CN209104790U - Low-voltage variable-frequency motor cooling blower electric control circuit - Google Patents
Low-voltage variable-frequency motor cooling blower electric control circuit Download PDFInfo
- Publication number
- CN209104790U CN209104790U CN201821891362.4U CN201821891362U CN209104790U CN 209104790 U CN209104790 U CN 209104790U CN 201821891362 U CN201821891362 U CN 201821891362U CN 209104790 U CN209104790 U CN 209104790U
- Authority
- CN
- China
- Prior art keywords
- relay
- host
- cooling blower
- blower
- fkm
- 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.)
- Active
Links
Landscapes
- Control Of Multiple Motors (AREA)
- Control Of Positive-Displacement Air Blowers (AREA)
Abstract
The utility model belongs to electric control circuit field, and in particular to a kind of low-voltage variable-frequency motor cooling blower electric control circuit.The utility model is by the way of increasing electrothermal relay KH; guarantee to cut off the power in time when cooling blower failure; and it realizes and interlocks by blower relay FKM and frequency conversion host; in the case where not changing cost of investment substantially; solve cooling blower failure or it is inactive when; it can be found in time, while make frequency conversion main shut-down system, not will cause variable-frequency motor and cross cause thermal damage.
Description
Technical field
The utility model belongs to electric control circuit field, and in particular to a kind of low-voltage variable-frequency motor cooling blower electric-controlled
Circuit processed.
Background technique
Under normal circumstances, common low-voltage variable-frequency motor carries cooling blower distribution and uses miniature circuit breaker, ignores miniature
The problem of breaker pitch capability deficiency.Secondly, using traditional manual control mode in control, or rely on frequency converter UF
The mode for interlocking contact interlocked startup fails discovery in time there are cooling blower failure and variable-frequency motor is caused to burn out.
Utility model content
For the utility model in order to solve above-mentioned problems of the prior art, the utility model provides a kind of low pressure change
Frequency motor cooling blower electric control circuit, can variable-frequency motor cooling blower failure or it is inactive when, can be sent out in time
It is existing, while making frequency conversion main shut-down system, it not will cause variable-frequency motor and cross cause thermal damage, and do not change cost of investment substantially, have good
Good safe effect and economic benefit.
The specific technical solution that the utility model uses is:
Low-voltage variable-frequency motor cooling blower electric control circuit, including major loop and control loop, the major loop packet
Include frequency conversion host, cooling blower and electrical source of power, the cooling blower is connect with electrical source of power, the frequency conversion host by
Frequency converter UF is connect with electrical source of power,
The control loop includes switching circuit, blower relay FKM, host relay KA and controls power supply, described
Switching circuit input terminal be connected on control power supply output end, the coil and host relay of the blower relay FKM
The coil of KA is connected on respectively between the output end of switching circuit and control power input, the blower relay FKM's
First normally opened contact is connected between cooling blower and electrical source of power, the normally opened contact and frequency converter of the host relay KA
The control terminal of UF is connected,
The coil of the host relay KA is also in series with the second normally opened contact of blower relay FKM, the master
Electrothermal relay KH is had additional in circuit, the thermal element of the electrothermal relay KH is connected on the electrical source of power input of cooling blower
End, the normally-closed contact of the electrothermal relay KH are connected on the output end of switching circuit, the coil of the blower relay FKM
And the coil of host relay KA is connected by the output end of the normally-closed contact of electrothermal relay KH and switching circuit respectively.
The switching circuit includes change-over switch SA and is connected on change-over switch SA output end and electrothermal relay KH respectively
Normally-closed contact between manual switch circuit, holding circuit and automatic switching circuit,
The manual switch circuit includes stop button SBS and rotating forward button SBF,
The holding circuit includes the third normally opened contact for being connected in parallel on the blower relay FKM for rotating forward the both ends button SBF,
The automatic switching circuit includes the normally opened contact of auto-relay K.
The host relay KA is parallel with run indicator PGG2.
