CN100424248C

CN100424248C - Energy saving protector for idling motor of industrial sewing machine

Info

Publication number: CN100424248C
Application number: CNB021454175A
Authority: CN
Inventors: 吴玉书
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-11-12
Filing date: 2002-11-12
Publication date: 2008-10-08
Anticipated expiration: 2022-11-12
Also published as: CN1500928A

Abstract

The present invention relates to an energy-saving protector for an idling motor of an industrial sewing machine, which is composed of a power switch, a start button, a regulated power supply, a controlling and processing circuit IC2 with a relay J2, a timing controller, a sensor, a power supply self-locking controller, an output end, a speed changing circuit and a reset switch, wherein the power switch, the start button, the circuit of the regulated power supply, the controlling and processing circuit, the speed changing circuit and the output end (the motor) are electrically connected in order. The timing controller is connected with the controlling and processing circuit IC2 of which the input end is connected with the output end of the sensor; a controlled end of the power supply self-locking controller is connected with the controlling and processing circuit, and the output end of the power supply self-locking controller is connected to the regulated power supply; an output port of the controlling and processing circuit IC2 is connected to the motor on the output end through J2. When no cloth is fed by the cloth sending teeth of the sewing machine, the motor is decelerated and is in an energy-saving state, and the motor can obtain normal service voltage when cloth is fed. Compared with the prior art, the rotary speed of the motor can be controlled properly by the present invention, and the rotary speed of the motor is reduced when the motor is in zero load; thereby, the zero load loss of the motor can be reduced, and the motor can be prevented from being damaged caused by excess rise in temperature.

Description

The industrial sewing machines motor wastes energy-saving protector

Technical field:

The invention belongs to electronic technology energy-saving application field, relate in particular to a kind of industrial sewing machines motor and waste energy-saving protector.

Background technology:

The employed monopole asynchronous motor of industrial sewing machines such as clothing, shoemaking (being motor) now, be not provided with mostly and waste energy saver, reason owing to sewing tech, in use the no-load ratio of motor is bigger, the capacity of idle power consumption of motor is risen when making zero load because of the motor match power is excessive, both caused bigger reactive loss, and added losses and temperature rise make also fault rate increase greatly, influenced the service life of Sewing machines.

Summary of the invention:

The objective of the invention is to overcome the deficiency of prior art, can control motor rotary speed in good time, both reached and to reduce motor open circuit loss, can prevent the excessive intensification of motor again and cause the industrial sewing machines motor of damage to waste energy-saving protector thereby provide a kind of.

The present invention adopts following technical scheme to realize.This wastes energy-saving protector and comprises power switch, start button, and voltage-stabilized power supply is furnished with energy-saving relay J ₂Control processing circuit (processor IC ₂), timing controller, sensor, tape relay J ₁The power supply self-lock controller, with relay J ₂The output that joins (access electric motor) is with relay J ₂Compositions such as speed change circuit that joins and recovery switch, power switch wherein, start button, voltage-stabilized power supply circuit, control are handled between (device) circuit, speed change circuit (can be made of the speed change inductance) and the output (access motor) and are electrically connected for order, wherein timing controller (also claiming to waste timer) is connected with control processing (device) circuit, the output that wherein is located at the sensor at industrial sewing machine head place or work feed tooth place (or on transmission mechanism) is connected to the input of control processing circuit, wherein is with J ₁The controlled end of power supply self-lock controller be connected with control processing circuit, the input and the power switch of power supply self-lock controller join, and its output is connected to voltage-stabilized power supply circuit, wherein the control output port of handling (device) circuit also passes through J ₂Directly be connected on the motor of output, when Sewing machines work feed tooth did not have cloth and sends to, sensor (can discern the duty of transmission mechanism and head) can be handled (device) circuit (IC to control ₂) send into a low level signal, through IC ₂After the internal circuit comparison process, IC ₂Output port also the output low level signal by energy-saving relay J ₂Not conducting, J ₂The contact redirect, make motor have to low pressure and supply with that the motor reduction of speed is in power save mode, when Sewing machines work feed tooth has cloth to send into to need operate as normal by the speed change circuit, sensor is handled (device) IC circuit to control after obtaining (cloth is arranged on the work feed tooth) signal ₂Send into a high level signal, through IC ₂After the internal circuit comparison process, IC ₂Output port also export high level signal, allow energy-saving relay J ₂Must be electric, J ₂The closing of contact, motor obtains normal operating voltage and is in normal operating conditions.

Concrete control principle process of the present invention following (can referring to Fig. 1):

Power switch is closed, and press start button, make power control relay J ₁Must be electric, relay J ₁The closing of contact, behind voltage-stabilized power supply circuit to processor IC ₂The output control signal makes processor IC ₂The output high level, energy-saving relay J ₂Must be electric, energy-saving relay J ₂The closing of contact, motor gets electric startup running, the effect of power supply self-lock controller is: after start button is pressed, entire circuit is continued; Do not have cloth on the work feed tooth, output low level after sensor is judged makes processor IC ₂Also output low level, and make energy-conservation relay J ₂Not conducting, energy-saving relay J ₂The contact discharge (redirect), at energy-saving relay J ₂When the contact discharges, energy-saving relay J ₂Connect another road speed change circuit the low voltage supply motor is provided, and make the motor reduction of speed be in power save mode; When needs work on, only need cloth is delivered on the work feed tooth, sensor is sent into a high level signal, processor IC to treatment circuit after obtaining the work feed tooth signal of cloth is arranged from head ₂Obtain also exporting a high level signal behind the high level signal, make energy-conservation relay J ₂Must be electric, J ₂The closing of contact, motor obtain normal operating voltage, are in normal operating conditions; After one procedure, the operative employee fails in time cloth to be put into the work feed tooth, after sensor does not obtain that the signal of cloth is arranged on the work feed tooth, sends into a low level signal, processor IC to treatment circuit ₂After obtaining this low level signal, also export a low level signal, energy-saving relay J ₂Not conducting, J ₂The contact redirect, make motor obtain low pressure and supply with that the motor reduction of speed is in power save mode by the speed change circuit; Under power save mode, timing controller is set with the regular hour (as being set at 2 minutes), if sensor continues not obtain having on the work feed tooth signal of cloth, and control handles that (device) circuit obtains be low level signal after, timing controller is in time of setting (2 minutes) when reaching, power control relay J ₁Not conducting, J ₁The contact discharge, motor power is closed.

Compared with the prior art; after the present invention adopts and wastes energy-saving protector; can in time control motor rotary speed; the rotating speed of motor reduces when making zero load; both reached and to reduce motor open circuit loss; can prevent that again motor from excessively heating up and cause damage, and can be under energy-conservation (or not energy-conservation) state, when operating personnel leave loom and can be in the time of setting during powered-down powered-down automatically.

Description of drawings:

Below in conjunction with drawings and Examples the present invention is described in further detail; But industrial sewing machines motor of the present invention wastes energy-saving protector and is not limited to embodiment.

Fig. 1 is the circuit block diagram that these industrial sewing machines motor wastes energy-saving protector:

Fig. 2 is the circuit theory diagrams that these industrial sewing machines motor wastes energy-saving protector.

The specific embodiment:

Referring to accompanying drawing 1, Fig. 2 as can be known, the present invention's effect and functional characteristics of used relevant circuit or components and parts when specific design is as follows:

One, energy-saving relay J ₂, its role is to controlled processor IC ₂Export the control of high and low level, relay J ₂Adhesive and release (redirect) by the contact make motor obtain the voltage of rated speed or the voltage of low speed state.

Two, timing controller its role is under the motor low speed state, when processor does not receive the feedback signal of sensor, can close motor power in official hour, the reinstatement attitude.

Three, control processor IC ₂, its role is to receive transducing signal, and after its internal circuit identification is handled, pass through J from sensor N ₂Send control signal to output (motor).Through judgment processing, return control signal of timing controller.

Four, sensor its role is to receive from head of sewing machine, work feed tooth or transmission mechanism place working state signal, and to processor IC ₂Send feedback signal.

Five, restore switch, its role is to when shutdown or equipment break down, but the restorer normal operating conditions.

