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Driver of stepping motor

A stepping motor and driver technology, applied in the direction of motor generator control, electrical components, control systems, etc., to achieve the effects of reduced rotation noise, stable rotation, and improved performance

Inactive Publication Date: 2014-06-11
高玉琴
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to improve the signal generator in the prior art and provide a new driver for the stepping motor, which can make the rotation of the stepping motor stable and vibration-free on the basis of a small increase in cost. noise reduction

Method used

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Embodiment Construction

[0017] The specific embodiment of the present invention will now be described in conjunction with the accompanying drawings.

[0018] The stepper motor driver of the present invention includes a power amplifier for driving the stepper motor, and a signal generator for outputting control signals to the power amplifier.

[0019] The power amplifier converts the voltage delivered by the signal generator into a current in a certain ratio, so that the windings of the stepping motor generate a magnetic field. , b terminals A, / A, B, / B are connected, the center taps of the stepper motor windings a and b are connected to the power supply VE, and the collectors of the transistors T1-T4 are respectively connected to the power supply VE for freewheeling. The diodes D9-D12, the bases of the triodes T1-T4 are respectively connected to the output terminals of the analog switches IC6, IC7, IC8 and IC9 through the resistors R10, R13, R25 and R28, and the emitters of the triodes T1-T4 are res...

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Abstract

The invention relates to a driver of a stepping motor. The driver is used for controlling the rotation of the stepping motor. The driver comprises a power amplifier used for driving the stepping motor and a signal generator used for outputting a control signal to the power amplifier. The driver is characterized in that the signal generator comprises voltage generation circuits (1,2) capable of generating different voltage values and voltage output switching circuits (3, 4); and the voltage generation circuits (1,2) are current addition operation circuits controlled by a single-chip microcomputer and can respectively output voltage Um Cos alpha and voltage Um sin alpha. After power amplification by the power amplifier, a combined magnetic field generated by a stepping motor winding is enabled to have constant magnetic field intensity. Meanwhile, through the combination of the magnetic field, the stepping angle of the stepping motor can be subdivided. The driver of the invention has the advantages of low manufacturing cost, simple structure and reliable use.

Description

technical field [0001] The invention relates to a driver of a stepping motor, which is composed of electronic components and used to control the rotation of the stepping motor. Background technique [0002] In the liquid chromatography analysis system, a stepper motor is used to drive the constant flow pump. In this case, the angle control accuracy of the stepper motor is not high. In consideration of the manufacturing cost of the stepper motor driver, the following methods are usually used: image 3 The driver shown in the circuit mainly includes a power amplifier for driving the stepper motor and a signal generator for controlling the power amplifier. The signal generator is a single-chip microcomputer IC1, and the single-chip microcomputer is provided with a program to make four ports on the single-chip microcomputer Output the level corresponding to the binary number; the power amplifier includes four triodes T1-T4, and the collectors of the triodes are respectively conne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P8/22
Inventor 高玉琴
Owner 高玉琴
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