APPLICATIONS OF THE ULTRASONIC MOTORS CREATED BY WISCHNEWSKIY ULTRASONIC MOTORS CORPORATION.
Ultrasonic piezoelectric motors manufactured by Wischnewskiy Ultrasonic Motors (WUM) are fundamentally different from the conventional electromagnetic motors in their operating principles and structural design.
These motors have several unique properties that are absent in electromagnetic motors, and which have wide possibilities of application in industrial devices and products.
The basis of WUM piezoelectric ultrasonic motor is a piezoelectric resonator waveguide made entirely of piezoelectric material. This is a solid-state drive element or an actuator. The principle of operation of the piezoelectric ultrasonic motors WUM is as follows.
The piezoelectric actuator converts the energy of the electrical voltage supplied to its electrodes into the energy of the mechanical ultrasonic vibrations of the piezoelectric resonator waveguide in the form of standing acoustic waves propagating in the piezoelectric waveguide resonator.
Further, the energy of acoustic waves with the help of friction contact is converted into unidirectional movement of a movable element of a motor or device into which an actuator is built-in.
The main advantage of WUM piezoelectric ultrasonic motors over conventional electric motors is its simplicity of design, manufacturability and operational efficiency. This is especially evident in the design of micromotors.
Actuators of WUM piezoelectric ultrasonic motors are essentially discrete active elements that can be easily integrated into a variety of mechanical systems, providing multi-axis movements of their moving parts and assemblies.
WUM piezoelectric ultrasonic motors are easily controlled by voltage.
WUM motors operate in both continuous and step control modes.
The maximum speed of the movable element of the motor can reach 0.5 m/s or more.
The maximum pulling force developed by the motor actuator can reach 50 N or more.
A motor may take a minimum step in one millisecond or less. The minimum step may be fractions of a nanometer.
In a de-energized state, the movable motor element is inhibited by the friction element of the actuator pressed to it. In the ideal case, the braking force can reach the maximum pulling force of the motor actuator.
It is important that when the load on the movable motor element is exceeded above the pulling force, both in the working and de-energized state, the motor does not fail and allows the movable element to move.
Stopping the movable element of the motor in its working condition does not lead to an increase in the current consumed by the motor.
The great advantage of WUM piezoelectric ultrasonic motors is that these motors are direct-drive motors.
These motors do not require spindle devices that convert the fast rotation of the rotor into the slow motion of the slide. They don’t need gearboxes that convert the fast rotation of the rotor to the slow rotation of the device shaft. The absence of both allows eliminating the play of the drive element, which greatly increases the accuracy of its movement and stops. Besides, the strong noises inherent in these mechanisms are eliminated.
WUM piezoelectric ultrasonic motors can operate at ambient temperatures up to 200-280 ° C. The operating temperature of the motors is limited by the Curie temperature of the piezoceramics.
When using special piezoceramics, the operating temperature of these motors can reach 400 ° C.
WUM piezoelectric ultrasonic motors operate in a high vacuum without polluting it.
WUM piezoelectric ultrasonic motors do not ignite and are therefore are fireproof motors.
WUM Piezoelectric Ultrasonic Motors operate in strong alpha radiation, gamma radiation, neutron radiation, and x-ray fields.
WUM motors may not have magnetic parts, so they can operate in strong magnetic fields.
All of the listed properties of WUM piezoelectric ultrasonic motors determine their wide applications in various industrial devices and various devices of household appliances. For example:
WUM motors can be used in various technological tables of the semiconductor industry and in microscopic tables of various types of microscopes, which require low speeds, less than one micron per second, high positioning accuracy, higher fractions of a nanometer and at the same time a high speed of movement reaching 100 ... 300 mm/s.
WUM motors can be used in various optical systems and laser systems for fast and accurate movement of lenses, simple and complex lenses.
WUM motors can be used in various kinds of medical equipment, for example, in laser scalpels used for precise medical surgeries on the eyeball and other human organs.
WUM motors can be used in medical re-static pumps that accurately dispense medical drugs, insulin, etc.
WUM motors can be used in geodetic instruments, for example, in theodolites for the two-axis drive of an optical measuring system, providing the high accuracy of its positioning.
WUM motors can be used in CD drives for rotating discs and for positioning a laser recording and reading head.
WUM motors can be used in hard drive drives of storage devices to position the recording and reading magnetic heads.
WUM motors can be used in a variety of vehicle gauges.
WUM motors can be used in watch movements to drive the minute and clock hands.
WUM motors can be used in various kinds of locking mechanisms for doors, safes, etc.
WUM motors can be used in magnetic field meters where only non-magnetic drives can be used.
WUM motors can be used in various kinds of drives inside vacuum technological systems.
WUM motors can be used in various types of X-ray machines to drive tungsten plates of X-ray MLC collimators, under the influence of a strong X-ray fields.
WUM motors can be used in particle accelerators in high vacuum and strong magnetic fields.
WUM motors can be used in various faucet locking and switching pipes mechanizms supplying liquid and gaseous substances, for example, water, oil products, air, combustible gases, etc.
WUM motors can be used in various dispensers that dispense bulk materials, such as flour, drugs, etc.