Split type helical stator micromotor - Google Patents
Split type helical stator micromotor Download PDFInfo
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- CN101453177A CN101453177A CNA2008100516965A CN200810051696A CN101453177A CN 101453177 A CN101453177 A CN 101453177A CN A2008100516965 A CNA2008100516965 A CN A2008100516965A CN 200810051696 A CN200810051696 A CN 200810051696A CN 101453177 A CN101453177 A CN 101453177A
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- micromotor
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Abstract
The invention relates to a split type spiral stator micromotor, which belongs to a minimized ultrasound motor. A piezoelectric ultrasound transducer 1 and a piezoelectric ultrasound transducer 2 are connected with wave guide respectively; and the wave guide is connected with the outside of a rotor of the micrmotor in a winding mode to form a spiral stator of the micromotor, and is connected with the rotor of the micromotor in a contact mode. The micromotor has the advantages that the structure is innovative, and a novel split type structure is adopted; and a driving source of the ultrasound micromotor is separated from an executing part, and the energy is transferred through the wave guide. The micromotor can greatly reduce the volume, so as to contribute to the further micromation.
Description
Technical field
The invention belongs to a kind of new structure miniature ultrasonic motor based on the work of row ripple mode.
Background technology
Electrical micro-machine is widely used in the various MEMS (micro electro mechanical system) (MEMS).In various electrical micro-machines, electromagnetic micro-motor since its complicated structural limitations it is further microminiaturized.The static micro motor that utilizes integrated circuit fabrication process (IC technology) to make can't produce enough power outputs.And ultrasound micro-motor is owing to the microminiaturization that its small size, high pulling torque, high-energy-density characteristic help device is full of prospect.Ultrasound micro-motor is an inverse piezoelectric effect of utilizing piezoceramic material PZT or macromolecule PVDF thin-film material, ultrasonic vibration by the conversion piezoelectric vibrator forms driving force, realizes that ultrasonic vibration can convert mechanical energy to and rely on the micromachine of a kind of brand new that frictional force drives.
Development along with microrobot and MEMS technology has proposed higher specification requirement to ultrasound micro-motor.At present, ultrasound micro-motor continues to develop towards the direction of microminiaturization, and the structure of further simplifying electrical micro-machine is one of them important research means.Designs simplification not only helps the further microminiaturization of ultrasound micro-motor, more can improve the reliability of motor, helps the batch manufacturing of motor, and then reduces its cost.And complex structure, manufacture process requirement height, control are complicated, reliability and life-span are low is development of restriction ultrasound micro-motor and key in application problem always.
In the middle of to the further microminiaturized research of ultrasound micro-motor, exist technologic restriction: promptly be subjected to the processing of piezoelectric and the restriction of manufacture craft problem.On the other hand, the design new structure also is a striving direction of electrical micro-machine microminiaturization always.
Summary of the invention
The invention provides a kind of split type helical stator micromotor, to solve complex structure, manufacture process requirement height, control complexity, reliability and the low problem of life-span that existing electrical micro-machine exists.
The technical scheme that the present invention takes is: piezoelectric ultrasonic transducer one is connected with waveguide respectively with piezoelectric ultrasonic transducer two, and this waveguide solderless wrapped connection forms the helical form stator of electrical micro-machine in the rotor exterior of electrical micro-machine, and is connected with the rotor contact of this electrical micro-machine.
Waveguide cross sectional shape of the present invention is circle or rectangle.
The rotor of electrical micro-machine of the present invention adopts cylinder, hollow cylinder, sphere and cone.
Operation principle of the present invention: ultrasound micro-motor is made up of the stator that rotor and helix tube form, and waveguide and ultrasonic transducer one and two keep in touch in vibration processes; Piezoelectric ultrasonic transducer passes to helical stator by waveguide with the mechanical oscillation harmonic wave, encourages and make it to produce elliptic motion, and then drives working rotor.
The present invention designs a kind of new structure electrical micro-machine, on present piezoelectric micro motor research basis, further simplify the structure of electrical micro-machine, this electrical micro-machine mainly is made up of rotor, spiral type stator and piezoelectric ultrasonic transducer, be with traditional ultrasound micro-motor difference: one, spiral helicine stator structure; Its two, piezoelectric ultrasonic transducer will be gone ripple by waveguide and be passed to stator, promptly piezoelectric ultrasonic transducer and divided stator are from, rather than the structure that bonds together of the piezoelectric of conventional ultrasound electrical micro-machine and stator.
The helical stator structure of electrical micro-machine of the present invention itself can realize automatically and rotor between pretension, need not to add in addition preloaded spring; Its distinctive split-type structural helps the further microminiaturization of electrical micro-machine in addition.By the design of this new construction electrical micro-machine, than the design of present ultrasound micro-motor, can simplify the structure of electrical micro-machine greatly, reach high efficiency, low cost, high reliability, more help microminiaturized purpose.
