CN202575741U - Variable frequency traveling control system - Google Patents
Variable frequency traveling control system Download PDFInfo
- Publication number
- CN202575741U CN202575741U CN 201220105144 CN201220105144U CN202575741U CN 202575741 U CN202575741 U CN 202575741U CN 201220105144 CN201220105144 CN 201220105144 CN 201220105144 U CN201220105144 U CN 201220105144U CN 202575741 U CN202575741 U CN 202575741U
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- China
- Prior art keywords
- walking
- plc
- traveling
- frequency converter
- movable motor
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- Expired - Lifetime
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Abstract
The utility model provides a variable frequency traveling control system, which comprises a control cabinet, traveling motors and traveling motor brakes. A programmable logic controller (PLC) and a frequency converter are arranged in the control cabinet. A handle is arranged outside the control cabinet. The signal input end of the PLC is connected with the handle through a wire. An output signal of the PLC is transmitted to the traveling motors through the frequency converter. The frequency converter is connected with a 380V three-phase power supply through a traveling main power air switch. An automatic resistor is also connected to the frequency converter. The output end of the PLC is also connected with the traveling motor brakes through a traveling brake contactor which is connected with the 380V three-phase power supply through a traveling brake power switch. The input end of a traveling transformer is connected with the 380V three-phase power supply through a traveling transformer power switch, and the output end of the traveling transformer is connected with the PLC through a traveling power switch. According to the system, a traveling mechanism can be stably started and stopped, the stable running of the mechanism can be ensured, and the system is more convenient to operate and maintain.
Description
Technical field
The utility model relates to a kind of walking frequency-changing control system, particularly a kind of automation control system that is used to control the tower crane walking.
Background technology
Along with Chinese economic development, harbour, power plant and existing heavy construction building present the situation of great development, and this situation is more and more to the demand of walking hoisting crane, so the degree of stability of walking crane control system is most important.
In the prior art; The travel controls of hoisting crane is to realize speed governing and braking through motor pole number that changes contactless switch and the power of controlling two drgs; This control method is in the startup of mechanism and very big to the impact of mechanism when out of service, causes motor overheating easily, burns or the damage of mechanism's connecting bridge.
Summary of the invention
The purpose of the utility model provides a kind of walking frequency-changing control system, can realize the smooth starting of traveling gear and stops, and guarantees the smooth running of mechanism, and more convenient on operation and maintenance.
The technical scheme of the invention: walking frequency-changing control system; Comprise control housing; Movable motor (TM1-TM4) and movable motor drg (TZ1-TZ2) are provided with PLC and frequency converter G401 in the control housing, control housing is provided with handle XT outward; The signal input part of PLC is connected with handle XT through lead; The output signal of PLC is transported to movable motor (TM1-TM4) via frequency converter G401, and frequency converter G401 is connected with three phase mains 380V through walking main power air switch Q401, also is connected to automatic resistance BR on the frequency converter G401; The mouth of PLC also is connected with movable motor drg (TZ1-TZ2) via walking drg contactless switch K401, and walking drg contactless switch K401 is connected with three phase mains 380V through walking drg source switch Q403; The input end of walking voltage transformer T401 is connected with three phase mains 380V through walking transformer frequency response switch Q404, and the mouth of walking voltage transformer T401 is connected with PLC through walking source switch Q405.
On the described connection line that is made up of frequency converter G401 and movable motor (TM1-TM4), be provided with thermal relay (Q441-Q444), thermal relay (Q441-Q444) is connected between frequency converter G401 and the movable motor (TM1-TM4).
Movable motor (TM1-TM4) is provided with walking blower fan (TMF1-TMF4), and walking blower fan (TMF1-TMF4) is connected with three phase mains 380V through movable motor fan power supply switch Q402.
Also be connected with walking limit switch STA on the said PLC, walking limit switch STA and handle together are arranged on the outside of control housing.
The top of described control housing is provided with suspension ring, and the below is provided with wire hole, and the side is provided with exhaust fan, and the set inside of control housing has the components and parts adapter plate.
The beneficial effect of the utility model:
1. owing in system, adopted PLC and frequency converter, realized the smooth starting of crane travelling gear and out of service, avoided the impact of traveling gear in operation.2. owing on the described connection line that constitutes by frequency converter G401 and movable motor (TM1-TM4), be provided with thermal relay (Q441-Q444) and on movable motor (TM1-TM4), be provided with the blower fan (TMF1-TMF4) of walking, can avoid causing traveling gear to burn or damaging because of motor overheating.3. owing on said PLC, also be connected with walking limit switch STA, limit switch STA can guarantee the safe within the specific limits normal operation of movable motor (TM1-TM4).
Description of drawings
Fig. 1 is the systematic schematic diagram of the utility model.
Fig. 2 is the schematic circuit diagram of the utility model movable motor control loop.
Fig. 3 is the schematic circuit diagram of the utility model walking blower fan, walking drg and walking voltage transformer.
Fig. 4 is the structural representation of the utility model control housing.
