CN207518260U - It is a kind of simple check three phase electric machine whether phase shortage circuit - Google Patents
It is a kind of simple check three phase electric machine whether phase shortage circuit Download PDFInfo
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- CN207518260U CN207518260U CN201721750416.0U CN201721750416U CN207518260U CN 207518260 U CN207518260 U CN 207518260U CN 201721750416 U CN201721750416 U CN 201721750416U CN 207518260 U CN207518260 U CN 207518260U
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- electric machine
- decision circuitry
- motor
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Abstract
The utility model discloses it is a kind of simple check three phase electric machine whether phase shortage circuit; including detection circuit, decision circuitry, amplifying circuit and protection circuit; three phase mains is terminated before the detection circuit; decision circuitry is terminated after the detection circuit; amplifying circuit is connect behind the decision circuitry; protection circuit is connect behind the amplifying circuit, motor is connect behind the protection circuit.The decision circuitry receives detection circuit signal; the protection circuit receives the judgement signal and controls closing motor action; play the role of protecting motor; the three-phase circuit of motor is judged by using decision circuitry; and whether there is current signal to control motor action according to decision circuitry, it is achieved thereby that the purpose of high efficient detection three phase electric machine current phase, and motor is protected using inductance original paper; so as to reduce cost, and high sensitivity.
Description
Technical field
The utility model is related to electrical apparatus control equipment field, whether phase shortage is electric for specifically a kind of simple inspection three phase electric machine
Road.
Background technology
With being widely used for cleaning electric energy, motor is wide as a kind of important machinery for converting electrical energy into mechanical energy
General use, but often there is the failure of phase shortage in routine use in motor, it is existing to check circuit mainly using complicated intelligence
Inspection system, cost is higher, and maintenance difficult is not used widely, so the spoilage of motor is very high.
Utility model content
The purpose of this utility model is to provide it is a kind of simple check three phase electric machine whether phase shortage circuit, have efficient
Rate, circuit are simple, it is easy to maintenance, inexpensive and highly sensitive the advantages of, to solve the problems of the prior art.
To achieve the above object, the utility model provides following technical solution：Whether a kind of simple inspection three phase electric machine
Phase shortage circuit, including detection circuit, decision circuitry, amplifying circuit and protection circuit, which is characterized in that the detection circuit front end
Three phase mains is connect, decision circuitry is terminated after the detection circuit, amplifying circuit, the amplifying circuit are connect behind the decision circuitry
Protection circuit is connect below, and motor is connect behind the protection circuit.
Preferably, the detection circuit element includes R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12.
Preferably, the decision circuitry element include R13, R14, R15, C1, C2, C3, C4, TC783 chip, D1, D2,
D3、R16、R17、VA1、VA2、VA3、VA4、VA5。
Preferably, the amplifying circuit includes N1, N2.
Preferably, the protection circuit includes D4, L1.
Preferably, 1,2,3,14 feet of the TC783 chips meet VCC, and 7 feet meet GND.
Compared with prior art, the beneficial effects of the utility model are：The utility model is provided with inspection at three phase mains
Slowdown monitoring circuit, for detecting the whether normal input circuit system of three phase mains；The utility model judges three using light emitting diode
Whether phase power supply is practical normal；The utility model adds the protection circuit of inductance coil and diode as motor, works as electric current
When excessive, breakdown diode, inductance coil powers off after flowing through instantaneous weak current, can effectively protect motor.
Description of the drawings
Fig. 1 for the utility model it is a kind of it is simple inspection three phase electric machine whether the circuit connection diagram of phase shortage circuit.
Fig. 2 for the utility model it is a kind of it is simple inspection three phase electric machine whether the operation principle schematic diagram of phase shortage circuit.
In figure：1- power supplys, 2- detection circuits, 3- decision circuitries, 4- amplifying circuits, 5- protections circuit, 6- motors.
Specific embodiment
The following is a combination of the drawings in the embodiments of the present utility model, and the technical scheme in the embodiment of the utility model is carried out
It clearly and completely describes, it is clear that the described embodiments are only a part of the embodiments of the utility model rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are without making creative work
All other embodiments obtained shall fall within the protection scope of the present invention.
Please refer to Fig.1~2, in the utility model embodiment, it is a kind of it is simple check three phase electric machine whether phase shortage circuit, packet
Detection circuit 2, decision circuitry 3, amplifying circuit 4 and protection circuit 5 are included, three phase mains 1, detection circuit 2 are terminated before detection circuit 2
Decision circuitry 3 is terminated afterwards, and decision circuitry 3 connects amplifying circuit 4 below, and amplifying circuit 4 connects protection circuit 5 below, after protecting circuit 5
Face connects motor 6.
2 element of detection circuit includes R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12,3 element of decision circuitry
Including R13, R14, R15, C1, C2, C3, C4, TC783 chip, D1, D2, D3, R16, R17, VA1, VA2, VA3, VA4, VA5, put
Big circuit 4 includes N1, N2, and protection circuit 5 includes D4, L1, and 1,2,3,14 feet of TC783 chips meet VCC, and 7 feet meet GND.
Operation principle：Three-phase voltage signal A, B, C respectively enter 1,2,3 feet of TC783 chips through resistor voltage divider network, lead to
It crosses the presence that Schmidt's detection understanding signal is carried out to sine wave and enters after lack detection circuit detects to export and indicate, TC783
13 foot of chip is about 0.1-0.5uF for the external capacitor that circuit occurs for internal pulses, when three phase sine input is normal, corresponding A, B,
The output terminal of 1,2,3 feet of C input chips, 12,11, the 10 feet output of chip is low level；When having input signal in a certain phase
When, there will be high level on corresponding output pin, according to pile defection as a result, phase sequence indicating circuit will in the case of not phase shortage
Phase sequence is exported in a state that three-phase voltage signal A, B, C enter 1,2,3 feet of chip through circuit, the high electricity of 9 feet output of chip
Flat instruction positive sequence, and in the case where three-phase voltage signal A, B, C enter 1,2,3 feet states of chip through circuit, the 8 feet output of chip is high
Level indicating inverted sequence, under non-full-phase state, 9 feet and 8 feet of chip all export low level.In addition protection electricity has also been devised in circuit
Road, by the analysis to overcurrent, over-pressed signal, 5 feet of chip are sampling input terminal, input signal and voltage reference ratio in circuit
Compared with, and exported in 6 feet of chip, if sampling exports high level, 4 feet of chip will to the way of output higher than voltage in circuit
There are two types of control selections, 4 feet of chip connect low level, export not lock output, i.e. input high level output high level, input
Low level output low level, 4 feet of chip connect high level, export and are exported for locking, only input high level or the low electricity of input
It is all high level to put down its output, and user can be by controlling 4 foot incoming levels of chip to control output.After electric current reaches amplifier, mistake
Amplifier reaches motor after protection circuit 5, if electric current is excessive, circuit 5 is protected to disconnect, and protects motor 6.
It is obvious to a person skilled in the art that the utility model is not limited to the details of above-mentioned exemplary embodiment, and
And in the case of the spirit or essential attributes without departing substantially from the utility model, it can realize that this practicality is new in other specific forms
Type.Therefore, in all respects, the present embodiments are to be considered as illustrative and not restrictive, this practicality is new
The range of type is indicated by the appended claims rather than the foregoing description, it is intended that by containing in the equivalent requirements of the claims is fallen
All changes in justice and range are embraced therein.Any reference numeral in claim should not be considered as limitation
Involved claim.
Claims (6)
1. it is a kind of simple check three phase electric machine whether phase shortage circuit, including detection circuit (2), decision circuitry (3), amplifying circuit
(4) and protection circuit (5), which is characterized in that termination three phase mains (1), the detection circuit (2) before the detection circuit (2)
Termination decision circuitry (3) afterwards, the decision circuitry (3) connect amplifying circuit (4) below, and the amplifying circuit (4) connects protection below
Circuit (5), the protection circuit (5) connect motor (6) below.
2. it is according to claim 1 it is a kind of simple check three phase electric machine whether phase shortage circuit, which is characterized in that the inspection
Slowdown monitoring circuit (2) element includes R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12.
3. it is according to claim 1 it is a kind of simple check three phase electric machine whether phase shortage circuit, which is characterized in that it is described to sentence
Deenergizing (3) element include R13, R14, R15, C1, C2, C3, C4, TC783 chip, D1, D2, D3, R16, R17, VA1, VA2,
VA3、VA4、VA5。
4. it is according to claim 1 it is a kind of simple check three phase electric machine whether phase shortage circuit, which is characterized in that it is described to put
Big circuit (4) is including N1, N2.
5. it is according to claim 1 it is a kind of simple check three phase electric machine whether phase shortage circuit, which is characterized in that the guarantor
Protection circuit (5) is including D4, L1.
6. it is according to claim 3 it is a kind of simple check three phase electric machine whether phase shortage circuit, which is characterized in that it is described
1,2,3,14 feet of TC783 chips meet VCC, and 7 feet meet GND.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721750416.0U CN207518260U (en) | 2017-12-15 | 2017-12-15 | It is a kind of simple check three phase electric machine whether phase shortage circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721750416.0U CN207518260U (en) | 2017-12-15 | 2017-12-15 | It is a kind of simple check three phase electric machine whether phase shortage circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207518260U true CN207518260U (en) | 2018-06-19 |
Family
ID=62544086
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721750416.0U Active CN207518260U (en) | 2017-12-15 | 2017-12-15 | It is a kind of simple check three phase electric machine whether phase shortage circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207518260U (en) |
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2017
- 2017-12-15 CN CN201721750416.0U patent/CN207518260U/en active Active
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