CN218633744U - Duplex variable frequency control cabinet - Google Patents
Duplex variable frequency control cabinet Download PDFInfo
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- CN218633744U CN218633744U CN202222436979.XU CN202222436979U CN218633744U CN 218633744 U CN218633744 U CN 218633744U CN 202222436979 U CN202222436979 U CN 202222436979U CN 218633744 U CN218633744 U CN 218633744U
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Abstract
The utility model relates to a pair variable frequency control cabinet, include: the frequency conversion control circuit comprises a frequency conversion circuit breaker and a frequency converter which are sequentially connected, the output end of the frequency converter is connected with a control circuit, the control circuit is connected with a first control contactor and a second control contactor, the first control contactor is connected with a first motor, and the second control contactor is connected with a second motor; the first power frequency control loop comprises a first power frequency circuit breaker, a third control contactor and a first thermal relay which are sequentially connected; the second power frequency control loop comprises a second power frequency circuit breaker, a fourth control contactor and a second thermal relay which are sequentially connected; and a control device. The utility model discloses need not to set up the converter alone to every group motor, frequency conversion control's instruction has controlling means to unify going on, and control process is simple and convenient and with low costs.
Description
Technical Field
The utility model relates to an automatic control circuit technical field especially relates to a pair variable frequency control cabinet.
Background
A motor is usually controlled by one frequency converter in the current control cabinet, the control process is single, two or more motors need to be used for switching operation in turn in some application scenes, a plurality of frequency converters need to be arranged at the moment, the control process is complex, and the cost is high.
SUMMERY OF THE UTILITY MODEL
In view of the above shortcomings in the prior art, an object of the present invention is to provide a duplex frequency conversion control cabinet, which has the advantages of simple and convenient control process and low cost.
To achieve the above and other related objects, the present invention provides the following technical solutions:
a duplex variable frequency control cabinet comprises:
the frequency conversion control circuit comprises a frequency conversion circuit breaker and a frequency converter which are sequentially connected, wherein the output end of the frequency converter is connected with a control circuit, the control circuit is connected with a first control contactor and a second control contactor, the first control contactor is connected with a first motor, and the second control contactor is connected with a second motor;
the power supply circuit comprises a first power frequency control loop, a second power frequency control loop and a control circuit, wherein one end of the first power frequency control loop is connected with a power supply circuit, the other end of the first power frequency control loop is connected with a first motor, the first power frequency control loop comprises a first power frequency circuit breaker, a third control contactor and a first thermal relay which are sequentially connected, and the third control contactor is connected with the first control contactor in an interlocking manner;
the power supply circuit at one end of the second power frequency control loop is connected, the other end of the second power frequency control loop is connected with a second motor, the second power frequency control loop comprises a second power frequency circuit breaker, a fourth control contactor and a second thermal relay which are sequentially connected, and the fourth control contactor is connected with the second control contactor in an interlocking manner; and the number of the first and second groups,
and the control device is connected with the frequency converter, the first motor and the second motor and is used for controlling the start and stop of the first motor and the second motor.
When the technical scheme is realized, the frequency conversion control is carried out through the frequency conversion control loop, the on-off of the first motor and/or the second motor is realized by selectively closing the first control contactor and/or the second control contactor, so that one group of motors can be controlled independently or two groups of motors can be controlled simultaneously without independently arranging a frequency converter for each group of motors, the frequency conversion control instruction is carried out by a control device in a unified way, and the control process is simple and convenient and has low cost; the power frequency control of the second motor of the first motor is realized through the first power frequency control loop and the second power frequency control loop respectively, and because the third control contactor is interlocked with the first control contactor, and the fourth control contactor is interlocked with the second control contactor, the condition of simultaneously selecting power frequency control and frequency conversion control can not appear, the stability of the control process is ensured, under the power frequency control mode, the starting, stopping and working of the first motor and the second motor can also be carried out by the control device in a centralized manner, and the control process is also very simple.
As a preferred scheme of the utility model, still include mode selection switch, mode selection switch includes first control contact and second control contact, first control contact corresponds selects the manual control mode, the second control contact corresponds selects the automatic control mode, first control contact is connected with first control relay, the second control contact is connected with the second control relay.
As a preferred scheme of the utility model, the contact switch of first control relay with the contact switch parallel connection of second control relay, the contact switch series connection of first control relay has the control switch group, the contact switch series connection of second control relay in controlling means.
