CN205921369U - Overheated automatic protection circuit of motor - Google Patents
Overheated automatic protection circuit of motor Download PDFInfo
- Publication number
- CN205921369U CN205921369U CN201620950588.1U CN201620950588U CN205921369U CN 205921369 U CN205921369 U CN 205921369U CN 201620950588 U CN201620950588 U CN 201620950588U CN 205921369 U CN205921369 U CN 205921369U
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- tds
- relay
- detect switch
- temperature detect
- temperature
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- 238000013021 overheating Methods 0.000 claims description 11
- 230000007257 malfunction Effects 0.000 claims description 3
- 238000001816 cooling Methods 0.000 abstract 3
- 230000005611 electricity Effects 0.000 description 4
- 239000003054 catalyst Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000008450 motivation Effects 0.000 description 1
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- Protection Of Generators And Motors (AREA)
Abstract
The utility model provides an overheated automatic protection circuit of motor, including cooling device, ac contactor, first relay, second relay, first, second, the 3rd temperature detect switch, fuse, positive behind the fuse in proper order and connect ac contactor's coil, first, third, the 2nd temperature detect switch, the 2nd normally open contact of first relay, ac contactor's coil concatenates the normally -close node of second relay, the 3rd temperature detect switch concatenates the coil of second relay, a temperature detect switch concatenates a normally open contact of first relay and the coil of first relay, the 2nd normally open contact of first relay concatenates cooling device, the 2nd temperature detect switch connects in parallel at the normally open contact both ends of a temperature detect switch with first relay, the normally closed contact of second relay and the coil of coil, first relay, cooling device connect in parallel. The utility model discloses can prolong the life -span and the operating time of motor.
Description
Technical field
This utility model is related to a kind of motor protection against overheat circuit, belongs to circuit protection technical field.
Background technology
During persistently using, its stator and rotor do not stop to rub motor, are susceptible to superheating phenomenon, if not
Can take measures in time to suppress motor temperature persistently to raise, then when overheat condition is gradually aggravated, motor may be burnt
Coil, lead to motor badly damaged or even scrap, bring inconvenience to business unit and maintainer；Now electronic
The operation principle of machine overtemperature protection system is generally: the temperature of motor is detected, reach after setting value to temperature, can at once or
The control circuit of motor is cut off in person's time delay for a period of time afterwards, makes motor stall, is radiated, thus avoiding electronic
Machine coil is burned, and reaches the purpose of protection motor；But it is electronic when the equipment of motor-driven runs to crucial moment
There is superheating phenomenon in machine, although now automatically cutting off power supply can protect motor, the operation to equipment has been also carried out interrupting,
Larger loss may be caused to enterprise；If additionally, motor protection against overheat device breaks down it is impossible to timely or thorough
Bottom ground cut-out motor power so that motor continuous firing and temperature constantly raises, then motor still can be damaged.
Utility model content
This utility model is bright to overcome the shortcomings of that prior art exists, and technical problem to be solved is: provides one kind cutting
First motor is lowered the temperature before disconnected motor power, to extend the motor protection against overheat device of its working time.
In order to solve above-mentioned technical problem, the technical solution adopted in the utility model is: a kind of motor overheating is protected automatically
Protection circuit it is characterised in that: include chiller, A.C. contactor, the first relay, the second relay, the first temperature detect switch (TDS),
Second temperature detect switch (TDS), the 3rd temperature detect switch (TDS), fuse；One end of described fuse is connected with positive source, and the other end is successively simultaneously
Meet one end of the coil of described A.C. contactor, one end of described first temperature detect switch (TDS), one end of described 3rd temperature detect switch (TDS), institute
State one end of the second temperature detect switch (TDS), one end of the second normally opened contact of described first relay；The coil of described A.C. contactor
The other end be connected with one end of the normally closed node of described second relay；The other end of described 3rd temperature detect switch (TDS) and described the
One end of the coil of two relays is connected；The other end of described first temperature detect switch (TDS) is normally opened with the first of described first relay to be touched
One end of point is connected, the other end of the other end of normally opened contact of described first relay and described second temperature detect switch (TDS) after connecing
It is connected with one end of the coil of described first relay；The other end of the second normally opened node of described first relay is cold with described
But device is connected；The other end of the normally closed node of described second relay, the other end of the coil of described second relay, described
The other end of the coil of the first relay, the other end of described chiller is connected connect after successively and with power cathode；Described
One temperature detect switch (TDS), the second temperature detect switch (TDS), the 3rd temperature detect switch (TDS) is temperature controlled normal open switch, the temperature of its control end and motor
Degree is associated.
The main contacts of described A.C. contactor is arranged in the major loop of motor.
A kind of described motor overheating automatic protection circuit, also includes activate switch, described activate switch is connected on institute
State in the branch road that the normally opened node of the second relay and described A.C. contactor are located.
A kind of described motor overheating automatic protection circuit, also includes shutdown switch, one end of described shutdown switch with
The other end of described fuse is connected, and the other end of described shutdown switch is sequentially connected the one of the coil of described A.C. contactor
End, one end of described first temperature detect switch (TDS), one end of described 3rd temperature detect switch (TDS), one end of described second temperature detect switch (TDS).
A kind of described motor overheating automatic protection circuit, also includes malfunction indicator lamp, and described malfunction indicator lamp is in parallel
Coil two ends in described second relay.
Described first temperature detect switch (TDS), the second temperature detect switch (TDS), the closed temperature of the 3rd temperature detect switch (TDS) setting is p > m > n, wherein n
For the closed temperature of the first temperature detect switch (TDS), m is the closed temperature of the second temperature detect switch (TDS), and p is the closed temperature of the 3rd temperature detect switch (TDS).
This utility model compared with prior art has the advantages that (1) reaches uniform temperature when motor temperature
When, motor can be cooled automatically, without disconnect motor, thus extend motor use time and
Life-span.(2), when dropping to a certain degree at a temperature of motor, automatically can disconnect chiller again, thus save energy.
(3) when protection circuit breaks down, and when the temperature of motor is too high, can automatically disconnect motor, and point out operator
Member's maintenance, improves the safety of motor running.
Brief description
Fig. 1 is a kind of circuit diagram of motor protection against overheat circuit of the present utility model；
Fig. 2 is the circuit diagram of motor main circuit.
Specific embodiment
In order to understand content of the invention of the present utility model in depth, below in conjunction with the accompanying drawings with specific embodiment to this utility model
It is described further.
As shown in figure 1, the utility model proposes a kind of motor protection against overheat circuit, including chiller m1, exchanging
Catalyst km, the first relay ka1, the second relay ka2, the first temperature detect switch (TDS) k1, the second temperature detect switch (TDS) k2, the 3rd temperature control is opened
Close k3, fuse fu1.
One end positive source of fuse fu1 is connected, and the other end of fuse fu1 successively and connects the line of A.C. contactor km
One end of circle qm, one end of the first temperature detect switch (TDS) k1, one end of the second temperature detect switch (TDS) k2, one end of the 3rd temperature detect switch (TDS) k3, the
One end of the normally opened contact ka1.3 of one relay ka1 connects；The other end of coil qm of A.C. contactor km and the second relay
One end of the normally closed node ka2.2 of ka2 is connected；The other end of the 3rd temperature detect switch (TDS) k3 and the coil ka2.1 of the second relay ka2
One end be connected；The other end of the first temperature detect switch (TDS) k1 is connected with one end of the normally opened node ka1.2 of the first relay ka1, the
The other end of normally opened node ka1.1 of one relay ka1 be connected with the other end of the second temperature detect switch (TDS) k2 after with the first relay
One end of the coil ka1.1 of ka1 is connected；The other end of normally opened contact ka1.3 of the first relay ka1 and the one of chiller m1
End is connected；The other end of the normally closed node ka2.2 of the second relay, the other end of the coil ka2.1 of the second relay ka2, the
The other end of the coil ka1.1 of one relay ka1, the other end of chiller m2 is connected connect after successively and with power cathode.
Wherein, it is illustrated in figure 2 the major loop of motor.In the major loop of motor, three-phase alternating current is through fuse
The main contacts km1 of fu, A.C. contactor km, and after thermorelay fr, be transported in motor m.
