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A method and system for tracking and controlling the maximum efficiency point of an ultrasonic motor under dynamic working conditions

An ultrasonic motor, tracking control technology, applied in the direction of generator/motor, piezoelectric effect/electrostrictive or magnetostrictive motor, electrical components, etc., can solve the problem of not considering the control effect, etc., to achieve the maximum working efficiency Effect

Active Publication Date: 2021-07-20
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In terms of optimal efficiency control, Senjyu et al first proposed the optimal efficiency control method in 2001, by adjusting the frequency online to find the minimum value of the driving voltage to achieve the optimal effect of efficiency, but the driving circuit of this method is controlled by a chopper converter and inverter, and does not consider the control effect under dynamic conditions

Method used

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  • A method and system for tracking and controlling the maximum efficiency point of an ultrasonic motor under dynamic working conditions
  • A method and system for tracking and controlling the maximum efficiency point of an ultrasonic motor under dynamic working conditions
  • A method and system for tracking and controlling the maximum efficiency point of an ultrasonic motor under dynamic working conditions

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Comparison scheme
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Embodiment 1

[0060] see figure 1 , this embodiment provides a tracking control method for the maximum efficiency point of an ultrasonic motor under dynamic working conditions. For the control principle, see figure 2 , the method includes the following steps:

[0061] Step 101: Sampling the rotational speed of the ultrasonic motor, comparing it with a given rotational speed, and using the obtained difference as the input of the PI controller;

[0062] Step 102: Using the output of the PI controller as the first input control quantity of the drive circuit to control the output voltage of the drive circuit;

[0063] Step 103: To the two-phase AC input voltage u of the ultrasonic motor FA , u FB Any phase, such as u FA Sampling, and calculate its voltage effective value U A ;

[0064] Step 104: Using the MEPT algorithm to calculate the average value of the voltage effective value at different times according to the voltage effective value And based on the average value of the voltage ...

Embodiment 2

[0099] see Figure 12 , this embodiment provides a tracking control system for the maximum efficiency point of an ultrasonic motor under dynamic working conditions, the system includes:

[0100] The first voltage regulation module 301 is used to sample the rotation speed of the ultrasonic motor and compare it with a given rotation speed, and use the obtained difference as the input of the PI controller; use the output of the PI controller as the first input of the drive circuit The control quantity controls the output voltage of the drive circuit;

[0101] The input voltage sampling module 302 is used to sample the two-phase AC input voltage of the ultrasonic motor and calculate its voltage effective value;

[0102] The driving frequency correction and updating module 303 is used to calculate the average value of the voltage effective value at different times according to the effective value of the voltage using the MEPT algorithm, and continuously correct and update the driv...

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Abstract

The invention discloses a method and system for tracking and controlling the maximum efficiency point of an ultrasonic motor under a dynamic working condition. The method includes: sampling the rotational speed of the ultrasonic motor, comparing it with a given rotational speed, and using the obtained difference as an input of a PI controller; using the output of the PI controller as the first input control quantity of the driving circuit to control the driving circuit Control the output voltage of the ultrasonic motor; sample the AC input voltage of the ultrasonic motor, and calculate its voltage effective value; use the MEPT algorithm to calculate the average value of the voltage effective value at different times according to the voltage effective value, and based on the average value of the voltage effective value at different times Correcting and updating the drive frequency; using the corrected and updated drive frequency as the second input control quantity of the drive circuit to adjust the output voltage of the drive circuit until the efficiency of the ultrasonic motor reaches the maximum value. The invention realizes the maximum working efficiency of the motor while controlling the rotating speed.

Description

technical field [0001] The invention relates to the technical field of ultrasonic motor control, in particular to a method and system for tracking and controlling the maximum efficiency point of an ultrasonic motor under dynamic working conditions. Background technique [0002] With the continuous development and implementation of the concept of energy saving and sustainable development in modern society, whether in industrial production or scientific research, improving the energy utilization efficiency of servo and speed control motor systems has attracted more and more attention from engineers and researchers. Because of its advantages such as low speed and high torque, no electromagnetic interference, power-off self-locking, fast response, and good speed and position control, ultrasonic motors are widely used in motion control fields such as aerospace, robots, and mobile electronic devices. application. However, due to its unique electromechanical energy conversion meth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02N2/14H02N2/16
CPCH02N2/142H02N2/145H02N2/16
Inventor 毛雪飞蔡春晨陈振赵雷刘向东
Owner BEIJING INSTITUTE OF TECHNOLOGYGY