CN220857637U - Electrical control device of elevator - Google Patents
Electrical control device of elevator Download PDFInfo
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- CN220857637U CN220857637U CN202322582372.7U CN202322582372U CN220857637U CN 220857637 U CN220857637 U CN 220857637U CN 202322582372 U CN202322582372 U CN 202322582372U CN 220857637 U CN220857637 U CN 220857637U
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Abstract
The utility model discloses an electric control device of a hoisting machine, wherein the output end of an arranged incoming line unit ALC is connected with the input end of a filtering unit AIM, the output end of the incoming line unit ALC is connected with the input end of an active rectifying unit ALM, the output end of the incoming line unit ALC is connected with the input end of an inversion unit MMI, and the output end of the incoming line unit ALC is connected with a three-phase asynchronous motor. On a direct current bus connected with an active rectifying unit ALM and an inverting unit MMI, a braking unit BKM is connected in parallel, and the braking unit is externally connected with a braking resistor BKR; the control signal of the PLC control system is connected with the control signal of the main loop. The device can work by switching a power supply mode through a PLC control system, in the power supply mode of a power grid, a brake unit BKM and a brake resistor BKR are forbidden to work, an inversion unit executes a four-quadrant working mode, and energy is directly fed back to the power grid; in the generator set mode, the braking unit BKM and the braking resistor BKR start to work, the inversion unit executes a single-quadrant working mode, reverse power can be automatically absorbed, and correct and reliable operation of the elevator and the generator set is guaranteed.
Description
Technical Field
The utility model relates to the field of electric control equipment of mine hoists, in particular to an electric control device of a hoist used in a switching mode of an industrial power grid and a generator set.
Background
Mine lifts are throat devices of mines, where traffic can lifts are the primary load in the mine. For traffic tank elevators, 3 power supplies are typically configured, 2 of which come from the industrial grid of the mine and 3 rd from the generator set.
The mine hoist is a large lifting mechanical device, a motor drives a host machine to roll and rotate, and a steel wire rope on a roller is used for driving a container to lift in a shaft, so that a conveying task is completed. Mine hoists are potential energy loads, and for hoist control systems, the system must be capable of four-quadrant operation, and energy must be fed back. The industrial power grid of a mine generally has a relatively large short-circuit capacity, relatively small grid fluctuations, and allows energy to be fed back to the power grid. But the generator set power grid has small short-circuit capacity and large power grid fluctuation, and the energy feedback to the generator set is forbidden, so that the problem of energy feedback when the generator set works can not be realized.
Disclosure of utility model
Aiming at the problems in the field, the utility model provides an electric control device for a lifting machine, which can solve the technical problem that energy feedback can not be realized when a generator set works.
In order to solve the technical problems, the utility model discloses an electric control device of a lifter, which comprises an incoming line unit ALC, a filtering unit AIM, an active rectifying unit ALM, an inversion unit MMI, a braking unit BKM, a PLC control system and a three-phase asynchronous motor MT;
The output end of the wire inlet unit ALC is connected with the input end of the filtering unit AIM, the output end of the filtering unit AIM is connected with the input end of the active rectifying unit ALM, the output end of the active rectifying unit ALM is connected with the input end of the inversion unit MMI, and the output end of the inversion unit MMI is connected with the three-phase asynchronous motor MT; the PLC control system is respectively connected with signals of the line incoming unit ALC, the filtering unit AIM, the active rectifying unit ALM, the inverting unit MMI and the braking unit BKM;
The braking unit BKM is connected in parallel to a direct current bus connected with the active rectifying unit ALM and the inverting unit MMI, and is externally connected with a braking resistor BKR;
When the power grid is in operation in an industrial power grid mode, the brake unit BKM and the brake resistor BKR are forbidden to operate, the four-quadrant operation mode is executed through the inversion unit MMI, and energy is directly fed back to the power grid; when in the generator set mode, the braking unit BKM and the braking resistor BKR start to work, the inversion unit MMI executes a single-quadrant working mode, and energy is directly consumed on the braking resistor BKR.
Preferably, the PLC control system comprises a low-voltage power supply APG, an operation table CD, a control cabinet PLC, a control signal SG and a human-computer interface PL; the low-voltage power supply APG respectively provides control power for the operation desk CD, the control cabinet PLC, the control signal SG, the man-machine interface PL, the incoming line unit ALG, the filtering unit AIM, the active rectifying unit ALM, the inversion unit MMI and the braking unit BKM; the control signal SG is respectively connected with control signals of the low-voltage power supply APG, the operation console CD, the man-machine interface PL, the incoming line unit ALG, the filtering unit AIM, the active rectifying unit ALM, the inverting unit MMI and the braking unit BKM.
Preferably, the control signal SG includes an input control signal and an output control signal.
Preferably, the active rectifying unit AIM and the inverting unit MMI are connected through a common dc bus on a dc bus, and the dc bus is connected with the braking unit BKM and the braking resistor BKR.
Preferably, a control signal of the active rectifying unit AIM is connected with the control cabinet PLC to control the active rectifying unit AIM to be turned on or off, and to enable or disable electrical feedback.
Preferably, a control signal of the brake unit BKM is connected with the control cabinet PLC, and controls the brake unit to prohibit or start working.
Preferably, the braking current of the braking resistor BKR is required to meet the power requirement when the elevator brakes at full speed and full load.
Preferably, the three-phase asynchronous motor is a 3AC380V or 690V low-voltage asynchronous motor.
Compared with the prior art, the utility model has the following beneficial effects:
according to the utility model, the power supply mode of the power grid or the power supply mode of the generator set is switched through the PLC control system to work, under the power supply mode of the power grid, the brake unit BKM and the brake resistor BKR are forbidden to work, the inversion unit MMI executes a four-quadrant working mode, the four-quadrant working of the system is promoted, and energy is directly fed back to the power grid, so that energy consumption is greatly reduced; in the generator set mode, the braking unit BKM and the braking resistor BKR start to work, the inversion unit MMI executes a single-quadrant working mode, the four-quadrant working of the lifting system is improved, energy is not fed back to the generator set, the energy is directly consumed on the braking resistor BKR, and reliable operation of the lifting machine and the generator set is guaranteed. The device is convenient to switch working modes under the industrial power grid and the generator set, and can be widely applied to industries such as mines.
Drawings
FIG. 1 is a schematic diagram of an overall device frame of the present utility model;
FIG. 2 is a schematic diagram of an active filter module according to the present utility model;
FIG. 3 is a schematic diagram of an active rectifier module according to the present utility model;
fig. 4 is a schematic diagram of an inverter unit module according to the present utility model;
Fig. 5 is a schematic diagram of a brake unit and a brake resistor module according to the present utility model.
Detailed Description
The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to fig. 1 to 5 in the embodiments of the present utility model. It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.
Examples
As shown in fig. 1, the embodiment of the utility model provides an electrical control device of a lifter, which comprises an incoming line unit ALC, a filtering unit AIM, an active rectifying unit ALM, an inversion unit MMI, a braking unit BKM, a PLC control system and a three-phase asynchronous motor MT;
The output end of the wire inlet unit ALC is connected with the input end of the filtering unit AIM, the output end of the filtering unit AIM is connected with the input end of the active rectifying unit ALM, the output end of the active rectifying unit ALM is connected with the input end of the inversion unit MMI, the output end of the inversion unit MMI is connected with the three-phase asynchronous motor, and the output end of the PLC control system is connected with the input end of the wire inlet unit ALC. The active rectifying unit can control the active rectifying unit to start or inhibit an electric feedback function through a PLC control system.
The braking unit BKM is connected in parallel to a direct current bus connected with the active rectifying unit ALM and the inverting unit MMI, the braking unit BKM is externally connected with a braking resistor BKR, and the braking current of the braking resistor BKR meets the power requirement of the elevator during full-speed full-load braking, so that the reliable operation of the elevator and the generator set is ensured. The brake unit BKM may control its prohibiting or starting operation by a PLC control system.
When the power grid works in the industrial power grid mode, the brake unit BKM and the brake resistor BKR are forbidden to work, the four-quadrant working mode is executed through the MMI, and energy is directly fed back to the power grid; when the generator set is in the generator set mode, the braking unit BKM and the braking resistor BKR start to work, the inversion unit MMI executes the single-quadrant working mode, and energy is directly consumed on the braking resistor BKR.
The PLC control system comprises a low-voltage power supply APG, an operation table CD, a control cabinet PLC, a control signal SG and a human-computer interface PL. The control power supply is respectively provided for the operation desk CD, the control cabinet PLC, the control signal SG, the man-machine interface PL, the incoming line unit ALG, the filtering unit AIM, the active rectifying unit ALM, the inverting unit MMI and the braking unit BKM. All control signals of the power supply APG, the operation table CD, the man-machine interface PL, the incoming line unit ALG, the filtering unit AIM, the active rectifying unit ALM, the inverting unit MMI and the braking unit BKM are connected with the control signal SG for signal transmission. The active rectifying unit is connected with the P control cabinet LC and controls the active rectifying unit ALM to be switched on or off, and the electric feedback is allowed or forbidden. The brake unit is connected with the control cabinet PLC and controls the brake unit BKM to prohibit or start working.
The control cabinet PLC comprises three main parts: PLC host, input/output module and other electrical components. The PLC host is a core component of the control cabinet and is also a central processing unit responsible for managing control programs and logic functions of the whole system. The input/output module is responsible for inputting signals of the external equipment into the control cabinet PLC and outputting signals sent out by the control cabinet PLC to the external equipment.
The control signal SG comprises an input control signal and an output control signal, the input control signal transmits the received signal to the control cabinet PLC, and the output control signal outputs the program control signal of the control cabinet PLC to other external equipment to control the normal operation of the control cabinet PLC.
The active rectifying unit AIM and the inverting unit MMI are connected through a public direct current bus on the direct current busbar, the direct current busbar is connected with the braking unit BKM and the braking resistor BKR, the braking unit BKM and the braking resistor BKR start to work in a generator set mode, the inverting unit MMI is switched into a single-quadrant working mode, the system can automatically absorb reverse power, and correct and reliable operation of the elevator and the generator set is guaranteed.
The three-phase asynchronous motor is a 3AC380V or 690V low-voltage asynchronous motor. Compared with a single-phase asynchronous motor, the three-phase asynchronous motor has good running performance and can save various materials.
The active filtering module shown in fig. 2 comprises a pre-charging loop and an incoming line filter, wherein the pre-charging loop comprises a charging contactor, a charging resistor and a charging bypass contactor. The active filtering module receives a pre-charging instruction from the active rectifying module, switches on the charging contactor and the charging resistor to charge the active rectifying module, and switches off the charging instruction and switches on the bypass instruction after the common DC bus voltage rises to a required threshold value, so that the active rectifying circuit starts to work.
The active rectifier module shown in fig. 3 is mainly an IGBT three-phase fully-controlled rectifier bridge, and converts the three-phase ac power from the active filter circuit into dc power of a common dc bus. When the industrial power grid supplies power, the active rectifying module is controlled by the control cabinet PLC to be switched into a four-quadrant mode to work, and the electric energy is directly fed back to the power grid; when the generator set supplies power, the active rectifying module is controlled by the control cabinet PLC to be switched into a single-quadrant mode to work, and the electric energy is forbidden to be fed back to the generator set.
The inverter unit module shown in fig. 4 is mainly an IGBT three-phase full-control bridge, converts direct current from a common direct current bus into three-phase alternating current, and drives a three-phase asynchronous motor to operate.
As shown in fig. 5, the braking unit BKM and the braking resistor BKR are connected in parallel to a common dc bus, and are externally connected with the braking resistor BKR. When the industrial power grid supplies power, the brake unit BKM is controlled by the PLC to inhibit working, and the electric energy is directly fed back to the power grid through the active rectifying module; when the generator set supplies power, the brake unit BKM is controlled to work through the PLC, and electric energy is consumed on the brake resistor BKR through the brake unit BKM.