As shown in figure 1, motor protection against overheat circuit of the present utility model also includes activate switch qa and shutdown switch ta,
Activate switch qa is connected in the branch road that the normally opened node of described second relay and described A.C. contactor are located；Shutdown switch
One end of ta is connected with the other end of fuse fu1, and the other end of shutdown switch ta is sequentially connected the coil qm of A.C. contactor
One end, one end of the first temperature detect switch (TDS) k1, one end of the 3rd temperature detect switch (TDS) k2, one end of described second temperature detect switch (TDS).
As shown in figure 1, motor protection against overheat circuit of the present utility model also includes warning warning lamp l, this warning warns
Lamp l is connected in parallel on the two ends of the coil ka2.1 of the second relay ka2.
Wherein, the first temperature detect switch (TDS) k1, the second temperature detect switch (TDS) k2, the 3rd temperature detect switch (TDS) k3 are temperature controlled normally opened open
Close, when the temperature of control end is more than design temperature, it closes.Their control end is related to the temperature of described motor
Connection, its closed temperature is respectively set to n, m, p, wherein p > m > n.
When pressing start button qa, A.C. contactor km self-locking be energized, its coil qm obtain electric, A.C. contactor km's
Normally opened contact km1 adhesive, the main circuit energising of motor m runs；When pressing stop button ta, the line of A.C. contactor km
Circle qm power failure tripping, its normally opened contact km1 disconnects, and main circuit power-off is out of service.
During electric motor operation, its stator and rotor do not stop to rub, and are susceptible to superheating phenomenon, when motor temperature rises to
During value n, the first temperature detect switch (TDS) k1 closure, but because the first relay coil can not obtain electric, chiller m1 does not work, and works as temperature
When degree continuously rises to m, the second temperature detect switch (TDS) k2 closure, then the coil ka1.1 of the first relay ka1 obtains electric, the first relay
The normally opened contact ka1.2 and ka1.3 closure of ka1, the chiller m1 connecting with the normally opened contact ka1.3 of the first relay ka1
Energising operating, lowers the temperature to motor m.
When motor temperature is less than m, the first temperature detect switch (TDS) k1 still closes, and the second temperature detect switch (TDS) k2 disconnects, but due to the
One relay ka1 is in self-locking state, and its coil ka1.1 continues electric, and its normally opened contact ka1.2 and ka1.3 still closes, cold
But device m1 continues motor m is lowered the temperature；When motor temperature drops to less than n, the first temperature detect switch (TDS) k1 and second
Temperature detect switch (TDS) k2 disconnects, the coil ka1.1 dead electricity of the first relay ka1, and its normally opened contact ka1.2 and ka1.3 all disconnects, then
Chiller dead electricity is out of service.
When temperature goes up not down, reach p(p > m > n) when, illustrate that protection circuit breaks down, now, the 3rd temperature detect switch (TDS)
K3 closes, and the coil ka2.1 of the second relay ka2 obtains electric, and simultaneous faults display lamp l is lit display fault.Second relay
The normally-closed contact ka2.2 of ka2 disconnects, and makes the coil qm dead electricity of A.C. contactor km, and the normally opened contact km1 of catalyst disconnects, electricity
Motivation m quits work.
Motor protection against overheat circuit of the present utility model not only can the motor too high to temperature be cooled down automatically,
Extend life-span and the working time of motor.When dropping to a certain degree at a temperature of motor, can automatically disconnect cold again
But device, thus save energy.And, when protection circuit breaks down, and when the temperature of motor is too high, can be from dynamic circuit breaker
Drive motor, and point out operator to keep in repair, improve the safety of motor running.
Above in conjunction with accompanying drawing, embodiment of the present utility model is explained in detail, but this utility model is not limited to
State embodiment, in the ken that those of ordinary skill in the art possess, can also be without departing from this utility model objective
On the premise of various changes can be made.
