CN203367999U - Motor temperature protection device - Google Patents
Motor temperature protection device Download PDFInfo
- Publication number
- CN203367999U CN203367999U CN 201320419631 CN201320419631U CN203367999U CN 203367999 U CN203367999 U CN 203367999U CN 201320419631 CN201320419631 CN 201320419631 CN 201320419631 U CN201320419631 U CN 201320419631U CN 203367999 U CN203367999 U CN 203367999U
- Authority
- CN
- China
- Prior art keywords
- phase
- tds
- detect switch
- temperature detect
- normally
- 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 - Lifetime
Links
- 230000001012 protector Effects 0.000 claims description 10
- 238000012544 monitoring process Methods 0.000 abstract 1
- 230000001681 protective effect Effects 0.000 description 5
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000037452 priming Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
Images
Abstract
The utility model relates to a motor protection device, and specifically relates to a motor temperature protection device. The motor temperature protection device is characterized in that a fuse 1RD, a start button SA, a stop button SB, a normally-closed contact ZK2 of a relay ZK, a relay KM, a normally-closed contact KSD1-1 of a temperature control switch KSD1, a normally-closed contact KSD2-1 of a temperature control switch KSD2, a normally-closed contact KSD3-1 of a temperature control switch KSD3 and a fuse 2RD are serially connected successively between the U phase and the W phase of a three-phase power source, wherein the start button SA is connected in parallel with a normally open contact KM2 of the relay KM; and a shunt trip coil QA and a normally open temperature control switch KSD4 are serially connected successively between the U phase and the W phase of the three-phase power source, wherein the normally open temperature control switch KSD4 is connected in parallel with a normally open temperature control switch KSD5, and connected in parallel with a normally open temperature control switch KSD6, etc. The motor temperature protection device of the utility model can be used to perform comprehensive and high-sensitivity real-time monitoring on the temperature of each stator coil of a three-phase motor, and when the temperature of any stator coil reaches a preset temperature, the power source will be controlled so as to stop supplying power to the three-phase motor to protect the three-phase motor.
Description
Technical field
The utility model relates to a kind of electric motor protective device, is specifically related to a kind of motor temperature protector.
Background technology
While continuing operation in the situations such as overload, phase shortage, blocking when motor, the insulation of coil of stator of motor is easy to damage, thereby various temperature protective devices occurred.
Now the temperature protective device of motor is various on the market, and pluses and minuses are respectively arranged, and roughly is divided into: 1, and insufficient sensitivity, the protection temperature is non-constant, and perhaps temperature does not still play a protective role higher than safety line yet; 2, apparatus structure complexity, high cost.And, along with aluminium core motor is universal cheaply, because copper core is larger than the ampacity of the aluminum core line of same model, under identical service condition, the stator coil of aluminium core motor more capacity damages.
The utility model content
The purpose of this utility model is to provide a kind of motor temperature protector, has solved the temperature protective device insufficient sensitivity of current three phase electric machine, and the problem of structure too complex high cost.
For solving above-mentioned technical problem, the utility model by the following technical solutions: a kind of motor temperature protector comprises:
Be serially connected with successively normally-closed contact ZK2, the relay K M of fuse 1RD, start button SA, stop button SB, relay ZK, normally closed temperature detect switch (TDS) KSD1, normally closed temperature detect switch (TDS) KSD2, normally closed temperature detect switch (TDS) KSD3 and fuse 2RD between the U of three phase mains phase and W phase, wherein said start button SA is parallel with the normally opened contact KM2 of relay K M;
Be serially connected with successively shunt opening breaking coil QA and Chang Kai temperature detect switch (TDS) KSD4 at the U of three phase mains phase and W between mutually, the described temperature detect switch (TDS) KSD4 that often opens is parallel with and often opens temperature detect switch (TDS) KSD5, is parallel with and often opens temperature detect switch (TDS) KSD6;
Described normally closed temperature detect switch (TDS) KSD1 and Chang Kai temperature detect switch (TDS) KSD4 are installed on the U phase stator coil of three phase electric machine, described normally closed temperature detect switch (TDS) KSD2 and Chang Kai temperature detect switch (TDS) KSD5 are installed on the V phase stator coil of three phase electric machine, and described normally closed temperature detect switch (TDS) KSD3 and Chang Kai temperature detect switch (TDS) KSD6 are installed on three phase electric machine W phase stator coil;
There is the normally opened contact KM1 of relay K M to be arranged on the power line of three phase electric machine, be connected in series with the normally-closed contact QA1 with the shunt opening breaking coil.
