Crane controller with integrated structure

Abstract

The utility model relates to a crane controller with an integrated structure. The crane controller comprises a wireless communication unit, a logic control unit, a motor control unit A, a motor control unit B, a motor control unit C, a signal interface unit and a radiator. Compared with the prior art, the utility model has the advantages that: 1) the wireless communication unit, the logic control unit, the motor control unit A, the motor control unit B and the motor control unit C adopt an integrated design, the structure is compact, and the cost is low; 2) the signal interface adopts a quick plugging mode, so that the installation and the maintenance are convenient; and 3) the wireless communication unit and the logic control unit are integrated on one circuit board, the control is flexible, and the reliability is high. And 4) the motor control unit A, the motor control unit B and the motor control unit C all adopt modular design and are integrally fixed on the radiator, so that the power density is high, the size is small, and light weight is facilitated. And 5) an integrated structure design is adopted, a rapid plugging connection mode is adopted, the protection level is high, and the product life cycle is long.

Description

Technical Field

[0001] This utility model relates to the field of frequency conversion control of cranes, and in particular to a crane controller with an integrated structure. Background Technology

[0002] Cranes, as core equipment of heavy machinery, play an indispensable role in the national economy. Widely used in large-scale projects such as ports, bridges, power plants, and high-rise buildings, cranes are the backbone of infrastructure construction. Their efficiency and reliability directly determine project progress and cost control. In manufacturing, cranes are used for material handling on production lines; in logistics, port cranes are key nodes in global trade, and their level of automation directly affects cargo throughput capacity.

[0003] In existing technology, the lifting and traveling of cranes are carried out by using an electrical control cabinet composed of a general-purpose frequency converter, an air switch, an AC contactor, an intermediate relay, and an isolation transformer. The receiver of an industrial wireless remote controller is connected to the outside of the electrical control cabinet.

[0004] The existing technology has the following drawbacks: 1. The electrical control cabinet is large, has high manufacturing costs, and is not conducive to the overall lightweight design of the crane. 2. The internal wiring of the electrical control cabinet is complex, resulting in high production costs and low product reliability. 3. The electrical control cabinet generally uses gland connectors to connect to external signals, resulting in low protection levels and high installation and maintenance costs. 4. Logic control is implemented using AC contactors and intermediate relay circuits, resulting in numerous internal wiring connections, a large cabinet size, and low reliability. Summary of the Invention

[0005] To address the problems existing in the prior art, this utility model provides an integrated crane controller, including a wireless communication unit, a logic control unit, a motor control unit A, a motor control unit B, a motor control unit C, a signal interface unit, and a heat sink. The key feature is that the wireless communication unit and the logic control unit are integrated on a single control circuit board (4), and the motor control units A (1), B (2), and C (3) are all integrated and fixed to the heat sink (5).

[0006] To achieve the above objectives, this utility model employs the following technical solution:

[0007] The wireless communication unit and logic control unit are designed to be integrated on a control circuit board (4), which is fixed to the upper layer of the motor control unit A (1) control module by an insulating isolation plate (9).

[0008] The motor control unit A (1), motor control unit B (2), and motor control unit C (3) are designed as an integrated structure and are all fixed on the same heat sink (5).

[0009] The signal interface unit (7) is fixed to the housing (8) of the controller using a quick-plug connector.

[0010] The bottom of the radiator (5) is equipped with a fan (6) to achieve forced ventilation cooling of the crane controller with an integrated structure.

[0011] The logic control unit includes input signals and output signals implemented using optocoupler circuits, relay circuits, Modbus-RTU 485 communication circuits, CAN communication circuits, CANopen, CANlink, or Profbus-DP communication circuits.

[0012] The wireless communication unit uses a center frequency range of 433 to 470 MHz to realize wireless communication with the controller.

[0013] The motor control unit A, motor control unit B, and motor control unit C all include converters that convert AC to DC and DC to AC to control permanent magnet motors or AC asynchronous motors.

[0014] The logic control unit includes control of the crane motor brake, overspeed limit switch, rotation limit switch, and overload limit switch.

[0015] Compared with the prior art, the advantages of this utility model are:

[0016] 1) The wireless communication unit, logic control unit, motor control unit A, motor control unit B, and motor control unit C adopt an integrated structure design, which is compact and low in cost.

[0017] 2) The signal interface adopts a quick-plug method, which is convenient for installation and maintenance, and has low manufacturing and installation costs.

[0018] 3) The wireless communication and logic control unit are integrated on a single circuit board, which is simple in structure, flexible in control, and highly reliable.

[0019] 4) Motor control unit A, motor control unit B, and motor control unit C all adopt a modular design and are integrated and fixed on the heat sink. They have high power density, small size, and are conducive to weight reduction.

[0020] 5) The controller features an integrated structure design with a quick-plug connection, high protection level, and long product life cycle. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the internal structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the overall side view structure of this utility model;

[0023] Figure 3 This is a schematic diagram of the overall top view structure of this utility model;

[0024] Figure 4 This is a schematic diagram of the motor control unit of this utility model.

[0025] In the diagram: 1-Motor control unit A, 2-Motor control unit B, 3-Motor control unit C, 4-Integrated control unit for wireless communication and logic, 5-Heat sink, 6-Cooling fan, 7-Signal interface unit, 8-Controller housing, 9-Insulating shield, 101-Power switching device, 102-AC / DC converter control board, 103-Power relay, 104-DC support capacitor Detailed Implementation

[0026] The technical content of this utility model will be further described in detail below with reference to the accompanying drawings.

[0027] See Figure 1 , Figure 2 , Figure 3 This is a schematic diagram of the integrated crane controller of this utility model, which includes a motor control unit A (1), a motor control unit B (2), a motor control unit C (3), a signal interface unit (7), a heat sink (5), a wireless communication unit, and a logic control unit integrated control circuit board (4).

[0028] See Figure 1 The wireless communication unit and logic control unit are integrated into a control circuit board (4). This circuit board is fixed on the upper layer of the motor control unit A (1) control module through an insulating isolation plate (9). It has a simple structure, flexible control, and high reliability.

[0029] See Figure 1 The logic control unit in the control circuit board (4) includes input signals and output signals implemented using optocoupler circuits, relay circuits, Modbus-RTU 485 communication circuits, CAN communication circuits, CANopen, CANlink, or Profbus-DP communication circuits. The logic control unit includes control of the motor brake required by the crane, overspeed limit switch control, rotation limit switch, and overload limit switch.

[0030] See Figure 1The wireless communication unit in the control circuit board (4) adopts a wireless communication center frequency range of 433~470MHz to realize the wireless communication of the controller. After receiving the control signal, the wireless communication unit controls the operation of the motor control unit A (1), the motor control unit B (2) and the motor control unit C (3) through the logic control unit.

[0031] See Figure 1 The operating status signals of motor control unit A (1), motor control unit B (2) and motor control unit C (3) are transmitted to the signal receiving end of crane monitoring equipment through the wireless communication unit in control circuit board (4) to realize status display and monitoring.

[0032] See Figure 1 , Figure 2 , Figure 3 Motor control units A(1), B(2), and C(3) adopt a modular design with an integrated structure and are uniformly fixed on the heat sink (5). They have high power density, small size, and are conducive to weight reduction. Each motor control unit includes a converter for converting AC to DC and a converter for converting DC to AC. Through control algorithms, the control of the crane's lifting AC asynchronous motor or permanent magnet motor is realized, as well as the control of the crane's traveling AC asynchronous motor or permanent magnet motor is realized.

[0033] See Figure 1 , Figure 3 The signal interface unit (7) is fixed to the controller housing (8) using a quick-plug connector. This facilitates installation and maintenance, and reduces manufacturing and installation costs.

[0034] See Figure 1 , Figure 3 The controller housing (8) is directly fixed to the heat sink (5), and a fan (6) is installed at the bottom of the heat sink (5) to achieve forced ventilation cooling of the integrated crane controller. The entire controller adopts an integrated structure design, with a high protection level and a long product life cycle.

[0035] See Figure 4Each motor control unit includes an AC-to-DC converter and a DC-to-AC converter module. The power switching device (101) of the converter module is directly fixed on the heat sink (5), which is cooled by forced ventilation through a fan (6) mounted at the bottom. The AC / DC / DC / AC converter control board (102) integrates software control algorithms to control the crane lifting AC asynchronous motor or permanent magnet motor, control the crane traveling AC asynchronous motor or permanent magnet motor, and control the zero-speed hovering and zero-speed braking of each motor. The DC support capacitor (104) mainly undertakes the following key functions: filtering and smoothing DC voltage, energy storage and energy buffering, suppressing voltage surges and spikes, absorbing harmonic currents, and maintaining constant bus voltage.

Claims

1. Crane controller of an integrated construction, comprising a wireless communication unit, a logic control unit, a motor control unit A, a motor control unit B, a motor control unit C, a signal interface unit, a heat sink, characterized in that The wireless communication unit and logic control unit are designed to be integrated on a control circuit board (4). The motor control unit A (1), motor control unit B (2), and motor control unit C (3) are designed as an integrated structure and are all fixed on the heat sink (5).

2. The integrated structure crane controller of claim 1, wherein, The logic control unit includes input signals and output signals implemented using optocoupler circuits.

3. The integrated structure crane controller of claim 1, wherein, The logic control unit includes input signals and output signals implemented using relay circuits.

4. The crane controller with an integrated structure according to claim 1, characterized in that, The logic control unit includes input signals and output signals implemented using a CAN communication circuit.

5. The integrated structure crane controller of claim 1, wherein, The logic control unit includes input signals, and the output signals are implemented using Modbus-RTU 485 communication circuits.

6. The integrated structure crane controller of claim 1, wherein, The logic control unit includes input signals and output signals implemented using CANopen, CANlink, or Profbus-DP communication circuits.

7. The integrated structure crane controller of claim 1, wherein, The wireless communication unit includes a center frequency range of 433 to 470 MHz for wireless communication.

8. The integrated structure crane controller of claim 1, wherein, The motor control unit A(1) includes an AC-to-DC converter and a DC-to-AC converter.

9. The integrated structure crane controller of claim 1, wherein, The motor control unit A(1) includes a converter that converts direct current to alternating current.

10. The integrated structure crane controller of claim 1, wherein, The motor control unit B(2) includes an AC-to-DC converter and a DC-to-AC converter.

11. The integrated structure crane controller of claim 1, wherein, The motor control unit B(2) includes a converter that converts direct current to alternating current.

12. The integrated structure crane controller of claim 1, wherein, The motor control unit C(3) includes an AC-to-DC converter and a DC-to-AC converter.

13. The integrated structure crane controller of claim 1, wherein, The motor control unit C(3) includes a converter that converts direct current to alternating current.

14. The integrated structure crane controller of claim 1, wherein, The motor control unit A(1) includes the control of an AC asynchronous motor.

15. The integrated structure crane controller of claim 1, wherein, The motor control unit A(1) includes the control of the permanent magnet motor.

16. The integrated structure crane controller of claim 1, wherein, The motor control unit B(2) includes the control of an AC asynchronous motor.

17. The integrated structure crane controller of claim 1, wherein, The motor control unit B(2) includes the control of the permanent magnet motor.

18. The integrated structure crane controller of claim 1, wherein, The motor control unit C(3) includes the control of an AC asynchronous motor.

19. The integrated structure crane controller of claim 1, wherein, The motor control unit C(3) includes the control of the permanent magnet motor.

20. The integrated structure crane controller of claim 1, wherein, The signal interface unit is implemented using a quick-plug connector.

21. The integrated structure crane controller of claim 1, wherein, The bottom of the radiator (5) is equipped with a fan (6) to achieve forced ventilation cooling of the crane controller with an integrated structure.

22. The integrated structure crane controller of claim 1, wherein, After receiving the control signal, the wireless communication unit controls the operation of motor control unit A, motor control unit B, and motor control unit C through the logic control unit.

23. The integrated structure crane controller of claim 1, wherein, The operating status signals of motor control unit A, motor control unit B, and motor control unit C are transmitted to the crane's monitoring signal receiver via a wireless communication unit, enabling the crane's status display and monitoring.

24. The integrated structure crane controller of claim 1, wherein, The logic control unit includes control of the motor brake.

25. The integrated structure crane controller of claim 1, wherein, The logic control unit includes overspeed limiter control for the crane.

26. The integrated structure crane controller of claim 1, wherein, The logic control unit includes control of the crane's rotation limit switch.

27. The integrated structure crane controller of claim 1, wherein, The logic control unit includes overload limit switch control for the crane.

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