As a preferable aspect of the present invention, the control switch group includes: a first manual starting switch, a first manual closing switch and a first variable-frequency starting switch which correspond to the first motor; a second manual starting switch, a second manual closing switch and a second variable-frequency starting switch which correspond to the second motor; and a variable frequency on switch and a variable frequency off switch.
The technical scheme is realized, a manual control mode or an automatic control mode can be selected through a mode selection switch, under the manual control mode, the working start and stop of a first motor and a second motor under a power frequency control mode are realized through a first manual starting switch, a first manual closing switch, a second manual starting switch and a second manual closing switch, and the working start and stop of the first motor and the second motor under the frequency conversion control mode are realized through a first frequency conversion starting switch, a second frequency conversion starting switch, a frequency conversion starting switch and a frequency conversion closing switch; and in the automatic control mode, the control device automatically controls the start and stop of the work of the first motor and the second motor.
As a preferred scheme of the utility model, controlling means still is connected with the pilot lamp group.
According to the technical scheme, the running state and the fault state of the first motor, the second motor and the frequency converter can be indicated through the lamp set.
As a preferred scheme of the utility model, controlling means includes PLC controller and host computer.
As above, the utility model discloses a pair variable frequency control cabinet has following beneficial effect:
the embodiment of the utility model provides a pair of variable frequency control cabinet, during the use, carry out variable frequency control through the variable frequency control return circuit, through selecting closed first control contactor and/or second control contactor, realize the break-make of first motor and/or second motor to realize controlling a set of motor alone or controlling two sets of motors simultaneously, and need not to set up the converter alone to every set of motor, variable frequency control's instruction has the controlling means to go on in unison, and the control process is simple and convenient and with low costs; the power frequency control of the second motor of the first motor is realized through the first power frequency control loop and the second power frequency control loop respectively, and because the third control contactor is interlocked with the first control contactor, and the fourth control contactor is interlocked with the second control contactor, the condition that power frequency control and frequency conversion control are selected simultaneously can not appear, the stability of the control process is ensured, under the power frequency control mode, the starting, stopping and working of the first motor and the second motor can be also carried out in a centralized manner by the control device, and the control process is also very simple.
Drawings
Fig. 1 shows a schematic circuit diagram of the embodiment of the present invention, which is a frequency conversion control loop, a first power frequency control loop, and a second power frequency control loop.
Fig. 2 shows the embodiment of the present invention is a schematic circuit diagram corresponding to the power frequency control of the first motor.
Fig. 3 shows a schematic circuit diagram of the embodiment of the present invention corresponding to the power frequency control of the second motor.
Fig. 4 shows a first circuit schematic diagram of frequency conversion control according to an embodiment of the present invention.
Fig. 5 shows a second schematic circuit diagram of frequency conversion control according to an embodiment of the present invention.
The corresponding part names indicated by the numbers and letters in the drawings:
1. a variable frequency control loop; QF2, a variable frequency circuit breaker; 11. a frequency converter; 12. a control circuit; 1KM1 and a first control contactor; 1KM3 and a second control contactor; m1, a first motor; m2, a second motor; 2. a first power frequency control loop; QF1, a first power frequency circuit breaker; KM1, a third control contactor; FR1, a first thermal relay; 3. a second power frequency control loop; QF3, a second power frequency breaker; KM3 and a fourth control contactor; FR3, second thermal relay; 1SA1, a mode selection switch; szKA1, a first control relay; szKA2 and a second control relay; 1SBg1, a first manual starting switch; 1SBr1, a first manual closing switch; 2SA1, a first variable-frequency starting switch; 3SBg1, a second manual starting switch; 3SBr1, a second manual closing switch; 2SA2, a second variable frequency starting switch; 2SBg1, a variable frequency starting switch; 2SBr1, a variable frequency closing switch; 4. and an indicator light group.
Detailed Description
The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.
Please refer to fig. 1 to 5. It should be understood that the structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any structure modification, ratio relationship change or size adjustment should still fall within the scope that the technical content disclosed in the present invention can cover without affecting the function that the present invention can produce and the purpose that the present invention can achieve. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.
