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Out-of-step discrimination method for two-phase hybrid stepping motor

A technology of stepping motor and discriminating method, which is applied in the direction of motor generator testing, motor generator control, measuring electricity, etc. Effect

Active Publication Date: 2019-08-23
福州伊柯达信息技术有限公司
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The low-cost stepper motor servo system generally adopts open-loop control, but since the maximum output torque of the stepper motor decreases with the increase of speed, the response ability and the ability to resist load fluctuations under open-loop control conditions are poor, and the speed at medium and high speeds Increased pulsation, oscillation, etc.
During operation, if there is a sudden change in load, too large load, or an unreasonable motion speed planning curve, it will cause the stepping motor to lose step

Method used

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  • Out-of-step discrimination method for two-phase hybrid stepping motor
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  • Out-of-step discrimination method for two-phase hybrid stepping motor

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Embodiment Construction

[0027] The technical solution of the present invention will be specifically described below in conjunction with the accompanying drawings.

[0028] like figure 1 As shown, the present invention provides a two-phase hybrid stepper motor out-of-step discrimination method, which adopts two-phase sinusoidal current tracking open-loop control, uses two-phase voltage and current as input signals, and observes the two-phase The electric angle position of the rotor of the stepping motor, and then the estimated value of the rotor speed is obtained from the difference of the electric angle position of the rotor, and the relative error between the two is calculated with the given speed signal. If the relative error exceeds the set threshold, the two-phase step is identified. The open-loop control of the feed motor is out of step, and the motor drive is turned off; the specific implementation of this method is as follows:

[0029] The mathematical model of the AB phase of the two-phase h...

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Abstract

The invention relates to an out-of-step discrimination method for a two-phase hybrid stepping motor. A two-phase sine and cosine current tracking open-loop control is adopted. A two-phase voltage anda two-phase current are used as input signals. The electric angle position of the rotor of the two-phase hybrid stepping motor is observed through a nonlinear observer. The rotor electric angle position is differentiated to obtain a rotor speed estimation value, and a relative error between the rotor speed estimation value and a given speed signal is calculated. If the relative error exceeds a setthreshold value, the open-loop control of the two-phase stepping motor is judged to be out of step. The motor driving is closed, so that the safety of a low-cost stepping motor servo system is improved.

Description

technical field [0001] The invention relates to a step-out judging method of a two-phase hybrid stepping motor. Background technique [0002] The low-cost stepper motor servo system generally adopts open-loop control, but since the maximum output torque of the stepper motor decreases with the increase of speed, the response ability and the ability to resist load fluctuations under open-loop control conditions are poor, and the speed at medium and high speeds Increased pulsation, oscillation and other issues. During operation, if there is a sudden change in load, too large load, or an unreasonable motion speed planning curve, it will cause the stepper motor to lose its step. Contents of the invention [0003] The purpose of the present invention is to provide a two-phase hybrid stepping motor out-of-step discrimination method, which can improve the safety of the low-cost stepping motor servo system. [0004] In order to achieve the above object, the technical solution of ...

Claims

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Application Information

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IPC IPC(8): H02P8/38G01R31/34
CPCG01R31/343H02P8/38
Inventor 蒋学程周永森李兴桂
Owner 福州伊柯达信息技术有限公司
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