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Ultrasonic motor system for efficiency optimization control

An ultrasonic motor, efficiency optimization technology, applied in piezoelectric effect/electrostrictive or magnetostrictive motors, generators/motors, electrical components, etc.

Inactive Publication Date: 2010-12-29
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide an ultrasonic motor system with optimal efficiency control to solve the problem that the prior art cannot really achieve optimal control of efficiency

Method used

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  • Ultrasonic motor system for efficiency optimization control
  • Ultrasonic motor system for efficiency optimization control
  • Ultrasonic motor system for efficiency optimization control

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Embodiment Construction

[0015] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0016] figure 1 The ultrasonic motor system is shown in the figure. The motor is a widely used two-phase traveling wave ultrasonic motor, which adopts the drive circuit of H-bridge phase-shift PWM structure, as shown in the "phase-shift PWM generator" and "H-bridge drive" links in the figure. The phase-shift PWM generator receives the frequency command value given by the "frequency adjustment unit" and the duty cycle command value given by the "duty cycle adjustment" unit, and generates the corresponding phase-shift PWM control signal to drive the H bridge according to these command values. circuit. The power electronic devices in the H-bridge drive circuit are turned on and off under the control of these PWM control signals, and the high-frequency and high-voltage driving voltage is applied to the A and B phases of the ultrasonic motor to make the ultrason...

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Abstract

The invention relates to the field of ultrasonic motor control, in particular to an ultrasonic motor system for efficiency optimization control. The ultrasonic motor system comprises a two-phase traveling wave ultrasonic motor, an H-bridge drive circuit for providing drive for the ultrasonic motor, an H-bridge phase shifting PWM control signal generator for providing a control signal for the drive circuit, and a control system of the ultrasonic motor, wherein the control system of the ultrasonic motor comprises a rotating speed closed loop and a voltage closed loop. An efficiency optimization controller capable of improving efficiency is added in the drive voltage control, and a rotating speed feed-forward controller for compensating efficiency optimization control influence is added into the rotating speed closed loop control so as to reliably realize efficiency optimization control of the ultrasonic motor.

Description

technical field [0001] The invention relates to the field of ultrasonic motor control, in particular to an ultrasonic motor system with optimized efficiency control. Background technique [0002] Ultrasonic motor USM is a new type of motion control actuator, which has a working principle and structure different from traditional electromagnetic motors. The characteristics of USM make it have a wide range of application prospects in the field of high-end and general motion control. [0003] Improving the efficiency of motor drive systems to save energy is a goal that researchers are relentlessly pursuing. Although the ultrasonic motor has many advantages, the operation efficiency of the ultrasonic motor motion control system is much lower than that of the traditional electromagnetic motor. At present, the main applications of ultrasonic motors, such as cameras, watches, automotive electronics, and the Mars Pathfinder in the United States, are all limited energy supply occasi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N2/14
Inventor 史敬灼刘博田葳石静王海彦
Owner HENAN UNIV OF SCI & TECH
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