Further technical scheme is, the normally opened contact KM3 serial connection be provided with between the U phase of described three phase mains and W phase by relay K M starts the startup prompting branch road that warning light HD forms; The U phase of three phase mains and W are provided with that normally-closed contact KM4 serial connection by relay K M stops that warning light LD forms between mutually stops pointing out branch road.
Compared with prior art; the beneficial effects of the utility model are: can comprehensive, highly sensitive each stator coil temperature to three phase electric machine monitor in real time; when any one stator coil reaches predetermined temperature; can control power supply stops, to the three phase electric machine power supply, playing the effect of protection three phase electric machine.
The accompanying drawing explanation
Fig. 1 is circuit connection diagram of the present utility model.
Fig. 2 is the installation site schematic diagram of temperature detect switch (TDS) of the present utility model in three phase electric machine.
Fig. 3 is motor circuit connection layout of the present utility model.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
Fig. 1, Fig. 2 and Fig. 3 show an embodiment of a kind of motor temperature protector of the utility model: a kind of motor temperature protector comprises:
As shown in Figure 1, be serially connected with successively normally-closed contact ZK2, the relay K M of fuse 1RD, start button SA, stop button SB, relay ZK, normally closed temperature detect switch (TDS) KSD1, normally closed temperature detect switch (TDS) KSD2, normally closed temperature detect switch (TDS) KSD3 and fuse 2RD between the U of three phase mains phase and W phase, wherein said start button SA is parallel with the normally opened contact KM2 of relay K M;
Be serially connected with successively shunt opening breaking coil QA and Chang Kai temperature detect switch (TDS) KSD4 at the U of three phase mains phase and W between mutually, the described temperature detect switch (TDS) KSD4 that often opens is parallel with and often opens temperature detect switch (TDS) KSD5, is parallel with and often opens temperature detect switch (TDS) KSD6;
As shown in Figure 2, described normally closed temperature detect switch (TDS) KSD1 and Chang Kai temperature detect switch (TDS) KSD4 are installed on the U phase stator coil of three phase electric machine, described normally closed temperature detect switch (TDS) KSD2 and Chang Kai temperature detect switch (TDS) KSD5 are installed on the V phase stator coil of three phase electric machine, and described normally closed temperature detect switch (TDS) KSD3 and Chang Kai temperature detect switch (TDS) KSD6 are installed on three phase electric machine W phase stator coil;
As shown in Figure 3, there is the normally opened contact KM1 of relay K M to be arranged on the power line of three phase electric machine, be connected in series with the normally-closed contact QA1 with the shunt opening breaking coil.
Fig. 1 also shows another embodiment of a kind of motor temperature protector of the utility model, and the normally opened contact KM3 serial connection be provided with between the U phase of described three phase mains and W phase by relay K M starts the startup prompting branch road that warning light HD forms; The U phase of three phase mains and W are provided with that normally-closed contact KM4 serial connection by relay K M stops that warning light LD forms between mutually stops pointing out branch road.
According to another embodiment of a kind of motor temperature protector of the utility model, the normally opened contact KM3 serial connection be provided with between the U phase of described three phase mains and W phase by relay K M starts the startup prompting branch road that warning light HD forms; The U phase of three phase mains and W are provided with that normally-closed contact KM4 serial connection by relay K M stops that warning light LD forms between mutually stops pointing out branch road.
Operation principle of the present utility model is: any one in the normally closed temperature detect switch (TDS) KSD1 in three phase electric machine, normally closed temperature detect switch (TDS) KSD2 and normally closed temperature detect switch (TDS) KSD3 disconnects because corresponding stator coil excess Temperature triggers its normally-closed contact, relay K M will cut off the power supply, normally opened contact KM1 disconnects, and causes three phase electric machine M to stop operating;
In three phase electric machine often open temperature detect switch (TDS) KSD4, often open in temperature detect switch (TDS) KSD5 and Chang Kai temperature detect switch (TDS) KSD6 any one because corresponding stator coil excess Temperature triggers its normally opened contact, connect, relay QA energising, normally-closed contact QA1 disconnects, and causes three phase electric machine M to stop operating;
When running well, relay K M obtains electric, causes normally opened contact KM3 to connect, and starts warning light HD and lights, and normally-closed contact KM4 disconnects, and stops warning light LD and extinguishes, and means that one-way motors operates, otherwise in like manner.
In the utility model, normally closed temperature detect switch (TDS) KSD1, normally closed temperature detect switch (TDS) KSD2, normally closed temperature detect switch (TDS) KSD3, often open temperature detect switch (TDS) KSD4, often opening temperature detect switch (TDS) KSD5 and Chang Kai temperature detect switch (TDS) KSD6 should be identical when selecting temperature control point.Can avoid when cause the protection loop due to phase shortage is not protection loop V phase time; after will existing the protection loop to disconnect; after temperature drops to uniform temperature; the protection loop works on because of air pressure or the oil pressure deficiency in work loop; but, because of phase shortage repeated priming fault loop, can't excise major loop QA power supply.
The normally-closed contact QA1 of shunt opening breaking coil can be also release, and the release mode is +3340, when occurring that temperature raises as the backup protection of open-phase fault.Directly the tripping sky is opened, the excision trouble power.Avoid the motor repeated priming.
Claims (2)
1. a motor temperature protector is characterized in that: comprising:
Be serially connected with successively fuse 1RD, start button SA, stop button SB, relay K M, normally closed temperature detect switch (TDS) KSD1, normally closed temperature detect switch (TDS) KSD2, normally closed temperature detect switch (TDS) KSD3 and fuse 2RD between the U of three phase mains phase and W phase, wherein said start button SA is parallel with the normally opened contact KM2 of relay K M;
Be serially connected with successively shunt opening breaking coil QA and Chang Kai temperature detect switch (TDS) KSD at the U of three phase mains phase and W between mutually, the described temperature detect switch (TDS) KSD4 that often opens is parallel with and often opens temperature detect switch (TDS) KSD5, is parallel with and often opens temperature detect switch (TDS) KSD6;
Described normally closed temperature detect switch (TDS) KSD1 and Chang Kai temperature detect switch (TDS) KSD4 are installed on the U phase stator coil of three phase electric machine, described normally closed temperature detect switch (TDS) KSD2 and Chang Kai temperature detect switch (TDS) KSD5 are installed on the V phase stator coil of three phase electric machine, and described normally closed temperature detect switch (TDS) KSD3 and Chang Kai temperature detect switch (TDS) KSD6 are installed on three phase electric machine W phase stator coil;
There is the normally opened contact KM1 of relay K M to be arranged on the power line of three phase electric machine, be connected in series with the normally-closed contact QA1 with the shunt opening breaking coil.
2. a kind of motor temperature protector according to claim 1 is characterized in that: the normally opened contact KM3 serial connection that the U phase of described three phase mains and W are provided with by relay K M between mutually starts the startup prompting branch road that warning light HD forms; The U phase of three phase mains and W are provided with that normally-closed contact KM4 serial connection by relay K M stops that warning light LD forms between mutually stops pointing out branch road.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320419631 CN203367999U (en) | 2013-07-15 | 2013-07-15 | Motor temperature protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320419631 CN203367999U (en) | 2013-07-15 | 2013-07-15 | Motor temperature protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203367999U true CN203367999U (en) | 2013-12-25 |
Family
ID=49815718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320419631 Expired - Lifetime CN203367999U (en) | 2013-07-15 | 2013-07-15 | Motor temperature protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203367999U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103427398A (en) * | 2013-07-15 | 2013-12-04 | 国家电网公司 | Motor temperature protecting device |
-
2013
- 2013-07-15 CN CN 201320419631 patent/CN203367999U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103427398A (en) * | 2013-07-15 | 2013-12-04 | 国家电网公司 | Motor temperature protecting device |
| CN103427398B (en) * | 2013-07-15 | 2015-12-23 | 国家电网公司 | A kind of motor temperature protector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20131225 Effective date of abandoning: 20151223 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20131225 Effective date of abandoning: 20151223 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |