CN203233141U - Independent cooling fan interlocking protection device of variable-frequency motor - Google Patents
Independent cooling fan interlocking protection device of variable-frequency motor Download PDFInfo
- Publication number
- CN203233141U CN203233141U CN 201320112129 CN201320112129U CN203233141U CN 203233141 U CN203233141 U CN 203233141U CN 201320112129 CN201320112129 CN 201320112129 CN 201320112129 U CN201320112129 U CN 201320112129U CN 203233141 U CN203233141 U CN 203233141U
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- contactor
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- fan
- motor
- normally opened
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- Control Of Ac Motors In General (AREA)
- Stopping Of Electric Motors (AREA)
Abstract
An independent cooling fan interlocking protection device of a variable-frequency motor belongs to the technical field of electrical appliances. One end of the control switch is connected with one end of a normal-open contact of a new added relay KA, the other end of the normal-open contact of the new added relay KA is connected with one end of a stop button, the other end of the stop button is connected with a fault output end of a frequency converter, one end of the starting button is connected with a first coil of a main motor contactor KM1, one end of a normal-open contact of a fan contactor KM2 is connected with a second coil of the fan contactor KM2, one end of a third coil of the new added relay is connected with a line of a fan switch, each of three lines at one end of the fan switch is connected with one end of each of normal-open contacts of the fan contactor KM2, the other ends of the normal-open contacts of the fan contactor KM2 are connected with a motor of a cooling fan, and one end of each normal-open contact of the main motor contactor KM1 is connected with a main motor. According to the utility model, the main motor can be stopped in an interlocking manner when a fault occurs in a cooling fan motor device or a circuit.
Description
Technical field
The utility model relates to a kind of adjustable frequency motor independence cooling fan interlock protection device, belongs to technical field of electric appliances.
Background technology
The employed adjustable frequency motor of industrial enterprise has adopted the cooling fan of non-coaxial connection at present, and cooling fan motor has independent current source control.
Main existing problems: adjustable frequency motor adopts independent cooling fan, and main motor and cooling fan motor are controlled respectively by double circuit.When cooling fan motor equipment or circuit broke down, cooling fan motor was out of service, and main motor still continues operation, finally caused main motor to cool off and burnt.
Summary of the invention
Break down when shutting down at the cooling fan motor of the non-coaxial connection of present adjustable frequency motor, can't stop to protect the problem of main motor automatically, the utility model provides a kind of adjustable frequency motor independence cooling fan interlock protection device.
The technical scheme that its technical problem that solves the utility model adopts is:
A kind of adjustable frequency motor independence cooling fan interlock protection device, three lines of master switch connect frequency converter and fan switch; Article three, the wherein single line of line connects control switch;
The other end of control switch connects the normally opened contact that newly adds relay K A;
The normally opened contact other end that newly adds relay K A connects stop button;
The other end of stop button connects frequency converter failure output;
The other end of frequency converter failure output connects the normally opened contact of start button and blower fan contactor KM2;
The other end of start button connects first coil of main motor contactor KM1;
The normally opened contact other end of blower fan contactor KM2 connects second coil of blower fan contactor KM2;
First coil is connected the back and is connected with the tertiary coil of the coil KA that newly adds relay with second coil;
The other end that newly adds the tertiary coil of relay connects a circuit of fan switch;
The other end three-line of fan switch connects the normally opened contact of blower fan contactor KM2;
The other end of the normally opened contact of blower fan contactor KM2 connects the cooling blower motor;
The other end three-line of frequency converter connects the normally opened contact of main motor contactor KM1; The other end of the normally opened contact of main motor contactor KM1 connects main motor.
Effect of the present utility model is: through overtesting and operation, when cooling fan motor equipment or circuit go wrong, can chainly stop main motor, play the purpose of protecting main motor.
Description of drawings
When considered in conjunction with the accompanying drawings, by the reference following detailed, can more completely understand the utility model better and learn wherein many attendant advantages easily, but accompanying drawing described herein is used to provide further understanding of the present utility model, constitute a part of the present utility model, illustrative examples of the present utility model and explanation thereof are used for explaining the utility model, do not constitute improper restriction of the present utility model, as figure wherein:
Fig. 1 is variable-frequency motor circuit connection diagram of the present utility model.
Below in conjunction with drawings and Examples the utility model is further specified.
Embodiment
A kind of adjustable frequency motor independence cooling fan interlock protection device, three lines of master switch QF1 connect frequency converter 3 and fan switch (pyromagnetic protection switch) QF2; Article three, the wherein single line of line connects control switch QF3;
The other end of control switch QF3 connects the normally opened contact KA-2 that newly adds relay K A;
The normally opened contact KA-2 other end that newly adds relay K A connects stop button ST;
The other end of stop button ST connects frequency converter failure output BP;
The other end of frequency converter failure output BP connects the normally opened contact KM2-2 of start button SQ and blower fan contactor KM2;
The other end of start button SQ connects the first coil KM1-1 of main motor contactor KM1;
The normally opened contact KM2-2 other end of blower fan contactor KM2 connects the second coil KM2-1 of blower fan contactor KM2;
The second coil KM2-1 is connected the back and is connected with the tertiary coil KA-1 of the coil KA that newly adds relay with the first coil KM1-1;
The other end that newly adds the tertiary coil KA-1 of relay connects the circuit of fan switch (pyromagnetic protection switch) QF2;
The other end three-line of fan switch (pyromagnetic protection switch) QF2 connects the normally opened contact KM2-12 of blower fan contactor KM2;
The other end of the normally opened contact KM2-12 of blower fan contactor KM2 connects cooling blower motor 2;
The other end three-line of frequency converter 3 connects the normally opened contact KM1-2 of main motor contactor KM1; The other end of the normally opened contact KM1-2 of main motor contactor KM1 connects main motor 1.
Main motor contactor KM1 break-make is controlled the start and stop of main motor 1, the start and stop of blower fan contactor KM2 break-make control cooling blower motor 2, and fan switch QF2 is the overcurrent protection switch of cooling blower motor 2.
After master switch QF1, fan switch QF2, control switch QF3 closure, press start button SQ, the coil of main motor contactor KM1, blower fan contactor KM2 gets electric iron core adhesive, the main contacts closure of main motor 1 contactor KM1, blower fan contactor KM2, main motor 1 and 2 runnings of cooling blower motor, the control circuit self-locking has also been finished in the normally opened contact adhesive of blower fan contactor KM2 simultaneously.After pressing start button ST, the control circuit outage, in like manner main motor 1 and cooling blower motor 2 stop.
One newly adds relay K A, inserts the coil newly add relay K A in the circuitry phase of the three-phase line behind the pyromagnetic protection switch of cooling blower motor, inserts the normally opened contact KA-2 that newly adds relay K A between the control switch of control circuit and stop button.Frequency conversion master motor start and stop function is constant, when cooling blower motor 2 faults, fan switch QF2 disconnects, the tertiary coil KA-1 dead electricity that newly adds relay K A, the normally opened contact KA-2 that newly adds relay K A in the control circuit disconnects, so just disconnected the control circuit of main motor 1 and cooling blower motor 2, main motor 1 and cooling blower motor 2 stop.
As mentioned above, embodiment of the present utility model is explained, but as long as not breaking away from inventive point of the present utility model and effect in fact can have a lot of distortion, this will be readily apparent to persons skilled in the art.Therefore, such variation also all is included within the protection range of the present utility model.
Claims (1)
1. adjustable frequency motor independence cooling fan interlock protection device is characterized in that: three lines of master switch connect frequency converter and fan switch; Article three, the wherein single line of line connects control switch;
The other end of control switch connects the normally opened contact that newly adds relay K A;
The normally opened contact other end that newly adds relay K A connects stop button;
The other end of stop button connects frequency converter failure output;
The other end of frequency converter failure output connects the normally opened contact of start button and blower fan contactor KM2;
The other end of start button connects first coil of main motor contactor KM1;
The normally opened contact other end of blower fan contactor KM2 connects second coil of blower fan contactor KM2;
First coil is connected the back and is connected with the tertiary coil that newly adds relay K A with second coil;
The other end of tertiary coil connects a circuit of fan switch;
The other end three-line of fan switch connects the normally opened contact of blower fan contactor KM2;
The other end of the normally opened contact of blower fan contactor KM2 connects the cooling blower motor;
The other end three-line of frequency converter connects the normally opened contact of main motor contactor KM1; The other end of the normally opened contact of main motor contactor KM1 connects main motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320112129 CN203233141U (en) | 2013-03-13 | 2013-03-13 | Independent cooling fan interlocking protection device of variable-frequency motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320112129 CN203233141U (en) | 2013-03-13 | 2013-03-13 | Independent cooling fan interlocking protection device of variable-frequency motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203233141U true CN203233141U (en) | 2013-10-09 |
Family
ID=49289245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320112129 Expired - Fee Related CN203233141U (en) | 2013-03-13 | 2013-03-13 | Independent cooling fan interlocking protection device of variable-frequency motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203233141U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107947678A (en) * | 2017-10-30 | 2018-04-20 | 华润电力（贺州）有限公司 | A kind of variable-frequency motor transforms circuit |
| CN107994545A (en) * | 2017-12-12 | 2018-05-04 | 深圳市英威腾电气股份有限公司 | The protection circuit and electric system of a kind of wind turbine |
-
2013
- 2013-03-13 CN CN 201320112129 patent/CN203233141U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107947678A (en) * | 2017-10-30 | 2018-04-20 | 华润电力（贺州）有限公司 | A kind of variable-frequency motor transforms circuit |
| CN107994545A (en) * | 2017-12-12 | 2018-05-04 | 深圳市英威腾电气股份有限公司 | The protection circuit and electric system of a kind of wind turbine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131009 Termination date: 20210313 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |