Rectification adjusting system for excitation winding of direct-current motor of electric shovel

Abstract

The utility model discloses a rectification adjusting system for an excitation winding of an electric shovel direct current motor, a motor armature Hall current sensor inputs a collected main loop current signal of the electric shovel direct current motor to a CPU control board through a signal interface, and a data processing unit of the CPU control board performs data processing on the main loop current signal; a motor excitation Hall current sensor integrated in the CPU control board collects excitation current signals of an electric shovel motor and carries out data processing through a data processing unit. After data processing is completed, the CPU control panel controls the IGBT rectification circuit module to conduct rectification through the IGBT trigger circuit, the IGBT rectification circuit module is made to conduct sectional type excitation current control in an excavation mode and a descending mode respectively, the purpose of saving electric energy with the best characteristics is achieved, and remote real-time transmission is conducted through the 5G module.

Description

Technical Field

[0001] This application relates to the technical field of motor excitation control, and particularly to a rectification and regulation system for the excitation winding of a DC motor of an electric shovel. Background Art

[0002] At present, the excitation current regulation of DC motors in most electric shovels in China is mainly achieved by connecting a resistor in series in the excitation circuit. In this way, the excitation current remains constant during equipment operation. Although this method has a simple structure, there is obvious energy waste because part of the electrical energy is consumed in the resistor in the form of heat and cannot be effectively utilized. At the same time, if the resistor is set improperly, it may also affect the operation performance of the equipment, resulting in a decrease in motor efficiency and an increase in maintenance difficulty and cost. With the increasing complexity of the operation requirements of electric shovels and the improvement of precise control requirements, the traditional resistor regulation method has been difficult to meet the requirements of modern equipment for high energy efficiency and flexible performance. Therefore, there is an urgent need for a technical solution that can dynamically regulate the excitation current and significantly improve energy efficiency and the operation characteristics of the equipment. This application applies digital IGBT rectification technology and adopts segmented control of the excitation current, enabling the equipment to optimize the excitation characteristics according to the actual working conditions and save electrical energy. In addition, the remote transmission function enables maintenance personnel to obtain the equipment operation data in real time, reducing the maintenance time and cost and improving the overall operation and maintenance efficiency of the equipment. Content of the Utility Model

[0003] Aiming at the deficiencies of the existing technology, the purpose of this application is to provide a rectification and regulation system for the excitation winding of a DC motor of an electric shovel to solve the problems proposed in the above background art.

[0004] According to one aspect of this application, a rectification and regulation system for the excitation winding of a DC motor of an electric shovel includes a CPU control board, a motor armature Hall current sensor module, an IGBT rectification circuit module, a 5G remote communication module, and a human-machine interface module. The CPU control board is respectively connected to the motor armature Hall current sensor module, the IGBT rectification circuit module, the 5G remote communication module, and the human-machine interface module. The motor armature Hall current sensor module is connected to the CPU control board through a terminal interface and is used to detect the main circuit current of the DC motor of the electric shovel in real time. The CPU control board can control the IGBT rectification circuit module to rectify the excitation winding of the DC motor of the electric shovel. The 5G remote communication module is connected to the CPU control board through a terminal interface and is used to perform data interaction with the CPU control board and transmit system data in real time. The human-machine interface module is connected to the CPU control board through a network port and is used for modifying system data parameters and displaying real-time data.

[0005] Preferably, a motor excitation Hall current sensor, a data processing unit, and an IGBT trigger circuit are also integrated on the CPU control board. The motor excitation Hall current sensor is used to collect the excitation current signal of the DC motor of the electric shovel. The data processing unit is respectively connected to the motor excitation Hall current sensor, the 5G remote communication module, the motor armature Hall current sensor module, and the IGBT trigger circuit. The data processing unit is used for signal processing, triggering, and transmission. The data processing unit controls the IGBT rectifier circuit module to perform rectification through the IGBT trigger circuit.

[0006] Preferably, pins 1, 2, 3, 4, 5, and 6 of the CPU control board are connected to the input interface of the external control power supply module. The external control power supply module is used to provide the control power for the CPU control board. Pins 7, 8, and 9 of the CPU control board are connected to the 5G remote communication module interface. Pins 10, 11, and 12 of the CPU control board are connected to the signal interface of the motor armature Hall current sensor module.

[0007] Preferably, pin 1 of the CPU control board is connected to the 30V terminal, pin 2 of the CPU control board is connected to the DND terminal, pins 3, 4, 5, and 6 of the CPU control board are all connected to the 16V terminal, pins 7, 8, and 9 of the CPU control board are respectively connected to terminals A, B, and GND, and pins 10, 11, and 12 of the CPU control board are respectively connected to terminals NC, D, and GND.

[0008] The advantages of this application compared with the prior art are as follows: For a rectification and regulation system for the excitation winding of the DC motor of an electric shovel in this application, the motor armature Hall current sensor inputs the collected main circuit current signal of the DC motor of the electric shovel into the CPU control board through the signal interface, and the data processing unit of the CPU control board processes the main circuit current signal; the motor excitation Hall current sensor integrated in the CPU control board collects the excitation current signal of the electric shovel motor and processes it through the data processing unit; after the data processing is completed, the CPU control board controls the IGBT rectifier circuit module to perform rectification through the IGBT trigger circuit, and makes it perform segmented control of the excitation current in the excavation mode and the lowering mode respectively to achieve the most characteristic power saving, and performs remote real-time transmission through the 5G module. Description of the Drawings

[0009] Figure 1 is a schematic diagram of the system composition of a rectification and regulation system for the excitation winding of a DC motor of an electric shovel according to an embodiment of the present application.

[0010] Figure 2It is a schematic diagram of the system connection of a rectification and regulation system for the excitation winding of a DC motor of an electric shovel according to an embodiment of the present application. Detailed implementation manners

[0011] In order to make the content of the present application easier to be clearly understood, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application.

[0012] As Figure 1 and Figure 2 shown, a rectification and regulation system for the excitation winding of a DC motor of an electric shovel includes a CPU control board, a motor armature Hall current sensor module, an IGBT rectification circuit module, a 5G remote communication module, and a human-machine interface module. The CPU control board is respectively connected to the motor armature Hall current sensor module, the IGBT rectification circuit module, the 5G remote communication module, and the human-machine interface module; pin 1 of the CPU control board is connected to the 30V terminal, pin 2 of the CPU control board is connected to the DND terminal, pins 3, 4, 5, and 6 of the CPU control board are all connected to the 16V terminal, and pins 1, 2, 3, 4, 5, and 6 of the CPU control board are connected to the input interface of the external control power module. The external control power module is used to provide the control power for the CPU control board; pins 7, 8, and 9 of the CPU control board are respectively connected to the A terminal, the B terminal, and the GND terminal, and pins 7, 8, and 9 of the CPU control board are connected to the 5G remote communication module interface. The 5G remote communication module is used to perform data interaction with the CPU control board and transmit the system data to the server in real time; pins 10, 11, and 12 of the CPU control board are respectively connected to the NC terminal, the D terminal, and the GND terminal, and pins 10, 11, and 12 of the CPU control board are connected to the signal interface of the motor armature Hall current sensor module. The motor armature Hall current sensor module is used to detect the main circuit current of the DC motor of the electric shovel in real time; the CPU control board can control the IGBT rectification circuit module to rectify the excitation winding of the DC motor of the electric shovel. The human-machine interface module is connected to the CPU control board through an Ethernet port and is used for modifying the system data parameters and displaying the real-time data.

[0013] In one embodiment, a motor excitation Hall current sensor, a data processing unit, and an IGBT trigger circuit are also integrated on the CPU control board. The motor excitation Hall current sensor is used to collect the excitation current signal of the DC motor of the electric shovel. The data processing unit is respectively connected to the motor excitation Hall current sensor, the 5G remote communication module, the motor armature Hall current sensor module, and the IGBT trigger circuit. The data processing unit is used for signal processing, triggering, and transmission. The data processing unit controls the IGBT rectification circuit module to perform rectification through the IGBT trigger circuit.

[0014] The data processing unit is a DSP chip. The motor armature Hall current sensor inputs the main circuit current signal of the electric shovel DC motor collected through the signal interface to the CPU control board, and the data processing unit of the CPU control board processes the main circuit current signal; the motor field Hall current sensor integrated in the CPU control board collects the field current signal of the electric shovel motor and processes it through the data processing unit; after the data processing is completed, the CPU control board controls the IGBT rectifier circuit module to rectify through the IGBT trigger circuit, and at this time, the field current of the electric shovel DC motor starts to be provided.

[0015] The control logic of this rectification and regulation system is as follows:

[0016] (1) Judge whether the system is in the excavation mode or the lowering mode according to the electric shovel handle signal.

[0017] (2) According to the magnitude of the motor armature main circuit current in the excavation mode, the DC motor field current is controlled in 4 segments based on the rated current; in the lowering mode, it is controlled in 3 segments: empty bucket, half-empty bucket, and full bucket.

[0018] (3) The CPU control board can judge the magnitude of the load of the electric shovel DC motor according to the current signal collected by the motor armature Hall current sensor; trigger IGBT rectification according to the parameters set by the human-machine interface (LCD); the Hall current sensor of the motor field winding (installed on the CPU control board) also detects the magnitude of the field current in real time for closed-loop control; the CPU control board communicates with the 5G remote communication module to transmit data to the server and display it on the PC side.

[0019] The above embodiments are only used to illustrate the technical solutions of the embodiments of the present application, rather than to limit them. Although the embodiments of the present application have been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that without departing from the spirit and scope defined by the claims of the present application, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features.

Claims

1. A rectification and regulation system for the excitation winding of a DC motor of an electric shovel, comprising a CPU control board, a motor armature Hall current sensor module, an IGBT rectification circuit module, a 5G remote communication module, and a human-machine interface module, characterized in that, The CPU control board is respectively connected to the motor armature Hall current sensor module, the IGBT rectifier circuit module, the 5G remote communication module, and the human-machine interface module. The motor armature Hall current sensor module is connected to the CPU control board through a terminal interface and is used to detect the main circuit current of the electric shovel DC motor in real time. The CPU control board can control the IGBT rectifier circuit module to rectify the excitation winding of the electric shovel DC motor. The 5G remote communication module is connected to the CPU control board through a terminal interface and is used to interact with the CPU control board for data and transmit system data in real time. The human-machine interface module is connected to the CPU control board through a network port and is used for modifying system data parameters and displaying real-time data.

2. The rectification and regulation system for the excitation winding of the DC motor of an electric shovel according to claim 1, wherein, The CPU control board also integrates a motor excitation Hall current sensor, a data processing unit, and an IGBT trigger circuit. The motor excitation Hall current sensor is used to collect the excitation current signal of the electric shovel DC motor. The data processing unit is respectively connected to the motor excitation Hall current sensor, the 5G remote communication module, the motor armature Hall current sensor module, and the IGBT trigger circuit. The data processing unit is used for signal processing, triggering, and transmission. The data processing unit controls the IGBT rectifier circuit module to perform rectification through the IGBT trigger circuit.

3. A rectification and regulation system for an excitation winding of a DC motor of an electric shovel according to claim 2, characterized in that, Pin 1, Pin 2, Pin 3, Pin 4, Pin 5, and Pin 6 of the CPU control board are connected to the input interface of the external control power supply module. The external control power supply module is used to provide the control power for the CPU control board. Pin 7, Pin 8, and Pin 9 of the CPU control board are connected to the 5G remote communication module interface. Pin 10, Pin 11, and Pin 12 of the CPU control board are connected to the signal interface of the motor armature Hall current sensor module.

4. A rectification and regulation system for the excitation winding of a DC motor of an electric shovel according to claim 3, characterized in that, Pin 1 of the CPU control board is connected to the 30V terminal. Pin 2 of the CPU control board is connected to the DND terminal. Pin 3, Pin 4, Pin 5, and Pin 6 of the CPU control board are all connected to the 16V terminal. Pin 7, Pin 8, and Pin 9 of the CPU control board are respectively connected to the A terminal, the B terminal, and the GND terminal. Pin 10, Pin 11, and Pin 12 of the CPU control board are respectively connected to the NC terminal, the D terminal, and the GND terminal.

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