With reference to Fig. 2, circuit working principle process of the present invention is as follows: as start button K ₂When pressing, industrial alternating current is added in 1,2 two ends of transformer T, and it is electric that transformer 4,5 two ends are got, through the D of interior voltage-stabilized power supply ₃, D ₄, D ₅And D ₆After the bridge rectifier rectification of forming, again by C ₉Capacitor filtering, IC ₁Voltage stabilizing and C ₈Filtering again after, export constant DC and press, so control processing circuit IC ₂Must be electric, treatment circuit IC ₂The 8th pin just export a high level, make Q ₄Base stage gets electric, Q ₄Therefore conducting, J ₁Because Q ₄Conducting make the closing of contact, thereby pin power path, start button is discharged after, industrial alternating current still is added on the transformer T, D ₉Be Q ₄The protection diode.This moment J ₂The contact make motor directly be connected motor full-speed operation (motor operate as normal) with industrial alternating current.D ₇The diode D wherein of the same colour of dichromatic LED ₇B because the negative pole current potential by Q ₃Drag down and conducting is luminous, R ₁₃Be light emitting diode D ₇The power supply current-limiting resistance.

When needs continue operate as normal, cloth is delivered to the work feed tooth, Q in the Acquisition Circuit ₁Base stage received the signal of sensor N, deliver to Q through colelctor electrode after the amplification ₂Base stage amplify Q again ₂The signal of colelctor electrode after will amplifying pass through C ₂, D ₂Send into IC ₂The 12nd pin; R wherein ₁For the amplifier gain amount is regulated resistance, R ₄And C ₁Be the High frequency filter loop, can the filtering clutter, R ₂, R ₃Be biasing resistor, be used for regulating Q ₁And Q ₂The operating point.D ₁Be booster diode, but both filtering reverse reflux also can improve impulse amplitude slightly.R ₅And C ₃A filtering noise jamming is advanced in the shunt-resonant circuit of forming, and also can play the function of signal lag.R ₆Pull-up resistor for the I2 pin.

Work as IC ₂12 pin received after the work feed tooth do not have the signal of cloth IC ₂The 10th pin just export a control signal, pass through R ₁₁, D ₁₀And Q ₃, make J ₂Contact action, make motor be connected on 2,3 two of transformer, thereby reduce motor speed, motor is in power save mode.R ₁₂Because Q ₃By and obtain a high level, make Q ₆Conducting, two-color diode D ₇D ₇The A light emitting diode is bright.Under power save mode, when surpassing setting-up time, the R of timing controller ₈Receive IC ₂The 10th pin signal, and send into Q ₅Base stage makes Q ₅End C ₆Therefore begin stored charge, speed is by R ₇Value control, work as C ₆On electric charge when running up to certain voltage after a while, send into IC ₂The 6th pin, IC ₂After receiving, the 8th pin is just exported a low level, allows Q ₄End J ₁Because Q ₄By and the contact discharges, motor and all control circuit dead electricity and close.

Claims

1. an industrial sewing machines motor wastes energy-saving protector, and it comprises power switch, start button, and voltage-stabilized power supply is characterized in that: be furnished with energy-saving relay J ₂Control processing circuit (IC ₂), timing controller, sensor, tape relay J ₁The power supply self-lock controller, the output that joins with relay J 2 is with relay J ₂Speed change circuit that joins and recovery switch are formed, power switch wherein, start button, voltage-stabilized power supply circuit, control processing circuit, be that order is electrically connected between speed change circuit and the output, wherein timing controller is connected with control processing circuit, the output of sensor is connected to the input of control processing circuit, wherein is with J ₁The controlled end of power supply self-lock controller be connected with control processing circuit, the input and the power switch of power supply self-lock controller join, and its output is connected to voltage-stabilized power supply, wherein the output port of control processing circuit passes through J ₂Be connected on the motor of output, when Sewing machines work feed tooth did not have cloth and sends to, sensor can be to control processing circuit IC ₂Send into a low level signal, treated device IC ₂After the internal circuit comparison process, IC ₂Output port also the output low level signal by energy-saving relay J ₂Not conducting, J ₂The contact redirect, make motor have to supply with and make the motor reduction of speed, when Sewing machines work feed tooth has cloth to send into to need operate as normal, after sensor obtains signal, to control processor circuit IC to low pressure by the speed change circuit ₂Send into a high level signal, through IC ₂After the internal circuit comparison process, IC ₂Output port also export high level signal, allow energy-saving relay J ₂Must be electric, J ₂The closing of contact, make motor obtain normal operating voltage and be in normal operating conditions.