Claims (6)
1. a kind of motor overheating automatic protection circuit it is characterised in that: include chiller, A.C. contactor, the first relay
Device, the second relay, the first temperature detect switch (TDS), the second temperature detect switch (TDS), the 3rd temperature detect switch (TDS), fuse；One end of described fuse
Be connected with positive source, the other end successively and connect described A.C. contactor coil one end, the one of described first temperature detect switch (TDS)
End, one end of described 3rd temperature detect switch (TDS), one end of described second temperature detect switch (TDS), the second normally opened contact of described first relay
One end；The other end of the coil of described A.C. contactor is connected with one end of the normally closed node of described second relay；Described
The other end of the 3rd temperature detect switch (TDS) is connected with one end of the coil of described second relay；The other end of described first temperature detect switch (TDS)
It is connected with one end of the first normally opened contact of described first relay, the other end of normally opened contact of described first relay and institute
It is connected with one end of the coil of described first relay after stating the other end of the second temperature detect switch (TDS) and connecing；Described first relay
The other end of the second normally opened node is connected with described chiller；The other end of the normally closed node of described second relay, described
The other end of the coil of the second relay, the other end of the coil of described first relay, the other end of described chiller according to
Secondary and be connected with power cathode after connecing；Described first temperature detect switch (TDS), the second temperature detect switch (TDS), the 3rd temperature detect switch (TDS) is temperature controlled
Normal open switch, its control end is associated with the temperature of motor.
2. a kind of motor overheating automatic protection circuit according to claim 1 it is characterised in that: described A.C. contactor
Main contacts arrange motor major loop in.
3. a kind of motor overheating automatic protection circuit according to claim 1 it is characterised in that: also include startup and open
Close, described activate switch is connected in the branch road that the normally opened node of described second relay and described A.C. contactor are located.
4. a kind of motor overheating automatic protection circuit according to claim 1 it is characterised in that: also include stopping and open
Close, one end of described shutdown switch is connected with the other end of described fuse, and the other end of described shutdown switch is sequentially connected institute
State one end of the coil of A.C. contactor, one end of described first temperature detect switch (TDS), one end of described 3rd temperature detect switch (TDS), described
One end of two temperature detect switch (TDS)s.
5. a kind of motor overheating automatic protection circuit according to claim 1 it is characterised in that: also include indicating fault
Lamp, described malfunction indicator lamp is connected in parallel on the coil two ends of described second relay.
6. a kind of motor overheating automatic protection circuit according to claim 1 it is characterised in that: described first temperature control is opened
Close, the second temperature detect switch (TDS), the closed temperature of the 3rd temperature detect switch (TDS) setting is p > m > n, and wherein n is the closure temperature of the first temperature detect switch (TDS)
Degree, m is the closed temperature of the second temperature detect switch (TDS), and p is the closed temperature of the 3rd temperature detect switch (TDS).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620950588.1U CN205921369U (en) | 2016-08-27 | 2016-08-27 | Overheated automatic protection circuit of motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620950588.1U CN205921369U (en) | 2016-08-27 | 2016-08-27 | Overheated automatic protection circuit of motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205921369U true CN205921369U (en) | 2017-02-01 |
Family
ID=57868506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620950588.1U Active CN205921369U (en) | 2016-08-27 | 2016-08-27 | Overheated automatic protection circuit of motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205921369U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107732874A (en) * | 2017-11-18 | 2018-02-23 | 襄垣县树元电器有限公司 | Energy saving motor rectification overheats delay protection device |
| CN107769166A (en) * | 2017-11-18 | 2018-03-06 | 襄垣县树元电器有限公司 | Energy saving motor rectification overheats delay protection self-lock device |
| CN114496648A (en) * | 2022-02-10 | 2022-05-13 | 上海康恒环境股份有限公司 | Electrical control protection device |
-
2016
- 2016-08-27 CN CN201620950588.1U patent/CN205921369U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107732874A (en) * | 2017-11-18 | 2018-02-23 | 襄垣县树元电器有限公司 | Energy saving motor rectification overheats delay protection device |
| CN107769166A (en) * | 2017-11-18 | 2018-03-06 | 襄垣县树元电器有限公司 | Energy saving motor rectification overheats delay protection self-lock device |
| CN114496648A (en) * | 2022-02-10 | 2022-05-13 | 上海康恒环境股份有限公司 | Electrical control protection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |