CN108387810A - A kind of contactor electricity-saving appliance detection circuit - Google Patents
A kind of contactor electricity-saving appliance detection circuit Download PDFInfo
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- CN108387810A CN108387810A CN201810139788.2A CN201810139788A CN108387810A CN 108387810 A CN108387810 A CN 108387810A CN 201810139788 A CN201810139788 A CN 201810139788A CN 108387810 A CN108387810 A CN 108387810A
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
- H01H47/02—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay
- H01H47/04—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay for holding armature in attracted position, e.g. when initial energising circuit is interrupted; for maintaining armature in attracted position, e.g. with reduced energising current
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/66—Testing of connections, e.g. of plugs or non-disconnectable joints
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
- H01H47/22—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for supplying energising current for relay coil
Abstract
The invention discloses a kind of contactor electricity-saving appliance detection circuits, it is existing contactor electricity saver circuit is constituted with rectifier bridge and main power circuit on the basis of, it is further added by a rectification circuit, sample circuit and threshold value comparison circuit, there are benchmark one and benchmark two inside threshold value comparison circuit, when the output end signal crest voltage of sample circuit is more than benchmark for the moment, the main power circuit work is controlled, contactor is attracted；When the output end signal threshold voltage of sample circuit is less than benchmark two, control main power circuit is closed, contactor release；It is required that the output end signal voltage of sample circuit is equal when the output end signal crest voltage of sample circuit with input voltage is direct current when input voltage is exchange, so that the electrical voltage point of triggering contactor action is the same, realize that wide input voltage contactor is attracted in alternating current-direct current input voltage and release voltage point is all than more consistent purpose, and circuit is easy to use, to finally realize the general of AC/DC contactor electricity-saving appliance product, production and the warehousing pressure of manufacturer are reduced.
Description
Technical field
A kind of design communication contactor of the present invention field, and in particular to contactor electricity-saving appliance detection circuit.
Background technology
Traditional contactors operating system is made of coil, fixed core, armature and reaction spring.When contactor coil is powered
Afterwards, suction is generated between fixed core and armature, when suction is more than reactive spring force, armature is attracted to fixed core, Zhi Daoyu
Until fixed core contacts, at this moment main contact is closed, this process is known as attracting process.Coil is persistently powered, armature and fixed core
It is kept in contact, the process that main contact is kept closed, referred to as holding course.When electric current is reduced or is interrupted in coil, quiet iron
The heart reduces the suction of armature, and when suction is less than reactive spring force, armature returns to open position, and main contact is separated, this
Process is known as release process.From the perspective of electrical, contactor coil can be equivalent to an inductance for having certain internal resistance.
The input voltage range of traditional contactors is narrow, and the contactor of same through-current capability can be according to the operation electricity of coil
The multiple specifications of pressure point.By taking CJ20 contactors common on the market as an example, the voltage specification of general coil is as shown in table 1.In order to suitable
With different input voltages, the product of multiple specifications is needed.
1 coil manipulation voltage rating of table
| Coil manipulation voltage rating US | |
| Exchange input | 36VAC、127VAC、220VAC、380VAC |
| Direct current inputs | 48VDC、110VDC、220VDC |
Coil operating voltage range is also narrow simultaneously, ranging from 85%~110%US of general pick-up voltage, release electricity
Pressure is 20%~75%US.Find out from above data, the working range of traditional contactors coil is narrow, and specification is more.
The working range of traditional contactors is narrow to be caused by current following input voltage variation due to contactor coil, defeated
Enter voltage it is high when electric current it is big, coil be easy fever damage；When input voltage is low, the small actuation of suction is unreliable.In recent years, band PWM
The contactor technology of control also gradually comes into vogue.PWM control technologies are used, coil current can be permanent in a wide range
Fixed, wide pressure ratio (maximum input voltage/minimum input voltage) can reach 9.A simply example is lifted, as long as coil design is suitable,
In the range of input voltage is 30V~270V, coil current can be constant.Therefore, the big factory of certain contactors releases quasi-
The voltage range of the product of wide input range voltage, coil normal work is 80V~275V, and release voltage is 40~60V, and
It is required that input AC/DC universal, either alternating voltage or DC voltage input, being attracted will be consistent with the threshold value of release.
Similar to the contactor product of this wide input voltage, voltage detecting circuit is generally required to detect input voltage, control contact
Device
It is attracted and discharges.
But there are one problems for AC/DC universal.In the case that effective voltage is certain, the peak value of combined-voltage is different
, such as the alternating current that virtual value is 80V, peak value 113V.In the case of AC/DC universal, if using simple partial pressure
It samples, compare threshold value, then under exchange input condition, will be triggered at lower voltages, lead to exchange input and direct current
The operation voltage of input is inconsistent.
Invention content
Have in view of that, the technical problem to be solved by the present invention is under exchange input and direct current input condition, realization connects
The operation voltage of tentaculum can be consistent.
In order to realize above-mentioned goal of the invention, technical scheme is as follows：
A kind of contactor electricity-saving appliance detection circuit, contactor electricity-saving appliance include the first rectifier bridge and main power circuit, are used for
The electric current of control contactor coil；It is characterized in that：Further include the second rectifier bridge, sample circuit and threshold value comparison circuit；First
It is connected with input voltage after the ac input end parallel connection of rectifier bridge and the second rectifier bridge, the positive output end of the first rectifier bridge and main work(
Rate circuit be connected, the positive output end of the second rectifier bridge is connected with the input terminal of sample circuit, the negative output terminal of the first rectifier bridge and
Altogether, the output end of sample circuit is connected the negative output terminal of second rectifier bridge with the input terminal of threshold value comparison circuit, threshold value comparison
The output end of circuit is connected with main power circuit；There are benchmark one and benchmark two inside threshold value comparison circuit, it is defeated when sample circuit
Outlet signal peak voltage is more than benchmark for the moment, and threshold value comparison circuit output controls signal control main power circuit work, contact
Device is attracted；When the output end signal valley point voltage of sample circuit is less than benchmark two, threshold value comparison circuit output controls signal control
Main power circuit processed is closed, contactor release；Input voltage be exchange when sample circuit output end signal crest voltage with it is defeated
The output end signal voltage for entering sample circuit when voltage is direct current is equal.
It, can be in an output end zener diode in parallel for sample circuit, zener diode as the improvement of said program
Cathode connect the output end of sample circuit, the plus earth of zener diode.
As the first specific embodiment of sample circuit, it is made of resistance R1, resistance R2 and capacitance C1, resistance R1
The input terminal of sample circuit, the connection of the one end capacitance C1 and resistance R1 and resistance R2 are formed with two endpoints after resistance R2 series connection
Point is connected, capacitance C1 other ends ground connection.
Further include zener diode Z1, two pole of voltage stabilizing as the improvement of above-mentioned the first specific implementation mode of sample circuit
Pipe Z1 is parallel to the both ends C1, and the wherein cathode of zener diode Z1 is connected with the tie point of resistance R1, resistance R2 and capacitance C1, surely
Press the plus earth of diode Z1.
As second of specific embodiment of sample circuit, it is made of inductance L1, resistance R3 and resistance R4, inductance
L1, resistance R3 and resistance R4 be sequentially connected in series after two endpoints formed sample circuit input terminal, the company of resistance R3 and resistance R4
Contact is the output end of sample circuit.
Further include zener diode Z1, two pole of voltage stabilizing as the improvement of second of specific implementation mode of above-mentioned sample circuit
Pipe Z1 is parallel to the both ends resistance R4, and the wherein cathode of zener diode Z1 is connected with the tie point of resistance R3, resistance R4, voltage stabilizing two
The plus earth of pole pipe Z1.
Another technical solution as the same inventive concept of the application is as follows：
A kind of contactor electricity-saving appliance detection circuit, contactor electricity-saving appliance include the first rectifier bridge and main power circuit, are used for
The electric current of control contactor coil；It is characterized in that：Further include the first diode, the second diode, sample circuit and threshold value ratio
Compared with circuit；The input terminal of first rectifier bridge is separately connected the anode of the first diode and the second diode, and the first rectifier bridge is just
Output end is connected with main power circuit, the negative output terminal ground connection of the first rectifier bridge, the cathode of the first diode and the second diode
The output end of input end grounding through sample circuit after being connected, sample circuit is connected with the input terminal of threshold value comparison circuit, threshold
The output end of value comparison circuit is connected with main power circuit；There are benchmark one and benchmark two inside threshold value comparison circuit, when sampling electricity
The output end signal crest voltage on road is more than benchmark for the moment, and threshold value comparison circuit output controls signal and controls the main power circuit
Work, contactor are attracted；When the output end signal threshold voltage of sample circuit is less than benchmark two, the control of threshold value comparison circuit output
Signal controls main power circuit and closes, contactor release；The output end signal peak value electricity of sample circuit when input voltage is exchange
Pressure with input voltage for direct current when the output end signal voltage of sample circuit it is equal.
It, equally can be in an output end zener diode in parallel for sample circuit, voltage stabilizing two as the improvement of said program
The cathode of pole pipe connects the output end of sample circuit, the plus earth of zener diode.
As the first specific embodiment of sample circuit, it is made of resistance R1, resistance R2 and capacitance C1, resistance R1
It connects with resistance R2, resistance R1 connects the cathode connection of the first diode and the second diode with one end after resistance R2 series connection
Other end ground connection after point, resistance R1 and resistance R2 series connection, the one end capacitance C1 are connected with the tie point of resistance R1 and resistance R2, electricity
Hold C1 other ends ground connection.
Further include zener diode Z1, two pole of voltage stabilizing as the improvement of above-mentioned the first specific implementation mode of sample circuit
Pipe Z1 is parallel to the both ends C1, and the wherein cathode of zener diode Z1 is connected with the tie point of resistance R1, resistance R2 and capacitance C1, surely
Press the plus earth of diode Z1.
As second of specific embodiment of sample circuit, it is made of inductance L1, resistance R3 and resistance R4, the one or two
The cathode connection of pole pipe and the second diode is grounded after inductance L1, resistance R3 and resistance R4 successively, resistance R3 and resistance R4
Tie point be sample circuit output end.
Further include zener diode Z1, two pole of voltage stabilizing as the improvement of above-mentioned the first specific implementation mode of sample circuit
Pipe Z1 is parallel to the both ends resistance R4, and the wherein cathode of zener diode Z1 is connected with the tie point of resistance R3, resistance R4, voltage stabilizing two
The plus earth of pole pipe Z1.
The principle Analysis of the present invention is as follows：
The output end signal of sample circuit is denoted as VT；Threshold value comparison circuit internal reference one is denoted as VTH1, benchmark two is denoted as
VTH2。
When the crest voltage of signal VT is more than VTH1, control main power circuit work, contactor is attracted；When signal VT's
When valley point voltage is less than VTH2, control main power circuit is closed, contactor release.
The transmission function of sample circuit input and output is and the relevant function A (f) of frequency input signal.When input voltage is
When direct current, the gain for being input to output of the sample circuit is denoted as A (0).When input voltage is power frequency 50Hz signals, rectification
Voltage fundamental frequency afterwards is 100Hz, and the at this moment gain for being input to output of the sample circuit is denoted as A (100),
Formula after AC-input voltage rectification is：
Wherein UE is input voltage virtual value.VIN-AC (t) is carried out fourier progression expanding method, the harmonic wave of 200Hz or more
Component very little, can ignore the component of 200Hz or more, only retain the harmonic component and DC component of 100Hz, obtain
To formula be：
After over-sampling circuit, the voltage equation of signal VT is ac bus voltage after rectification：
When exchange input, the crest voltage of signal VT is：
When direct current inputs, the voltage of signal VT is：
VTDC=UE·A(0)
Beneficial effects of the present invention are：By the selection of sample circuit parameter, suitable A (0) and A (100) are set, allowed
VTDC=VTAC, so that it may so that in the case of the same alternating current-direct current of voltage effective value, the crest voltage of signal VT is the same so that touches
The electrical voltage point for sending out contactor action is the same, realizes that wide input voltage contactor is attracted and discharges in alternating current-direct current input voltage
Electrical voltage point is all than more consistent purpose, and circuit is easy to use, to can finally realize AC/DC contactor electricity-saving appliance product
It is general, reduce production and the warehousing pressure of manufacturer.
Meanwhile after increasing zener diode Z1, the voltage of signal VT can be limited, in high input voltage, input power down
Afterwards the voltage of signal VT drop to time of brownout threshold point can be shorter, it is possible to reduce the delay time of shutdown.
Description of the drawings
Fig. 1 is the circuit diagram of the present invention；
Fig. 2 is first embodiment of the invention schematic diagram；
Fig. 3 is the equivalent circuit of sample circuit in first embodiment of the invention；
Fig. 4 is waveforms of the signal VT in different input voltages in first embodiment of the invention；
Fig. 5 is second embodiment of the invention schematic diagram；
Fig. 6 is third embodiment of the invention schematic diagram；
Fig. 7 is fourth embodiment of the invention schematic diagram.
Specific implementation mode
Fig. 1 is the circuit diagram of the present invention, and present invention is contemplated that existing with rectifier bridge and main power electricity
On the basis of road constitutes contactor electricity saver circuit, it is further added by a rectification circuit, sample circuit and threshold value comparison circuit, threshold value
There are benchmark one and benchmark two inside comparison circuit, when the output end signal crest voltage of sample circuit is more than benchmark a period of time, control
The main power circuit work, contactor are attracted；When the output end signal threshold voltage of sample circuit is less than benchmark two, control master
Power circuit is closed, contactor release；It is required that input voltage be exchange when sample circuit output end signal crest voltage with it is defeated
The output end signal voltage for entering sample circuit when voltage is direct current is equal so that the electrical voltage point of triggering contactor action is the same, real
Existing wide input voltage contactor is attracted in alternating current-direct current input voltage and release voltage point is all than more consistent purpose, and
Circuit is easy to use, to finally realize the general of AC/DC contactor electricity-saving appliance product, reduces production and the library of manufacturer
Deposit pressure.
In order to make the present invention be more clearly understood, with reference to the accompanying drawings and embodiments, the present invention is described in more detail.
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
First embodiment
Fig. 2 is first embodiment of the present invention schematic diagram, and general contactor electricity-saving appliance includes rectifier bridge DB1 and main power electricity
Road is used for the electric current of control contactor coil.The present embodiment further includes rectifier bridge DB2, resistance R1, resistance R2, capacitance C1 and threshold
It is worth comparison circuit.It is connected with input voltage after the ac input end AC parallel connections of rectifier bridge DB1 and rectifier bridge DB2, rectifier bridge DB1's
Positive output end VBUS1 is connected with main power circuit, and the negative output terminal of rectifier bridge DB1 is connected to the ground.The positive output end of rectifier bridge DB2
VBUS2 is connected with one end of resistance R1, and the other end of resistance R1 is connected with one end of resistance R2, the connection of resistance R1 and resistance R2
Point is connected as output end with the threshold value comparison circuit, after the other end of resistance R2 is connected with the negative output terminal of rectifier bridge DB2
Ground connection, capacitance C1 are parallel to the both ends resistance R2, and threshold value comparison circuit is connected with main power circuit.
The present embodiment further comprises zener diode Z1, and zener diode Z1 is parallel to the both ends C1, wherein voltage stabilizing
The cathode of diode Z1 is connected with the tie point of resistance R1, resistance R2 and capacitance C1, the plus earth of zener diode Z1.
The voltage of the tie point of resistance R1 and resistance R2 is denoted as signal VT, have inside threshold value comparison circuit benchmark VTH1 and
VTH2.When the crest voltage of signal VT is more than VTH1, control main power circuit work, contactor is attracted；When the paddy of signal VT
When threshold voltage is less than VTH2, control main power circuit is closed, contactor release.
Illustratively of the invention operation principle below.The sample circuit being made of resistance R1, resistance R2 and capacitance C1 can
To be simplified by Thevenin's theorem, as shown in Fig. 3.Relationship after equivalent is as follows：
Wherein, VBUS2 is the busbar voltage after rectification.The transmission function for the bleeder circuit that RD and C1 are constituted is：
Wherein,F is the frequency of input signal.
When input voltage is direct current, the gain of sample circuit is：
AD(0)=1
When input voltage is industrial frequency AC,
When input is DC voltage, the voltage of signal VT is：
When input is alternating voltage, the voltage peak of signal VT is：
Pass through the value of suitable resistance R1, resistance R2 and capacitance C1, so that it may so that VTDC=VTAC, finally
So that when direct current input is with input is exchanged, the voltage of triggering is identical, achievees the effect that AC/DC universal.
Illustrate the actual effect of the present invention with one group of specific data below.If the actuation threshold value compared with VT is 1.2V,
Release threshold value is 0.8V, R1=3M Ω, R2=50k Ω, C1=0.22uF, the frequency f=100Hz of busbar voltage after rectification.Generation
Enter above-mentioned formula, direct current input can be obtained and exchange the trigger voltage point inputted, as shown in table 2.It can see from table,
All it is the requirement for meeting current new product under alternating current-direct current input condition.More intuitive effect is as shown in Fig. 4, is illustrated in figure
The voltage value of signal VT when different input voltages.
Table 2 is using the present invention, trigger point when alternating current-direct current inputs
| Exchange input | Direct current inputs | |
| Pick-up voltage | 74VAC | 73VDC |
| Release voltage | 60VAC | 49VDC |
If method not using the present invention samples directly from main power circuit busbar voltage VBUS2, actual effect is such as
Shown in table 3.Due to directly sampling the busbar voltage of main power, voltage magnitude and bus capacitor and the main power circuit of busbar voltage
Power consumption it is related, be a uncertain value, the actuation of alternating current-direct current differs too big with release voltage point.
Table 3 does not use the present invention, trigger point when alternating current-direct current inputs
| Exchange input | Direct current inputs | |
| Pick-up voltage | 51VAC | 73VDC |
| Release voltage | It is uncertain | 49VDC |
By above principle analysis it is recognised that the circuit of the present invention, can make actuation and the release electricity of alternating current-direct current
Pressure point is all than more consistent, and circuit is easy to use.
Second embodiment
Fig. 5 is second embodiment of the present invention schematic diagram, and second embodiment, which is different from the first embodiment, is a little sampling electricity
It is route inductance L1, resistance R3 and resistance R4 compositions, two endpoints formation after inductance L1, resistance R3 and resistance R4 are sequentially connected in series is adopted
The tie point of the input terminal of sample circuit, resistance R3 and resistance R4 are the output end of sample circuit.The present embodiment is equally further
Further include zener diode Z1, zener diode Z1 is parallel to the both ends resistance R4, the wherein cathode and resistance of zener diode Z1
R3, the tie point of resistance R4 are connected, the plus earth of zener diode Z1.
The basic principle of second embodiment is identical with the first embodiment, and is adopted by what inductance L1, resistance R3 and resistance R4 were constituted
Sample circuit, transmission function are：
When input voltage is direct current, the gain of sample circuit is：
When input voltage is industrial frequency AC, the gain of sample circuit is：
The value of suitable inductance L1, resistance R3 and resistance R4 are selected, effect same as embodiment one can be equally obtained.
3rd embodiment
Fig. 6 is third embodiment of the present invention schematic diagram, and 3rd embodiment is different from the first embodiment in rectification
Bridge DB2 is substituted by diode D1 and diode D2, two two poles that diode D1 and diode D2 and rectifier bridge DB1 are wherein grounded
Pipe forms a full-wave rectifying circuit.Connection relation is：The anode of diode D1 exchanges one end phase of input AC with rectifier bridge DB1
Even, the anode of diode D2 exchange with rectifier bridge DB1 input AC the other end it is connected.The cathode of diode D1, diode D2
Cathode is connected with one end of resistance R1, and the other end of resistance R1 is connected with one end of resistance R2, the connection of resistance R1 and resistance R2
Point is connected as output end with threshold value comparison circuit, and the other end of resistance R2 is grounded after being connected with the negative output terminal of rectifier bridge DB2,
Capacitance C1 is parallel to the both ends resistance R2, and threshold value comparison circuit is connected with main power circuit.The present embodiment further includes further steady
Diode Z1, zener diode Z1 is pressed to be parallel to the both ends C1, the wherein cathode of zener diode Z1 and resistance R1, resistance R2 and electricity
The tie point for holding C1 is connected, the plus earth of zener diode Z1.
Third is that the principle of embodiment is identical with the first embodiment substantially.In the third embodiment, diode D1, diode
Two diodes being grounded in D2 and rectifier bridge DB1, constitute the DB2 in first embodiment.Other parts circuit and first is in fact
It is identical to apply example.
Fourth embodiment
Fig. 7 is fourth embodiment of the present invention schematic diagram, and fourth embodiment is with second embodiment the difference is that rectification
Bridge DB2 is substituted by diode D1 and diode D2, two two poles that diode D1 and diode D2 and rectifier bridge DB1 are wherein grounded
Pipe forms a full-wave rectifying circuit.Connection relation is：The anode of diode D1 exchanges one end phase of input AC with rectifier bridge DB1
Even, the anode of diode D2 exchange with rectifier bridge DB1 input AC the other end it is connected, the cathode of diode D1, diode D2
Cathode is connected with one end of resistance R1,
The cathode connection of first diode and the second diode is grounded after inductance L1, resistance R3 and resistance R4 successively,
The tie point of resistance R3 and resistance R4 are the output end of sample circuit.The present embodiment further includes further zener diode Z1,
Zener diode Z1 is parallel to the both ends resistance R4, wherein the tie point phase of the cathode of zener diode Z1 and resistance R3, resistance R4
Even, the plus earth of zener diode Z1.
The principle of fourth embodiment is substantially identical as second embodiment.In the third embodiment, diode D1, diode D2
Two diodes with being grounded in rectifier bridge DB1, constitute the DB2 in second embodiment.Other parts circuit and first is implemented
Example is identical.
It the above is only the preferred embodiment of the present invention, it is noted that above-mentioned preferred embodiment is not construed as pair
The limitation of the present invention, protection scope of the present invention should be subject to claim limited range.For the art
For those of ordinary skill, without departing from the spirit and scope of the present invention, several improvements and modifications can also be made, these change
Protection scope of the present invention is also should be regarded as into retouching.
Claims (12)
1. a kind of contactor electricity-saving appliance detection circuit, contactor electricity-saving appliance includes the first rectifier bridge and main power circuit, for controlling
The electric current of contactor coil processed；It is characterized in that：Further include the second rectifier bridge, sample circuit and threshold value comparison circuit；First is whole
It is connected with input voltage after the ac input end parallel connection of stream bridge and the second rectifier bridge, the positive output end of the first rectifier bridge and main power
Circuit is connected, and the positive output end of the second rectifier bridge is connected with the input terminal of sample circuit, the negative output terminal of the first rectifier bridge and the
Altogether, the output end of sample circuit is connected the negative output terminal of two rectifier bridges with the input terminal of threshold value comparison circuit, threshold value comparison electricity
The output end on road is connected with main power circuit；There are benchmark one and benchmark two inside threshold value comparison circuit, when the output of sample circuit
End signal crest voltage is more than benchmark for the moment, and threshold value comparison circuit output controls signal control main power circuit work, contactor
It is attracted；When the output end signal valley point voltage of sample circuit is less than benchmark two, threshold value comparison circuit output controls signal control
Main power circuit is closed, contactor release；The output end signal crest voltage of sample circuit and input when input voltage is exchange
The output end signal voltage of sample circuit is equal when voltage is direct current.
2. contactor electricity-saving appliance detection circuit according to claim 1, it is characterised in that：Further include two pole of voltage stabilizing
Pipe, the cathode of zener diode connect the output end of sample circuit, the plus earth of zener diode.
3. contactor electricity-saving appliance detection circuit according to claim 1, it is characterised in that：Sample circuit is by resistance R1, electricity
Two endpoints after resistance R2 and capacitance C1 compositions, resistance R1 and resistance R2 series connection form the input terminal of sample circuit, capacitance C1 mono-
End be connected with the tie point of resistance R1 and resistance R2, the capacitance C1 other ends be grounded, capacitance C1, resistance R1 and resistance R2 tie point
For the output end of sample circuit.
4. contactor electricity-saving appliance detection circuit according to claim 3, it is characterised in that：Sample circuit further includes voltage stabilizing two
Pole pipe Z1, zener diode Z1 are parallel to the both ends C1, the wherein cathode of zener diode Z1 and resistance R1, resistance R2 and capacitance C1
Tie point be connected, the plus earth of zener diode Z1.
5. contactor electricity-saving appliance detection circuit according to claim 1, it is characterised in that：Sample circuit by by inductance L1,
Resistance R3 and resistance R4 compositions, two endpoints after inductance L1, resistance R3 and resistance R4 are sequentially connected in series form the defeated of sample circuit
Enter to hold, the tie point of resistance R3 and resistance R4 are the output end of sample circuit.
6. contactor electricity-saving appliance detection circuit according to claim 5, it is characterised in that：Sample circuit further includes voltage stabilizing two
Pole pipe Z1, zener diode Z1 are parallel to the both ends resistance R4, the wherein company of the cathode of zener diode Z1 and resistance R3, resistance R4
Contact is connected, the plus earth of zener diode Z1.
7. a kind of contactor electricity-saving appliance detection circuit, contactor electricity-saving appliance includes the first rectifier bridge and main power circuit, for controlling
The electric current of contactor coil processed；It is characterized in that：Further include the first diode, the second diode, sample circuit and threshold value comparison
Circuit；The input terminal of first rectifier bridge is separately connected the anode of the first diode and the second diode, the first rectifier bridge it is just defeated
Outlet is connected with main power circuit, the negative output terminal ground connection of the first rectifier bridge, the cathode phase of the first diode and the second diode
The output end of input end grounding through sample circuit after connection, sample circuit is connected with the input terminal of threshold value comparison circuit, threshold value
The output end of comparison circuit is connected with main power circuit；There are benchmark one and benchmark two inside threshold value comparison circuit, works as sample circuit
Output end signal crest voltage be more than benchmark for the moment, threshold value comparison circuit output control signal control main power circuit work,
Contactor is attracted；When the output end signal valley point voltage of sample circuit is less than benchmark two, threshold value comparison circuit output control letter
Number control main power circuit close, contactor release；The output end signal crest voltage of sample circuit when input voltage is exchange
With input voltage be direct current when the output end signal voltage of sample circuit it is equal.
8. contactor electricity-saving appliance detection circuit according to claim 7, it is characterised in that：Further include two pole of voltage stabilizing
Pipe, the cathode of zener diode connect the output end of sample circuit, the plus earth of zener diode.
9. contactor electricity-saving appliance detection circuit according to claim 7, it is characterised in that：Sample circuit by by resistance R1,
Resistance R2 and capacitance C1 compositions, resistance R1 and resistance R2 series connection, resistance R1 connect the one or two pole with one end after resistance R2 series connection
Other end ground connection after the cathode connection of pipe and the second diode, resistance R1 and resistance R2 series connection, the one end capacitance C1 and resistance
R1 is connected with the tie point of resistance R2, capacitance C1 other ends ground connection, and the tie point of capacitance C1, resistance R1 and resistance R2 are sampling electricity
The output end on road.
10. contactor electricity-saving appliance detection circuit according to claim 9, it is characterised in that：Sample circuit further includes voltage stabilizing
Diode Z1, zener diode Z1 are parallel to the both ends C1, the wherein cathode of zener diode Z1 and resistance R1, resistance R2 and capacitance
The tie point of C1 is connected, the plus earth of zener diode Z1.
11. contactor electricity-saving appliance detection circuit according to claim 7, it is characterised in that：Sample circuit is by inductance L1, electricity
It hinders R3 and resistance R4 is formed, the cathode connection of the first diode and the second diode is successively through inductance L1, resistance R3 and resistance
It is grounded after R4, the tie point of resistance R3 and resistance R4 are the output end of sample circuit.
12. contactor electricity-saving appliance detection circuit according to claim 11, it is characterised in that：Sample circuit further includes voltage stabilizing
Diode Z1, zener diode Z1 are parallel to the both ends resistance R4, wherein the cathode of zener diode Z1 and resistance R3, resistance R4
Tie point is connected, the plus earth of zener diode Z1.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810139788.2A CN108387810B (en) | 2018-02-11 | 2018-02-11 | Contactor electricity-saving appliance detection circuit |
| PCT/CN2018/116948 WO2019153834A1 (en) | 2018-02-11 | 2018-11-22 | Contactor energy saving test circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810139788.2A CN108387810B (en) | 2018-02-11 | 2018-02-11 | Contactor electricity-saving appliance detection circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108387810A true CN108387810A (en) | 2018-08-10 |
| CN108387810B CN108387810B (en) | 2024-02-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810139788.2A Active CN108387810B (en) | 2018-02-11 | 2018-02-11 | Contactor electricity-saving appliance detection circuit |
Country Status (2)
| Country | Link |
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| CN (1) | CN108387810B (en) |
| WO (1) | WO2019153834A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108828296A (en) * | 2018-08-17 | 2018-11-16 | 深圳南云微电子有限公司 | A kind of detection circuit and the contactor electricity-saving appliance comprising the detection circuit |
| WO2019153834A1 (en) * | 2018-02-11 | 2019-08-15 | 广州金升阳科技有限公司 | Contactor energy saving test circuit |
| CN111239460A (en) * | 2018-11-28 | 2020-06-05 | 广东威灵汽车部件有限公司 | Sampling circuit and electrical equipment |
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Also Published As
| Publication number | Publication date |
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| CN108387810B (en) | 2024-02-20 |
| WO2019153834A1 (en) | 2019-08-15 |
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