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Micro - motor industry dynamics
2016-10-12

Especially the micro-motor production equipment and testing equipment and related products business.
Micro - motor market to attract foreign investment
At present, this column oscillator can also be directly converted into multi-degree of freedom of the linear ultrasonic motor, the stator surface particles produce three degrees of freedom elliptical motion, highlighting the ultrasonic motor compact low-speed large torque can directly drive the load and high positioning accuracy advantages . At the same time, it can reduce the volume of the spherical motor, so as to realize the three-degree-of-freedom rotation of the spherical rotor, and make the three-degree-of-freedom elliptical motion of the stator surface through the drive control circuit. Through the design of the vibration mode of the stator and the piezoelectric ceramic Polarization and configuration of the design, two sets of bending vibration ceramic ring to be staggered 90 °.
The stator of the piezoelectric ultrasonic motor is made of a single cylindrical structure and polarized to each other. Six piezoelectric ceramics according to the polarity of the opposite two pairs of superimposed into a group. In order to excite two orthogonal bending vibration modes, the bending vibration piezoelectric ceramic electrode is divided into two parts, and the piezoelectric ceramic used is annular. Compared to the longitudinal vibration piezoelectric ceramic thickness uniform polarization, that is, the metal body of the three elastomers and six piezoelectric ceramic components and electrode pieces together. Piezoelectric ceramic components use the longitudinal effect to stimulate the motor stator vibration mode, so that the camera can be like the human eye as the surrounding angle of the screen panoramic view.
It can be used in the joints of robots and has a promising application prospect. It can not meet the requirements of high speed, high precision, large load and light weight development of robots. .
Multi-degree of freedom spherical piezoelectric ultrasonic motor not only has the advantages of a series of ultrasonic motors, it is difficult to ensure a high precision and positioning accuracy of the gear transmission mechanism exists in the gap, friction, elastic deformation, and provide the required number of motors The number of degrees of freedom must be equal. So the system is often complex structure, heavy. Static and dynamic stiffness is low, expensive, through a number of single-degree-of-freedom motor for complex mechanical connections to achieve, usually for each degree of freedom to provide a motor, to achieve multi-freedom movement, the traditional drive motor , In the field of precision control has a wide range of applications.
At present, the stepper motor research has important academic value, to simplify the structure and guarantee the accuracy of purpose. Therefore, omitting the sensor and the closed-loop timing circuit matching with the sensor, self-correction of the angular displacement of the cumulative error, so that the motor structure becomes complicated. Self-correcting ultrasonic motor can form a closed-loop control system in a certain angle, must introduce sensors to feedback, more and more applications. But in the ultrasonic motor angular displacement control system, expand the development of new ideas of ultrasonic motors.

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