CN104426136B - A kind of phase shortage control device of threephase motor - Google Patents
A kind of phase shortage control device of threephase motor Download PDFInfo
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- CN104426136B CN104426136B CN201310373067.5A CN201310373067A CN104426136B CN 104426136 B CN104426136 B CN 104426136B CN 201310373067 A CN201310373067 A CN 201310373067A CN 104426136 B CN104426136 B CN 104426136B
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Abstract
The invention discloses a kind of phase shortage control devices of threephase motor, including adjustment circuit, decision circuitry, bridge rectifier, switching circuit, control circuit.The input terminal of the adjustment circuit is connect with three phase mains；The output end of the adjustment circuit is connected with the input terminal of the decision circuitry；The output end of the decision circuitry connects second end and the third end of the control circuit；The output end of the bridge rectifier connects first end and the third end of the control circuit；The three phase mains is connect after the switching circuit with the input terminal of the bridge rectifier；Wherein, the control circuit is used to control the conducting and cut-off of the bridge rectifier.Using the present invention, when invention device detects three-phase motor open-phase, threephase motor can be made to be stopped by relay, to prevent burning for motor, extend the service life of motor.
Description
Technical field
The present invention relates to electronic field more particularly to a kind of phase shortage control devices of threephase motor.
Background technology
Currently, threephase motor is widely used in numerous areas.Reality in use, in the three-phase circuit of threephase motor,
Sometimes one-phase circuit cisco unity malfunction, as phase shortage are had.In the case of phase shortage, if threephase motor still works,
Its running speed can be low compared with permanent speed, causes electronic current big, be easy to cause burning for motor.
Invention content
Technical problem to be solved by the present invention lies in provide a kind of phase shortage control device of threephase motor.It can be to three
The phase shortage of phase motor is controlled, it is made to be stopped under non-full-phase state.
In order to solve the above-mentioned technical problem, the embodiment provides a kind of devices, including adjustment circuit, judgement electricity
The input terminal of road, bridge rectifier, switching circuit, control circuit, the adjustment circuit is connect with three phase mains；The adjustment
The output end of circuit is connected with the input terminal of the decision circuitry；The output end of the decision circuitry connects the control circuit
Second end and third end；The output end of the bridge rectifier connects first end and the third end of the control circuit；It is described
Three phase mains is connect after the switching circuit with the input terminal of the bridge rectifier；Wherein, the control circuit is used
In the conducting and cut-off that control the bridge rectifier.
In some feasible embodiments, the adjustment circuit includes transformer T, diode D1, capacitance C1, the change
The input terminal of depressor T connects L2, L3 of the three phase mains；The circuit that the diode D1 is formed after connecting with the capacitance C1
It is connected to two output ends of the transformer T；The capacitance C1 does not connect the control electricity with described concatenated one end resistance R1
The third end on road.
In some feasible embodiments, the decision circuitry includes resistance R1, voltage-stabiliser tube ZD, capacitance C2, the electricity
The public connecting end for being electrically connected to the diode D1 and the capacitance C1 that resistance R1 is formed after connecting with the voltage-stabiliser tube ZD
Between the second end of the control circuit；The capacitance C2 is connected to the commonly connected of the resistance R1 and voltage-stabiliser tube ZD
Between end and the third end of the control circuit.
In some feasible embodiments, the bridge rectifier includes 4 rectifier diodes, the bridge rectifier
1st pin of circuit connects the L2 of the three phase mains；2nd pin of the bridge rectifier connects the control circuit
First end；4th pin of the bridge rectifier connects the third end of the control circuit.
In some feasible embodiments, the control circuit includes relay KM, relay switch KA, motor M, opens
SB is closed, the relay switch KA includes 4 switches；The electricity that KA4 in the relay switch KA is formed after connecting with relay KM
Road is connected between the L1 of the three phase mains and the 3rd pin of the bridge rectifier；The switch SB is connected to described
Between 3rd pin of the public connecting end and the bridge rectifier of KA4 and the relay KM；In the relay switch KA
KA1 be connected between 1 port and the L1 of the three phase mains of the motor M；KA2 in the relay switch KA connects
It is connected between 2 ports and the L2 of the three phase mains of the motor M；KA3 in the relay switch KA is connected to institute
It states between 3 ports of motor M and the L3 of the three phase mains.
