CN201898321U - Cooling control circuit of variable frequency motor - Google Patents
Cooling control circuit of variable frequency motor Download PDFInfo
- Publication number
- CN201898321U CN201898321U CN 201020644672 CN201020644672U CN201898321U CN 201898321 U CN201898321 U CN 201898321U CN 201020644672 CN201020644672 CN 201020644672 CN 201020644672 U CN201020644672 U CN 201020644672U CN 201898321 U CN201898321 U CN 201898321U
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- CN
- China
- Prior art keywords
- frequency motor
- variable frequency
- cooling fan
- variable
- switch
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- 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
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- Control Of Multiple Motors (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
The utility model discloses a cooling control circuit of a variable frequency motor, which comprises a main loop of the variable frequency motor, and is characterized in that a power switch of a cooling fan is connected with a switch of the main loop of the variable frequency motor in parallel; a normally closed point of a thermal relay of the circuit and a pair of normally opened auxiliary points of the power switch are connected in a start loop of the variable frequency motor in series; one pair of normally opened points starting the relay is used for conducting or cutting off a contactor coil of the cooling fan; and a pair of normally opened auxiliary points of the switch of the cooling fan is connected in the start loop of the variable frequency motor in series. The cooling control circuit of the variable frequency motor can lead the variable frequency motor to synchronously run with the cooling fan so as to prevent the variable frequency motor from being burnt caused by the abnormal working of the cooling fan. The cooling control circuit of the variable frequency motor is simple and quick to be operated at posts, has the characteristics of being reasonable in design, simple in structure, safe and reliable, convenient to transform, and the like, and is suitable for promotion and popularization.
Description
Technical field:
The utility model is specifically related to a kind of variable-frequency motor cooling control circuit.
Background technology:
Have cooling fan on the variable-frequency motor, the cooling fan motor control loop is an independent loop, and frequency conversion master motor is uncontrollable, the cooling fan ring current control switch that only closes, and cooling fan motor just moves, otherwise does not move.In case and cooling fan motor takes place variable-frequency motor not to be had cooling effect, variable-frequency motor long-time running meeting generation burn-down of electric motor accident unusually.
Summary of the invention:
For fear of frequency conversion master motor operation and its cooling fan does not move, burn the accident of main motor, the utility model provides a kind of variable-frequency motor cooling control circuit of main motor and its cooling fan motor synchronous operation.
The utility model comprises the variable-frequency motor major loop, it is characterized in that the cooling fan mains switch is parallel-connected on the variable-frequency motor major loop switch, the normally closed point of its thermal relay and mains switch a pair of often opened auxiliary magnet all be connected in series to variable-frequency motor and start in the loop, simultaneously with being switched on or switched off a pair of normal battle of starting relay the cooling fan contactor coil.
If damaging, the normally closed point of cooling fan thermal relay can not in time disconnect frequency conversion master electric motor starting loop, when perhaps its contacts of contactor adhesion can not deenergization, when causing the cooling fan switch trip, disconnect the startup loop by sealing in a pair of auxiliary normally opened contact that starts the cooling fan switch in the loop, realize disconnecting the operation of frequency conversion master motor and cooling fan motor.
The utility model can make variable-frequency motor and cooling fan synchronous operation, the accident that causes variable-frequency motor to burn when avoiding cooling fan work undesired, post operation is simple, quick, has characteristics such as reasonable in design, simple in structure, safe and reliable, that transformation is convenient, is suitable for popularizing.
Description of drawings:
Fig. 1 is the circuit diagram of the utility model embodiment.
Among the figure, QF, QF1---air switch, EV2000---frequency converter, SB---start button, SBS---stop button, KM1---contactor, GHK---change over switch, ZK1---starting relay, ZK2---auxiliary relay, FR---fan thermal relay.
Embodiment:
Embodiment: shown in Figure 1, present embodiment is in the variable-frequency motor major loop, with cooling fan mains switch QF1 and receive on the variable-frequency motor major loop QF switch, and a pair of auxiliary magnet (wire size 24) of often opening of the normally closed point of its thermal relay FR (wire size 4-0) and mains switch QF1 all is connected in series to variable-frequency motor and starts in the loop, use simultaneously and switch on and off a pair of normal battle (wire size 1-13) of starting relay ZK1 cooling fan contactor KM1 coil.
The course of work of present embodiment is: before variable-frequency motor starts operation, at first give cooling fan QF1 switch and frequency conversion master motor QF switch connection power supply, when change over switch GHK 1.-3. (manually) contact or 1.-9. (automatically) contacting, the auxiliary normally opened contact of QF1 is because the energized closure, press start button SB, starting relay ZK1 adhesive, the frequency converter enabling signal is given in its a pair of contact, the variable-frequency motor operation, another of ZK1 connected cooling fan contactor KM1 coil to normally opened contact (wire size 1-13) simultaneously, and cooling fan motor starts simultaneously.
When cooling fan motor has fault, thermal relay FR tripping operation, its normally-closed contact (wire size 4-0) disconnects variable-frequency motor and starts the loop, thereby variable-frequency motor is out of service, another of starting relay ZK1 disconnects cooling fan contactor KM1 coil to normally opened contact (wire size 1-13) simultaneously, and cooling fan motor stops simultaneously.If taking place in addition, the normally closed some damage of cooling fan thermal relay FR can not in time disconnect variable-frequency motor startup loop, when perhaps its contactor KM1 contact adhesion can not deenergization, cause cooling fan switch QF1 tripping operation, can disconnect the startup loop by sealing in a pair of auxiliary normally opened contact that starts the cooling fan QF1 switch in the loop, realize disconnecting the operation of variable-frequency motor and cooling fan motor.
Claims (1)
1. variable-frequency motor cooling control circuit, comprise the variable-frequency motor major loop, it is characterized in that the cooling fan mains switch is parallel-connected on the variable-frequency motor major loop switch, the normally closed point of its thermal relay and a pair of auxiliary magnet of often opening of mains switch all are connected in series in the variable-frequency motor startup loop, be switched on or switched off the cooling fan contactor coil a pair of normal battle with starting relay simultaneously, a pair of auxiliary normally opened contact of cooling fan switch is connected in series in the startup loop of variable-frequency motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020644672 CN201898321U (en) | 2010-12-03 | 2010-12-03 | Cooling control circuit of variable frequency motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020644672 CN201898321U (en) | 2010-12-03 | 2010-12-03 | Cooling control circuit of variable frequency motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201898321U true CN201898321U (en) | 2011-07-13 |
Family
ID=44256207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201020644672 Expired - Fee Related CN201898321U (en) | 2010-12-03 | 2010-12-03 | Cooling control circuit of variable frequency motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201898321U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105591365A (en) * | 2016-02-25 | 2016-05-18 | 珠海格力节能环保制冷技术研究中心有限公司 | Frequency converter main circuit relay failure protection method |
| CN107863917A (en) * | 2017-10-30 | 2018-03-30 | 华润电力（贺州）有限公司 | A kind of variable-frequency motor transformation circuit with cooling blower |
| 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 |
| CN111817187A (en) * | 2020-07-17 | 2020-10-23 | 江苏核电有限公司 | Nuclear power plant voltage stabilizer electric heater switch cooling device and control method thereof |
-
2010
- 2010-12-03 CN CN 201020644672 patent/CN201898321U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105591365A (en) * | 2016-02-25 | 2016-05-18 | 珠海格力节能环保制冷技术研究中心有限公司 | Frequency converter main circuit relay failure protection method |
| CN107863917A (en) * | 2017-10-30 | 2018-03-30 | 华润电力（贺州）有限公司 | A kind of variable-frequency motor transformation circuit with cooling blower |
| 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 |
| CN111817187A (en) * | 2020-07-17 | 2020-10-23 | 江苏核电有限公司 | Nuclear power plant voltage stabilizer electric heater switch cooling device and control method thereof |
| CN111817187B (en) * | 2020-07-17 | 2024-06-11 | 江苏核电有限公司 | Nuclear power plant voltage stabilizer electric heater switch cooling device and control method thereof |
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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: 20110713 Termination date: 20151203 |
|
| EXPY | Termination of patent right or utility model |