The control loop further includes the host indicating circuit being connected between control power output end and input terminal, institute
The host indicating circuit stated includes host indicator light PGG1, and the output contact K1 of the frequency converter UF is connected on control power supply
Between output end and host indicator light PGG1.
The both ends host indicator light PGG1 are parallel with the coil of chain output relay KA2.
The cooling blower and electrical source of power is in series with fuse FU.
The beneficial effects of the utility model are:
The utility model by the way of increasing electrothermal relay KH guarantees that electricity can be cut off in time when cooling blower failure
Source, and realize and interlock, in the case where not changing cost of investment substantially, solve by blower relay FKM and frequency conversion host
Cooling blower failure or it is inactive when, can be found in time, while making frequency conversion main shut-down system, not will cause variable-frequency motor overheat
Damage.
Detailed description of the invention
Fig. 1 is the schematic diagram of the utility model main circuit；
Fig. 2 is the schematic diagram of the utility model control circuit；
In attached drawing, 1, frequency conversion host, 2, cooling blower, 3, electrical source of power, 4, control power supply.
Specific embodiment
With reference to the accompanying drawing and specific embodiment the utility model is described in further detail:
Specific embodiment is as shown in Figures 1 and 2, and the utility model is a kind of low-voltage variable-frequency motor cooling blower electrical control
Circuit, including major loop and control loop, the major loop include frequency conversion host 1, cooling blower 2 and electrical source of power 3, described
Cooling blower 2 connect with electrical source of power 3, the frequency conversion host 1 is connect by frequency converter UF with electrical source of power 3,
The control loop includes switching circuit, blower relay FKM, host relay KA and controls power supply 4, described
Switching circuit input terminal be connected on control power supply 4 output end, the coil and host relay of the blower relay FKM
The coil of KA is connected on respectively between the output end of switching circuit and control 4 input terminal of power supply, the blower relay FKM's
First normally opened contact is connected between cooling blower 2 and electrical source of power 3, the normally opened contact of the host relay KA and frequency conversion
The control terminal of device UF is connected,
The coil of the host relay KA is also in series with the second normally opened contact of blower relay FKM, the master
Electrothermal relay KH is had additional in circuit, the electrical source of power 3 that the thermal element of the electrothermal relay KH is connected on cooling blower 2 inputs
End, the normally-closed contact of the electrothermal relay KH are connected on the output end of switching circuit, the coil of the blower relay FKM
And the coil of host relay KA is connected by the output end of the normally-closed contact of electrothermal relay KH and switching circuit respectively.
The control flow of the utility model is to be switched on or switched off the power supply of control loop by switching circuit, to realize
The power supply and power-off of main circuit, specifically, when switching circuit is connected, as shown in Fig. 2, the coil of blower relay FKM obtains electric, wind
The first, second and third normally opened contact of machine relay FKM acts, and is switched to closed state and keeps, at this point,
The first normally opened contact of blower relay FKM is closed so that cooling blower 2 works on power in main circuit,
The second normally opened contact of blower relay FKM is closed so that the coil of host relay KA obtains electric, i.e. node 23,24
Conducting, the normally opened contact closure of host relay KA, frequency converter UF obtains electric, and frequency conversion host 1 works on power, to ensure that cold
But blower 2 works on power with the successive of frequency conversion host 1,
Further, the switching circuit includes change-over switch SA and is connected on change-over switch SA output end and heat respectively
Manual switch circuit, holding circuit and automatic switching circuit between the normally-closed contact of relay KH,
The manual switch circuit includes stop button SBS and rotating forward button SBF,
The holding circuit includes the third normally opened contact for being connected in parallel on the blower relay FKM for rotating forward the both ends button SBF,
After being manually pressed by rotating forward button SBF, node 3,4 is connected, and blower relay FKM coil obtains electric, blower relay
The third normally opened contact of FKM is closed, i.e., node 13,14 is connected and forms close access in parallel with button SBF is rotated forward, and works as rotating forward
Button SBF is disconnected after loosing one's grip, the connection of the third normally opened contact holding circuit of just closed blower relay FKM, when need
Stop button SBS is pressed when disconnecting, node 1,2 disconnects, so that control circuit integral reset, blower relay FKM's
Normally open is restored in three groups of contacts, i.e. node 13,14 disconnects.