In some feasible embodiments, the control circuit is thyristor, and the first end of the control circuit is institute
State the anode of thyristor；The second end of the control circuit is the control pole of the thyristor；The third end of the control circuit
For the cathode of the thyristor.
In some feasible embodiments, the capacitance of the capacitance C1 is 7-10 μ F.
In some feasible embodiments, the resistance value of the resistance R1 is 1-10K Ω.
In some feasible embodiments, the capacitance of the capacitance C2 is 0.1-10 μ F.
In some feasible embodiments, the control circuit is triode, and the first end of the control circuit is institute
State the collector of triode；The second end of the control circuit is the base stage of the triode；The third end of the control circuit
For the emitter of the triode.
The embodiment of the present invention has the following advantages that or advantageous effect：
Using the present invention, when invention device detects three-phase motor open-phase, threephase motor can be made by relay
It is stopped, to prevent burning for motor, extends the service life of motor.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without having to pay creative labor, may be used also for those of ordinary skill in the art
With obtain other attached drawings according to these attached drawings.
Fig. 1 is the modular structure schematic diagram of an embodiment of the phase shortage control device of the threephase motor of the present invention；
Fig. 2 is the electrical block diagram of an embodiment of the phase shortage control device of the threephase motor of the present invention.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Below with reference to the accompanying drawings the embodiment of the present invention is described.Referring to Fig. 1, the present invention includes adjustment circuit 1, judges
Circuit 2, control circuit 3, bridge rectifier 4, switching circuit 5, wherein：
The input terminal of the adjustment circuit 1 is connect with three phase mains；The output end of the adjustment circuit 1 and judgement electricity
The input terminal on road 2 is connected；The output end of the decision circuitry 2 connects second end and the third end of the control circuit 3；The bridge
The output end of formula rectification circuit 4 connects first end and the third end of the control circuit 3；The three phase mains passes through the switch
It is connect with the input terminal of the bridge rectifier 4 after circuit 5；Wherein, the control circuit 3 is for controlling the bridge rectifier
The conducting and cut-off of circuit 4.
Three phase mains after circuit 1 by adjusting DC voltage is become, if the voltage stabilizing in decision circuitry 2 can be connected in DC voltage
Pipe, then the conducting of control circuit 3, since control circuit 3 connects the output end of bridge rectifier 4, then bridge rectifier 4 is led
Logical, then the relay in switching circuit 5 powers on, and relay switch is closed, threephase motor work；If DC voltage cannot be connected
Voltage-stabiliser tube in decision circuitry 2, then control circuit 3 be turned off with bridge rectifier 4, the relay in switching circuit 5 is without logical
Road electricity, then threephase motor cannot work.
With further reference to Fig. 2, the circuit structure of an embodiment of the phase shortage control device of threephase motor of the invention shows
Intention may include adjustment circuit 1, decision circuitry 2, control circuit 3, bridge rectifier 4, switching circuit 5, the adjustment circuit 1
Input terminal including transformer T, diode D1, capacitance C1, the transformer T connects L2, L3 of the three phase mains；Described two
What pole pipe D1 was formed after connecting with the capacitance C1 is electrically connected to two output ends of the transformer T；The capacitance C1 not with
Described concatenated one end resistance R1 connects the third end of the control circuit 3.
The decision circuitry 2 includes resistance R1, voltage-stabiliser tube ZD, capacitance C2, and the resistance R1 connects with the voltage-stabiliser tube ZD
What is formed afterwards is electrically connected to the second end of the public connecting end and the control circuit 3 of the diode D1 and the capacitance C1
Between；The capacitance C2 is connected to the of the public connecting end of the resistance R1 and voltage-stabiliser tube ZD and the control circuit 3
Between three ends.
The bridge rectifier 4 include 4 rectifier diodes, the bridge rectifier 4 the 1st pin connection described in
The L2 of three phase mains；2nd pin of the bridge rectifier 4 connects the first end of the control circuit 3；The bridge rectifier
4th pin of circuit 4 connects the third end of the control circuit 3.
