CN108649530A - A kind of threephase motor temperature control light current and forceful electric power isolation circuit - Google Patents
A kind of threephase motor temperature control light current and forceful electric power isolation circuit Download PDFInfo
- Publication number
- CN108649530A CN108649530A CN201810753943.XA CN201810753943A CN108649530A CN 108649530 A CN108649530 A CN 108649530A CN 201810753943 A CN201810753943 A CN 201810753943A CN 108649530 A CN108649530 A CN 108649530A
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- isolation circuit
- threephase motor
- insurance
- power
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- 238000002955 isolation Methods 0.000 title claims abstract description 32
- 230000005611 electricity Effects 0.000 claims abstract description 16
- 241000519996 Teucrium chamaedrys Species 0.000 claims abstract description 13
- 238000004804 winding Methods 0.000 claims description 10
- 238000005516 engineering process Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/50—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to the appearance of abnormal wave forms, e.g. ac in dc installations
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Protection Of Generators And Motors (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a kind of threephase motor temperature control light current and forceful electric power isolation circuit, including external 380V three-phase alternating-current supplies, threephase motor M and isolation circuit and operating circuit；The isolation circuit includes isolated DC power supply DCC, temperature-sensitive element PTC, midget relay KA and fast molten insurance FU1 and FU2；The operating circuit includes working dc power DC, stop button SB1, start button SB2, operation contactor KM, computer board IC, the normally opened contact IC1 of computer board IC and fast molten insurance FU3 and FU4.Technical scheme of the present invention has the characteristics that simple in structure, easy to operate, dexterously increases isolation light current, is suitable for extensive automatic control system, forceful electric power is avoided to scurry into work weak electricity system, has stronger practicability, economic and social benefit notable.
Description
Technical field
The present invention relates to a kind of control circuit, relates in particular to a kind of threephase motor temperature control light current and electricity is isolated with forceful electric power
Road.
Background technology
The temperature controller of motor is embedded in by PTC temperature control elements on the coil of threephase motor intercoil connection, general to use 80 DEG C
Ceramic PTC temperature-sensitive element, is then drawn by both threads, it is gone here and there in the vulnerabilities scan circuit of threephase motor, it is equivalent to
One normally-closed contact.Direct detection coil temperature, when threephase motor is because of phase shortage, load excessive makes winding overheat, more than 80 DEG C
When PTC element tripping, vulnerabilities scan circuit disconnect, play threephase motor protective effect.
But when threephase motor winding coil occurs seriously to burn out, the insulation between coil L and temperature control element PTC
It is breakdown.At this moment, AC380V can scurry into low-voltage direct DC circuits, and the electrical equipments such as the IC computer boards of DC loop is caused to damage,
Cause larger economic loss.
Therefore, a kind of threephase motor temperature control light current and forceful electric power isolation circuit are designed, there is larger economy and society's meaning
Justice.
Invention content
It is an object of the invention to design a kind of threephase motor temperature control light current and forceful electric power isolation circuit, the isolation circuit gram
The deficiencies in the prior art have been taken, it is simple in structure, it is easy to operate, it is reliable and stable, it avoids and occurs in threephase motor winding coil
Lead to the damage of computer board in light current circuit when seriously burning out, it is therefore prevented that forceful electric power scurries into low-voltage direct DC circuits, effective protection
The electrical equipment of operating circuit.
In order to achieve the above objectives, a kind of threephase motor temperature control light current of the present invention and forceful electric power isolation circuit include external 380V
Three-phase alternating-current supply, threephase motor M, breaker is serially connected between the 380V three-phase alternating-current supplies and threephase motor M
QF1；It is characterized in that：The motor temperature control light current and forceful electric power isolation circuit further include isolation circuit and operating circuit；It is described
Isolation circuit includes isolated DC power supply DCC, temperature-sensitive element PTC, midget relay KA and fast molten insurance FU1 and FU2；It is described
Operating circuit includes working dc power DC, stop button SB1, start button SB2, operation contactor KM, computer board IC, computer
The normally opened contact IC1 and insurance FU3 and FU4 of plate IC；Every phase power supply of the 380V three-phase alternating-current supplies connects through operation respectively
It is concatenated with the three-phase electricity source of threephase motor M after the main contacts KM1 of tentaculum KM；The external 5V of the isolated DC power supply DCC are straight
Galvanic electricity source, the external 12V DC power supplys of working dc power DC；The temperature-sensitive element PTC is arranged inside threephase motor M
Winding coil L on；
The positive line with fast molten insurance FU1, midget relay KA respectively of the 5V isolated DC power supplys DCC of the isolation circuit
It is grounded after the temperature-sensitive element PTC series connection enclose, being arranged inside threephase motor M；One end of the fast molten insurance FU2 is isolated with 5V
The cathode of DC power supply DCC is connected, other end ground connection；
The 12V working dc powers DC of the operating circuit anode respectively with insurance FU3, stop button SB1, start button
After SB2, the normally opened contact IC1 of computer board IC, the coil of operation contactor KM, insurance FU4 concatenations, with 12V working dc powers
The cathode of DC is connected；The normally opened contact KM2 of the operation contactor KM is in parallel with start button SB2；The one of the computer board IC
After end is concatenated with the normally opened contact KA1 of midget relay KA, it is connect with the anode of 12V working dc powers DC after insuring FU3,
The other end is connected with after insurance FU4 concatenations with the cathode of 12V working dc powers DC；The main contacts of the operation contactor KM
KM1 is serially connected between circuit breaker Q F1 and threephase motor M.
In the above-mentioned technical solutions, the present invention is provided with isolation circuit between forceful electric power and the electrical equipment of light current circuit,
When the winding coil L of threephase motor M occurs seriously to burn out, the insulation between winding coil L and temperature-sensitive element PTC is hit
It wears.At this moment, AC380V can scurry into isolation low-voltage direct isolation circuit and be grounded, and at this moment melt insurance FU1 or FU2 in isolation circuit soon
It can be instanteously blown.At this moment, the coil losing electricity release of midget relay KA, normally opened contact KA1 are opened, computer board IC dead electricity, IC
Output contact is opened, and the coil of operation contactor KM is in off-position, to ensure that the electrical equipments such as IC computer boards from
Damage, avoids larger economic loss.The present invention overcomes the deficiencies in the prior art, simple in structure, reliable and stable, avoid
Lead to the damage of computer board in light current circuit when threephase motor winding coil occurs seriously to burn out, it is therefore prevented that forceful electric power is scurried into
Low-voltage direct DC circuits, the effective protection electrical equipment of operating circuit.
Description of the drawings
Fig. 1 is a kind of circuit diagram of threephase motor temperature control light current and forceful electric power isolation circuit of the present invention.
Specific implementation mode
With reference to the accompanying drawings and examples to a kind of threephase motor temperature control light current of the present invention and forceful electric power isolation circuit make into
One step is described in detail.The attached drawing for constituting the application is used to provide further understanding of the present invention, schematic implementation of the invention
Example and its explanation are not constituted improper limitations of the present invention for explaining the present invention.
As seen from Figure 1, a kind of threephase motor temperature control light current of the present embodiment and forceful electric power isolation circuit, including external 380V
Three-phase alternating-current supply, threephase motor M, isolation circuit and operating circuit.In the present embodiment, 380V three-phase alternating-current supplies and three-phase
Circuit breaker Q F1 is serially connected between motor M.In the present embodiment, every phase power supply of 380V three-phase alternating-current supplies connects through operation respectively
It is concatenated with the three-phase electricity source of threephase motor M after the main contacts KM1 of tentaculum KM.
As seen from Figure 1, the isolation circuit of the present embodiment includes isolated DC power supply DCC, temperature-sensitive element PTC, miniature relay
Device KA and fast molten insurance FU1 and FU2.The external 5V DC power supplies of isolated DC power supply DCC of the present embodiment, the 5V of isolation circuit
The anode of isolated DC power supply DCC is respectively with fast molten insurance FU1, the coil of midget relay KA, setting in threephase motor M
It is grounded after the temperature-sensitive element PTC series connection in portion；One end of fast molten insurance FU2 is connected with the cathode of 5V isolated DC power supplys DCC, another
End ground connection.The temperature-sensitive element PTC of the present embodiment is arranged on the winding coil L inside threephase motor M.
As seen from Figure 1, the operating circuit of the present embodiment includes working dc power DC, stop button SB1, start button
SB2, operation contactor KM, computer board IC, the normally opened contact IC1 of computer board IC and insurance FU3 and FU4.The work of the present embodiment
Make the external 12V DC power supplys of DC power supply DC.In the present embodiment, the anode of the 12V working dc powers DC of operating circuit is respectively
With insurance FU3, stop button SB1, start button SB2, the normally opened contact IC1 of computer board IC, the coil of operation contactor KM, guarantor
After dangerous FU4 concatenations, it is connected with the cathode of 12V working dc powers DC.The normally opened contact KM2 and start button of operation contactor KM
SB2 is in parallel, after one end of computer board IC is concatenated with the normally opened contact KA1 of midget relay KA, works with 12V after insuring FU3
The anode connection of DC power supply DC, the other end are connected with after insurance FU4 concatenations with the cathode of 12V working dc powers DC.This reality
It applies in example, the main contacts KM1 of operation contactor KM is serially connected between circuit breaker Q F1 and threephase motor M.
