Ultrasonic motor precision locating device
A precision positioning and motor technology, applied in the direction of generator/motor, non-electric variable control, position/direction control, etc., can solve the problems of motor speed reduction, stop running, output torque reduction, etc., and achieve simple and compact circuit structure, The effect of high positioning accuracy and simple control algorithm
Inactive Publication Date: 2007-05-09
ZHEJIANG UNIV
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Problems solved by technology
When the motor speed decreases, the output torque will decrease sharply or even stop running, and the relationship between them has a serious nonlinear relationship, which makes the precise positioning control strategy very complicated, and still cannot achieve good precision positioning control effect
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[0015] As shown in Fig. 3 and Fig. 4, the present invention includes a single-chip microcomputer system 1, an analog switching circuit 2, a signal conversion circuit 3, and a control command interface circuit 4; And the signal conversion circuit 3, another road signal (Y) sent from the high-frequency drive signal generator is connected to the analog switching circuit 2, and the single-chip microcomputer system 1 is respectively connected with the analog switching circuit 2, the signal conversion circuit 3, and the control command interface circuit 4, and the external The control command is connected to the control interface circuit 4, and the output terminal of the analog switching circuit 2 is connected to the high-voltage power amplifier.
[0016] The single-chip microcomputer system 1 is 89C2051, the analog switching circuit 2 is a 4052 chip, and the signal conversion circuit 3 is composed of a 74LS14 chip, a rectifier diode and a voltage stabilizing diode.
[0017] Wherein...
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An accuracy positioning device for ultrasonic motor consists of a single chip computer system, an analog switching circuit, a signal converting circuit, control command interface, an input forconnecting the high frequency driving signal to the controller and its output end connected with the input end of high voltage power amplifier. The device is actually a controller with CPU which can control the functions of continuous run, one step run (step by step type) and stop for the ultrasonic motor through the external commands. The one step run is realized by counting the high frequency driving signal through the single chip computer system and controlling the analog switch circuit so the step anale with very high resolution rate produced by one step run ensures the high accuracy of positioning for the ultrasonic motor. The positining accuracy can be reached up to 0.005 degree.
Description
technical field [0001] The invention relates to an ultrasonic motor control device, which is a precision positioning device suitable for the ultrasonic motor. Background technique [0002] Ultrasonic Motor (USM for short) is a new type of direct friction drive motor developed in recent years. Its operation must have a special high-frequency drive signal generation circuit and a high-voltage power amplifier circuit. These two parts are referred to as USM for short. Drive controller (shown in Figure 1). Generally, USM manufacturers provide corresponding USM drive controllers, but these drive controllers have little or no consideration for the control requirements in practical applications. For example, most drives only provide on and off control for USM operation, but when the motor is turned off, there is often overshoot due to inertia, and the amount of overshoot is related to the magnitude of the applied load, so it cannot be realized by accurately turning off the motor P...
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IPC IPC(8): H02N2/14G05D3/00
Inventor 魏燕定郭吉丰
Owner ZHEJIANG UNIV