The invention has the advantages that:
(1) novel structure is specially and has taked a kind of novel split-type structural---and the drive source of ultrasound micro-motor is separated with execution unit, transmit energy by waveguide.Can reduce the volume of electrical micro-machine greatly, help further microminiaturization.Adopt a kind of pattern of helical stator, increased the friction area between rotor and the stator, and then improved output torque.Waveguide is transmitted to vibration wave (row ripple) in the process of stator surface, and decay can appear in bending wave.The helical stator structure can effectively overcome above problem.
(2) transducer designs and manufacturing no longer are the restraining factors in the electrical micro-machine design process.Because split-type structural, can suitably increase the power of PZT (piezoelectric transducer), and can not influence the microminiaturization of ultrasound micro-motor, the requirement to little manufacturing process of piezoelectric ceramic simultaneously reduces.
(3) design of Controller and control mode are simplified.Owing to adopt the helical stator structure, the linear electric machine design in this project can (depend on machining accuracy) and guarantee positioning accuracy by mechanical structure in the certain resolution scope, safe reliable.Ultrasound micro-motor has higher non-linearity and in time becomes characteristic, realizes that in all periods the accurate location of electrical micro-machine is very difficult, and present means are to make an issue of on control method, and effect is bad.
In addition, drive, realize forward and reverse control of electrical micro-machine, thereby simplify row ripple type ultrasound micro-motor driver control method by switching to the ultrasonic transducer that is connected the waveguide two ends.(general, row ripple class electrical micro-machine is for forward and reverse control more complicated, and the driving power volume is bigger.)
The present invention specifically can be used for following field: the nanometer in (1) national defense industry is miniature, miniplane, spaceship and space probe etc.; (2) robot and micromachine are the fields that China gives priority to 21 century, and little ultrasound electric machine can make robot and micromachine simplified structure, alleviates quality, strengthen reliability.(3) little ultrasound electric machine can enter human body as the surgery medical procedure.As driver as artificial heart, remove thrombus etc., this will promote the industrialization of China's man-made organ and the development of Minimally Invasive Surgery technology greatly.(4) with the miniature ultrasonic motor application in palmtop PC, video telephone, portable instrument etc., will effectively reduce its quality, volume, reduce energy loss; (5) position control accuracy of little ultrasound electric machine can reach micro/nano level, will be used widely in precision instrument, Medical Devices and semiconductor fabrication.Be particularly suitable for the liquid working environment.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 operation principle schematic diagram of the present invention.Piezoelectric ultrasonic transducer passes to helical stator by waveguide with the mechanical oscillation harmonic wave, encourages and make it to produce elliptic motion, and then drives working rotor.
Embodiment
Piezoelectric ultrasonic transducer 1 is connected with waveguide 3 respectively with piezoelectric ultrasonic transducer 22, and this waveguide solderless wrapped connection forms the helical form stator 4 of electrical micro-machine in rotor 5 outsides of electrical micro-machine, and is connected with rotor 5 contacts of this electrical micro-machine.
Waveguide 3 cross sectional shapes of the present invention are circle or rectangle.
The rotor 5 of electrical micro-machine of the present invention adopts cylinder, hollow cylinder, sphere and cone.
Claims (3)
1, a kind of split type helical stator micromotor, it is characterized in that: piezoelectric ultrasonic transducer one is connected with waveguide respectively with piezoelectric ultrasonic transducer two, this waveguide solderless wrapped connection forms the helical form stator of electrical micro-machine in the rotor exterior of electrical micro-machine, and is connected with the rotor contact of this electrical micro-machine.
2, a kind of split type helical stator micromotor according to claim 1, it is characterized in that: the waveguide cross sectional shape is circle or rectangle.
3, a kind of split type helical stator micromotor according to claim 1 and 2 is characterized in that: the rotor of electrical micro-machine adopts cylinder, hollow cylinder, sphere and cone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100516965A CN101453177A (en) | 2008-12-30 | 2008-12-30 | Split type helical stator micromotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100516965A CN101453177A (en) | 2008-12-30 | 2008-12-30 | Split type helical stator micromotor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101453177A true CN101453177A (en) | 2009-06-10 |
Family
ID=40735243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100516965A Pending CN101453177A (en) | 2008-12-30 | 2008-12-30 | Split type helical stator micromotor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101453177A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106712570A (en) * | 2017-03-17 | 2017-05-24 | 浙江师范大学 | Series positive-negative spiral stator linear ultrasonic motor |
| CN108448926A (en) * | 2017-12-08 | 2018-08-24 | 浙江师范大学 | A kind of two-freedom ultrasound electric machine and its driving method |
-
2008
- 2008-12-30 CN CNA2008100516965A patent/CN101453177A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106712570A (en) * | 2017-03-17 | 2017-05-24 | 浙江师范大学 | Series positive-negative spiral stator linear ultrasonic motor |
| CN108448926A (en) * | 2017-12-08 | 2018-08-24 | 浙江师范大学 | A kind of two-freedom ultrasound electric machine and its driving method |
| CN108448926B (en) * | 2017-12-08 | 2020-04-10 | 浙江师范大学 | Two-degree-of-freedom ultrasonic motor and driving method thereof |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090610 |