CN203691313U

CN203691313U - Stepping motor controlled by single-chip microcomputer

Info

Publication number: CN203691313U
Application number: CN201420071611.0U
Authority: CN
Inventors: �原大明; 曾丽丽; 刘心红
Original assignee: Northeast Petroleum University
Current assignee: Northeast Petroleum University
Priority date: 2014-02-19
Filing date: 2014-02-19
Publication date: 2014-07-02
Anticipated expiration: 2024-02-19

Abstract

The utility model relates to a stepping motor controlled by a single-chip microcomputer. The stepping motor controlled by the single-chip microcomputer comprises a power supply circuit, a stepping motor driving circuit, a single-chip microcomputer master control circuit and a communication circuit. The single-chip microcomputer in the single-chip microcomputer master control circuit is connected with the power supply circuit, the stepping motor driving circuit and the communication circuit respectively. The power supply circuit is formed by a voltage transformation circuit, a rectification circuit, a filter circuit and a voltage stabilizing circuit. According to the voltage transformation circuit, a primary coil and a secondary coil form a small power transformer. According to the rectification circuit, four rectifier diodes D2 are used to form a bridge-type rectification circuit. The filter circuit converts a pulse voltage into a smooth direct voltage through connecting one electrolytic capacitor C16 in parallel. The voltage stabilizing circuit comprises two grades of voltage stabilizing circuits. A first grade voltage stabilizing circuit adopts a 78 series voltage stabilizer, an input terminal is connected in parallel with a 47pF decoupling capacitor C17 and an output terminal is connected in parallel with a decoupling capacitor C18 and a capacitor C 19. A second grade voltage stabilizing circuit adopts a LM7805 voltage stabilizer, a LM7805 output terminal is connected in parallel with 100uF and 0.1uF decoupling capacitors C20 and C21. The stepping motor possesses expandability, is good in stability and is with small vibration.

Description

Monolithic processor controlled stepping motor

Technical field:

The utility model relates to motor, what be specifically related to is monolithic processor controlled stepping motor.

Background technology:

Traditional stepping motor type of drive is that constant voltage drives, chip L298N drives or chip L297+L298N drives.Constant voltage drives must provide the triode of enough large electric current to carry out switch process, and motor rotation speed ratio is lower, shake greatlyr, generates heat greatly; Existing stepping motor adopts, and adopts chip L298N to drive, and generates heat larger, easily burns, and does not have segmentation pattern, and control precision is limited, and machine operation vibration is large; Adopt chip L297+L298N to drive, easily cause high frequency, burn out driving element, only have full step and partly walk function, do not have segmentation pattern, control precision is limited.

Control circuit mainly contains step-by-step controller, power amplifier and protective circuit and forms, complicated structure, and function ratio is more single, and operating accuracy is on the low side, and vibrations are large, and noise is higher, poor stability.

Summary of the invention:

The purpose of this utility model is to provide monolithic processor controlled stepping motor, and this monolithic processor controlled stepping motor is large for existing stepping motor vibrations, the problem of poor stability.

The utility model solves the technical scheme that its technical problem adopts: this monolithic processor controlled stepping motor comprises power circuit, stepper motor driving circuit, single-chip microcomputer governor circuit, telecommunication circuit, single-chip microcomputer in single-chip microcomputer governor circuit connects respectively power circuit, stepper motor driving circuit, telecommunication circuit, power circuit is made up of transforming circuit, rectification circuit, filter circuit, voltage stabilizing circuit, transforming circuit forms wattage transformer by primary coil and secondary coil, is the alternating voltage between suitable 12-40V by 220V AC voltage conversion; Rectification circuit adopts 4 1N4007 rectifier diode D2 to form bridge rectifier, the pulse voltage that is unidirectional variation by the positive and negative ac voltage rectifier alternately changing; Filter circuit, by 1 1000uF/50V electrochemical capacitor C16 in parallel, is transformed to level and smooth direct voltage by pulse voltage; Voltage stabilizing circuit comprises two-stage voltage stabilizing circuit, first order voltage stabilizing circuit is selected 78 serial pressurizers, the decoupling capacitor C17 of an input 47pF in parallel, output decoupling capacitor C18 in parallel and capacitor C 19, obtain the needed 9-16V direct voltage of stepping motor, second level voltage stabilizing circuit adopts LM7805 pressurizer, at LM7805 output decoupling capacitor C20 in parallel and C21,9-16V direct voltage is further transformed to 5V direct voltage, is single chip circuit power supply.

In such scheme, stepper motor driving circuit adopts chip THB6064H Driving Stepping Motor, by the state of single-chip microcomputer governor circuit control P3.5-P3.7 pin, to direction of rotation and the anglec of rotation of THB6064H transmitted signal control step motor.

In such scheme, in single-chip microcomputer governor circuit, single-chip microcomputer is distinguished external S1-S4 stand alone type key circuit, AT24C02A memory circuitry, LED circuit of LED.

The utlity model has following beneficial effect:

The utlity model has extensibility, can meet multiple needs.Adopt single-chip microcomputer executive program, produce step motor control signal, control flexibly, precision is high, good stability; The power supply strong interference immunity that power circuit provides, is difficult for agingly, vibrates little; Adopt THB6064 stepping motor to drive chip, peripheral circuit is very simple, and inside has unique semi-fluid lock function; That chip internal has is overheated, overcurrent, overvoltage crowbar, and good stability, is difficult for being burned; There are 8 kinds of segmentation patterns such as 2,8,10,16,20,32,40,64, during chip operation, can change segmentation number, more easily carry out precision control; There is low vibration, little noise superperformance.

