CN2733743Y

CN2733743Y - Power saving apparatus for motor of industrial sewing machine

Info

Publication number: CN2733743Y
Application number: CN 200420079028
Authority: CN
Inventors: 江忠安
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-08-24
Filing date: 2004-08-24
Publication date: 2005-10-12
Anticipated expiration: 2014-08-24

Abstract

The utility model discloses a power saving apparatus for motor of industrial sewing machine. IN-A and IN-B two phase terminals of an alternating current power supply of a three-phase 380V are respectively output to OUT-A and OUT-B terminals by a bidirectional thyristor; the IN-C terminal is connected in series with a signal transformer TRANS1 and a bidirectional thyristor and output to the OUT-C terminal; the OUT-A terminal, the OUT-B terminal, and the OUT-C terminal are connected with a motor three-phase leading wire, and the IN-A and the IN-B compose an AC input fraction of a rectifier BR2 of a voltage signal circuit by voltage division, a current-limiting resistor, and a high voltage capacitor. The direct current output of the rectifier BR2 of the voltage signal circuit drives a control circuit of an optical coupling by a filtering capacitor C2, a voltage stabilizing diode, and a light-emitting diode; the IN-C input current is coupled in a current signal circuit by a coupling transformer TRANS1 of a current signal; the current is rectified to a direct current by the rectifier BR1 of the current signal circuit, and the direct current is filtered by a capacitor C1 and is output to push a switch triode V2 by an adjustable resistor W1; input sides of three optical couplings which are an LG-A, an LG-B, and an LG-C are connected in series in a line, and three optical couplings which are the LG-A, the LG-B, and the LG-C are respectively connected with a trigger circuit of phase shifting of three RC resistor-capacitor.

Description

Industry sewing machine electric motor saver

Technical field

The utility model relates to a kind of industrial electrical equipment, specifically a kind of electricity-saving appliance of industrial sewing machine.

Background technology

Along with the development of power electronic technology, power electronics is very extensive in the utilization of energy-saving field, as civilian aspect energy-conservation light-operated, audio-switch, electronic ballast for fluorescent lamp, fan electron speed regulator, desk lamp with dimmer switch, convertible frequency air-conditioner etc. is arranged; Industrial aspect has the frequency converter of Electric Traction, intermediate frequency furnace, far-infrared oven and all kinds of electronic compensators etc.

Industrial sewing machine is in manufacturings such as rag trade, handbag industry, footwear industry, toy industry, and a large amount of the use is the main production equipments of these industries.But in actual use, the motor utilization rate of industrial sewing machine is all very low, for example: flatcar is when work, substantially have only when sewing needle when cloth is made on, just use motor, when the workman did not make to cloth at arrangement cut-parts and pin, motor was in Light Condition basically, inactivity output.According to statistics, flatcar, MULTI NEEDLE FLAT AEWING MACHINE etc. are in working order the time, and the real service time of motor is less than half, and between 21% ~ 46%, motor idle running causes the significant wastage of power.

The utility model content

The purpose of this utility model provides a kind of industrial sewing machine electricity-saving appliance, at the special operating characteristic of industrial sewing machine, the characteristic that adopts controllable silicon copped wave to dam, on the basis that traditional capacitance-resistance phase shift triggers, increase by a cover kinetic-control system, to reach variation from motion tracking industry sewing machine motor load, realize accurate electricity consumption, significantly reduced the energy consumption of motor, reduced cost, remarkable economic efficiency has been arranged.

The technical solution of the utility model is as follows:

Industry sewing machine electric motor saver, the IN-A that it is characterized in that three-phase 380V AC power, IN-B two phase terminals output to 0UT-A through bidirectional triode thyristor respectively, the OUT-B terminal, the IN-C terminal series connection signal transformer TRANS1 bidirectional triode thyristor of connecting again outputs to the OUT-C terminal, OUT-A, OUT-B, the OUT-C terminal connects motor three phase terminals, IN-A is through dividing potential drop, current-limiting resistance and high-voltage capacitance and IN-B form the ac input division branch of voltage signal circuit rectifier BR2, the direct current output of voltage signal circuit rectifier BR2 through filter capacitor C2 and voltage stabilizing didoe after light-emitting diode promotes light idol control circuit; The IN-C input current is coupled to the current signal circuit through current signal coupling transformer TRANS1, BR1 is rectified into direct current by current signal circuit rectifier, by capacitor C 1 filtering, export pull switch triode V2 through adjustable resistance W1, LG-A, LG-B, three light idols of LG-C input side are connected in the circuit, LG-A, LG-B, three light idols of LG-C insert three RC rc phase-shift trigger circuits respectively, have three bidirectional trigger diodes respectively with the electric capacity parallel connection of each RC rc phase-shift trigger circuit, and receive respectively on the bidirectional triode thyristor of each phase line.

It is signal source that the utility model is got a phase load electric current I c, and photoelectric cell LG-A, LG-B, LG-C that controlled three-phase is triggered go here and there in a loop static simultaneously two used part parameter unanimities of electric capacity rc phase-shift trigger circuit circuit.Light idol element consistency will be got well, in manufacture process, require the coupling contact-making surface over against, and do not allow light leak.Design one voltage stabilizing didoe DW1 and electrochemical capacitor C2 are to keep the stable of control in dynamically triggering the driving loop, and design one is adjusted potentiometer W1 to adapt to different industrial sewing machine motors in the control signal circuit of tracking sampling.

The characteristics of this utility model:

One, the tracking sampling of load current and control, isolate main circuit and control circuit with signal transformer TRANS1, close the control utmost point that signal triggers three-phase controllable silicon V1-A, V1-B, V1-C simultaneously with the lotus root of a load current, make output OUT-A, OUT-B, the OUT-C voltage of three-phase controllable silicon consistent synchronously.

Two, three-phase light idol LG-A, LG-B, LG-C utilize the optical coupling control mode, realize the isolation of dynamic control signal and static control circuit, and improve the response speed and the control precision of control widely.

Three, utilize a phase current Ic and two-phase voltage Uab coordination control in addition, reach the adjusting of adjusting, can adapt to multiple different industrial sewing machine motor by precision potentiometer.

Four, on the basis that traditional single capacitor capacitance-resistance phase shift triggers, increase to two electric capacity rc phase-shift trigger circuits, when thyristor operating angle is too small, the supply voltage of circuits for triggering has been crossed peak value and has been fallen very lowly, cause C3-1, C3-2, C3-3 electric capacity charging voltage too small, be not enough to puncture DB-A, DB-B, DB-C, therefore it is enough big to be added with R4-A and C3-6, R4-B and C3-5, R4-C and C3-4 charge-discharge circuit voltage, can guarantee controllable silicon V1-A, V1-B, the reliable triggering and conducting of V1-C, increase the scope of regulation voltage.

In sum, industrial sewing machine motor private section electrical equipment to take into full account the multifrequency nature of various industrial sewing machine motors, has adaptability widely, and application prospect is very good.

Description of drawings

Accompanying drawing is the utility model circuit structure diagram.

Embodiment

Each component names among the figure:

1 input wire rod IN-A, IN-B, IN-C

2 current signal transformer TRANS1

3 current signal circuit rectifier bridge BR1

4 electrochemical capacitor C1

5 potentiometer W1

6 triode V2

7 resistance R 2

8 capacitor C 4

9 voltage signal circuit rectifier bridge BR2

10 voltage stabilizing didoe DW1

11 electrochemical capacitor C2

12 LEDs

13 light idol LG-A, LG-B, LG-C

14 resistance R 1

15 diode D1

16 LEDs 1

17 bidirectional triode thyristor V1-A, V1-B, V1-C

18 bidirectional trigger diode DB-A, DB-B, DB-C

19 resistance R 4-A, R4-B, R4-C

20 resistance R 5-A, R5-B, R5-C

21 resistance R 6-A, R6-B, R6-C

22 piezo-resistance RV-A, RV-B, RV-C

23 resistance R 3-A, R3-B, R3-C

24 diode D2-A, D2-B, D2-C

25 LED 3-A, LED3-B, LED3-C

26 output wire rod OUT-A, OUT-B, OUT-C

Circuit elements device annexation of the present utility model is seen accompanying drawing.

