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High-speed driving method for stepper motor

A technology of stepping motor and driving method, which is applied in the direction of motor generator control, electrical components, control system, etc., can solve problems such as lost steps, and achieve the effects of fast response speed, improved processing accuracy, and large control range.

Inactive Publication Date: 2017-05-31
UNIV OF SHANGHAI FOR SCI & TECH
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention is aimed at the problem of step loss in the state of extremely fast motion of the stepping motor, and proposes a method for driving the stepping motor at an extremely high speed, which ensures that the stepping motor responds quickly and does not lose steps under the state of extremely fast operation.

Method used

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  • High-speed driving method for stepper motor
  • High-speed driving method for stepper motor

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Embodiment Construction

[0012] Due to the own characteristics of the stepping motor, it is determined that the pulse will be lost in the high-speed motion state, and sometimes the frequency is too high to cause the motor to block. Connect the incremental encoder and the stepping motor through a mechanical structure, and ensure that the stepping motor and the encoder rotate synchronously. When the motor rotates through a step angle, the corresponding encoder will feed back one or more signals to the controller. The controller uses the feedback signal as a trigger signal to control the drive motor to rotate through the next step angle. The feedback signal of the encoder is used as the pulse signal of the stepper driver to form a closed control to prevent loss of pulses. Due to the high speed of the encoder feedback signal, after the motor rotates through a step angle, it will receive several encoder feedback signals almost simultaneously to drive the next step angle.

[0013] A stepper motor driving m...

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Abstract

The invention relates to a high-speed driving method for a stepper motor. According to the method, an encoder is mechanically connected with the stepper motor and rotates synchronously with the stepper motor, and a stepping driver drives the stepper motor to rotate by one step angle each time a controller outputs a pulse to the stepping driver; when the stepper motor rotates by one step angle, the encoder follows to feed one or more signals back to the controller synchronously, and the controller takes the feedback signals as a trigger signal to output the next pulse to control and drive the motor to rotate by the next step angle. With adoption of the method, the problem of step loss when the stepper motor rotates at a high speed is solved well, control precision is guaranteed, the rotating speed control range of the motor is enlarged, the response speed is high, precise positioning is facilitated, the method can be widely applied to the fields of numerical control machining and the like, and the machining precision is improved effectively.

Description

technical field [0001] The invention relates to a motor driving method, in particular to a stepping motor extreme speed driving method. Background technique [0002] Working principle of stepper motor: stepper motor is an open-loop control motor that converts electrical pulse signals into angular displacement or linear displacement. The speed and stop position of the motor only depend on the frequency and number of pulses of the pulse signal. When the stepper driver receives a pulse signal, it drives the stepper motor to rotate a fixed angle in the set direction, which is called "step distance". Angle", its rotation runs step by step at a fixed angle. The open-loop system composed of stepper motor and drive circuit has been widely used in the field of industrial control because of its simple structure and low price. Stepper motors are often used in precise positioning occasions, and it is very important to ensure that the motor does not lose steps. When the stepper motor i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P8/38
CPCH02P8/38
Inventor 金政宇蔡锦达张菁王德铭贾文涛方佳伟罗小洪
Owner UNIV OF SHANGHAI FOR SCI & TECH
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