CN209134048U - A kind of automatic reclosing protective device - Google Patents

Abstract

This application discloses a kind of automatic reclosing protective devices, comprising: power supply, voltage sampling circuit, voltage comparator circuit, control output circuit and driving motor；Wherein, the power supply is connected with the voltage comparator circuit, the control output circuit and the driving motor respectively；The voltage sampling circuit is connected with the input terminal of power grid and the voltage comparator circuit respectively；The output end of the voltage comparator circuit is connected with the input terminal of the control output circuit；The output end of the control output circuit is connected with the driving motor.The automatic reclosing protective device so as to which cost can be greatly reduced, and can effectively evade software algorithm risk out of control, it is ensured that automatic reclosing protective device reliability of operation based entirely on hardware circuit.

Description

A kind of automatic reclosing protective device

Technical field

This application involves overvoltage/undervoltage protection technique field, in particular to a kind of automatic reclosing protective device.

Background technique

For protection electric line and the Electrical Safety of user equipment, electricity consumption danger is reduced, needs to carry out electrical equipment Over-voltage and under-voltage protection.Currently, generally carrying out overvoltage/undervoltage protection by automatic reclosing protective device.However, existing automatic Reclosing protector mostly uses software algorithm control, needs not only to make using microprocessor and other peripheral hardware circuits At the increase of equipment cost, but also the risk out of control there are software algorithm, using electric equipment, there are Electrical Safety hidden danger.

In view of this, how to provide a kind of automatic reclosing protective device, cost is reduced, improving operational reliability is ability Field technique personnel technical problem urgently to be resolved.

Utility model content

The purpose of the application is to provide a kind of automatic reclosing protective device, can reduce cost, improves operational reliability, Ensure effective implementation of overvoltage/undervoltage protection.

In order to solve the above technical problems, this application provides a kind of automatic reclosing protective devices, comprising:

Power supply, voltage sampling circuit, voltage comparator circuit, control output circuit and driving motor；

Wherein, the power supply respectively with the voltage comparator circuit, the control output circuit and the driving motor It is connected；The voltage sampling circuit is connected with the input terminal of power grid and the voltage comparator circuit respectively；The voltage compares The output end of circuit is connected with the input terminal of the control output circuit；The output end of the control output circuit and the driving Motor is connected.

Optionally, the power supply is specially AC-DC power module.

Optionally, the voltage sampling circuit includes:

The sampling resistor of preset quantity, and each sampling resistor be serially connected after be connected to the power grid zero curve and fire Between line.

Optionally, the voltage comparator circuit includes:

Voltage comparator and two-way reference voltage；Wherein, the input terminal of the voltage comparator respectively with two roadbed The output end of quasi- voltage and the voltage sampling circuit is connected, the output end of the voltage comparator and control output electricity The input terminal on road is connected.

Optionally, the voltage comparator is specially LM393 type voltage comparator.

Optionally, the control output circuit includes:

Switching tube, the switching tube are connected with the voltage comparator and the driving motor respectively.

Optionally, the switching tube is metal-oxide-semiconductor.

Optionally, further includes:

The alarm being connected with the control output circuit.

Automatic reclosing protective device provided herein, comprising: power supply, voltage sampling circuit, voltage comparator circuit, Control output circuit and driving motor；Wherein, the power supply respectively with the voltage comparator circuit, the control output circuit And the driving motor is connected；The voltage sampling circuit input terminal phase with power grid and the voltage comparator circuit respectively Even；The output end of the voltage comparator circuit is connected with the input terminal of the control output circuit；The control output circuit Output end is connected with the driving motor.

Obviously, compared to the conventional solution based on software algorithm in conjunction with hardware circuit, it is provided herein from Dynamic reclosing protector samples network voltage by voltage sampling circuit, is carried out using voltage comparator circuit to network voltage Voltage compares, and then exports corresponding level signal to output circuit is controlled, to pass through the corresponding control of control output circuit output Signal processed makes driving motor drive mechanical plug-in strip closing or opening, realizes overvoltage/undervoltage protection to driving motor.The automatic reclosing Protective device is based entirely on hardware circuit, and so as to which cost can be greatly reduced, and it is out of control effectively to evade software algorithm Risk, it is ensured that automatic reclosing protective device reliability of operation.

Detailed description of the invention

It in order to more clearly explain the technical solutions in the embodiments of the present application, below will be to needed in the embodiment Attached drawing is briefly described, it should be apparent that, the drawings in the following description are only some examples of the present application, for ability For the those of ordinary skill of domain, without creative efforts, it can also be obtained according to these attached drawings other attached Figure.

Fig. 1 is a kind of schematic diagram of automatic reclosing protective device provided by the embodiment of the present application；

Fig. 2 is the schematic diagram of another kind automatic reclosing protective device provided by the embodiment of the present application.