1. resistance R 4-A, R5-A and capacitor C 3-6, C3-3 constitute typical R C rc phase-shift trigger circuit among the figure, when IN-A, IN-B, IN-C input three-phase alternating-current supply, capacitor C 3-6, C3-3 are charged by resistance R 4-A, R5-A, when reaching certain value, bidirectional trigger diode DB-A punctures conducting, trigger bidirectional triode thyristor V1-A conducting, turn-off voluntarily during alternating voltage zero-crossing.When capacitor C 3-6, C3-3 reverse charging were to certain value during reversal of power, the DB-A reverse breakdown triggered bidirectional triode thyristor V1-A conducting, therefore is that static control circuit is realized economize on electricity thus when the sewing machine empty load of motor moves.

2. it is suitable that resistance R 6-A makes bidirectional triode thyristor V1-A trigger current; Piezo-resistance RV-A protection bidirectional triode thyristor V1-A avoids the damage of surge voltage.

3. the current signal that current signal transformer TRANS1 obtains load variations when sewing machine motor output loading generation dynamic change is treated to direct current signal through electrochemical capacitor filtering through current signal circuit rectifier bridge BR1, and potentiometer W1 and triode V2 control the break-make of light idol control circuit LG-A, LG-B, LG-C and regulate dynamic sensitivity.

4.IN-A constituting the voltage signal rectification circuit with the IN-B terminal after resistance R 2, capacitor C 4 current limliting dividing potential drops, input voltage exchanges input side, voltage signal circuit rectifier bridge BR2 DC side parallel capacitor C 2 and voltage stabilizing didoe DW1 provide voltage source for light idol control circuit LG-A, LG-B, LG-C, drive light idol control circuit LG-A, LG-B, LG-C through the LED2 light-emitting diode, monitor its operating state by the LED2 light-emitting diode.

5. light idol control circuit LG-A, LG-B, LG-C are subjected to the dynamic control of the control of current signal circuit and regulating circuit W1, V2 to circuits for triggering under this voltage source drives, reach the purpose of following the tracks of load variations and accurate electricity consumption, reduce the energy consumption of sewing machine motor to greatest extent.

6.R1, D1, LED1 constitute the power supply indication, R3-A, D2-A, LED3-A, R3-B, D2-B, LED3-B, R3-C, D2-C, LED3-C constitute the three-phase indication respectively.

Claims

1, industry sewing machine electric motor saver, the IN-A that it is characterized in that three-phase 380V AC power, IN-B two phase terminals output to OUT-A through bidirectional triode thyristor respectively, the OUT-B terminal, the IN-C terminal series connection signal transformer TRANS1 bidirectional triode thyristor of connecting again outputs to the OUT-C terminal, OUT-A, OUT-B, the OUT-C terminal connects motor three phase terminals, IN-A is through dividing potential drop, current-limiting resistance and high-voltage capacitance and IN-B form the ac input division branch of voltage signal circuit rectifier BR2, the direct current output of voltage signal circuit rectifier BR2 through filter capacitor C2 and voltage stabilizing didoe after light-emitting diode promotes light idol control circuit; The IN-C input current is coupled to the current signal circuit through current signal coupling transformer TRANS1, BR1 is rectified into direct current by current signal circuit rectifier, by capacitor C 1 filtering, export pull switch triode V2 through adjustable resistance W1, LG-A, LG-B, three light idols of LG-C input side are connected in the circuit, LG-A, LG-B, three light idols of LG-C insert three RC rc phase-shift trigger circuits respectively, have three bidirectional trigger diodes respectively with the electric capacity parallel connection of each RC rc phase-shift trigger circuit, and receive respectively on the bidirectional triode thyristor of each phase line.