Referring to fig. 1 to 5, the present invention provides a duplex frequency conversion control cabinet, including: the control system comprises a variable-frequency control loop 1, wherein one end of the variable-frequency control loop 1 is connected to a power supply circuit, the variable-frequency control loop 1 comprises a variable-frequency breaker QF2 and a frequency converter 11 which are sequentially connected, the output end of the frequency converter 11 is connected with a control circuit 12, the control circuit 12 is connected with a first control contactor 1KM1 and a second control contactor 1KM3, the first control contactor 1KM1 is connected with a first motor M1, and the second control contactor 1KM3 is connected with a second motor M2; the system comprises a first power frequency control loop 2, wherein one end of the first power frequency control loop 2 is connected with a power line, the other end of the first power frequency control loop 2 is connected with a first motor M1, the first power frequency control loop 2 comprises a first power frequency circuit breaker QF1, a third control contactor KM1 and a first thermal relay FR1 which are sequentially connected, and the third control contactor KM1 is connected with the first control contactor KM1 in an interlocking manner; a second power frequency control loop 3, wherein one end of the second power frequency control loop 3 is connected with a power line, the other end of the second power frequency control loop 3 is connected with a second motor M2, the second power frequency control loop 3 comprises a second power frequency circuit breaker QF3, a fourth control contactor KM3 and a second thermal relay FR3 which are sequentially connected, and the fourth control contactor KM3 is connected with a second control contactor 1KM3 in an interlocking manner; and the control device is connected to the frequency converter 11, the first motor M1 and the second motor M2 and is used for controlling the start and stop of the first motor M1 and the second motor M2.
Wherein, controlling means includes PLC controller and host computer, and third control contactor KM1 specifically indicates with first control contactor 1KM1 interlocking connection: when the third control contactor KM1 is in a closed state, the first control contactor 1KM1 is in an open state, and on the contrary, when the third control contactor KM1 is in an open state, the first control contactor 1KM1 is in a closed state; correspondingly, the interlocking connection of the fourth control contactor KM3 and the second control contactor 1KM3 specifically means: when the fourth control contactor KM3 is in the closed state, the second control contactor 1KM3 is in the open state, whereas when the fourth control contactor KM3 is in the open state, the second control contactor 1KM3 is in the closed state.
Further, the duplex variable frequency control cabinet of this embodiment still includes mode selection switch 1SA1, mode selection switch 1SA1 includes first control contact and second control contact, first control contact corresponds selects the manual control mode, the second control contact corresponds selects the automatic control mode, first control contact is connected with first control relay szKA1, the second control contact is connected with second control relay szKA2, and the contact switch of first control relay szKA1 and the contact switch parallel connection of second control relay szKA2 ware, the contact switch series connection of first control relay szKA1 has the control switch group, the contact switch series connection of second control relay szKA2 ware is in controlling means.
The control switch group specifically includes: a first manual starting switch 1SBg1, a first manual closing switch 1SBr1 and a first variable-frequency starting switch 2SA1 of the corresponding first motor M1; a second manual starting switch 3SBg1, a second manual closing switch 3SBr1 and a second variable frequency starting switch 2SA2 corresponding to the second motor M2; and a variable frequency on switch 2SBg1 and a variable frequency off switch 2SBr1.
A manual control mode or an automatic control mode can be selected through a mode selection switch 1SA1, under the manual control mode, the first motor M1 and the second motor M2 are started and stopped in a power frequency control mode through a first manual starting switch 1SBg1, a first manual closing switch 1SBr1, a second manual starting switch 3SBg1 and a second manual closing switch 3SBr1, and the first motor M1 and the second motor M2 are started and stopped in a frequency conversion control mode through a first frequency conversion starting switch 2SA1, a second frequency conversion starting switch 2SA2, a frequency conversion starting switch 2SBg1 and a frequency conversion closing switch 2SBr 1; the control device automatically controls the work start and stop of the first motor M1 and the second motor M2 under the automatic control mode, wherein, under the manual mode, whether the first motor M1 and the second motor M2 are subjected to frequency conversion control is selected through the first frequency conversion starting switch 2SA1 and the second frequency conversion starting switch 2SA2 respectively, and the motors under the frequency conversion control state are selected to be started or stopped through the frequency conversion starting switch 2SBg1 and the frequency conversion stopping switch 2SBr1.
Simultaneously, in this embodiment, controlling means still is connected with pilot lamp group 4, and pilot lamp group 4 includes: the power frequency fault detection device comprises a first power frequency operation indicator lamp 1Hg1, a first power frequency stop indicator lamp 1Hr1, a first power frequency fault indicator lamp 1Hy1, a second power frequency operation indicator lamp 3Hg1, a second power frequency stop indicator lamp 3Hr1, a second power frequency fault indicator lamp 3Hy1, a variable frequency operation indicator lamp 2Hg21, a variable frequency stop indicator lamp 2Hr21, a variable frequency fault indicator lamp 2Hy1 and the like, and the running state and the fault state of a first motor M1, a second motor M2 and a frequency converter 11 can be indicated through a lamp bank.
When the control device is used, the frequency conversion control is carried out through the frequency conversion control loop 1, the on-off of the first motor M1 and/or the second motor M2 is realized by selectively closing the first control contactor 1KM1 and/or the second control contactor 1KM3, so that one group of motors can be controlled independently or two groups of motors can be controlled simultaneously, the frequency converter 11 does not need to be arranged independently for each group of motors, the frequency conversion control instruction is carried out uniformly by the control device, the control process is simple and convenient, and the cost is low; realize respectively the power frequency control to first motor M1's second motor M2 through first power frequency control circuit 2 and second power frequency control circuit 3, and because third control contactor KM1 and first control contactor 1KM1 interlocking, fourth control contactor KM3 and second control contactor 1KM3 interlocking, consequently the condition of selecting power frequency control and frequency conversion control simultaneously can not appear, control process's stability has been guaranteed, under the power frequency control mode, start-stop and work of first motor M1 and second motor M2 also can be concentrated by controlling means and go on, control process is also very simple.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (6)
1. A pair frequency conversion switch board which characterized in that includes:
the frequency conversion control circuit comprises a frequency conversion circuit breaker and a frequency converter which are sequentially connected, wherein the output end of the frequency converter is connected with a control circuit, the control circuit is connected with a first control contactor and a second control contactor, the first control contactor is connected with a first motor, and the second control contactor is connected with a second motor;
the power supply circuit at one end of the first power frequency control loop is connected, the other end of the first power frequency control loop is connected with the first motor, the first power frequency control loop comprises a first power frequency circuit breaker, a third control contactor and a first thermal relay which are sequentially connected, and the third control contactor is connected with the first control contactor in an interlocking manner;
the power supply circuit at one end of the second power frequency control loop is connected, the other end of the second power frequency control loop is connected with a second motor, the second power frequency control loop comprises a second power frequency circuit breaker, a fourth control contactor and a second thermal relay which are sequentially connected, and the fourth control contactor is connected with the second control contactor in an interlocking manner; and (c) a second step of,
and the control device is connected with the frequency converter, the first motor and the second motor and is used for controlling the start and stop of the first motor and the second motor.
2. The duplex frequency conversion control cabinet according to claim 1, further comprising a mode selection switch, wherein the mode selection switch comprises a first control contact and a second control contact, the first control contact is corresponding to select a manual control mode, the second control contact is corresponding to select an automatic control mode, the first control contact is connected with a first control relay, and the second control contact is connected with a second control relay.
3. A twin frequency conversion control cabinet according to claim 2, wherein the contact switch of the first control relay is connected in parallel with the contact switch of the second control relay, the contact switch of the first control relay is connected in series with the control switch group, and the contact switch of the second control relay is connected in series with the control device.
4. The duplex variable frequency control cabinet of claim 3, wherein the control switch group comprises: a first manual starting switch, a first manual closing switch and a first variable-frequency starting switch which correspond to the first motor; a second manual starting switch, a second manual closing switch and a second variable frequency starting switch which correspond to the second motor; and a variable frequency on switch and a variable frequency off switch.
5. The duplex variable frequency control cabinet according to claim 1, wherein the control device is further connected with an indicator lamp set.
6. The duplex variable frequency control cabinet according to claim 1, wherein the control device comprises a PLC controller and an upper computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222436979.XU CN218633744U (en) | 2022-09-14 | 2022-09-14 | Duplex variable frequency control cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222436979.XU CN218633744U (en) | 2022-09-14 | 2022-09-14 | Duplex variable frequency control cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218633744U true CN218633744U (en) | 2023-03-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222436979.XU Active CN218633744U (en) | 2022-09-14 | 2022-09-14 | Duplex variable frequency control cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218633744U (en) |
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2022
- 2022-09-14 CN CN202222436979.XU patent/CN218633744U/en active Active
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