In the present embodiment, when normal boot-strap, when circuit breaker Q F1 manual closings, working dc power DC connects 12V electricity
Source, isolated DC power supply DCC connect 5V power supplys.At this moment temperature-sensitive element PTC is in closed state, and the coil of midget relay KA obtains
Electricity is attracted, and normally opened contact KA1 is closed, and computer board IC obtains electric, the normally opened contact IC1 closures of computer board IC, operation contactor KM
It is in standby.
When pressing start button SB2, operation contactor KM obtain it is electric and by the main contacts KM1 self-lockings of operation contactor KM, three
The M operations of phase motor.When pressing stop button SB1, the coil losing electricity of operation contactor KM, threephase motor M is out of service.
In the present embodiment, when the winding coil L of threephase motor M occurs seriously to burn out, winding coil L and thermal element
Insulation between part PTC is breakdown.At this moment, AC380V can scurry into isolation circuit and be grounded, and at this moment isolation circuit melts insurance FU1 soon
Or FU2 can be instanteously blown.At this moment, the coil losing electricity release of midget relay KA, normally opened contact KA1 are opened, and computer board IC loses
The normally opened contact IC1 of electricity, computer board IC is opened, and operation contactor KM is in off-position.To ensure the electricity such as computer board IC
Gas equipment avoids larger economic loss from damage.
In the present embodiment, relay uses midget relay KA, can more be born by force than photoelectrical coupler and solid-state relay
The impact of electricity avoids the electrical equipments such as the computer board IC of weak current part from damage.
The present embodiment has the characteristics that simple in structure, easy to operate, dexterously increases isolation circuit, is suitable for extensive
Automatic control system avoids forceful electric power from scurrying into work weak electricity system, has higher practicability, economic and social benefit notable.
The above is only the embodiment of the present invention, is not imposed any restrictions to the present invention, every according to the technology of the present invention
Essence still falls within the technology of the present invention to any simple modification, change and the variation of equivalent method made by above example
In the protection domain of scheme.
Claims (1)
1. a kind of motor temperature control light current and forceful electric power isolation circuit, including external 380V three-phase alternating-current supplies, threephase motor M,
It is serially connected with circuit breaker Q F1 between the 380V three-phase alternating-current supplies and threephase motor M；It is characterized in that：The motor temperature
It further includes isolation circuit and operating circuit that light current, which is controlled, with forceful electric power isolation circuit；The isolation circuit include isolated DC power supply DCC,
Temperature-sensitive element PTC, midget relay KA and fast molten insurance FU1 and FU2；The operating circuit include working dc power DC,
Stop button SB1, start button SB2, operation contactor KM, computer board IC, the normally opened contact IC1 of computer board IC and insurance
FU3 and FU4；Every phase power supply of the 380V three-phase alternating-current supplies respectively after the main contacts KM1 of operation contactor KM with three-phase
The three-phase electricity source of motor M concatenates；The external 5V DC power supplies of isolated DC power supply DCC, the working dc power DC
External 12V DC power supply；The temperature-sensitive element PTC is arranged on the winding coil L inside threephase motor M；
The positive line with fast molten insurance FU1, midget relay KA respectively of the 5V isolated DC power supplys DCC of the isolation circuit
It is grounded after the temperature-sensitive element PTC series connection enclose, being arranged inside threephase motor M；One end of the fast molten insurance FU2 is isolated with 5V
The cathode of DC power supply DCC is connected, other end ground connection；
The 12V working dc powers DC of the operating circuit anode respectively with insurance FU3, stop button SB1, start button
After SB2, the normally opened contact IC1 of computer board IC, the coil of operation contactor KM, insurance FU4 concatenations, with 12V working dc powers
The cathode of DC is connected；The normally opened contact KM2 of the operation contactor KM is in parallel with start button SB2；The one of the computer board IC
After end is concatenated with the normally opened contact KA1 of midget relay KA, it is connect with the anode of 12V working dc powers DC after insuring FU3,
The other end is connected with after insurance FU4 concatenations with the cathode of 12V working dc powers DC；The main contacts of the operation contactor KM
KM1 is serially connected between circuit breaker Q F1 and threephase motor M.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810753943.XA CN108649530B (en) | 2018-07-11 | 2018-07-11 | Temperature control weak current and strong current isolation circuit of three-phase motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810753943.XA CN108649530B (en) | 2018-07-11 | 2018-07-11 | Temperature control weak current and strong current isolation circuit of three-phase motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108649530A true CN108649530A (en) | 2018-10-12 |
| CN108649530B CN108649530B (en) | 2024-04-09 |
Family
ID=63751522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810753943.XA Active CN108649530B (en) | 2018-07-11 | 2018-07-11 | Temperature control weak current and strong current isolation circuit of three-phase motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108649530B (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2015596C1 (en) * | 1991-07-02 | 1994-06-30 | Леонид Петрович Дмитренко | Electric motor protection device |
| CN2205076Y (en) * | 1993-03-09 | 1995-08-09 | 金大奎 | Universal solid three phase motor protector |
| CN2255690Y (en) * | 1996-01-12 | 1997-06-04 | 沈骊天 | Electric motor protector |
| CN2311889Y (en) * | 1996-10-18 | 1999-03-24 | *** | Controller for electric machine |
| CN2512147Y (en) * | 2001-10-30 | 2002-09-18 | 赵峰 | Electric motor starting protector for small air compressor |
| CN2857066Y (en) * | 2005-05-12 | 2007-01-10 | 岳阳华强电力电子有限公司 | Conversion air conditioning electrical system of bus |
| CN204441852U (en) * | 2015-02-05 | 2015-07-01 | 上海和宗焊接设备制造有限公司 | A kind of three-phase overvoltage, under-voltage, phase shortage integrated protective circuit |
| CN204732855U (en) * | 2015-07-22 | 2015-10-28 | 金陵科技学院 | A kind of motor over-temperature controller |
| CN205004732U (en) * | 2015-10-16 | 2016-01-27 | 介国安 | Contactless relay protection ware of intelligent motor power isolation |
| CN106340855A (en) * | 2016-05-22 | 2017-01-18 | 湖南吉利汽车部件有限公司 | Relay protection control device for motor |
| CN108120872A (en) * | 2017-12-27 | 2018-06-05 | 奥克斯空调股份有限公司 | A kind of protection system and method for three-phase electricity air-conditioner controller |
| CN208479171U (en) * | 2018-07-11 | 2019-02-05 | 安徽华茂纺织股份有限公司 | A kind of threephase motor temperature control light current and forceful electric power isolation circuit |
-
2018
- 2018-07-11 CN CN201810753943.XA patent/CN108649530B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2015596C1 (en) * | 1991-07-02 | 1994-06-30 | Леонид Петрович Дмитренко | Electric motor protection device |
| CN2205076Y (en) * | 1993-03-09 | 1995-08-09 | 金大奎 | Universal solid three phase motor protector |
| CN2255690Y (en) * | 1996-01-12 | 1997-06-04 | 沈骊天 | Electric motor protector |
| CN2311889Y (en) * | 1996-10-18 | 1999-03-24 | *** | Controller for electric machine |
| CN2512147Y (en) * | 2001-10-30 | 2002-09-18 | 赵峰 | Electric motor starting protector for small air compressor |
| CN2857066Y (en) * | 2005-05-12 | 2007-01-10 | 岳阳华强电力电子有限公司 | Conversion air conditioning electrical system of bus |
| CN204441852U (en) * | 2015-02-05 | 2015-07-01 | 上海和宗焊接设备制造有限公司 | A kind of three-phase overvoltage, under-voltage, phase shortage integrated protective circuit |
| CN204732855U (en) * | 2015-07-22 | 2015-10-28 | 金陵科技学院 | A kind of motor over-temperature controller |
| CN205004732U (en) * | 2015-10-16 | 2016-01-27 | 介国安 | Contactless relay protection ware of intelligent motor power isolation |
| CN106340855A (en) * | 2016-05-22 | 2017-01-18 | 湖南吉利汽车部件有限公司 | Relay protection control device for motor |
| CN108120872A (en) * | 2017-12-27 | 2018-06-05 | 奥克斯空调股份有限公司 | A kind of protection system and method for three-phase electricity air-conditioner controller |
| CN208479171U (en) * | 2018-07-11 | 2019-02-05 | 安徽华茂纺织股份有限公司 | A kind of threephase motor temperature control light current and forceful electric power isolation circuit |
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| Publication number | Publication date |
|---|---|
| CN108649530B (en) | 2024-04-09 |
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