Further, the automatic switching circuit includes the normally opened contact of auto-relay K.The auto-relay
K can be driven by PLC controller, normally opened contact be used for be used as power switch, two change-over switch SA by personnel carry out manually and from
The diversification of control is realized in dynamic switching.
Based on said switching circuit, 1 start and stop of interlocked control frequency conversion host are realized, if cooling blower 2 is out of service or not
Starting, then frequency conversion host 1 is out of service or can not start.Frequency conversion host 1 and cooling blower 2 have the interlocking of successive start and stop to close
System.
Further, when blower relay FKM obtains electric, so that node 23,24 is connected, the described host relay KA is in parallel
Run indicator PGG2 light, thus play the role of operation instruction.3, fortune is set in variable-frequency motor on the spot control button station
Row indicator light PGG2, while 2 run signal of cooling blower is led to that PLC (computer control) system monitors, work as cooling wind
When 2 distribution loop of machine or fan trouble, the second contact K2 of frequency converter UF is disconnected, to form robot control system(RCS) fault alarm letter
Number, personnel can discover and rule out in time.
Further, the control loop further includes the host being connected between control 4 output end of power supply and input terminal
Indicating circuit, the host indicating circuit include host indicator light PGG1, the output contact K1 series connection of the frequency converter UF
Between the output end and host indicator light PGG1 of control power supply 4.Output contact K1 the opening as host indicating circuit
It closes, host indicator light PGG1 is enabled to indicate the working condition of frequency converter UF.
Further, the both ends host indicator light PGG1 are parallel with the coil of chain output relay KA2.By even
The switchable control of lock output relay KA2 needs to carry out chain other equipment with frequency converter UF, to reduce control device, saves
About control cost.
2 power distribution protection of cooling blower switch uses fuse FU, solves to be segmented energy using miniature circuit breaker in Normal practice
Power is insufficient, and uses the problem that molded-case switch is oversized and cost is excessively high.
Claims (6)
1. low-voltage variable-frequency motor cooling blower electric control circuit, including major loop and control loop, the major loop include
Frequency conversion host (1), cooling blower (2) and electrical source of power (3), the cooling blower (2) is connect with electrical source of power (3), described
Frequency conversion host (1) connect by frequency converter UF with electrical source of power (3),
The control loop includes switching circuit, blower relay FKM, host relay KA and controls power supply (4), described
Switching circuit input terminal is connected on the output end of control power supply (4), the coil and host relay of the blower relay FKM
The coil of KA is connected on respectively between the output end of switching circuit and control power supply (4) input terminal, the blower relay FKM
The first normally opened contact be connected between cooling blower (2) and electrical source of power (3), the normally opened contact of the host relay KA
It connects with the control terminal of frequency converter UF,
It is characterized by: the coil of the host relay KA is also in series with the second normally opened contact of blower relay FKM, institute
Electrothermal relay KH is had additional in the major loop stated, the thermal element of the electrothermal relay KH is connected on the power of cooling blower (2)
Power supply (3) input terminal, the normally-closed contact of the electrothermal relay KH are connected on the output end of switching circuit, the blower relay
The coil of device FKM and the coil of host relay KA are respectively by the normally-closed contact of electrothermal relay KH and the output end of switching circuit
Connection.
2. low-voltage variable-frequency motor cooling blower electric control circuit according to claim 1, it is characterised in that: described opens
Powered-down road includes change-over switch SA and is connected between change-over switch SA output end and the normally-closed contact of electrothermal relay KH respectively
Manual switch circuit, holding circuit and automatic switching circuit,
The manual switch circuit includes stop button SBS and rotating forward button SBF,
The holding circuit includes the third normally opened contact for being connected in parallel on the blower relay FKM for rotating forward the both ends button SBF,
The automatic switching circuit includes the normally opened contact of auto-relay K.
