CN2146803Y - Full protector for motor - Google Patents
Full protector for motor Download PDFInfo
- Publication number
- CN2146803Y CN2146803Y CN 92230644 CN92230644U CN2146803Y CN 2146803 Y CN2146803 Y CN 2146803Y CN 92230644 CN92230644 CN 92230644 CN 92230644 U CN92230644 U CN 92230644U CN 2146803 Y CN2146803 Y CN 2146803Y
- Authority
- CN
- China
- Prior art keywords
- circuit
- resistance
- triode
- power circuit
- motor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000001012 protector Effects 0.000 title 1
- 238000007493 shaping process Methods 0.000 claims abstract description 7
- 238000009413 insulation Methods 0.000 claims abstract description 4
- 239000003990 capacitor Substances 0.000 claims description 15
- 230000000087 stabilizing effect Effects 0.000 claims description 5
- 238000004804 winding Methods 0.000 abstract description 5
- 230000032683 aging Effects 0.000 abstract description 2
- 238000005070 sampling Methods 0.000 abstract 2
- 239000012071 phase Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000008384 inner phase Substances 0.000 description 1
- 238000010338 mechanical breakdown Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Images
Abstract
A full-protection device for motor is composed of an insulating casing, a printed circuit board, and power supply, sampling, anti-interference, shaping and search, amplifying and executing circuits. When the faults of the motor, the generator or the power supply transformer, such as damp, insulation aging, overload, mechanical faults, phase failure at the high-voltage side, phase failure at the low-voltage side, phase failure at the common bus, direct phase failure, internal phase failure and power supply frequency change occur, before a winding is burnt out, a fault sampling circuit can output reliable signals, so that after a transistor circuit is shaped, retrieved and amplified, an execution element is pushed to act, and the aim of automatic full protection is fulfilled.
Description
The utility model is a kind ofly can stop that motor, generator and supply transformer are various to burn the motor full protection devices that fault takes place.
At present; existing motor open-phase protection, integrated protection (or claiming multifunction protection) device; the variation of all adopting line current is as the fault sampled signal; when line current changes overrate very greatly the time; during respectively at the direct phase failure (fuse failure) or the direct phase failure and overload fault generation, motor is shielded.But it is multiple causing motor to burn fault, and line current changes not quite sometimes, also can cause motor to burn.The motor that the various faults of can not fundamentally stopping general protective device cause burns; The variation that is subject to outer signals or supply voltage cause misoperation or move unreliable; And generator, supply transformer are not shielded.
The purpose of this utility model is to avoid above-mentioned the deficiencies in the prior art and a kind of motor full protection device is provided; it can be protected after various faults take place, and motor is unlikely to be burnt; and can shield to generator, supply transformer; be not subjected to the variable effect of interference from outside signals and supply voltage; action is accurate, reliable operation.To because of motor, generator or supply transformer make moist, overload, stall, short circuit in winding, ageing of insulation, ring temperature are too high, ventilate be obstructed, mechanical breakdown or the phase failure of supply transformer high-pressure side, the low-pressure side phase failure, the directly phase failure, the inner phase failure and before supply voltage increases and the reasons such as variation of reduction and frequency cause winding to burn, all can cut off the electricity supply, avoid motor, generator or supply transformer to burn.
The purpose of this utility model is achieved in that in insulation crust, one printed circuit board (PCB) is set, above by power circuit (comprising bridge rectification, voltage stabilizing, filter circuit), amplify executive circuit, in the power circuit by capacitor step-down, the fault sample circuit, anti-jamming circuit, the shaping search circuit is formed.
By capacitor step-down, an end of capacitor and an input of AC power join in the power circuit, and an input of the other end of capacitor and bridge rectifier joins.The fault sample circuit is joined by an end of transducer and an end and the binding post of resistance, and the other end of transducer joins with the negative pole of power circuit and binding post, and the other end of resistance and the positive pole of power circuit join.Anti-jamming circuit is joined with the place of series connection of transducer and resistance by the base stage of triode, and an end of the emitter of triode and resistance joins, and the collector electrode of triode and the positive pole of power circuit join, and the other end of resistance and the negative pole of power circuit join.The shaping search circuit is interconnected by two triodes and five resistance.
Owing to adopt above scheme; the utility model can be stopped the various generations of burning fault of motor; be not subjected to interference from outside signals; be not subjected to the variation of supply voltage and misoperation or move unreliable; can shield to generator and supply transformer again, and the alternating voltage of 220 volts or 380 volts can directly use.Have highly sensitive, stable performance, reliable operation, action is accurately, and is multiple functional, simple structure.
Below in conjunction with drawings and Examples the utility model is described in further detail.
Accompanying drawing is the circuit theory diagrams of utility model.
1,2,3,4,5,6 is binding post among the figure; 7, capacitor; 8, bridge rectifier; 9, voltage stabilizing didoe; 10, electrolytic capacitor; 12, transducer; 11,14,15,16,17,18,20 is resistance; 13,19,21,22 is triode, 23, relay coil; 24, normally-closed contact.
As shown in drawings, make decompression current-limiting element by capacitor (7) among the power circuit A, one end of capacitor (7) and binding post (1) join, one input of the other end of capacitor and bridge rectifier (8) joins, another input of bridge rectifier (8) and binding post (2) join, the negative pole of the output cathode of bridge rectifier (8) and voltage stabilizing didoe (9), the positive pole of electrolytic capacitor (10) joins, the positive pole of the output negative pole of bridge rectifier (8) and voltage stabilizing didoe (9), the negative pole of electrolytic capacitor (10) joins, form stabilized voltage power supply, make this utility model not be subjected to alternating voltage variable effect in the 170--450 volt, binding post (1), (2) and can directly insert the alternating voltage of 220 volts or 380 volts; Fault sample circuit B employing temperature coefficient is little, response speed fast, be subjected to variations in temperature to reflect transducer (12) rapidly near equaling copper cash, one end of one end of transducer (12) and resistance (11) and binding post (5) join, the other end of transducer (12) joins with the negative pole of power circuit A and binding post (6), the other end of resistance (11) and the positive pole of power circuit A join, and form bleeder circuit.In use, transducer (12) is placed on motor, generator or supply transformer inside, when they broke down, transducer (12) all can become the signal of telecommunication with temperature signal and transport out; Anti-jamming circuit C forms anti-phase follower by triode (13) and resistance (14), and it has the advantages that input impedance is big, output impedance is little, it is reached isolate the outer signals interference effect.The base stage of triode (13) is joined with the place of serial connection of transducer (12) and resistance (11), one end of the emitter of triode (13) and resistance (14) joins, the collector electrode of triode (13) and the positive pole of power circuit A join, and the other end of resistance (14) and the negative pole of power circuit A join; Shaping search circuit D is made up of triode (19) and triode (21) and resistance (15), (16), (17), (18), (20) and penetrates the coupling flip-flop circuit, reaches the purpose of shaping retrieval.The base stage of one end of one end of resistance (15) and resistance (16) and triode (19) is joined, and joins with the emitter of triode (13).The other end of resistance (15) and the negative pole of power circuit A join, the other end of resistance (16) and the positive pole of power circuit A join, the emitter of the emitter of triode (19) and triode (21) and the negative pole of power circuit A join, one end of one end of the collector electrode of triode (19) and resistance (17) and resistance (18) joins, the other end of resistance (17) and the positive pole of power circuit A join, the base stage of one end of the other end of resistance (18) and resistance (20) and triode (21) is joined, and the other end of resistance (20) and the negative pole of power circuit A join; Amplifying executive circuit E is made up of triode (22) and relay coil (23) and normally-closed contact (24).The collector electrode of the base stage of triode (22) and triode (21) joins, the collector electrode of triode (22) and the positive pole of power circuit A join, one end of the emitter of triode (22) and relay coil (23) joins, the other end of relay coil (23) and the negative pole of power circuit A join, the two ends of normally-closed contact (24) join with binding post (3), (4) respectively, normally-closed contact (24) is serially connected in the governor circuit electromagnetic switch pull-in winding loop, makes it play the effect of amplifying and cutting off the electricity supply.
The utility model operation principle: when electric motor normal working, transducer (12) output electronegative potential causes the emitter of triode (13) to export electronegative potential, makes triode (19) be in cut-off state, collector electrode output high potential.Triode (21) saturation conduction is joined, made to the base stage of triode (21) by the collector electrode of upper offset resistance (18) and triode (19), and collector electrode output electronegative potential causes triode (22) base potential very low.Triode (22) is in reliable cut-off state, and relay coil (23) does not have electric current to pass through, and normally-closed contact (24) conducting always makes the adhesive of motor governor circuit electromagnetic switch, electric motor normal working.
After motor breaks down, when winding temperature reaches setting value, circuit overturn rapidly (working condition is then opposite); at this moment; triode (13) emitter output high potential makes triode (19) saturation conduction, and triode (21) ends; triode (22) saturation conduction; relay coil (23) obtains electronic work, and normally-closed contact (24) is opened, and cuts off the governor circuit power supply; the motor stall reaches the purpose of full guard motor.
Claims (5)
1, a kind of motor full protection device; in insulation crust; one printed circuit board (PCB) is set; comprise bridge rectification, voltage stabilizing, filter circuit by power circuit above; amplify executive circuit and form, it is characterized in that: in the power circuit by capacitor step-down, the fault sample circuit; anti-interference buffer circuit, the shaping search circuit is formed.
2, motor full protection device according to claim 1 is characterized in that: by capacitor step-down, an end of capacitor and an input of AC power join in the power circuit, and an input of the other end of capacitor and bridge rectifier joins.
3, motor full protection device according to claim 1; it is characterized in that: the fault sample circuit is joined by an end of transducer and an end and the binding post of resistance; the other end of transducer joins with the negative pole of power circuit and binding post, and the other end of resistance and the positive pole of power circuit join.
4, motor full protection device according to claim 1; it is characterized in that: anti-jamming circuit is joined with the place of series connection of transducer and resistance by the base stage of triode; one end of the emitter of triode and resistance joins; the collector electrode of triode and the positive pole of power circuit join, and the other end of resistance and the negative pole of power circuit join.
5, according to claims 1 described motor full protection device, it is characterized in that: the shaping search circuit is interconnected by two triodes and five resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92230644 CN2146803Y (en) | 1992-08-18 | 1992-08-18 | Full protector for motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92230644 CN2146803Y (en) | 1992-08-18 | 1992-08-18 | Full protector for motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2146803Y true CN2146803Y (en) | 1993-11-17 |
Family
ID=33773709
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92230644 Expired - Fee Related CN2146803Y (en) | 1992-08-18 | 1992-08-18 | Full protector for motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2146803Y (en) |
-
1992
- 1992-08-18 CN CN 92230644 patent/CN2146803Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |