CN201726115U

CN201726115U - Voltage fluctuation delay protective device of contactor

Info

Publication number: CN201726115U
Application number: CN201020229162XU
Authority: CN
Inventors: ***
Original assignee: Individual
Current assignee: De Watson Electrical Equipment (dalian) Co Ltd
Priority date: 2010-06-18
Filing date: 2010-06-18
Publication date: 2011-01-26
Anticipated expiration: 2020-06-18

Abstract

The utility model relates to a voltage fluctuation delay protective device of a contactor, which comprises a voltage fluctuation delay protective circuit and a single-coil contactor, wherein the voltage fluctuation delay protective circuit comprises a rectifier filter circuit, a transformation rectifier circuit, a high and low voltage DC conversion circuit, a detection circuit, an energy-storage circuit, a delay control circuit, a safety protection circuit, a fault alarm circuit and the like. When the detection circuit detects that the external power supply generates the voltage fluctuation fault, the energy-storage circuit automatically supplies power, the power supply time is adjusted and controlled by the delay control circuit to ensure that the contactor delays the breaking of the circuit when the voltage is fluctuated; when the DC power supply breaks down or the working temperature is abnormal, the AC power supply is automatically switched so as to ensure the continuous normal operation of the contactor and output fault signals to the outside; and the starting pull-in and maintaining pull-in of the single-coil electromagnetic contactor are completed by high and low voltage DC, and the system is automatically switched to the low voltage DC to supply power after the high voltage DC completes the starting pull-in.

Description

A kind of contactor shakes electric delay protection device

Technical field

The utility model relates to motor control loop and motor main circuit switch, relates in particular to a kind of contactor and shakes electric delay protection device.

Background technology

Electromagnetic contactor is switch (class) electrical equipment of extensive use, industrial its major control to as if motor, when control loop applies control during voltage, contactor adhesive, major loop conducting, motor work; When the control loop outage, contacts of contactor discharges automatically, and major loop disconnects, and motor is shut down;

The control loop of universal contactor adopts Alternating Current Power Supply, and energy consumption height during operation, noise are big.

In actual production, usually because the rolling electrical phenomena appears in voltage ripple of power network, at this moment, passive release causes the passive shutdown of motor to contactor because control loop voltage descends, and threatens safety in production.

At present because the release time of generally being longer than contactor operate time of the power transfer device of upstream electrical network, so the application of apparatus for fast switching at present still can not solve because of shaking the passive halting problem that electricity causes.

The utility model content

Technical problem to be solved in the utility model provides a kind of contactor and shakes electric delay protection device; make when the rolling electricity takes place; continued power to the contactor control circuit; contactor continues to keep attracting state; motor main circuit keeps path, waits for the recovery of power transfer device execution or outer power supply.

The technical scheme that the utility model solves the problems of the technologies described above is as follows: a kind of contactor shakes electric delay protection device, comprises electric delay protection circuit of rolling and unicoil contactor, and the electric delay protection circuit that shakes comprises circuit for detecting, delay control circuit and accumulator; When wherein, accumulator is used for taking place the rolling electricity unicoil contactor is powered; Circuit for detecting is used to detect externally fed and whether has rolling electricity, and provides control signal for delay control circuit; Delay control circuit is used for controlling accumulator to unicoil contactor supplying time according to the control signal of circuit for detecting.

The beneficial effects of the utility model are: when circuit for detecting detected major loop generation rolling electricity, the time-delay when rolling is electric of accumulator automatic power, assurance contactor was opened circuit, and plays the effect of the electric delay protection of rolling.

On the basis of technique scheme, the utility model can also be done following improvement.

Further, the electric delay protection circuit of described rolling also comprises: the current rectifying and wave filtering circuit, the unicoil electromagnetic contactor that are used for providing when the unicoil electromagnetic contactor starts adhesive high-voltage DC power supply provide the transformation rectification circuit of low-voltage dc power supply to reach the high-low pressure DC switching circuit that high voltage direct current is switched to low-voltage direct after the adhesive of unicoil electromagnetic contactor when keeping adhesive.

