CN204231243U

CN204231243U - Be applied to the digitial controller of series machine

Info

Publication number: CN204231243U
Application number: CN201420786270.5U
Authority: CN
Inventors: 柯立超; 吴旦旦; 叶国文
Original assignee: Lishui University
Current assignee: Lishui University
Priority date: 2014-12-12
Filing date: 2014-12-12
Publication date: 2015-03-25
Anticipated expiration: 2024-12-12

Abstract

A kind of digitial controller being applied to series machine, comprise series machine, series machine connects BUCK circuit, BUCK circuit connects extraneous AC rectification input, this digitial controller also comprises single-chip microcomputer, be connected with optical coupling isolation circuit, drive circuit and braking circuit between single-chip microcomputer and series machine in turn, between described single-chip microcomputer and BUCK circuit, be connected with optical coupling isolation circuit and drive circuit in turn, described single-chip microcomputer is connected to on-off controller and speed-regulating signal input.

Description

Be applied to the digitial controller of series machine

Technical field

The utility model relates to motor control technology field, particularly relates to a kind of digitial controller being applied to series machine.

Background technology

At present, along with the develop rapidly of society, domestic sewing machine develops into present motor power by original pedal power, and power set wherein have employed series machine in a large number.The sewing machine industry of China is very flourishing, but still have employed fairly simple analog control system due to electric machine control system major part, and performance is coarse, and function is perfect not, have impact on the ability of existing product to high-end development.

Utility model content

The utility model will solve above-mentioned prior art Problems existing, provides a kind of digitial controller being applied to series machine, not only can realize measure voltage & current function, also can realize the precise controlling of motor, can also realize over-voltage over-current protection.

The utility model solves the technical scheme that its technical problem adopts: this digitial controller being applied to series machine, comprise series machine, series machine connects BUCK circuit, BUCK circuit connects extraneous AC rectification input, this digitial controller also comprises single-chip microcomputer, optical coupling isolation circuit, drive circuit and braking circuit is connected with in turn between single-chip microcomputer and series machine, be connected with optical coupling isolation circuit and drive circuit between described single-chip microcomputer and BUCK circuit in turn, described single-chip microcomputer be connected to on-off controller and speed-regulating signal input.

In order to perfect further, between single-chip microcomputer and series machine, be connected with sample circuit.

Perfect further, single-chip microcomputer adopts STM8S chip.

The function that series machine mainly realizes is stopping to motor, rotation, speed size control, therefore set carry out control voltage according to BUCK circuit size from 50V to 310V about.And add single-chip microcomputer STM8S to control in series machine, its kernel speed, up to 20MIPS, also has 130 leading nanometer technology manufacturing technologies.Because in the circuit of series machine, it can well work completely.We also add driving chip IR2110 in circuit, and the voltage range being supplied to it is 5V-15V, and have independently high-end and low side input channel.Because we add COMS pipe in circuit, and IR2100 driving chip can match with the level of COMS pipe.Because consider the forceful electric power of motor and the relation of light current, add optocoupler transducer, isolate forceful electric power and light current, optocoupler transducer can be changed between electrical-optical-electricity, therefore when ensureing its safety, more efficientlyly realizes its function.

The effect that the utility model is useful is: the utility model adopts the numerical control system based on High Performance SCM; the idle output that the pulsation of original analog controller input current seriously causes electrical network can be reduced; affect the problem of power grid quality; and by the high-precision AD detection module of single-chip microcomputer; not only can realize measure voltage & current function; also can realize the precise controlling of motor, can also over-voltage over-current protection be realized.Adopt the full-bridge uncontrollable rectifier in power electronic technology to add the main topology of buck circuit, utilize the excitation winding of series machine as stabilizing inducatnce, output voltage is linearly adjustable, and motor operates steadily, and improves the machining accuracy of sewing machine simultaneously.And PWM technology can realize the output of galvanic current current voltage, motor is run more steady, achieve the control for brake that analog controller cannot possess, the instantaneous stall of motor is rapid, meets the comfortable experience of user.

Accompanying drawing explanation

Fig. 1 is structure principle chart of the present utility model;

Fig. 2 is the schematic diagram of BUCK circuit in the utility model;

Fig. 3 is the schematic diagram that in the utility model, drive circuit is connected with braking circuit.

