A Calculation Method of Torque and Speed Characteristics of Radial Standing Wave Ultrasonic Motor
An ultrasonic motor, torque speed technology, applied in the direction of generator/motor, piezoelectric effect/electrostrictive or magnetostrictive motor, electrical components, etc., can solve the problems of no effective method, unable to calculate the performance of the motor, etc. Achieve the effects of strong adaptability, improved torque and speed performance, and high calculation efficiency
Active Publication Date: 2019-09-20
NANJING INST OF TECH
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Problems solved by technology
At present, there is no effective method for the calculation of the torque-speed characteristics of radial standing wave ultrasonic motors in rotary motion, which leads to the inability to accurately calculate the performance of the motor in the design and analysis stage of the motor
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[0030] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the examples given are not intended to limit the present invention.
[0031] Such as figure 1 As shown, a calculation method for the torque and speed characteristics of a radial standing wave ultrasonic motor includes the following steps:
[0032] Step 1, determine the basic parameters of the radial standing wave ultrasonic motor;
[0033] Step 2, calculating the deformation parameters of the elastic blade;
[0034] Step 3. Calculate the tangential driving force F of the elastic blade on the rotor tdrive and resistance force F tbl ock;
[0035] Step 4, take the initial value of the rotational speed N of the rotor as 0;
[0036] Step 5. Update the value of N and calculate the constant velocity critical time po...
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The invention discloses a method for computing torque and rotational speed characteristics of radial standing wave type ultrasonic motors. The method includes steps of 1, determining basic parametersof the radial standing wave type ultrasonic motors; 2, computing deformation parameters of elastic blades; 3, computing rotor tangential driving force F<tdrive> and block force F<tblock> of the elastic blades; 4, taking initial values of rotational speeds N of rotors as 0; 5, updating values of the rotational speeds N and computing constant-speed critical points t1 of the elastic blades and the rotors; 6, computing and recording values of output torque T of the motors; 7, judging the magnitude of the torque T, adding Q to the values of the rotational speeds N if the torque T is higher than 0,executing the step 5, or terminating computation if the torque T is not higher than 0. The output torque T of the motors corresponds to the rotational speeds N. The Q is larger than 0 and is smaller than or equal to 1. The method has the advantage that the torque-rotational speed characteristics of the radial standing wave type ultrasonic motors can be accurately computed b the aid of the method at design and analysis stages of the motors.
Description
technical field [0001] The invention relates to a calculation method for the torque and speed characteristics of a radial standing wave ultrasonic motor. Background technique [0002] Ultrasonic motors use the inverse piezoelectric effect of piezoelectric ceramics to excite ultrasonic vibrations of metal elastomers, and output driving force through frictional coupling to achieve rotational or linear motion. Compared with electromagnetic motors, ultrasonic motors have many advantages such as fast dynamic response, low-speed high-torque, power-off self-locking, and good electromagnetic compatibility. They have broad application prospects in the fields of discontinuous motion, precision control, and intelligent robots. [0003] There are many different types of ultrasonic motors, the most important of which are traveling wave type and standing wave type. The structure of the traveling wave ultrasonic motor is generally ring-shaped, and the motion form is rotary motion, and the...
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IPC IPC(8): H02N2/14
Inventor 蒋春容周良志张津杨陆旦宏
Owner NANJING INST OF TECH