The beneficial effect that adopts above-mentioned further scheme is that the contactor control loop is adopted direct current supply fully, high voltage startup, and low pressure keeps, and has solved the noise and the energy consumption problem of common contactor, and can save power consumption.

Further, the electric delay protection circuit of described rolling also comprises and is used for breaking down or switching to the safety protection circuit of Alternating Current Power Supply and transmission of data signals and the failure alarm circuit that receives the safety protection circuit signal and report to the police automatically during working temperature abnormity when direct current supply.

The beneficial effect that adopts above-mentioned further scheme is to break down or during working temperature abnormity, automatically switch to Alternating Current Power Supply when device direct current supply, guarantees the normal continuously operation of contactor.

Description of drawings

Fig. 1 shakes electric delay protection device structured flowchart for a kind of contactor of the utility model;

In the accompanying drawing, the list of parts of each label representative is as follows:

1, current rectifying and wave filtering circuit, 2, the transformation rectification circuit, 3, the high-low pressure DC converting circuit, 4, circuit for detecting, 5, delay control circuit, 6, accumulator, 7, safety protection circuit, 8, failure alarm circuit, 9, the electromagnetic contactor coil.

Embodiment

Below in conjunction with accompanying drawing principle of the present utility model and feature are described, institute gives an actual example and only is used to explain the utility model, is not to be used to limit scope of the present utility model.

As shown in Figure 1, contactor shakes electric delay protection device and comprises: shake electric delay protection circuit and unicoil contactor 9 two parts.

Shake electric delay protection circuit by current rectifying and wave filtering circuit 1, transformation rectification circuit 2, high-low pressure DC switching circuit 3, circuit for detecting 4, accumulator 6, delay control circuit 5, safety protection circuit 7 and failure alarm circuit 8 are formed; When circuit for detecting 4 detects major loop generation rolling electricity, accumulator 6 automatic powers, power-on time is regulated control by delay control circuit 5, and the time-delay when rolling is electric of assurance contactor 9 is opened circuit, and plays the effect of the electric delay protection of rolling.

This device has perfect security protection and fault alarm function, breaks down or during working temperature abnormity, automatically switches to Alternating Current Power Supply when system's direct current supply, guarantees the normal continuously operation of contactor 9.

Current rectifying and wave filtering circuit 1: form by rectification filtering unit and protection components and parts, for system provides stable high-voltage DC power supply.

Transformation rectification circuit 2: form by transformation, rectification filtering unit and auxiliary element, for system provides many groups stable low-voltage dc power supply.

High-low pressure DC switching circuit 3: form by relay, logical circuit; Finish the galvanic switching of high and low pressure by the action of relay.

Circuit for detecting 4: form by a plurality of elements and logical circuit, for delay control circuit provides control signal.Its data-signal, signal input end are connected with the transformation rectification circuit, and data-signal, control signal output ends are connected with delay control circuit 5; In the course of work, it accepts the data-signal from the transformation rectification circuit, and through handling to delay control circuit 5 outputs; When its signal input end received signal from transformation rectification circuit 2, to delay control circuit 5 outputs, delay control circuit 5 picked up counting.

Accumulator 6: form by a plurality of energy-storage travelling wave tubes and auxiliary element, be main circuit power supply energy reserve when unusual, and have the automatic power function.

Delay control circuit 5: form by logical circuit, single-chip microcomputer and demonstration LED; When the rolling electricity takes place in power supply outside, by delay time control accumulator 6 power-on times of setting in advance.Its data-signal, signal input end are connected with circuit for detecting 4, and the data-signal output is connected with accumulator 6; In the course of work, its data-signal input is accepted the data-signal from circuit for detecting continuously, when its signal input end receives control signal from circuit for detecting, pick up counting, when timing finishes to high-low pressure DC switching circuit 3 output control signals.

Safety protection circuit 7: form by relay, thermistor, temperature safety element and logical circuit; When system's direct current supply is broken down or during working temperature abnormity, safety protection circuit 7 actions, system automatically switches to Alternating Current Power Supply, guarantees the normal continuously operation of contactor 9.Its signal input end is connected with transformation rectification circuit 2, and output is connected with failure alarm circuit; In the course of work, when temperature safety element moves in its signal input end receives from transformation rectification circuit 2 signals or circuit, automatically switch to Alternating Current Power Supply, and to the failure alarm circuit output signal.

Failure alarm circuit 8: form by display element and logical circuit; Clear and definite system failure information in time is provided, and provides and to fail the fault-signal source outward.Its data-signal input is connected with safety protection circuit 7; In the course of work, when it receives data-signal from safety protection circuit 7, report to the police automatically.

The control loop of unicoil electromagnetic contactor 9 adopts direct current supply fully, high voltage startup, and low pressure keeps.

The utility model is when the major loop normal power supply:

Current rectifying and wave filtering circuit 1 is to 9 power supplies of electromagnetic contactor coil, and contactor is finished adhesive; 3 actions of high-low pressure DC converting circuit, transformation rectification circuit 2 is to 9 power supplies of electromagnetic contactor coil, and control loop switches to low-voltage power supply, keeps in touch the adhesive of device.When internal system occurs when unusual, safety protection circuit 7 moving doing, control loop automatically switches to Alternating Current Power Supply, and contactor still keeps adhesive, and major loop does not disconnect, and guarantees the continuity of producing, simultaneous faults warning circuit 8 output fault alarm information.

When the rolling electrification takes place in power supply outside:

Circuit for detecting 4 detects outer the power supply when rolling electrification takes place, and to delay control circuit 5 and accumulator 6 output signals, accumulator 6 keeps in touch device and still is in attracting state from 9 power supplies of trend electromagnetic contactor coil, waits for the recovery of external electrical network; In the delay time of setting, mains supply recovers just often, and the utility model automatically restores to normal operating conditions; Because of major loop remains path, motor can start in the short time automatically during outer service restoration, has avoided the passive shutdown of motor.

When reaching predefined delay time, delay control circuit 5 is to accumulator 6 output signals, and accumulator 6 is stopped power supply, and this device is in the shutdown dormant state.

Particularly along with the extensive use of the fast cutting apparatus of power supply of upstream electrical network, the utility model has better been brought into play the protective effect of electric power system, and energy-efficient, the tool application prospects.

The above only is preferred embodiment of the present utility model, and is in order to restriction the utility model, not all within spirit of the present utility model and principle, any modification of being done, is equal to replacement, improvement etc., all should be included within the protection range of the present utility model.

Claims

1. a contactor shakes electric delay protection device, comprises electric delay protection circuit of rolling and unicoil contactor, it is characterized in that the electric delay protection circuit that shakes comprises circuit for detecting, delay control circuit and accumulator; When wherein, accumulator is used for taking place the rolling electricity unicoil contactor is powered; Circuit for detecting is used to detect externally fed and whether has rolling electricity, and provides control signal for delay control circuit; Delay control circuit is used for controlling accumulator to unicoil contactor supplying time according to the control signal of circuit for detecting.

2. contactor according to claim 1 shakes electric delay protection device; it is characterized in that the electric delay protection circuit of described rolling also comprises: the current rectifying and wave filtering circuit, the unicoil electromagnetic contactor that are used for providing when the unicoil electromagnetic contactor starts adhesive high-voltage DC power supply provide the transformation rectification circuit of low-voltage dc power supply to reach the high-low pressure DC switching circuit that high voltage direct current is switched to low-voltage direct after the adhesive of unicoil electromagnetic contactor when keeping adhesive.

3. contactor according to claim 1 and 2 shakes electric delay protection device; it is characterized in that the electric delay protection circuit of described rolling also comprises and is used for breaking down or switching to the safety protection circuit of Alternating Current Power Supply and transmission of data signals and the failure alarm circuit that receives the safety protection circuit signal and report to the police automatically during working temperature abnormity when direct current supply.