The utility model can conveniently switch working modes under the industrial power grid and the generator set, so that the whole device can safely and reliably work. The vector adjustment AC-DC-AC frequency conversion technology is adopted, and the power grid power supply or the power generator set power supply mode is switched to work through the PLC control system according to the condition that the power supply loop supplies power to the power grid or the power generator set power supply:
Under the working of an industrial power grid mode, the system can feed back to the power grid, and the speed is regulated accurately and steplessly, so that energy is saved and consumption is reduced greatly; under the working of the generator set mode, the system can automatically absorb reverse power, and correct and reliable operation of the elevator and the generator set is ensured. The operation stability of the whole power supply loop is ensured, the later maintenance is convenient, and the method can be widely applied to industries such as mines.
The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.
Claims (8)
1. The electric control device of the elevator is characterized by comprising an incoming line unit ALC, a filtering unit AIM, an active rectifying unit ALM, an inversion unit MMI, a braking unit BKM, a PLC control system and a three-phase asynchronous motor MT;
The output end of the wire inlet unit ALC is connected with the input end of the filtering unit AIM, the output end of the filtering unit AIM is connected with the input end of the active rectifying unit ALM, the output end of the active rectifying unit ALM is connected with the input end of the inversion unit MMI, and the output end of the inversion unit MMI is connected with the three-phase asynchronous motor MT; the PLC control system is respectively connected with signals of the line incoming unit ALC, the filtering unit AIM, the active rectifying unit ALM, the inverting unit MMI and the braking unit BKM;
The braking unit BKM is connected in parallel to a direct current bus connected with the active rectifying unit ALM and the inverting unit MMI, and is externally connected with a braking resistor BKR;
When the power grid is in operation in an industrial power grid mode, the brake unit BKM and the brake resistor BKR are forbidden to operate, the four-quadrant operation mode is executed through the inversion unit MMI, and energy is directly fed back to the power grid; when in the generator set mode, the braking unit BKM and the braking resistor BKR start to work, the inversion unit MMI executes a single-quadrant working mode, and energy is directly consumed on the braking resistor BKR.
2. The elevator electrical control device of claim 1, wherein the PLC control system comprises a low voltage power supply APG, an operator station CD, a control cabinet PLC, a control signal SG, and a human-machine interface PL; the low-voltage power supply APG respectively provides control power for the operation desk CD, the control cabinet PLC, the control signal SG, the man-machine interface PL, the incoming line unit ALG, the filtering unit AIM, the active rectifying unit ALM, the inversion unit MMI and the braking unit BKM; the control signal SG is respectively connected with control signals of the low-voltage power supply APG, the operation console CD, the man-machine interface PL, the incoming line unit ALG, the filtering unit AIM, the active rectifying unit ALM, the inverting unit MMI and the braking unit BKM.
3. An electrical control device for a hoisting machine according to claim 2, characterized in that the control signal SG comprises an input control signal and an output control signal.
4. An electrical control device for a hoisting machine according to claim 3, characterized in that the active rectifying unit AIM and the inverting unit MMI are connected by a common dc bus on a dc bus, and that the dc bus is connected to the braking unit BKM and the braking resistor BKR.
5. The elevator electric control device according to claim 4, wherein the control signal of the active rectifying unit ALM is connected to the control cabinet PLC, and controls the active rectifying unit AIM to be turned on or off, and allows or prohibits electric feedback.
6. The electrical control device for the elevator according to claim 5, wherein a control signal of the brake unit BKM is connected with the control cabinet PLC to control the brake unit to prohibit or activate.
7. The electrical control device of claim 6, wherein the braking current of the brake resistor BKR is required to meet the power requirement of the elevator during full-speed full-load braking.
8. An electrical control device for a hoisting machine as claimed in claim 7, characterized in that the three-phase asynchronous motor is a 3AC380V or 690V low-voltage asynchronous motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322582372.7U CN220857637U (en) | 2023-09-22 | 2023-09-22 | Electrical control device of elevator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322582372.7U CN220857637U (en) | 2023-09-22 | 2023-09-22 | Electrical control device of elevator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220857637U true CN220857637U (en) | 2024-04-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322582372.7U Active CN220857637U (en) | 2023-09-22 | 2023-09-22 | Electrical control device of elevator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220857637U (en) |
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2023
- 2023-09-22 CN CN202322582372.7U patent/CN220857637U/en active Active
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