CN207184037U - Phase failure protector of electric motor - Google Patents
Phase failure protector of electric motor Download PDFInfo
- Publication number
- CN207184037U CN207184037U CN201721082499.0U CN201721082499U CN207184037U CN 207184037 U CN207184037 U CN 207184037U CN 201721082499 U CN201721082499 U CN 201721082499U CN 207184037 U CN207184037 U CN 207184037U
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- Prior art keywords
- diode
- phase
- electric capacity
- lead
- negative pole
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- 230000001012 protector Effects 0.000 title claims abstract description 15
- 239000003990 capacitor Substances 0.000 claims abstract description 7
- 230000005611 electricity Effects 0.000 claims description 12
- 230000007935 neutral effect Effects 0.000 claims description 6
- 239000004020 conductor Substances 0.000 claims description 3
- 230000006978 adaptation Effects 0.000 abstract description 2
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 238000009434 installation Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 230000000087 stabilizing effect Effects 0.000 description 2
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Control Of Ac Motors In General (AREA)
- Protection Of Generators And Motors (AREA)
Abstract
A kind of phase failure protector of electric motor is the utility model is related to, is made up of capacitor sample reduction voltage circuit, diode rectifier circuit, relay and A.C. contactor.Utility model works are reliable, long lifespan, low in energy consumption, the various harsh environments of adaptation；Phase failure protector circuit is simple, is easy to make；Cheap, installation easy-to-connect；It will not be negatively affected to motor, thoroughly solve the problems, such as that motor damages caused by disconnected phase.
Description
Technical field
A kind of phase failure protector of electric motor is the utility model is related to, when Electric Motor Open-phase Situation motor can be made to stop automatically
Machine, belong to electric power application field.
Background technology
Motor is commonly called as motor, and motor can be widely applied to electric power, lathe, blower fan, water pump, compressor and traffic fortune
All kinds of mechanical transmissions such as defeated, agriculture, food processing, and act on increasing.But due to the power network quality of power supply exist it is humorous
The reason such as ripple, voltage pulsation, overheat, overload, disconnected phase, under-voltage, motor burnout failure, occurs often, except being brought to user
Certain economic loss, it can also influence normal work.
In disconnected phase, motor may invert motor, spin down, or when it is slow when block, most of is because phase shortage produces
Overexcitation, so as to cause electric motor overheating, burn motor.
Utility model content
The utility model is directed to above-mentioned problems of the prior art, there is provided a kind of phase failure protector of electric motor, solves
Electric Motor Open-phase Situation flimsy problem in the prior art.
The technical solution of the utility model is as follows：
Phase failure protector of electric motor, electric capacity C3, electric capacity C2, electric capacity C1 one end respectively with A phase lines in three-phase electricity, B phase lines,
C phase lines are connected, positive pole with diode VD2 of electric capacity C3, electric capacity C2, the electric capacity C1 other end, diode VD1 negative pole phase
Even, the negative pole of the diode VD2 and diode VD4 negative pole, electrochemical capacitor C4 positive pole, voltage-regulator diode VD5 negative pole
It is connected, the positive pole of the diode VD4 is connected with diode VD3 negative pole, the neutral lead of three-phase electricity, the diode
VD3 positive pole and the positive pole of the diode VD1, the negative pole of the electrochemical capacitor C4, the positive pole phase of the voltage-regulator diode VD5
Even；
Relay K coil one end is connected with the negative pole of the voltage-regulator diode VD5, and the coil of the relay K is another
End is connected with the positive pole of the voltage-regulator diode VD5, a pin and the A.C. contactor KM of the normally opened contact of the relay K
One end of coil connects, and another pin of the normally opened contact of the relay K connects with neutral conductor N, the A.C. contactor
The other end of KM coils is connected with any one phase in three-phase electricity.
The utility model has the advantages of as follows：
1st, reliable operation, long lifespan, low in energy consumption, the various harsh environments of adaptation；
2nd, circuit is simple, is easy to make；
3rd, cheap, installation easy-to-connect；
4th, protectiveness is reliable, will not be negatively affected to motor.
Brief description of the drawings
Fig. 1 is the circuit theory diagrams of the utility model phase failure protector of electric motor.
Fig. 2 is the utility model phase failure protector of electric motor mode of connection schematic diagram.
Fig. 3 is the circuit diagram of hand push button in Fig. 2.
Embodiment
Embodiment
As shown in figure 1, electric capacity C3, electric capacity C2, electric capacity C1 one end respectively with A phase lines, B phase lines, C phase line phases in three-phase electricity
Even, positive pole, the diode VD1 negative pole of electric capacity C3, electric capacity C2, the electric capacity C1 other end with diode VD2 are connected, and described two
Pole pipe VD2 negative pole is connected with diode VD4 negative pole, electrochemical capacitor C4 positive pole, voltage-regulator diode VD5 negative pole, described
Diode VD4 positive pole is connected with diode VD3 negative pole, the neutral lead N of three-phase electricity, and the diode VD3 is just
Pole is connected with the positive pole of the diode VD1, the negative pole of the electrochemical capacitor C4, the voltage-regulator diode VD5 positive pole.The portion
The main function divided is after by the electric capacity C1, electric capacity C2, electric capacity C3, phase voltage is depressured, by by two pole
After pipe VD1, diode VD2, diode VD3, the rectification circuit of diode VD4 compositions carry out rectification processing, by the electrolysis
After electric capacity C4 filtering, voltage stabilizing is carried out by voltage-regulator diode VD5, if three-phase voltage is normal, voltage-regulator diode voltage stabilizing VD5 outputs
For DC12V, can driven rear stage relay K；If occurring open phase fault in three-phase voltage, voltage-regulator diode VD5 is defeated
Go out voltage and be less than DC12V, will so lead to not the relay K of driving rear stage.
Relay K coil one end is connected with the negative pole of the voltage-regulator diode VD5, and the coil of the relay K is another
End is connected with the positive pole of the voltage-regulator diode VD5, a pin and the A.C. contactor KM of the normally opened contact of the relay K
One end of coil connects, and another pin of the normally opened contact of the relay K connects with neutral conductor N, the A.C. contactor
The other end of KM coils is connected with any one phase in three-phase electricity.The main function of the part is when the relay K is normal
During driving, then its normally opened contact will close, so that the A.C. contactor KM is acted, the electricity controlled by A.C. contactor
The three-phase electricity of machine will be connected, and motor can normal work.If on the contrary, when the relay K can not be driven normally, then its is normal
Opening contact will disconnect, then the A.C. contactor KM can also disconnect, and cause the three-phase of motor electrically disconnected, leave the motor off work
Make.
Motor open-phase protection wiring is simple, outer three lines drawn of device need to be only serially connected in three-phase electricity, not had
Polarized relation, protector outer lead and N lines connection must it is firm, guard against wiring loosely electric motor operation when shake it is de-, protection
It is ineffective.
The phase failure protector of electric motor mode of connection as shown in Fig. 2 there are 5 lead-out wires the lower section of phase failure protector of electric motor 1,
Wherein three lead-out wires meet motor M, and the 4th article of lead-out wire is connected with stop button 2, the 5th article of lead-out wire and the phase of start button 3
Even, three lead-out wires are drawn above phase failure protector of electric motor, wherein a lead-out wire is connected with fuse FU black lines.When certain
Planting reason to cause in three-phase voltage power supply after the disconnected phase of any phase, the electric current that will mutually lose the job so that relay K discharges, its
Normally open contact disconnects, and A.C. contactor KM power-off releases, electric motor operation dump is shut down, so as to protect motor will not
Damaged caused by phase shortage.
Each component model of the utility model is as follows：
Electric capacity C1, electric capacity C2, electric capacity C3, specification are 0.82 μ F/400V；
Diode VD1, diode VD2, diode VD3, diode VD4, specification 1N4004；
VD5 is voltage-regulator diode, specification 12V；
C4 is electrolytic condenser, and specification is 470 μ F/50V；
K is relay, specification Bestar/BS-102,12VDC；
KM is A.C. contactor.
Claims (2)
1. phase failure protector of electric motor, it is characterised in that electric capacity C3, electric capacity C2, electric capacity C1 one end respectively with A phases in three-phase electricity
Line, B phase lines, C phase lines are connected, positive pole, the diode VD1 of electric capacity C3, electric capacity C2, the electric capacity C1 other end with diode VD2
Negative pole be connected, the negative pole of the diode VD2 and diode VD4 negative pole, electrochemical capacitor C4 positive pole, voltage-regulator diode
VD5 negative pole is connected, and the positive pole of the diode VD4 is connected with diode VD3 negative pole, the neutral lead of three-phase electricity,
The positive pole of the diode VD3 and the positive pole of the diode VD1, the negative pole of the electrochemical capacitor C4, the voltage-regulator diode
VD5 positive pole is connected；
Relay K coil one end is connected with the negative pole of the voltage-regulator diode VD5, the coil other end of the relay K with
The positive pole of the voltage-regulator diode VD5 is connected, a pin and the A.C. contactor KM coils of the normally opened contact of the relay K
One end connect, another pin of the normally opened contact of the relay K connects with neutral conductor N, the A.C. contactor KM lines
The other end of circle is connected with any one phase in three-phase electricity.
2. phase failure protector of electric motor according to claim 1, it is characterised in that there are 5 lead-out wires below body, its
In three lead-out wires meet motor M, the 4th article of lead-out wire is connected with stop button, and the 5th article of lead-out wire is connected with start button, this
Three lead-out wires are drawn above body, wherein a lead-out wire is connected with fuse FU black lines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721082499.0U CN207184037U (en) | 2017-08-28 | 2017-08-28 | Phase failure protector of electric motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721082499.0U CN207184037U (en) | 2017-08-28 | 2017-08-28 | Phase failure protector of electric motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207184037U true CN207184037U (en) | 2018-04-03 |
Family
ID=61739282
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721082499.0U Active CN207184037U (en) | 2017-08-28 | 2017-08-28 | Phase failure protector of electric motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207184037U (en) |
-
2017
- 2017-08-28 CN CN201721082499.0U patent/CN207184037U/en active Active
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