The switching circuit 5 includes relay KM, relay switch KA, motor M, switch SB, the relay switch KA packets
It is switched containing 4；What the KA4 in the relay switch KA was formed after connecting with relay KM is electrically connected to the three phase mains
Between L1 and the 3rd pin of the bridge rectifier 4；The switch SB is connected to the public affairs of the KA4 and the relay KM
Altogether between connecting pin and the 3rd pin of the bridge rectifier 4；KA1 in the relay switch KA is connected to described electronic
Between 1 port and the L1 of the three phase mains of machine M；KA2 in the relay switch KA is connected to the 2 of the motor M
Between port and the L2 of the three phase mains；KA3 in the relay switch KA be connected to 3 ports of the motor M with
Between the L3 of the three phase mains.
The control circuit 3 is thyristor Q1, and the first end of the control circuit 3 is the anode of the thyristor Q1；Institute
The second end for stating control circuit 3 is the control pole of the thyristor Q1；The third end of the control circuit 3 is the thyristor Q1
Cathode.
The operation principle of the circuit of the embodiment of the present invention is simply introduced with reference to Fig. 2.
When L1, L2, L3 motor three-phase electricity are normal, L2, L3 phase voltage are made by transformer pressure-reducing, rectification, filtering, voltage
Obtain voltage-stabiliser tube ZD conductings, thyristor Q1 conductings.When by lower switch SB, rectifier bridge work, since Q1 is in the conduction state, relay
KM work once electrifieds, relay switch KA are attracted, electric motor normal working.SB switches are automatic to be disconnected.
After motor M devotes oneself to work, if there is phase of breaking in motor M, because leading-out terminal, there are back-emf, numerical value is general
Less than rated voltage, it is about 320V that transformer, which goes out extreme voltage, at this point, rectification filtering power cannot be such that voltage-stabiliser tube ZD leads after decompression
It is logical, thyristor Q1 also with regard to voltage out of hand and by.Thyristor Q1 is by rear, KM dead electricity release, relay switch KA disconnections, electricity
Motivation is stopped.When alternating current presses touch-switch SB motor just task again after restoring normal.
The embodiment of the present invention has the following advantages that or advantageous effect：
Using the present invention, when invention device detects three-phase motor open-phase, threephase motor can be made by relay
It is stopped, to prevent burning for motor, extends the service life of motor.
The apparatus embodiments described above are merely exemplary, wherein the unit illustrated as separating component can
It is physically separated with being or may not be, the component shown as unit may or may not be physics list
Member, you can be located at a place, or may be distributed over multiple network units.It can be selected according to the actual needs
In some or all of module achieve the purpose of the solution of this embodiment.Those of ordinary skill in the art are not paying creativeness
Labour in the case of, you can to understand and implement.
Embodiments described above does not constitute the restriction to the technical solution protection domain.It is any in above-mentioned implementation
Modifications, equivalent substitutions and improvements etc., should be included in the protection model of the technical solution made by within the spirit and principle of mode
Within enclosing.
Claims (8)
1. a kind of phase shortage control device of threephase motor, which is characterized in that including adjustment circuit, decision circuitry, bridge rectifier
Circuit, switching circuit, control circuit；
The input terminal of the adjustment circuit is connect with three phase mains；The output end of the adjustment circuit is defeated with the decision circuitry
Enter end to be connected；The output end of the decision circuitry connects second end and the third end of the control circuit；The bridge rectifier electricity
The output end on road connects first end and the third end of the control circuit；The three phase mains after the switching circuit with institute
State the input terminal connection of bridge rectifier；The control circuit is used to control the conducting and cut-off of the bridge rectifier；
The adjustment circuit includes transformer T, diode D1, capacitance C1；
The decision circuitry includes resistance R1, voltage-stabiliser tube ZD, capacitance C2；
The input terminal of the transformer T connects L2, L3 of the three phase mains；After the diode D1 connects with the capacitance C1
Two output ends for being electrically connected to the transformer T formed；The capacitance C1 is not connect with described concatenated one end resistance R1
The third end of the control circuit；
What the resistance R1 was formed after connecting with the voltage-stabiliser tube ZD is electrically connected to the diode D1's and capacitance C1
Between public connecting end and the second end of the control circuit；The capacitance C2 is connected to the resistance R1 and the voltage-stabiliser tube ZD
Public connecting end and the third end of the control circuit between.
2. device as described in claim 1, which is characterized in that the capacitance of the capacitance C1 is 7-10 μ F.
3. device as described in claim 1, which is characterized in that the resistance value of the resistance R1 is 1-10K Ω.
4. device as described in claim 1, which is characterized in that the capacitance of the capacitance C2 is 0.1-10 μ F.
5. device as described in claim 1, which is characterized in that the bridge rectifier includes 4 rectifier diodes；
1st pin of the bridge rectifier connects the L2 of the three phase mains；2nd pin of the bridge rectifier connects
Connect the first end of the control circuit；4th pin of the bridge rectifier connects the third end of the control circuit.
6. device as claimed in claim 5, which is characterized in that the switching circuit includes relay KM, relay switch KA, electronic
Machine M, switch SB；
The relay switch KA includes 4 switches；The circuit that KA4 in the relay switch KA is formed after connecting with relay KM
It is connected between the L1 of the three phase mains and the 3rd pin of the bridge rectifier；The switch SB is connected to the KA4
Between the public connecting end and the 3rd pin of the bridge rectifier of the relay KM；In the relay switch KA
KA1 is connected between 1 port and the L1 of the three phase mains of the motor M；KA2 connections in the relay switch KA
Between 2 ports and the L2 of the three phase mains of the motor M；KA3 in the relay switch KA is connected to described
Between 3 ports and the L3 of the three phase mains of motor M.
7. device as described in claim 1, which is characterized in that the control circuit is thyristor；
The first end of the control circuit is the anode of the thyristor；The second end of the control circuit is the thyristor
Control pole；The third end of the control circuit is the cathode of the thyristor.
8. device as described in claim 1, which is characterized in that the control circuit is triode；
The first end of the control circuit is the collector of the triode；The second end of the control circuit is the triode
Base stage；The third end of the control circuit is the emitter of the triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310373067.5A CN104426136B (en) | 2013-08-23 | 2013-08-23 | A kind of phase shortage control device of threephase motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310373067.5A CN104426136B (en) | 2013-08-23 | 2013-08-23 | A kind of phase shortage control device of threephase motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104426136A CN104426136A (en) | 2015-03-18 |
| CN104426136B true CN104426136B (en) | 2018-10-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310373067.5A Active CN104426136B (en) | 2013-08-23 | 2013-08-23 | A kind of phase shortage control device of threephase motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104426136B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87210888U (en) * | 1987-06-25 | 1988-05-11 | 广东省仁化县仁化镇农工商联合公司 | 3-phase motor phase-absent automatic preventer |
| CN2132324Y (en) * | 1992-09-05 | 1993-05-05 | 杨中模 | Phase-failure protector for electric machine |
| CN201838980U (en) * | 2009-11-25 | 2011-05-18 | 云南建工第五建设有限公司 | Open phase leakage switch |
| CN202435010U (en) * | 2011-12-09 | 2012-09-12 | 湖南文理学院 | Open phase protector of motor unit |
-
2013
- 2013-08-23 CN CN201310373067.5A patent/CN104426136B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87210888U (en) * | 1987-06-25 | 1988-05-11 | 广东省仁化县仁化镇农工商联合公司 | 3-phase motor phase-absent automatic preventer |
| CN2132324Y (en) * | 1992-09-05 | 1993-05-05 | 杨中模 | Phase-failure protector for electric machine |
| CN201838980U (en) * | 2009-11-25 | 2011-05-18 | 云南建工第五建设有限公司 | Open phase leakage switch |
| CN202435010U (en) * | 2011-12-09 | 2012-09-12 | 湖南文理学院 | Open phase protector of motor unit |
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| Publication number | Publication date |
|---|---|
| CN104426136A (en) | 2015-03-18 |
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