Embodiment

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

With reference to accompanying drawing 1: the digitial controller being applied to series machine in the present embodiment, comprise series machine, series machine connects BUCK circuit, BUCK circuit connects extraneous AC rectification input, this digitial controller also comprises single-chip microcomputer, optical coupling isolation circuit, drive circuit and braking circuit is connected with in turn between single-chip microcomputer and series machine, be connected with optical coupling isolation circuit and drive circuit between described single-chip microcomputer and BUCK circuit in turn, described single-chip microcomputer be connected to on-off controller and speed-regulating signal input.Sample circuit is connected with between single-chip microcomputer and series machine.Single-chip microcomputer adopts STM8S chip.

Wherein the generation Recent Epoch of 8 8-digit microcontrollers made by STM8S platform, up to the cpu performance of 20MIPS and the voltage range of 2.95-5.5V, contributes to existing 8 systems to the lower power supply transition of voltage.In the various product facilities such as household electrical appliance, heating ventilation air-conditioning system, industrial automation, electric tool, appliance for personal care and power control management system, what new product was equipped with enriches peripheral hardware and can support accurate control & monitor function.Function comprises 10 analog to digital converters, and the conversion used time is less than 3 microseconds; 16 advanced control timers can be used for motor control, catch/compare and PWM function.Except flexible design, the assembly of STM8S and be encapsulated on pin completely compatible, pin compatibility is of value to hardware and software platform design decision, and product platformization can save Time To Market, simplifies product up-gradation process, so select STM8S.

BUCK circuit is exactly the buck circuit that it has often been said, its schematic diagram as shown in Figure 2.This circuit uses a wholly-controled device V, is IGBT in figure, provide passage when VT turns off to the inductive current in load, be provided with fly-wheel diode VD.One of typical use of chopper circuit drags DC motor, also can be with accumulator load.When the t1=t moment, control V turns off, and load current is through diode VD afterflow, and load voltage U0 is approximately zero, and load current exponentially curve declines.In order to make load current continuous pulsation little, the inductance that series connection L value is larger usually.

In order to play a good braking effect, add a brake portion, and power supply is not disconnected, but power supply is maintained about 50V, because motor is not because have enough voltage, therefore motor also can not maintain rotation, after switch is closed, motor is also in running, and now electromotive force E is not 0, but due to the reason of brake resistance, the electromotive force of motor can very fast being released, play a good braking effect, and motor there is no enough voltage to be used for playing, therefore can play a good braking effect

The function that series machine mainly realizes is the stopping to motor, and rotate, the size of speed controls, therefore set carry out control voltage according to BUCK circuit size from 50V to 310V about.And add single-chip microcomputer STM8S to control in series machine, its kernel speed, up to 20MIPS, also has 130 leading nanometer technology manufacturing technologies.Because in the circuit of series machine, it can well work completely.We also add driving chip IR2110 in circuit, and the voltage range being supplied to it is 5V-15V, and have independently high-end and low side input channel.Because we add COMS pipe in circuit, and IR2100 driving chip can match with the level of COMS pipe.Because consider the forceful electric power of motor and the relation of light current, add optocoupler transducer, isolate forceful electric power and light current, optocoupler transducer can be changed between electrical-optical-electricity, therefore when ensureing its safety, more efficientlyly realizes its function.In order to enable us to see more intuitively the rotating speed of motor, because the size limitation of circuit board, the liquid crystal display screen that we select also is determine according to the size of circuit board, therefore also adds LCD1602 LCDs, the display of its mainly each term coefficient of realizing circuit.

Although the utility model has illustrated by reference to preferred embodiment and has described, those skilled in the art should understand, and in the scope of claims, can do the various change in form and details.

Claims

1. one kind is applied to the digitial controller of series machine, comprise series machine, series machine connects BUCK circuit, BUCK circuit connects extraneous AC rectification input, it is characterized in that: this digitial controller also comprises single-chip microcomputer, optical coupling isolation circuit, drive circuit and braking circuit is connected with in turn between single-chip microcomputer and series machine, be connected with optical coupling isolation circuit and drive circuit between described single-chip microcomputer and BUCK circuit in turn, described single-chip microcomputer be connected to on-off controller and speed-regulating signal input.

2. the digitial controller being applied to series machine according to claim 1, is characterized in that: be connected with sample circuit between described single-chip microcomputer and series machine.

3. the digitial controller being applied to series machine according to claim 1, is characterized in that: described single-chip microcomputer adopts STM8S chip.