The specific embodiment
Extremely shown in Figure 3 like Fig. 1; The walking frequency-changing control system comprises control housing (5), movable motor (TM1-TM4) and movable motor drg (TZ1-TZ2); It is characterized in that: be provided with PLC and frequency converter G401 in the control housing (5); The outer handle XT that is provided with of control housing (5), the signal input part of PLC is connected with handle XT through lead, and the output signal of PLC is transported to movable motor (TM1-TM4) via frequency converter G401; Frequency converter G401 is connected with three phase mains 380V through walking main power air switch Q401, also is connected to automatic resistance BR on the frequency converter G401; The mouth of PLC also is connected with movable motor drg (TZ1-TZ2) via walking drg contactless switch K401, and walking drg contactless switch K401 is connected with three phase mains 380V through walking drg source switch Q403; The input end of walking voltage transformer T401 is connected with three phase mains 380V through walking transformer frequency response switch Q404, and the mouth of walking voltage transformer T401 is connected with PLC through walking source switch Q405.
On the described connection line that is made up of frequency converter G401 and movable motor (TM1-TM4), be provided with thermal relay (Q441-Q444), thermal relay (Q441-Q444) is connected between frequency converter G401 and the movable motor (TM1-TM4).
Movable motor (TM1-TM4) is provided with walking blower fan (TMF1-TMF4), and walking blower fan (TMF1-TMF4) is connected with three phase mains 380V through movable motor fan power supply switch Q402.
Also be connected with walking limit switch STA on the said PLC, walking limit switch STA and handle together are arranged on the outside of control housing (5).
As shown in Figure 4, the top of described control housing (5) is provided with suspension ring (1), and the below is provided with wire hole (4), and the side is provided with exhaust fan (2), and the set inside of control housing (5) has components and parts adapter plate (3).
Working process: the travel controls handle that operating personal is handled on the control housing sends control command; Control command is sent to PLC; At this moment PLC begins to carry out logic determines through inside programming; When whole running gear is under the safe in operation situation; PLC output control signal corresponding also is sent to frequency converter G401 to signal, output frequency, speed and the voltage of frequency converter G401 change signal after receiving direction that PLC sends and speed signal, and the signal after the change flows to movable motor (TM1-TM4) via thermal relay (Q441-Q444).Simultaneously, movable motor drg (TZ1-TZ2) is controlled the adhesive of walking drg contactless switch K401 and is broken off the start-stop that cooperates movable motor (TM1-TM4) through PLC.
Claims (5)
1. walking frequency-changing control system; Comprise control housing (5); Movable motor (TM1-TM4) and movable motor drg (TZ1-TZ2) is characterized in that: be provided with PLC and frequency converter G401 in the control housing (5), the outer handle XT that is provided with of control housing (5); The signal input part of PLC is connected with handle XT through lead; The output signal of PLC is transported to movable motor (TM1-TM4) via frequency converter G401, and frequency converter G401 is connected with three phase mains 380V through walking main power air switch Q401, is connected to automatic resistance BR on the frequency converter G401; The mouth of PLC also is connected with movable motor drg (TZ1-TZ2) via walking drg contactless switch K401, and walking drg contactless switch K401 is connected with three phase mains 380V through walking drg source switch Q403; The input end of walking voltage transformer T401 is connected with three phase mains 380V through walking transformer frequency response switch Q404, and the mouth of walking voltage transformer T401 is connected with PLC through walking source switch Q405.
2. walking frequency-changing control system as claimed in claim 1; It is characterized in that: on the described connection line that is made up of frequency converter G401 and movable motor (TM1-TM4), be provided with thermal relay (Q441-Q444), thermal relay (Q441-Q444) is connected between frequency converter G401 and the movable motor (TM1-TM4).
3. walking frequency-changing control system as claimed in claim 2; It is characterized in that: movable motor (TM1-TM4) is provided with walking blower fan (TMF1-TMF4), and walking blower fan (TMF1-TMF4) is connected with three phase mains 380V through movable motor fan power supply switch Q402.
4. walking frequency-changing control system as claimed in claim 3 is characterized in that: also be connected with walking limit switch STA on the said PLC, walking limit switch STA and handle XT together are arranged on the outside of control housing (5).
5. walking frequency-changing control system as claimed in claim 1; It is characterized in that: the top of described control housing (5) is provided with suspension ring (1); The below is provided with wire hole (4), and the side is provided with exhaust fan (2), and the set inside of control housing (5) has components and parts adapter plate (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220105144 CN202575741U (en) | 2012-03-20 | 2012-03-20 | Variable frequency traveling control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220105144 CN202575741U (en) | 2012-03-20 | 2012-03-20 | Variable frequency traveling control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202575741U true CN202575741U (en) | 2012-12-05 |
Family
ID=47245177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220105144 Expired - Lifetime CN202575741U (en) | 2012-03-20 | 2012-03-20 | Variable frequency traveling control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202575741U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109459973A (en) * | 2018-11-16 | 2019-03-12 | 曹妃甸港集团股份有限公司 | Walking conversion control circuit and control method under door machine machine |
| CN109505792A (en) * | 2018-11-16 | 2019-03-22 | 曹妃甸港集团股份有限公司 | A kind of raising cabinet internal fan control circuit and control method for fan |
-
2012
- 2012-03-20 CN CN 201220105144 patent/CN202575741U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109459973A (en) * | 2018-11-16 | 2019-03-12 | 曹妃甸港集团股份有限公司 | Walking conversion control circuit and control method under door machine machine |
| CN109505792A (en) * | 2018-11-16 | 2019-03-22 | 曹妃甸港集团股份有限公司 | A kind of raising cabinet internal fan control circuit and control method for fan |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121205 |