Brief description of the drawings

Fig. 1 is system diagram of the present utility model;

Fig. 2 is power circuit diagram;

Fig. 3 is stepper motor driving circuit figure;

Fig. 4 telecommunication circuit figure.

Embodiment

Below in conjunction with accompanying drawing, the utility model is described further:

As shown in Figure 1, this monolithic processor controlled stepping motor comprises power circuit, stepper motor driving circuit, single-chip microcomputer governor circuit, telecommunication circuit, single-chip microcomputer in single-chip microcomputer governor circuit connects respectively power circuit, stepper motor driving circuit, telecommunication circuit, shown in Fig. 2, power circuit is by transforming circuit, rectification circuit, filter circuit, voltage stabilizing circuit forms, by 220V sinusoidal ac process transformation, rectification, filtering, after voltage stabilizing, obtain 9-36V DC power supply, for stepper motor driving circuit power supply, and obtain the needed 5V DC power supply of single-chip microcomputer by the adjustable depressor of LM7805.Transforming circuit forms wattage transformer by primary coil and secondary coil, is the alternating voltage between suitable 12-40V by 220V AC voltage conversion, rectification circuit adopts 4 1N4007 rectifier diode D2 to form bridge rectifier, the pulse voltage that is unidirectional variation by the positive and negative ac voltage rectifier alternately changing, filter circuit, by 1 1000uF/50V electrochemical capacitor C16 in parallel, is transformed to level and smooth direct voltage by pulse voltage, voltage stabilizing circuit comprises two-stage voltage stabilizing circuit, first order voltage stabilizing circuit is selected 78 serial voltage-stabilizing devices, the decoupling capacitor C17 of an input 47pF in parallel, output 100uF in parallel and 0.1uF decoupling capacitor C18 and C19, improve the direct voltage of power supply output, and then the needed 9-16V direct voltage of acquisition stepping motor, second level voltage stabilizing circuit adopts LM7805 voltage-stabilizing device, at LM7805 output 100uF in parallel and 0.1uF decoupling capacitor C20 and C21, improve the direct voltage of power supply output, 9-16V direct voltage is further transformed to 5V direct voltage, for single chip circuit power supply.

As shown in Figure 3, stepping motor drives and adopts chip THB6064H, comprise the circuit such as inner integrated segmentation, evanescent mode setting, circuit adjustment, CMOS power amplification, coordinate simple peripheral circuit can realize the drive circuit of high-performance, many segmentations, large electric current.Stepping motor drives and adopts chip THB6064H, by the state of single-chip microcomputer governor circuit control P3.5-P3.7 pin, to direction of rotation and the anglec of rotation of THB6064H transmitted signal control step motor.

Single-chip microcomputer governor circuit, the external S1-S4 of single-chip microcomputer stand alone type key circuit is realized the selection of stepping circuit operating state, comprises startup, stops, forward, reversion, acceleration, deceleration etc.; ; External 4 the common anode utmost point charactron circuit of single-chip microcomputer are realized the demonstration of system operational parameters, comprise ambient temperature, current time, direction of rotation, the anglec of rotation etc.; The external AT24C02A memory circuitry of single-chip microcomputer, realizes data backup and solves power failure data and lose problem; The external LED circuit of LED of single-chip microcomputer, realizes working state of system alarm prompt function.

As shown in Figure 4, telecommunication circuit adopts MAX232 chip, forms the telecommunication circuit of host computer and slave computer, realizes the real-time monitoring of system by serial ports.Host computer can send order to slave computer, the work of control step motor, and slave computer can be to the state information of host computer feedback stepping motor.

Claims

1. a monolithic processor controlled stepping motor, it is characterized in that: this monolithic processor controlled stepping motor comprises power circuit, stepper motor driving circuit, single-chip microcomputer governor circuit, telecommunication circuit, single-chip microcomputer in single-chip microcomputer governor circuit connects respectively power circuit, stepper motor driving circuit, telecommunication circuit, power circuit is made up of transforming circuit, rectification circuit, filter circuit, voltage stabilizing circuit, transforming circuit forms wattage transformer by primary coil and secondary coil, is the alternating voltage between suitable 12-40V by 220V AC voltage conversion; Rectification circuit adopts 4 1N4007 rectifier diode D2 to form bridge rectifier, the pulse voltage that is unidirectional variation by the positive and negative ac voltage rectifier alternately changing; Filter circuit, by 1 1000uF/50V electrochemical capacitor C16 in parallel, is transformed to level and smooth direct voltage by pulse voltage; Voltage stabilizing circuit comprises two-stage voltage stabilizing circuit, first order voltage stabilizing circuit is selected 78 serial pressurizers, the decoupling capacitor C17 of an input 47pF in parallel, output decoupling capacitor C18 in parallel and capacitor C 19, obtain the needed 9-16V direct voltage of stepping motor, second level voltage stabilizing circuit adopts LM7805 pressurizer, at LM7805 output decoupling capacitor C20 in parallel and C21,9-16V direct voltage is further transformed to 5V direct voltage, is single chip circuit power supply.

2. monolithic processor controlled stepping motor according to claim 1, it is characterized in that: described stepper motor driving circuit adopts chip THB6064H Driving Stepping Motor, by the state of single-chip microcomputer governor circuit control P3.5-P3.7 pin, to direction of rotation and the anglec of rotation of THB6064H transmitted signal control step motor.

3. monolithic processor controlled stepping motor according to claim 1, is characterized in that: the respectively external S1-S4 stand alone type of single-chip microcomputer key circuit, AT24C02A memory circuitry, LED circuit of LED in described single-chip microcomputer governor circuit.