CN2152334Y - Double loop motor protector - Google Patents
Double loop motor protector Download PDFInfo
- Publication number
- CN2152334Y CN2152334Y CN 93230590 CN93230590U CN2152334Y CN 2152334 Y CN2152334 Y CN 2152334Y CN 93230590 CN93230590 CN 93230590 CN 93230590 U CN93230590 U CN 93230590U CN 2152334 Y CN2152334 Y CN 2152334Y
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- CN
- China
- Prior art keywords
- output
- loop
- double
- double loop
- motor protector
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- Expired - Fee Related
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Abstract
The utility model discloses a double-loop motor protector, principally comprising a sampling device connected to a motor three-phase wire, a double-loop tripping actuating device, a signal comparing device, a working power supply device, and a double-loop tripping control device. The double-loop motor protector is principally suitable for protecting the phase interruption, the short circuit, the over current, and the over load of the motor. Especially, the double-loop motor protector adopts the comparison of an exclusive or gate circuit in the signal comparison device, which enables the protective action to accurate. The double-loop protection of the utility model solves the defect that protection can not be implemented because the armature of an alternating current contactor is jammed and the contact is welded; the double-loop motor protector adopts two-stage backup protection to delay actuation, so the double-loop motor protector has good protection performance.
Description
The utility model has been announced a kind of double loop protector of motor.
At present, motor protector all is to finish protection to motor by A.C. contactor, in case scaling loss appears in A.C. contactor, the contact weldering is dead or during the armature catching phenomenon, it does not all have protective effect to phase shortage, overcurrent or overload, still can burn out motor.
For overcoming the existing above-mentioned defective of protector, design provides a kind of double loop protector to the purpose of this utility model exactly.
The purpose of this utility model is achieved in that its adopts to the sampling rate of motor three-phase electricity, implements first class of protection or second class protection is implemented in the time-delay back when fault.
The utility model has the advantages that and need not to establish in addition working power; its working power is taken from the motor triple line, avoids because of the influence of working power faults itself to protection, adopts two deferred action protections of returning; neither influence motor overcurrent of normal moment, can when electrical fault, fully implement protection again.
Accompanying drawing 1: the utility model block diagram.
Accompanying drawing 2: sampling of the present utility model, signal comparison, working power and double loop tripping operation control device structural representation.
In the accompanying drawing, L
1～L
3-current transformer, 1,2, the 3-bridge-type rectifier, R
1～R
15-resistance, W
1, W
2-adjustable resistance, C
1～C
8-electric capacity, IC
1, IC
2-gate circuit, IC
3, IC
4-NOR gate circuit, WY-three terminal regulator, BG
1～BG
4-triode, D
1～D
10Diode, FD-Light-Emitting Diode, SCR-controllable silicon, XJ
1, XJ
2-relay, J
1, J
2The relay normally-closed contact, FV
1, FV
2-fuse, QF-air switch tripping coil, K
1～K
3The air switch contact, KM-A.C. contactor, K
4～K
6-ac contactor contact, K
7-A.C. contactor normally opened contact, SB
1-shut down switch, SB
2-start switch.
Describe the concrete structure of the present utility model and the course of work in detail below in conjunction with accompanying drawing.
The utility model comprises sampler, the signal comparison means, and the working power device, double loop tripping operation control device and double loop tripping operation final controlling element are formed, and wherein, sampler is by L
1-L
3, rectifying device 1,2,3, resistance R
1-R
6, C
1-C
4, D
1-D
3Form L
1, L
2, L
3Take out the motor three-phase current respectively separately after rectifying device 1,2,3 rectifications of footpath, again footpath R in parallel separately
1And C
1, R
3And C
2, R
5And C
3Ground connection, three rectifying devices 1,2,3 D that connects separately
1, D
2, D
3The back also meets C
4Ground connection is one group of output signal, and three rectifying devices 1,2,3 also are connected in series R respectively
2, R
4, R
6Form another group output signal.
The signal comparison means is by R
7-R
10, D
4-D
7, IC
1, IC
2, IC
3, W
1,, C
5Form, wherein R
7Be connected to D in the sampler
1, D
2, D
3Output, and the series connection W
1, W
2, R
9Ground connection, IC
1Series connection D
4, R
10Back and C
5Parallel connection is connected in series R again
8Be connected to W
1The adjustable side, D
7Be connected to C
5Positive pole and C
4Positive pole between, form C
5Rapid discharge loop; IC
2And IC
3Input be connected to R respectively
2, R
4Output and R
4, R
6Output, IC
2, IC
3The output D that connects respectively
5, D
6After be connected to D
4Output, as the output of signal comparison means.
The working power device is by WY, D
10, C
6Form, wherein the input of WY is connected to C
4Positive pole, its output series connection D
10Again through C
6Ground connection filtering is as working power output, its 3rd end ground connection.
Double loop tripping operation control apparatus comprises C
7, C
8, X
1, XJ
2, IC
4, R
11-R
15, D
8, D
9, FD, BG
1-BG
4, SCR forms, wherein, BG
1With BG
2After forming the tandem triode, BG
1, BG
2Collector electrode string XJ
1Be connected to C
4Positive pole, D
8Be parallel to XJ
1Two ends, BG
1Base stage series connection R
11, IC
4, C
7Meet D
4, D
5, D
6Output, C
7The negative pole R that also connects
12Be connected to BG
2Puberty back ground connection extremely, form the tripping operation control loop that the first order does not have independent current source; BG
3, BG
4After forming the tandem triode, BG
3Base stage series connection R
13Be connected to D
4, D
5, D
6Output, BG
3, BG
4Grounded collector, BG
4Emitter series connection R
14, FD is connected to D
7Output, XJ
2D in parallel
9Back serial connection SCR is connected to C
6Both positive and negative polarity between, R
15Series connection C
8Form delay circuit and be connected to D
4, D
5, D
6Between output and the ground, R
15Series connection C
8Form delay circuit and be connected to D
4, D
5, D
6Between output and the ground, C
8The positive level control end that meets SCR form second level delay tripping control loop.
Tripping operation final controlling element in double loop comprises J
1, J
2, FV
1, FV
2, QF, KM, SB
1, SB
2, wherein, J
1Serial connection FV
1, KM, SB
1, SB
2, the normally opened contact K of KM
7With SB
2And meet K
4, K
5, K
6The contact seals in the triple line, forms first order tripping operation and carries out the loop; J
2Serial connection FV
2, QF, the contact K of QF
1, K
2, K
3Seal in and form tripping operation execution loop, the second level in the triple line.
When using the utility model, by connection shown in Figure 1 this device is installed, closed K
1, K
2, K
3, motor is in treats starting state.When needing actuating motor, press SB
2, KM has electric current to pass through, K
4-K
7Closure, K
7Closure makes KM keep energising, K
4-K
6Normally closed, electronic motor-driven running; When normal shutdown, press SB
1Separate KM dead electricity, K
4-K
7Separate, the motor outage, and ready for resetting.
During the motor operate as normal, L
1-L
3Take out normal three-phase current, D
1-D
3, R
2, R
4, R
6, export normal current potential, IC
1, IC
2, IC
3The output electronegative potential, BG
1, BG
2End BG
3, BG
4Conducting, C
8Electronegative potential just very, XJ
1, XJ
2The branch road no current, J
1, J
2Remain closed, control device is failure to actuate.
When the phase failure, short circuit, fault appear in motor, L
1-L
3Take out asymmetric three-phase current, R
2, R
4, R
6Export inequality, IC
2Or/and IC
3High potential output is arranged, through C
7, R
12Time-delay, IC
4The output high potential, BG
1, BG
2Conducting, XJ
1Through D
1, D
2, D
3In any or two obtain electric current, its normally-closed contact J
1Disconnect KM dead electricity, K
4-K
7Tripping operation; When overcurrent, overload appear in motor, L
1-L
3Taking-up is greater than normal value electric current, D
1-D
3High potential output is arranged, through R
8, C
5After the time-delay, D
4The output high potential is through C
7, IC
4The output high potential, BG
1, BG
2Conducting, with above-mentioned, XJ
1There is electric current to pass through, KM dead electricity, K
4-K
7Tripping operation; When above-mentioned two kinds of situations tripping operation, if the contact K of A.C. contactor KM occurs
4-K
6Weldering is dead, KM armature clamping stagnation K
4-K
6When being failure to actuate, through R
15, C
8Anodal current potential raises, and triggers the SCR conducting, XJ
2There is electric current to pass through, J
2Disconnect air switch dropout coil of wire QF dead electricity, K
1-K
3Disconnect, play overall protective effect.
Claims (6)
1, a kind of double loop motor protector is characterized in that being made up of sampler, double loop tripping operation final controlling element and the signal comparison means, working power device, the double loop tripping operation control device that are connected in the motor triple line.
2, double loop as claimed in claim 1 motor protector is characterized in that described sampler is by L
1-L
3, rectifying device 1,2,3, resistance R
1-R
6, C
1-C
4, D
1-D
3Form L
1, L
2, L
3Take out the motor three-phase current respectively separately after rectifying device 1,2,3 rectifications of footpath, again footpath R in parallel separately
1And C
1, R
3And C
2, R
5And C
3Ground connection, three rectifying devices 1,2,3 D that connects separately
1, D
2, D
3The back also meets C
4Ground connection is one group of output signal, and three rectifying devices 1,2,3 also are connected in series R respectively
2, R
4, R
6Form another group output signal.
3, double loop as claimed in claim 1 motor protector is characterized in that described signal comparison means is by R
7-R
10, D
4-D
7, IC
1, IC
2, IC
3, W
1, W
2, C
5Form, wherein R
7Be connected to D in the sampler
1, D
2, D
3Output, and the series connection W
1, W
2, R
9Ground connection, IC
1Series connection D
4, R
10Back and C
5Parallel connection is connected in series R again
8Be connected to W
1The adjustable side, IC
2And IC
3Input be connected to R respectively
2, R
4Output and R
4, R
6Output, IC
2, IC
3The output D that connects respectively
5, D
6After be connected to D
4Output, as the output of signal comparison means.D
7Be connected to C
5Positive pole and C
4Positive pole between, form C
5Rapid discharge loop.
4, double loop as claimed in claim 1 motor protector is characterized in that described working power device is by WY, D
10, C
6Form, wherein the input of WY is connected to C
4Positive pole, its output series connection D
10Again through C
6Ground connection filtering is as working power output, its 3rd end ground connection.
5, double loop as claimed in claim 1 motor protector is characterized in that the tripping operation of described double loop controls and comprises C
7, C
8, XJ
1, XJ
2, IC
4, R
11-R
15, D
8, D
9, FD, BG
1-BG
4, SCR forms, wherein, BG
1With BG
2BG behind the composition tandem triode
1, BG
2Collector electrode string XJ
1Be connected to C
4Positive pole, D
8Be parallel to XJ
1Two ends, BG
1Base stage series connection R
11, IC
4, C
7Meet D
4, D
5, D
6Output, C
7Negative pole series connection R
12Be connected to BG
2Emitter after ground connection, form the tripping operation control loop that the first order does not have independent current source; BG
3, BG
4After forming the tandem triode, BG
3Base stage series connection R
13Be connected to D
4, D
5, D
6Output, BG
3, BG
4Grounded collector, BG
4Emitter series connection R
14, FD is connected to D
7Output, XJ
2D in parallel
9Back serial connection SCR is connected to C
6Both positive and negative polarity between, R
15Series connection C
8Form delay circuit and be connected to D
4, D
5, D
6Between output and the ground, R
15Series connection C
8Formation from the time circuit be connected to D
4, D
5, D
6Between output and the ground, C
8The positive level control end that meets SCR form second level delay tripping control loop.
6, double loop as claimed in claim 1 motor protector is characterized in that described double loop tripping operation final controlling element comprises J
1, J
2, FV
1, FV
2, QF, KM, SB
1, SB
2, wherein, J
1Serial connection FV
1, KM, SB
1, SB
2, the normally opened contact K of KM
7With SB
2And meet K
4, K
5, K
6The contact seals in the triple line, forms first order tripping operation and carries out loop, J
2Serial connection FV
2, QF, the contact K of QF
1, K
2, K
3Seal in and form tripping operation execution loop, the second level in the triple line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93230590 CN2152334Y (en) | 1993-04-03 | 1993-04-03 | Double loop motor protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93230590 CN2152334Y (en) | 1993-04-03 | 1993-04-03 | Double loop motor protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2152334Y true CN2152334Y (en) | 1994-01-05 |
Family
ID=33807214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93230590 Expired - Fee Related CN2152334Y (en) | 1993-04-03 | 1993-04-03 | Double loop motor protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2152334Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101409441B (en) * | 2008-10-23 | 2011-04-20 | 蔡起仲 | Overcurrent protection circuit for switch magneto resistance speed-regulating motor |
| CN101707351B (en) * | 2009-09-18 | 2012-05-30 | 珠海瑞捷电气有限公司 | Protection circuit for preventing microcomputer protection device against interference and error actions |
-
1993
- 1993-04-03 CN CN 93230590 patent/CN2152334Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101409441B (en) * | 2008-10-23 | 2011-04-20 | 蔡起仲 | Overcurrent protection circuit for switch magneto resistance speed-regulating motor |
| CN101707351B (en) * | 2009-09-18 | 2012-05-30 | 珠海瑞捷电气有限公司 | Protection circuit for preventing microcomputer protection device against interference and error actions |
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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 |