CN2511029Y - Electric motor and compressor protector - Google Patents
Electric motor and compressor protector Download PDFInfo
- Publication number
- CN2511029Y CN2511029Y CN 01247530 CN01247530U CN2511029Y CN 2511029 Y CN2511029 Y CN 2511029Y CN 01247530 CN01247530 CN 01247530 CN 01247530 U CN01247530 U CN 01247530U CN 2511029 Y CN2511029 Y CN 2511029Y
- Authority
- CN
- China
- Prior art keywords
- circuit
- saltus step
- triode
- protector
- 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
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model relates to a protector for the motor and compressor. A protection circuit of the protector comprises a decompression rectifying circuit, a signal recognition circuit, a delay jumping circuit, an overvoltage protective circuit, an after jump protection voltage supply circuit and an ac contactor. The protector can protect the motor or compressor under conditions of undervoltage, overvoltage, and over-current caused by any reason, and make the circuit return to work rapidly after the circuit failure is eliminated.
Description
The utility model relates to a kind of safety guard of electromechanical equipment, particularly a kind of motor and compressor protector.
In industrial and agricultural production and life, the situation that, overvoltage under-voltage owing to circuit, overcurrent or other reason cause motor or compressor damage takes place often, so that cause certain loss or bring many troubles for country, collective or individual.The device that is used for motor and compressor protection at present generally has fuse, stabilized voltage power supply, thermal protector and thermal relay etc.; with fuse during as the protective device of motor; because the rated current of fuse is greater than the rated current of motor; when circuit overcurrent blowout; motor burns out prior to fuse, so it does not generally have safeguard protection effect preferably to motor.
Stabilized voltage power supply can stabilizing circuit voltage, motor or compressor are implemented safeguard protection at circuit during under-voltage or overvoltage, but when the circuit overcurrent, do not have the effect of safeguard protection.Particularly when motor or compressor horsepower are big, stabilized voltage power supply will lose defencive function under-voltage, overvoltage.
The operation principle of thermal protector and thermal relay is when the circuit overcurrent; cause the heating of its inner tungsten filament, cause the saltus step of being heated of sheet metal in its structure then, break away from the contact; outage to be reaching the purpose of protection motor or compressor, but do not have the effect of safeguard protection when the circuit overvoltage.Particularly when passing through instantaneous large-current in the circuit; the sheet metal of thermal protector or thermal relay inside has little time the saltus step of being heated; and cause motor or compressor to burn out, so they during under-voltage or overcurrent, do not have safeguard protection effect to motor or compressor at circuit yet.And after fault was eliminated, circuit can not recover operate as normal rapidly.
The purpose of this utility model provides a kind of motor and compressor protection device, and it can cause that circuit is under-voltage in any reason, when overvoltage and overcurrent, motor in the circuit or compressor are played reliable safeguard protection effect.
Motor described in the utility model and compressor protector are made of protector outer casing and inner protective circuit thereof; this protective circuit comprises a step-down rectifying circuit, A.C. contactor, a signal recognition circuit, time-delay saltus step circuit, overvoltage crowbar and saltus step protection back voltage supply circuit, and wherein signal recognition circuit is by coil L
1With potentiometer W and connect the back with triode BG
1And relay J
1Be formed by connecting.Time-delay saltus step circuit is by resistance R
2, R
3, capacitor C
2, triode BG
2And relay J
2Be formed by connecting, and signal recognition circuit repeat circuit J
1Closing point and time-delay saltus step circuit in resistance R
2Connect.Overvoltage crowbar is by resistance R
4, triode BG
3And relay J
2Be formed by connecting.Saltus step protection back voltage supply circuit is by capacitor C
3, resistance R
5, R
6The normal contact that reaches A.C. contactor CJ is formed by connecting, and the triode BG in this normal contact and the time-delay saltus step circuit
2Base stage connect.
Motor described in the utility model and compressor protector are owing to comprise an A.C. contactor, signal recognition circuit, time-delay saltus step circuit, overvoltage crowbar and saltus step protection back voltage supply circuit in its protective circuit; make that it is under-voltage at circuit, all can play the safeguard protection effect when overvoltage and overcurrent motor or compressor; and after fault is eliminated, can make circuit recover operate as normal rapidly.Because this protector has the potentiometer of a scalable resistance in its protective circuit, thereby makes its motor that can be applicable to various power or compressor, and is not subjected to the influence of ambient temperature and mechanical oscillation in the ordinary course of things.The voltage allowed band of this protector operate as normal wide (140-280V), and in this voltage range, the performance of protector is not subjected to the influence of voltage fluctuation.
Now in conjunction with the accompanying drawings the utility model is described in further detail.
Fig. 1 is the circuit theory diagrams of motor described in the utility model and compressor protector.
This protector is made of shell and inner protective circuit thereof, and as shown in Figure 1, this protective circuit comprises a step-down rectifying circuit F
1, A.C. contactor CJ, signal recognition circuit F
2, time-delay saltus step circuit F
3, overvoltage crowbar F
4And saltus step protection back voltage supply circuit F
5, step-down rectifying circuit F wherein
1Constitute signal recognition circuit F by transformer B and bridge rectifier
2By coil L
1With potentiometer W and connect the back with triode BG
1And relay J
1Be formed by connecting; Time-delay saltus step circuit F
3By resistance R
2, R
3, capacitor C
2, triode BG
2And relay J
2Be formed by connecting, and signal recognition circuit F
2Repeat circuit J
1Closing point and time-delay saltus step circuit F
3In resistance R
2Connect; Overvoltage crowbar F
4By resistance R
4, triode BG
3And relay J
2Be formed by connecting; Saltus step protection back voltage supply circuit F
5By capacitor C
3, resistance R
5, R
6The normal contact that reaches A.C. contactor CJ is formed by connecting, and this normal contact and time-delay saltus step circuit F
3In triode BG
2Base stage connect.At triode BG
1, BG
2And BG
3Base stage on the voltage stabilizing didoe DW that respectively connects.The operation principle of its circuit is as follows:
One, when circuit is under-voltage, the magnetic that the voltage of circuit does not reach A.C. contactor CJ closes voltage, and A.C. contactor CJ not magnetic closes, and circuit disconnects, and realizes under-voltage protection function.
Two, when the circuit overvoltage, step-down rectifying circuit F
1The output voltage height, R then
4The voltage height that passes through makes triode BG
3Conducting, thus make relay J
2Magnetic closes, J
2K disconnects, then A.C. contactor CJ saltus step, and circuit disconnects, and realizes over-voltage protecting function.
Three, when the circuit overcurrent, coil L
1Produce induced voltage, give triode GB through potentiometer W
1Base voltage makes triode BG
1Conducting, relay J
1Magnetic closes, J
12,3 contactings of K, capacitor C
2Charging, the charging time-delay is after R
3Give triode BG
2Base voltage makes BG
2Conducting, then relay J
2Magnetic closes, thereby disconnects J
2K, A.C. contactor CJ saltus step, circuit disconnects, and realizes overcurrent protection function; Simultaneously, the normal contacting of A.C. contactor CJ, saltus step protection back voltage supply circuit F
5Supply with triode BG
2Base voltage makes relay J
2Keep magnetic to close (capacitor C
3Delay function is arranged, so when start, do not give triode BG when energising
2Voltage).
Claims (2)
1, a kind of motor and compressor protector are made of protector outer casing and inner protective circuit thereof, and this protective circuit comprises a step-down rectifying circuit F
1With A.C. contactor CJ, it is characterized in that this protective circuit also comprises a signal recognition circuit F
2, time-delay saltus step circuit F
3, overvoltage crowbar F
4And saltus step protection back voltage supply circuit F
5, wherein signal recognition circuit is by coil L
1With potentiometer W and connect the back with triode BG
1And relay J
1Be formed by connecting; Time-delay saltus step circuit is by resistance R
2, R
3, capacitor C
2, triode BG
2And relay J
2Be formed by connecting, and signal recognition circuit repeat circuit J
1Closing point and time-delay saltus step circuit in resistance R
2Connect; Overvoltage crowbar is by resistance R
4, triode BG
3And relay J
2Be formed by connecting; Saltus step protection back voltage supply circuit is by capacitor C
3, resistance R
5, R
6The normal contact that reaches A.C. contactor CJ is formed by connecting, and the triode BG in this normal contact and the time-delay saltus step circuit
2Base stage connects.
2, motor according to claim 1 and compressor protector is characterized in that at triode BG
1, BG
2And BG
3Base stage on the voltage stabilizing didoe DW that respectively connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01247530 CN2511029Y (en) | 2001-09-05 | 2001-09-05 | Electric motor and compressor protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01247530 CN2511029Y (en) | 2001-09-05 | 2001-09-05 | Electric motor and compressor protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2511029Y true CN2511029Y (en) | 2002-09-11 |
Family
ID=33658371
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01247530 Expired - Fee Related CN2511029Y (en) | 2001-09-05 | 2001-09-05 | Electric motor and compressor protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2511029Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8605393B2 (en) | 2008-02-20 | 2013-12-10 | Emerson Climate Technologies, Inc. | Compressor protection and grid fault detection device |
-
2001
- 2001-09-05 CN CN 01247530 patent/CN2511029Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8605393B2 (en) | 2008-02-20 | 2013-12-10 | Emerson Climate Technologies, Inc. | Compressor protection and grid fault detection device |
| CN101946185B (en) * | 2008-02-20 | 2014-03-26 | 艾默生环境优化技术有限公司 | Compressor protection and grid fault detection device |
| US9130370B2 (en) | 2008-02-20 | 2015-09-08 | Emerson Climate Technologies, Inc. | Compressor protection and grid fault detection device |
| US9472944B2 (en) | 2008-02-20 | 2016-10-18 | Emerson Climate Technologies, Inc. | Compressor protection and grid fault detection device |
| US9941688B2 (en) | 2008-02-20 | 2018-04-10 | Emerson Climate Technologies, Inc. | Compressor protection and grid fault detection device |
| US10418800B2 (en) | 2008-02-20 | 2019-09-17 | Emerson Climate Technologies, Inc. | Compressor protection and grid fault detection device |
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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 |