3. low-voltage variable-frequency motor cooling blower electric control circuit according to claim 1, it is characterised in that: the master
Machine relay KA is parallel with run indicator PGG2.
4. low-voltage variable-frequency motor cooling blower electric control circuit according to claim 1, it is characterised in that: the control
Circuit processed further includes the host indicating circuit for being connected on control power supply (4) between output end and input terminal, the host instruction
Circuit includes host indicator light PGG1, the output contact K1 of the frequency converter UF be connected on the output end of control power supply (4) with
Between host indicator light PGG1.
5. low-voltage variable-frequency motor cooling blower electric control circuit according to claim 4, it is characterised in that: the master
The both ends machine indicator light PGG1 are parallel with the coil of chain output relay KA2.
6. low-voltage variable-frequency motor cooling blower electric control circuit according to claim 1, it is characterised in that: described is cold
But blower (2) and electrical source of power (3) are in series with fuse FU.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821891362.4U CN209104790U (en) | 2018-11-16 | 2018-11-16 | Low-voltage variable-frequency motor cooling blower electric control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821891362.4U CN209104790U (en) | 2018-11-16 | 2018-11-16 | Low-voltage variable-frequency motor cooling blower electric control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209104790U true CN209104790U (en) | 2019-07-12 |
Family
ID=67160094
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821891362.4U Active CN209104790U (en) | 2018-11-16 | 2018-11-16 | Low-voltage variable-frequency motor cooling blower electric control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209104790U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115159025A (en) * | 2022-07-18 | 2022-10-11 | 天地(榆林)开采工程技术有限公司 | Control method and device of belt conveyor and belt conveyor |
-
2018
- 2018-11-16 CN CN201821891362.4U patent/CN209104790U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115159025A (en) * | 2022-07-18 | 2022-10-11 | 天地(榆林)开采工程技术有限公司 | Control method and device of belt conveyor and belt conveyor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203788042U (en) | Circuit capable of realizing automatic switching of two-way power supply | |
| CN202649841U (en) | Storage battery oven control circuit | |
| CN201298176Y (en) | Oil pump controlling cabinet of transformer cooling fan | |
| CN209104790U (en) | Low-voltage variable-frequency motor cooling blower electric control circuit | |
| CN103427479B (en) | Method for switching safety power sources of power plant on basis of DCS (distributed control system) | |
| CN201786623U (en) | Primary sintering deoxidization pump station automatic early warning system | |
| CN205666679U (en) | UPS of bypass automatic switch -over type | |
| CN203774871U (en) | Open-loop mode operation based hybrid networking power network system | |
| CN203259903U (en) | Forced-oil-air cooling transformer energy-saving control system | |
| CN203014354U (en) | Circuit for controlling auxiliary device of large units | |
| CN202798126U (en) | Automatic switching system for uninterrupted power supply of PLC (programmable logic controller) | |
| CN110531642A (en) | A kind of safe power-off system of tobacco cutting equipment | |
| CN103532445B (en) | A kind of startup control device of heavy load start of motor and control method thereof | |
| CN202196299U (en) | Intelligent transformer cooling control system | |
| CN206806982U (en) | A kind of three-phase four-wire power phase shortage and phase sequence warning device | |
| CN210428118U (en) | Safe power-off system of tobacco shred making equipment | |
| CN204041502U (en) | A kind of cooling blower control system | |
| CN210577762U (en) | Strong current control detection system of turbine generator | |
| CN102368632B (en) | Dual-power switching system | |
| CN107769363A (en) | The apparatus and method that forced oil-circulation air-cooled transformer cooler is thrown by force | |
| CN204361781U (en) | There is the protection switch of automatic reclosing function | |
| CN202889265U (en) | Soft starter control system driving three-phase squirrel cage asynchronous motor to operate | |
| CN202309208U (en) | Dual power supply switching system | |
| CN210154027U (en) | Fault-tolerant circuit of variable-frequency air conditioner controller | |
| CN2938530Y (en) | Air-cooled control cabinet of converting station |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |