CN2165557Y - Multifunctional protector for motor - Google Patents
Multifunctional protector for motor Download PDFInfo
- Publication number
- CN2165557Y CN2165557Y CN 93241756 CN93241756U CN2165557Y CN 2165557 Y CN2165557 Y CN 2165557Y CN 93241756 CN93241756 CN 93241756 CN 93241756 U CN93241756 U CN 93241756U CN 2165557 Y CN2165557 Y CN 2165557Y
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- CN
- China
- Prior art keywords
- pin
- protection
- motor
- circuit
- power
- 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
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- Protection Of Generators And Motors (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
The utility model belongs to a multifunctional protection device for a motor which is used for an alternating current-direct current motor, a two-phase motor and a three-phase motor in common, comprising a power supply circuit which supplies a working power supply for the protector, a multifunctional protection module for the motor and a contactor controlled by a transistor. The utility model has the functions of overcurrent protection, lockedrotor protection, delay protection, electricity leakage protection, overheating protection, open-phase protection, overvoltage protection, overcurrent protection, self-damage protection, and explosion protection. The utility model has the characteristic of energy saving. The utility model is versatile.
Description
The utility model relates to a kind of motor protecter, the protector of particularly a kind of two-phase or three phase alternating current motor or direct current machine.
The prior motor protector has the phase failure; under-voltage; overvoltage; overcurrent and delay protection function, but can only be applicable to one type motor, only be applicable to alternating current machine as ac motor protector; the direct current machine protector only is applicable to direct current machine; can not be general, and defencive function only limits to severally, can not do comprehensively protection to motor.
The purpose of this utility model provides the multi-functional electric motor protecting device of a kind of alternating current-direct current, two-phase, three phase alternating current motor compatibility.
The utility model comprises one for protector provides the power circuit of working power, and Qi Tete is: the power circuit input is connected with the 14th, 15 pin of multi-functional electric motor protecting module I C, and the power output end positive pole passes through resistance R
2Be connected with the 7th pin of IC; The power output end minus earth; Bidirectional triode thyristor SCR be connected on after contactor circuit QC is connected in series and the 13rd pin of IC between, the control termination triode BG of SCR
1Collector electrode; The 8th pin of IC passes through resistance R
1Respectively with electrochemical capacitor C
1Anode, BG
1Base stage join C
1Negative terminal, BG
1Emitter ground connection respectively; Meet potentiometer W between the 11st pin of IC and the ground
1, W
1The 12nd pin of adjusting termination IC; Meet potentiometer W between the 9th pin of IC and the ground
2, W
2The 10th pin of adjusting termination IC; The 13rd, 14,15 pin of IC meet contactor normally closed contact QC respectively
1, QC
2, QC
3An end, contactor normally closed contact QC
1, QC
2, QC
3The other end connect the winding of motor respectively; The 1st, 2,3 pin of IC connect three-phase alternating current respectively or any bipod wherein connects two-phase alternating current or direct current; The 4th pin of IC connects motor housing; The 5th pin of IC connects the heat sensor that is placed on the motor; The 6th pin ground connection of IC.
The utlity model has overload protection, rotation-clogging protection, delay protection, earth leakage protective, overtemperature protection, open-phase protection, overvoltage protection, overcurrent protection, self damage protection, the function of explosive-proof protector and general, energy-conservation characteristics.
Fig. 1 is a circuit diagram of the present utility model.
In Fig. 1, IC is that model is the multi-functional electric motor protecting integration module of LH932-02, and wherein 1,2,3 pin are three-phase or two-phase ac input end; also can input DC power; because of there is the power supply preference circuit inside, 4 pin are for the electric leakage input, when drain voltage 〉=24
The time, internal trigger circuit and switching circuit work, at high level of 8 pin output, 5 pin are the temperature input, when temperature surpassed setting, IC internal trigger circuit and switching circuit work were at high level of 8 pin output, 16 pin are test lead, when connecing low level, and 8 pin output high level.13,14,15 pin are clutch end and control end, are communicated with 1,2,3 pin respectively when internal damage.7 pin are power end, and 17,18 is external contactor end or relay end, and 8 pin are the control output end, and 11,12 pin are the power setting end.9,10 for triggering reference edge.Diode D
1, D
2, D
3, D
4, capacitor C
2Form power circuit, for protector provides working power.
Bidirectional triode thyristor SCR is by NPN type triode BG
1Control, make the control switch of contactor coil QC.QC
1, QC
2, QC
3Be three groups of normally closed contacts of contactor.If BG
1Be positive-negative-positive triode, QC
1, QC
2, QC
3Should be three groups of normal opened contacts of contactor.
Potentiometer W
1Be the power adjustments resistance of integration module IC.
Potentiometer W
2The triggering reference voltage that is integration module IC is regulated resistance.
The utility model can also insert a button between the 16th pin of IC and ground, so that protector is tested.
The multi-functional electric motor protecting integration module
IC inside mainly contains compositions such as current sampling circuit, voltage sample circuit, switching circuit, circuits for triggering, reference circuit, balancing circuitry, drive circuit, voltage stabilizing circuit AC-DC conversion.Have overvoltage, overcurrent, overload, delay, electric leakage, temperature control, phase shortage, short circuit, decrease multiple function such as conversion certainly.Operation principle of the present utility model is as described below:
1, when overvoltage, the overvoltage circuit work in the IC, and trigger switch circuit and drive circuit works are exported a high level, BG at 8 pin of IC
1Conducting, power relay disconnect motor are quit work, and warning circuit also sends alarm call.
2, overcurrent protection: when operating current greater than the 1.4-1.8 of rated current doubly; and running time is when exceeding schedule time; sample circuit work in the IC; sample circuit send a signal to circuits for triggering; circuits for triggering send a signal to drive circuit; drive circuit is from high level of 8 pin output of IC, BG
1Conducting, power relay get electric break contact, and motor quits work.
3, overload protection: the too heavy or band heavy-load start when exceeding schedule time when applied load, another combinational circuit work of the sample circuit in the IC, its operating principle is described with 2.
4, delay protection: when after dispatch from foreign news agency has a power failure suddenly, sending a telegram here suddenly again; delay protection circuit in the IC is not also set up stable operating state; so the interlock circuit in the IC quits work; the inner no closure signal of IC; motor is not worked, when arriving setting-up time, and the interlock circuit work in the IC; there is signal output IC inside, and motor is reworked.
5, earth leakage protective: when motor housing had the drain voltage of a 18-24V, the leakage circuit in the IC starts rapidly made high level of IC8 pin output, BG
1Conducting, power relay get electric work, and the contact disconnects, and motor quits work.
6, open-phase protection: when phase shortage, the balancing circuitry work in the IC, the output signal of balancing circuitry makes interlock circuit work, IC8 pin output high level, BG
1Conducting, power relay gets electric, and the contact disconnects, and motor quits work.
7, overtemperature prote: when motor temperature reached 90 ℃-120 ℃ (setting as required), the temperature control circuit work in the IC made drive circuit works after the temperature control circuit output signal, and the IC8 pin is exported a high level, relay work, and motor is stopped transport.
8, rotation-clogging protection: when certain accident made motor rotation blockage, another current setting circuit work of the current sampling circuit in the IC behind this circuit output signal, shut down motor through other circuit operation.
9, explosion prevention function: owing to used multifunctional high-power IC module and non-contact switch circuit in the circuit, so have explosion-proof performance.
10, general utility functions: because the integrated circuit function of several working ways in the IC; phase shortage circuit in initially meeting two phase time IC at first is changed to nought state; make it lose the phase shortage ability to work, so two-phase, three-phase circuit can both be worked, AC/DC motor all can be protected.Because the optimization power supply circuit is arranged in the IC, make the circuit in the IC at first forward the alternate current operation state to when inserting any three-phase alternating current in the ban, otherwise just be changed to the DC operation state, but externally need connect an alternating current-direct current trigger switch.
11, energy-conservation: because IC quiescent current when not starting is inhaled the electric current of keeping that 0.3-1.2mA is arranged, adopted the normally-closed contact of power relay to connect motor in addition, ability consuming electric power when power relay has only protection is so protector has energy-conserving action.
12, self damages protection; Because the actual measurement life-span of IC is 10
4-10
5Hour, so long service life, change-over circuit just transfers direct running status in several milliseconds when self damages, and has just lost the multifunction protection effect, does not influence motor and normally moves.
The 17th, 18 pin of multi-functional electric motor protecting module can connect magneto bell or news Chinese percussion instrument.
Contactor can adopt the relay with 3 groups of normally closed contacts to replace.
The utility model can be installed in the control cubicle of any model, also can be installed in any power line, also can be directly installed on the motor of any model.
Claims (1)
1, a kind of multi-functional electric motor protecting device has one for protector provides the circuit of working power, and it is characterized in that: the input of power circuit is connected with the 14th, 15 pin of multi-functional electric motor protecting integration module IC, and the power output end positive pole passes through resistance R
2Be connected the power output end minus earth with the 7th pin of IC; Bidirectional triode thyristor SCR is with after contactor coil QC is connected in series, be connected on and the 13rd pin of IC between, the control termination triode BG of SCR
1Collector electrode; The 8th pin of IC passes through resistance R
1Respectively with electrochemical capacitor C
1Anode, BG
1Base stage join C
1Negative terminal, BG
1Emitter ground connection respectively; Meet potentiometer W between the 11st pin of IC and the ground
1, W
1The 12nd pin of adjusting termination IC; Meet potentiometer W between the 9th pin of IC and the ground
2, W
2The 10th pin of adjusting termination IC; The 13rd, 14,15 pin of IC meet contactor normally closed contact QC respectively
1, QC
2, QC
3An end, contactor normally closed contact QC
1, QC
2, QC
3The other end connect the winding of motor respectively; The 1st, 2,3 pin of IC connect three-phase alternating current respectively or any bipod wherein connects two-phase alternating current or direct current; The 4th pin of IC connects motor housing; The 5th pin of IC connects the heat sensor that is placed on the motor; The 6th pin ground connection of IC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93241756 CN2165557Y (en) | 1993-10-14 | 1993-10-14 | Multifunctional protector for motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93241756 CN2165557Y (en) | 1993-10-14 | 1993-10-14 | Multifunctional protector for motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2165557Y true CN2165557Y (en) | 1994-05-18 |
Family
ID=33815641
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93241756 Expired - Fee Related CN2165557Y (en) | 1993-10-14 | 1993-10-14 | Multifunctional protector for motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2165557Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1034618C (en) * | 1994-03-31 | 1997-04-16 | 黄旭珠 | Full-function protector for electric machine |
| CN104218528A (en) * | 2013-06-04 | 2014-12-17 | 国家电网公司 | Integrated motor protector |
| CN104333165A (en) * | 2014-11-25 | 2015-02-04 | 武汉东方思创应急装备科技有限公司 | Explosion-proof electric machine for controlling automatic self-rescuer |
-
1993
- 1993-10-14 CN CN 93241756 patent/CN2165557Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1034618C (en) * | 1994-03-31 | 1997-04-16 | 黄旭珠 | Full-function protector for electric machine |
| CN104218528A (en) * | 2013-06-04 | 2014-12-17 | 国家电网公司 | Integrated motor protector |
| CN104333165A (en) * | 2014-11-25 | 2015-02-04 | 武汉东方思创应急装备科技有限公司 | Explosion-proof electric machine for controlling automatic self-rescuer |
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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 |