Specific embodiment

The purpose of the application is to provide a kind of automatic reclosing protective device, can be effectively reduced cost, and improving operation can By property, it is ensured that effective implementation of overvoltage/undervoltage protection.

To keep the purposes, technical schemes and advantages of the embodiment of the present application clearer, below in conjunction with the embodiment of the present application In attached drawing, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described embodiment is Some embodiments of the present application, instead of all the embodiments.Based on the embodiment in the application, those of ordinary skill in the art Every other embodiment obtained without making creative work, shall fall in the protection scope of this application.

Referring to FIG. 1, Fig. 1 is a kind of schematic diagram of automatic reclosing protective device provided herein；It can with reference to Fig. 1 Know, which includes: power supply 10, voltage sampling circuit 20, voltage comparator circuit 30, control output circuit 40 and driving motor 50；Wherein, power supply 10 respectively with voltage comparator circuit 30, control output circuit 40 and driving motor 50 It is connected；Voltage sampling circuit 20 is connected with the input terminal of power grid and voltage comparator circuit 30 respectively；Voltage comparator circuit 30 Output end is connected with the input terminal of control output circuit 40；The output end of control output circuit 40 is connected with driving motor 50.

The course of work based on above structure, the automatic reclosing protective device is as follows:

Power supply 10 is voltage comparator circuit 30, control output circuit 40 and motor provide voltage of corresponding size, is made each The function of circuit can be realized normally.10 real-time sampling network voltage of voltage sampling circuit, and the electric main of power grid is converted After DC voltage, sampled voltage, i.e. DC voltage are exported, until voltage comparator circuit 30.Voltage comparator circuit 30 compares this and adopts The size of sample voltage and reference voltage, judges whether this sampled voltage is greater than over-voltage reference voltage and whether is less than under-voltage benchmark Voltage, that is, judge whether network voltage is in normal range (NR), further, for the output of voltage comparator circuit 30 and comparison result Corresponding level signal extremely control output circuit 40.Control output circuit 40 exports corresponding according to the level signal received Signal is controlled to driving motor, to control the operating status of driving motor 50, and then drives mechanical plug-in strip using driving motor 50 Closing or opening achievees the purpose that controlling electrical equipment is powered or powers off.

Specifically, power supply 10 is connected with voltage comparator circuit 30, control output circuit 40 and driving motor 50 respectively, it is Voltage comparator circuit 30, control output circuit 40 and driving motor 50, which are connected, provides operating voltage of corresponding size, for example, being Voltage comparator circuit 30 and control output circuit 40 provide the operating voltage of 5V respectively, provide the work of 12V for driving motor 50 Voltage.Wherein, for the concrete type of power supply 10, the application does not do unique restriction, can be implemented as above-mentioned each circuit and provides phase Answer the voltage of size.

In a kind of specific embodiment, power supply 10 is AC-DC power module.

Specifically, specifically using AC-DC power module to provide voltage of corresponding size for each circuit in the present embodiment.It please join Fig. 2 is examined, Fig. 2 is the schematic diagram of another kind automatic reclosing protective device provided by the embodiment of the present application, in conjunction with Fig. 2, AC-DC Power module is connected with power grid and voltage comparator circuit 30, control output circuit 40 and driving motor 50 respectively, and being responsible for will The alternating voltage of power grid is converted into the DC voltage of 5V and 12V, and exports the DC voltage of 5V respectively to voltage comparator circuit 30 With control output circuit 40, the DC voltage of 12V is exported to driving motor 50.

Voltage sampling circuit 20 is connected with the input terminal of power grid and voltage comparator circuit 30 respectively, for acquiring power grid electricity It presses and exports sampled voltage to voltage comparator circuit 30.

In a kind of specific embodiment, voltage sampling circuit 20 includes the sampling resistor of preset quantity, and respectively sampling Resistance is connected between the zero curve of power grid and firewire after being serially connected.

Specifically, in the present embodiment, voltage sample is electric referring to FIG. 2, further reducing the cost to simplify circuit structure Road 20 specifically includes the sampling resistor of preset quantity, each sampling resistor be connected to after being serially connected power grid zero curve and firewire it Between, in this voltage sampling circuit 20 between certain two neighboring resistance, i.e., the input terminal of voltage comparator circuit 30 is connected to It can be achieved to be DC voltage and the purpose for exporting the DC voltage to voltage comparator circuit 30 by the AC conversion of power grid.Its In, the tool of the particular number of sampling resistor and voltage comparator circuit 30 and this voltage sampling circuit 20 in motor sample circuit 20 Body link position can carry out adaptable setting according to practical application request, and the application does not do unique restriction.

The input terminal of voltage comparator circuit 30 is connected with voltage sampling circuit 20, the output end of voltage comparator circuit 30 and control The input terminal of output circuit 40 processed is connected, and is responsible for the sampled voltage exported according to voltage sampling circuit 20, judges that network voltage is It is no to be in normal range (NR), if the case where there are under-voltage or over-voltages.And further export corresponding level signal to control output Circuit 40.

In a kind of specific embodiment, above-mentioned voltage comparator circuit 30 includes: voltage comparator and two-way benchmark electricity Pressure；Wherein, the input terminal of voltage comparator is connected with the output end of two-way reference voltage and voltage sampling circuit 20 respectively, electricity The output end of comparator is pressed to be connected with control output circuit 40.

Specifically, referring to FIG. 2, voltage comparator circuit 30 includes voltage comparator and two-way benchmark electricity in the present embodiment Pressure: the first reference voltage and the second reference voltage, i.e., under-voltage reference voltage and over-voltage reference voltage；The input terminal of voltage comparator It is connected respectively with the output end of this first reference voltage, the second reference voltage and voltage sampling circuit 20, corresponds to above-mentioned electricity The embodiment of sample circuit 20 is pressed, it is specific that the input interface all the way of voltage comparator is connected in each concatenated sampling resistor Between certain two neighboring resistance.The sampled voltage and this under-voltage benchmark electricity that voltage comparator respectively exports voltage sampling circuit 20 Pressure and over-voltage reference voltage be compared, if voltage sampling circuit 20 export sampled voltage be greater than over-voltage reference voltage or The sampled voltage that voltage sampling circuit 20 exports is less than under-voltage reference voltage, then voltage comparator exports high level；And if voltage The sampled voltage that sample circuit 20 exports is greater than under-voltage reference voltage and is less than over-voltage reference voltage, i.e., network voltage is located at normal Voltage range when, voltage comparator export low level.

For the concrete type of voltage comparator, the application is not specifically limited, and can carry out difference according to the actual situation Property setting.

In a kind of specific embodiment, voltage comparator is LM393 type voltage comparator.

Specifically, LM393 type voltage comparator is twin voltage comparator integrated circuit, therefore over-voltage reference voltage can be connected It is connected to the IN_A+ pin of LM393 type voltage comparator, under-voltage reference voltage is connected to the IN_B- of LM393 type voltage comparator Pin draws the IN_A- pin that the input terminal of voltage sampling circuit 20 is connected to LM393 type voltage comparator with IN_B- Foot, so as to using this LM393 type voltage comparator it is synchronous by sampled voltage respectively with over-voltage reference voltage and with it is under-voltage Reference voltage is compared, and exports corresponding level signal respectively with OUT_B pin by its OUT_A pin.

The input terminal of control output circuit 40 is connected with voltage comparator circuit 30, and output end is connected with driving motor 50.Control Output circuit 40 processed is used to output control signals to driving motor 50 according to the level signal that voltage comparator circuit 30 exports, with control The operating status of driving motor 50 processed, makes driving motor 50 that mechanical plug-in strip be driven to be opened or closed, and sets to reach control electricity consumption The standby purpose being powered or power off.

In a kind of specific embodiment, control output circuit 40 includes: switching tube, and switching tube is respectively compared with voltage Circuit 30 and driving motor 50 are connected.

Specifically, in the present embodiment, control output circuit 40 includes switching tube, and switching tube respectively with voltage comparator circuit 30 and driving motor 50 be connected.Switching tube carries out conducting or the pass of itself according to the level signal that voltage comparator circuit 30 exports It is disconnected, and then realize being turned on or off for 50 coil voltage of driving motor, to control driving motor rotation or stop.

For the concrete type of switching tube, the application is equally not specifically limited, and it is suitable to select according to the actual situation The switching tube of type.

In a kind of specific embodiment, above-mentioned switching tube is metal-oxide-semiconductor.

Specifically, the present embodiment specifically selects metal-oxide-semiconductor to carry out the control that 50 coil voltage of driving motor is turned on or off.Tool For body, when voltage comparator circuit 30 exports high level, i.e., the sampled voltage that voltage sampling circuit 20 exports is greater than over-voltage base Quasi- voltage or when being less than under-voltage reference voltage, metal-oxide-semiconductor conducting, and then driving motor 50 are powered rotation, and mechanical plug-in strip is driven to disconnect, The power circuit of electrical equipment disconnects.Revert to less than over-voltage reference voltage when the sampled voltage that voltage sampling circuit 20 exports and Greater than under-voltage reference voltage state when, voltage comparator circuit 30 export low level, metal-oxide-semiconductor disconnect, and then driving motor 50 supply Electricity cut-off, mechanical plug-in strip closure, the power circuit of electrical equipment are restored to normal utilization voltage, and electrical equipment operates normally.

It is to be appreciated that the two-way output of above-mentioned voltage comparator have logic or relationship, i.e. voltage comparator OUT_A pin and the level signal of OUT_B pin output be logic or relationship, OUT_A pin exports high level or OUT_B Pin output high level can be such that metal-oxide-semiconductor is connected, and when OUT_A pin and OUT_B pin export low level, metal-oxide-semiconductor is closed It is disconnected.

In conclusion automatic reclosing protective device provided herein, samples power grid electricity by voltage sampling circuit Pressure carries out voltage comparison to network voltage using voltage comparator circuit, and then exports corresponding level signal to control output electricity Road, to make driving motor drive mechanical plug-in strip closure by the corresponding control signal of control output circuit output to driving motor Or disconnect, realize overvoltage/undervoltage protection.The automatic reclosing protective device is based entirely on hardware circuit, so as to can be greatly reduced Cost, and can effectively evade software algorithm risk out of control, it is ensured that automatic reclosing protective device reliability of operation.

On the basis of the above embodiments, optionally, automatic reclosing protective device further include: with control output circuit 40 connected alarms.

Specifically, can also for automatic reclosing protective device be arranged alarm, and by this alarm be connected to control it is defeated Circuit 40 out, thus when the sampled voltage that voltage sampling circuit 20 exports is greater than over-voltage reference voltage or is less than under-voltage reference voltage When, voltage comparator circuit 30 exports high level, and the control corresponding control alarm of output circuit 40 is alarmed, such as control output Switching tube closure in circuit, alarm, which connects operating voltage, makes this situation of user's timely learning to carry out warning reminding. Wherein, above-mentioned alarm can be buzzer or can also be indicator light etc., in this regard, the application does not do unique restriction, no matter Which type of alarm is chosen, does not influence the implementation of the technical program.

Because situation is complicated, it can not enumerate and be illustrated, those skilled in the art should be able to be, it is realized that mention in the application It combines actual conditions to may exist multiple examples under the basic principle of the embodiment of confession, is not paying enough creative works Under, it should within the scope of application.

Each embodiment is described in a progressive manner in specification, the highlights of each of the examples are with other realities The difference of example is applied, the same or similar parts in each embodiment may refer to each other.

Automatic reclosing protective device provided herein is described in detail above.It is used herein specifically The principle and implementation of this application are described for a example, the application that the above embodiments are only used to help understand Method and its core concept.It should be pointed out that for those skilled in the art, not departing from the application original Under the premise of reason, can also to the application, some improvement and modification can also be carried out, these improvement and modification also fall into the application right and want The protection scope asked.

It should also be noted that, in the present specification, relational terms such as first and second and the like be used merely to by One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning Covering non-exclusive inclusion, so that the process, method, article or equipment for including a series of elements not only includes that A little elements, but also other elements including being not explicitly listed, or further include for this process, method, article or The intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...", is not arranged Except there is also other identical elements in the process, method, article or equipment for including element.

Claims (8)

1. a kind of automatic reclosing protective device characterized by comprising

Power supply, voltage sampling circuit, voltage comparator circuit, control output circuit and driving motor；

Wherein, the power supply is connected with the voltage comparator circuit, the control output circuit and the driving motor respectively； The voltage sampling circuit is connected with the input terminal of power grid and the voltage comparator circuit respectively；The voltage comparator circuit Output end is connected with the input terminal of the control output circuit；The output end of the control output circuit and the driving motor phase Even.

2. automatic reclosing protective device according to claim 1, which is characterized in that the power supply is specially AC-DC electricity Source module.

3. automatic reclosing protective device according to claim 2, which is characterized in that the voltage sampling circuit includes:

The sampling resistor of preset quantity, and each sampling resistor be serially connected after be connected to the power grid zero curve and firewire it Between.

4. automatic reclosing protective device according to claim 3, which is characterized in that the voltage comparator circuit includes:

Voltage comparator and two-way reference voltage；Wherein, the input terminal of the voltage comparator is electric with the two-way benchmark respectively The output end of pressure and the voltage sampling circuit is connected, the output end of the voltage comparator and the control output circuit Input terminal is connected.

5. automatic reclosing protective device according to claim 4, which is characterized in that the voltage comparator is specially LM393 type voltage comparator.

6. automatic reclosing protective device according to claim 5, which is characterized in that the control output circuit includes:

Switching tube, the switching tube are connected with the voltage comparator and the driving motor respectively.

7. automatic reclosing protective device according to claim 6, which is characterized in that the switching tube is metal-oxide-semiconductor.

8. automatic reclosing protective device according to claim 7, which is characterized in that further include:

The alarm being connected with the control output circuit.