CN218547341U - Switchable variable-frequency starting control system and control cabinet for high-power motor - Google Patents
Switchable variable-frequency starting control system and control cabinet for high-power motor Download PDFInfo
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- CN218547341U CN218547341U CN202222435349.0U CN202222435349U CN218547341U CN 218547341 U CN218547341 U CN 218547341U CN 202222435349 U CN202222435349 U CN 202222435349U CN 218547341 U CN218547341 U CN 218547341U
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Abstract
The utility model relates to a changeable frequency conversion start control system of high-power motor, include: the frequency conversion main control loop comprises a first circuit breaker, a frequency converter and a first control contactor which are connected in sequence; the power frequency control loop comprises a second circuit breaker, a second control contactor, a third control contactor, a thermal relay and a fourth control contactor which are sequentially connected, wherein the second control contact is connected with the motor in a star connection mode, the thermal relay is connected with the motor in a triangular connection mode, and the thermal relay is connected between the motor and the fourth control contactor; a mode selection module connected to a power line, comprising: a first selection switch and a second selection switch; and a PLC controller. The utility model discloses four kinds of control mode of optional manual-power frequency mode, manual-frequency conversion mode, automatic-power frequency mode and automatic-frequency conversion mode to can satisfy different control demands, can realize the switching that star type starts and the operation of triangle-shaped simultaneously.
Description
Technical Field
The utility model relates to an automatic control circuit technical field especially relates to a changeable frequency conversion start control system of high-power motor and switch board.
Background
At present, the mode of frequency conversion control is generally adopted for carrying out high-power motor starting control, the control cabinet is arranged in a matched mode for carrying out centralized control, but the corresponding starting mode needs to be selected according to the actual situation in the actual operation process, the control mode of the existing control cabinet is single, and the requirement for selecting different situations is difficult to meet.
SUMMERY OF THE UTILITY MODEL
In view of the above prior art's shortcoming, the utility model aims to provide a changeable frequency conversion start control system of high-power motor and switch board has multiple control mode, can adapt to multiple operational aspect's control demand.
To achieve the above and other related objects, the present invention provides the following technical solutions:
a switchable variable-frequency starting control system of a high-power motor comprises:
the frequency conversion main control loop comprises a first circuit breaker, a frequency converter and a first control contactor which are sequentially connected;
the power frequency control circuit is connected to a power supply circuit and comprises a second circuit breaker, a second control contactor, a third control contactor, a thermal relay and a fourth control contactor which are sequentially connected, the second control contact is connected with a motor in a star connection mode, the thermal relay is connected with the motor in a triangular connection mode, the thermal relay is connected between the motor and the fourth control contactor, the second circuit breaker, the second control contactor and the fourth control contactor form a star starting circuit, and the second circuit breaker, the second control contactor, the third control contactor and the thermal relay form a triangular operation circuit;
a mode selection module connected to a power line, the mode selection module comprising: the system comprises a first selector switch and a second selector switch, wherein the first selector switch is used for selecting a power frequency control mode or a frequency conversion control mode, and the second selector switch is used for selecting a manual control mode or an automatic control mode; and the number of the first and second groups,
and the frequency converter and the motor are connected to the PLC, and the PLC responds to the automatic control mode to perform automatic control according to a set control program.
According to the technical scheme, when the motor is actually applied, according to actual needs, the power frequency control mode or the frequency conversion control mode is selected by the first selection switch through the mode selection module and is selected by the second selection switch to adopt the manual control mode or the automatic control mode, and four control modes of the manual-power frequency mode, the manual-frequency conversion mode, the automatic-power frequency mode and the automatic-frequency conversion mode can be played, so that different control requirements can be met, meanwhile, switching between star-type starting and triangular operation can be realized under the power frequency control mode, and the motor operation control is more stable.
As a preferred scheme of the utility model, the first selection switch comprises a power frequency control contact and a frequency conversion control contact, the power frequency control contact is connected with a first relay, and the frequency conversion control contact is connected with a second relay; the second selector switch comprises a manual control contact and an automatic control contact, the manual control contact is connected with a third relay, and the automatic control contact is connected with a fourth relay.
According to the technical scheme, the first relay, the second relay, the third relay and the fourth relay are arranged, so that relay control selection in different modes is realized.
As a preferred scheme of the utility model, the contact switch of fourth relay is connected with PLC and opens and stop control switch, PLC opens and stops control switch and is connected with the automatic control relay, the contact switch of automatic control relay connects in the control circuit of automatic control mode.
The technical scheme is realized, and the selection control of the automatic control mode is realized.
As a preferred scheme of utility model, the converter is connected with manual speed governing potentiometre.
By means of the technical scheme, quick speed regulation setting in a manual control mode can be achieved.
As a preferred scheme of the utility model, power supply line still is connected with limit switch, limit switch sets up in the cabinet door department of switch board, limit switch is connected with the light, the light sets up in the switch board, limit switch opens the closure in response to the switch board cabinet door.
Realize above-mentioned technical scheme, light automatic opening when can realize opening the cabinet door, light self-closing when closing the cabinet door.
As a preferred scheme of the utility model, power supply line still is connected with cooling control circuit, cooling control circuit is connected with motor tail end cooling fan, heat dissipation control circuit is including the cooling circuit breaker and the cooling relay that connect gradually.
By the technical scheme, the motor is rapidly cooled and controlled.
As a preferred scheme of the utility model, power supply line still is connected with the heat dissipation relay, the contact switch of heat dissipation relay is connected with radiator fan, radiator fan sets up in the switch board.
By means of the technical scheme, heat dissipation control in the control cabinet can be achieved.
As a preferred scheme of utility model, the PLC controller still is connected with the touch-sensitive screen.
By means of the technical scheme, touch control and parameter setting are facilitated.
As a preferred scheme of utility model, the PLC controller still is connected with the pilot lamp group.
By the technical scheme, the current control running state can be indicated.
On the other hand, the utility model provides a switch board, a serial communication port, including above-mentioned arbitrary technical scheme control system.
As described above, the utility model discloses following beneficial effect has:
the embodiment of the utility model provides a through providing a changeable frequency conversion start control system of high-power motor, when practical application, can be as required actual need, through the mode selection module, adopt power frequency control mode or frequency conversion control mode by first selection switch selection, adopt manual control mode or automatic control mode by second selection switch selection, can take the player to move-power frequency mode, manual-frequency conversion mode, automatic-power frequency mode and automatic-frequency conversion mode four kinds of control mode, thereby can satisfy different control demands, simultaneously under power frequency control mode, can realize the switching that star type starts and the operation of triangle-shaped, make motor operation control more stable.
Drawings
Fig. 1 shows a schematic circuit diagram of a frequency conversion control loop and a power frequency control loop in an embodiment of the present invention.
Fig. 2 is a schematic control diagram for controlling mode selection according to a first embodiment of the present invention.
Fig. 3 is a schematic control diagram of an intermediate frequency converter according to an embodiment of the present invention.
Fig. 4 is a schematic control diagram of a touch screen according to an embodiment of the present invention.
Fig. 5 is a front view of a control cabinet according to a second embodiment of the present invention.
The numbers and letters in the figures represent the respective part names:
1. a variable frequency master control loop; 1QF1, a first circuit breaker; 1VDF, frequency converter; 1KM1 and a first control contactor; 2. a power frequency control loop; 1QF2, second circuit breaker; 1KM11 and a second control contactor; 1KM12, a third control contactor; 1FR1, thermal relay; 1KM13 and a fourth control contactor; 3. a mode selection module; 1SA1, a first selection switch; 1SA2 and a second selection switch; 1KA1, a first relay; 1KA2, a second relay; 1KA3, a third relay; 1KA4 and a fourth relay; 31. a PLC start-stop control switch; 1KA8, an automatic control relay; 1RP, a manual speed-regulating potentiometer; QS, limit switch; HW, lighting lamp; 4. a cooling control loop; 41. a cooling fan at the tail end of the motor; 2QF1, cooling circuit breaker; 2KM1, a cooling relay; 1KA7, a heat dissipation relay; F. a heat radiation fan; 5. a touch screen; 6. 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. In addition, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are used for clarity of description only, and are not used to limit the scope of the present invention, and the relative relationship between the terms may be changed or adjusted without substantial technical changes.
Example one
Referring to fig. 1 to 4, the present embodiment provides a switchable variable frequency starting control system for a high power motor, including: frequency conversion master control circuit 1, power frequency control circuit 2, mode selection module 3 and PLC controller.
Specifically, the one end of frequency conversion main control return circuit 1 is connected in power supply circuit, the other end is connected in the motor, frequency conversion main control return circuit 1 is including the first circuit breaker 1QF1 that connects gradually, converter 1VDF, first control contactor 1KM1, converter 1VDF is used for carrying out frequency conversion control to the motor, converter 1VDF is connected with the PLC controller, can feed back current and frequency to the PLC controller with the motor under frequency conversion operational mode, still can be simultaneously at converter 1VDF and first control contactor 1KM1 connection reactor.
Power frequency control circuit 2 connects in power supply circuit, power frequency control circuit 2 is including the second circuit breaker 1QF2 that connects gradually, second control contactor 1KM11, third control contactor 1KM12, thermorelay 1FR1 and fourth control contactor 1KM13, the second control contact is connected with the motor through star type connected mode, thermorelay 1FR1 is connected with the motor through the triangle type connected mode, and thermorelay 1FR1 is connected between motor and fourth control contactor 1KM13, second circuit breaker 1QF2, second control contactor 1KM11, fourth control contactor 1KM13 forms star type start-up circuit, second circuit breaker 1QF2, second control contactor 1KM11, third control contactor 1KM12 and thermorelay 1FR1 form the triangle type operation circuit.
The mode selection module 3 is connected to a power line, and the mode selection module 3 includes: the device comprises a first selector switch 1SA1 and a second selector switch 1SA2, wherein the first selector switch 1SA1 is used for selecting a power frequency control mode or a frequency conversion control mode, and the second selector switch 1SA2 is used for selecting a manual control mode or an automatic control mode. The first selector switch 1SA1 comprises a power frequency control contact and a frequency conversion control contact, the power frequency control contact is connected with a first relay 1KA1, and the frequency conversion control contact is connected with a second relay 1KA2; the second selector switch 1SA2 comprises a manual control contact and an automatic control contact, the manual control contact is connected with a third relay 1KA3, and the automatic control contact is connected with a fourth relay 1KA4; through setting up first relay 1KA1, second relay 1KA2, third relay 1KA3 and fourth relay 1KA4, realize the relay control of different modes and select. The contact switch of the fourth relay 1KA4 is connected with a PLC start-stop control switch 31, the PLC start-stop control switch 31 is connected with an automatic control relay 1KA8, and the contact switch of the automatic control relay 1KA8 is connected in a control loop of an automatic control mode, so that the selection control of the automatic control mode is realized.
The frequency converter 1VDF and the motor are both connected to a PLC controller, and the PLC controller responds to an automatic control mode to perform automatic control according to a set control program.
The 1VDF of frequency converter is connected with manual speed governing potentiometre 1RP, can realize the quick speed governing setting under the manual control mode, and is specific, and manual speed governing potentiometre 1RP is connected in 1 VDF's the 1 st-4 th port of frequency converter, and simultaneously, the 10 th of frequency converter 1VDF, no. 11 ports still are connected with the PLC controller for realize the given speed control of PLC controller in automatic control mode.
Further, power supply line still is connected with limit switch QS, and limit switch QS sets up in the cabinet door department of switch board, and limit switch QS is connected with light HW, and light HW sets up in the switch board, and limit switch QS opens the closure in response to the switch board cabinet door to light HW automatic opening when can realize opening the cabinet door, light HW automatic closing when closing the cabinet door. And the power supply circuit is also connected with a heat dissipation relay 1KA71FR1, a contact switch of the heat dissipation relay 1KA71FR1 is connected with a heat dissipation fan F, the heat dissipation fan F is arranged in the control cabinet, heat dissipation control in the control cabinet can be realized, and the heat dissipation fan is usually arranged on two sides and/or the top of the control cabinet.
And power supply line still is connected with cooling control circuit 4, and cooling control circuit 4 is connected with motor tail end cooling fan 41, and cooling control circuit is including the cooling circuit breaker 2QF1 and the cooling relay 2KM1 that connect gradually to can realize the rapid cooling control to the motor.
Further, the PLC controller still is connected with touch-sensitive screen 5 and pilot lamp group 6, can be convenient for carry out touch control and parameter setting through touch-sensitive screen 5, through pilot lamp group 6, can instruct current control running state, pilot lamp group 6 can include power frequency operation pilot lamp 1Hg1, power frequency stop indicator lamp 1Hr1, power frequency fault indicator lamp 1Hy1, frequency conversion operation pilot lamp 1Hg2, frequency conversion stop indicator lamp 1Hr2, frequency conversion fault indicator lamp 1Hy2, motor tail end cooling fan 41 operation pilot lamp 2Hg1, motor tail end cooling fan 41 stops pilot lamp 2Hr1 etc..
In practical application, according to actual needs, the first selection switch 1SA1 selects to adopt a power frequency control mode or a frequency conversion control mode, and the second selection switch 1SA2 selects to adopt a manual control mode or an automatic control mode through the mode selection module 3, so that four control modes of the manual-power frequency mode, the manual-frequency conversion mode, the automatic-power frequency mode and the automatic-frequency conversion mode can be played, different control requirements can be met, and meanwhile, switching between star-shaped starting and triangular operation can be realized under the power frequency control mode, so that the motor operation control is more stable.
Example two
Referring to fig. 5, the present embodiment provides a control cabinet, including the control system described in the first embodiment, where the control cabinet includes a cabinet body and a cabinet door, and the first selection switch 1SA1, the second selection switch 1SA2, the manual speed-adjusting potentiometer 1RP, the touch screen 5, and the indicator light group 6 are all disposed on the cabinet door.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the 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 (10)
1. The utility model provides a changeable frequency conversion of high-power motor starts control system which characterized in that includes:
the frequency conversion main control loop comprises a first circuit breaker, a frequency converter and a first control contactor which are sequentially connected;
the power frequency control circuit is connected to a power supply circuit and comprises a second circuit breaker, a second control contactor, a third control contactor, a thermal relay and a fourth control contactor which are sequentially connected, the second control contact is connected with a motor in a star connection mode, the thermal relay is connected with the motor in a triangular connection mode, the thermal relay is connected between the motor and the fourth control contactor, the second circuit breaker, the second control contactor and the fourth control contactor form a star starting circuit, and the second circuit breaker, the second control contactor, the third control contactor and the thermal relay form a triangular operation circuit;
a mode selection module connected to a power line, the mode selection module comprising: the system comprises a first selector switch and a second selector switch, wherein the first selector switch is used for selecting a power frequency control mode or a frequency conversion control mode, and the second selector switch is used for selecting a manual control mode or an automatic control mode; and the number of the first and second groups,
and the frequency converter and the motor are connected to the PLC, and the PLC responds to the automatic control mode to perform automatic control according to a set control program.
2. The switchable variable frequency start control system of the high power motor of claim 1, wherein the first selection switch comprises a power frequency control contact and a variable frequency control contact, the power frequency control contact is connected with a first relay, and the variable frequency control contact is connected with a second relay; the second selector switch comprises a manual control contact and an automatic control contact, the manual control contact is connected with a third relay, and the automatic control contact is connected with a fourth relay.
3. The switchable variable frequency starting control system of the high-power motor according to claim 2, wherein the contact switch of the fourth relay is connected with a PLC on-off control switch, the PLC on-off control switch is connected with an automatic control relay, and the contact switch of the automatic control relay is connected in a control loop of an automatic control mode.
4. The switchable variable frequency start control system of a high power motor of claim 1, wherein the frequency converter is connected with a manual speed-adjusting potentiometer.
5. The high-power motor switchable variable-frequency starting control system as claimed in claim 1, wherein the power circuit is further connected with a limit switch, the limit switch is arranged at a cabinet door of the control cabinet, the limit switch is connected with a lighting lamp, the lighting lamp is arranged in the control cabinet, and the limit switch is closed in response to the cabinet door of the control cabinet being opened.
6. The switchable variable-frequency starting control system for the high-power motor according to claim 1, wherein a cooling control loop is further connected to the power line, the cooling control loop is connected to a cooling fan at the tail end of the motor, and the cooling control loop comprises a cooling circuit breaker and a cooling relay which are connected in sequence.
7. The switchable variable-frequency starting control system for the high-power motor according to claim 1, wherein a heat dissipation relay is further connected to the power circuit, a contact switch of the heat dissipation relay is connected with a heat dissipation fan, and the heat dissipation fan is arranged in the control cabinet.
8. The switchable variable-frequency starting control system for the high-power motor according to claim 1, wherein a touch screen is further connected to the PLC.
9. The switchable variable frequency starting control system of the high-power motor as claimed in claim 1, wherein the PLC controller is further connected with an indicator light set.
10. A control cabinet, characterized by comprising a control system according to any one of claims 1-9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222435349.0U CN218547341U (en) | 2022-09-14 | 2022-09-14 | Switchable variable-frequency starting control system and control cabinet for high-power motor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222435349.0U CN218547341U (en) | 2022-09-14 | 2022-09-14 | Switchable variable-frequency starting control system and control cabinet for high-power motor |
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| CN218547341U true CN218547341U (en) | 2023-02-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117060684A (en) * | 2023-10-11 | 2023-11-14 | 山西美锦氢能开发有限公司 | Automatic fault power frequency cutting device for high-voltage frequency converter and working method thereof |
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2022
- 2022-09-14 CN CN202222435349.0U patent/CN218547341U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117060684A (en) * | 2023-10-11 | 2023-11-14 | 山西美锦氢能开发有限公司 | Automatic fault power frequency cutting device for high-voltage frequency converter and working method thereof |
| CN117060684B (en) * | 2023-10-11 | 2024-01-05 | 山西美锦氢能开发有限公司 | Automatic fault power frequency cutting device for high-voltage frequency converter and working method thereof |
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