A crane servo drive redundancy control system

Abstract

The utility model discloses a kind of crane servo driver redundancy control system, including main servo driver, spare servo driver, motion controller and relay group;Main servo driver and spare servo driver are connected with motor respectively through main power supply line and spare power supply line;Motion controller monitors the working condition of main servo driver in real time and monitors the communication state between main servo driver and motor, parameter data are analyzed and handled, and according to parameter data, the on-off state of relay group is controlled by judging;The utility model avoids crane to stop due to driver fault, greatly improves the reliability and usability of crane;Fault can be found in time and alarm signal is sent, reduce fault loss;It is applicable to various types and specifications of crane servo driver, with strong versatility and compatibility.

Description

Technical Field

[0001] This utility model relates to the field of crane control technology, specifically a redundant control system for crane servo drives. Background Technology

[0002] In many industrial production scenarios, cranes play a crucial role in material handling. In scenarios with extremely high reliability requirements, such as steel smelting, chemical production, and port loading and unloading, a crane stopping due to servo drive failure can not only lead to production interruptions and significant economic losses, but also potentially trigger serious safety accidents. Traditional crane servo drive systems often lack effective redundancy design; when a single servo drive fails, it is difficult to quickly switch to a backup servo drive, thus affecting the normal operation of the crane. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide a redundant control system for crane servo drives, which avoids the crane from stopping due to drive failure, greatly improves the reliability and availability of the crane; it can detect faults in time and issue alarm signals, reducing failure losses; it is applicable to various types and specifications of crane servo drives, has strong versatility and compatibility, and can effectively solve the problems in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a redundant control system for a crane servo drive, comprising a main servo drive, a backup servo drive, a motion controller, and a relay group; the main servo drive and the backup servo drive are respectively connected to the motor through a main power supply line and a backup power supply line; The motion controller monitors the working status of the main servo driver and the communication status between the main servo driver and the motor in real time, analyzes and processes the parameter data, and makes judgments based on the parameter data to control the on / off status of the relay group. The relay group includes relays K1, K2, K3 and K4 connected in parallel. Relay K1 is connected in series with the normally closed contact of relay K2, relay K2 is connected in series with the normally closed contact of relay K1, relay K3 is connected in series with the normally closed contact of relay K4, and relay K4 is connected in series with the normally closed contact of relay K3. The main power supply line is connected in series with the normally open contacts of relay K1 and relay K3, and the backup power supply line is connected in series with the normally open contacts of relay K2 and relay K4.

[0005] Preferably, the motion controller monitors the working status of the main servo drive in real time, and the parameter data includes one or more of current, voltage, temperature and motor speed. The motion controller collects the parameter data through one or more sensors.

[0006] Preferably, the motion controller judges the monitored parameter data according to a preset fault threshold. When a certain parameter data exceeds the preset fault threshold, it is determined that the main servo driver has failed, and the motion controller immediately triggers a fault alarm signal. This signal can be transmitted to the operator through an audible and visual alarm or a host computer system.

[0007] Compared with the prior art, the advantages of this utility model are as follows: By setting a main servo driver and a backup servo driver, the system can quickly switch to the backup servo driver when the main servo driver fails, avoiding the crane from stopping due to driver failure and greatly improving the reliability and availability of the crane; the switching process uses a relay group to realize the rapid switching of motor control signals, and the switching process is fast and smooth, reducing the impact on crane operation and ensuring the continuity of production; the motion controller monitors the working status of the main servo driver in real time, which can detect faults in time and issue alarm signals, making it convenient for operators to take timely measures and reduce failure losses; it is applicable to various types and specifications of crane servo drivers and has strong versatility and compatibility. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the control principle of this utility model; Figure 2 This is a schematic diagram of the relay group circuit of this utility model.

[0009] In the diagram: 1. Main servo driver, 2. Backup servo driver, 3. Sensor, 4. Motor, 5. Motion controller, 6. Relay group. Detailed Implementation

[0010] The present invention can be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "front", "rear", "left", "right" indicating the orientation or positional relationship, they are only corresponding to the drawings of this application for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation.

[0011] Please see Figure 1-2This utility model provides a technical solution: a redundant control system for crane servo drives, including a main servo drive 1, a backup servo drive 2, a motion controller 5, and a relay group 6; the main servo drive 1 and the backup servo drive 2 are electrically connected to the motor 4 through the main power supply line and the backup power supply line, respectively. The motion controller 5 monitors the working status of the main servo driver 1 and the communication status between the main servo driver 1 and the motor 4 in real time, analyzes and processes the parameter data, and judges the on / off status of the relay group 6 based on the parameter data; it can detect faults in time and issue alarm signals, so that operators can take timely measures to reduce fault losses. Specifically, the motion controller 5 monitors the working status of the main servo driver 1 in real time. The parameter data includes one or more of current, voltage, temperature and motor speed. The motion controller 5 collects parameter data through one or more sensors (3). The sensor 3 includes current and voltage transformers, temperature sensors or Hall sensors. It should be noted that the motion controller 5 judges the monitored parameter data according to the preset fault threshold. When a certain parameter data exceeds the preset fault threshold, it is determined that the main servo drive 1 has failed. The motion controller 5 immediately triggers a fault alarm signal, which can be transmitted to the operator through an audible and visual alarm or a host computer system. The relay group 6 includes relays K1, K2, K3 and K4 connected in parallel. Relay K1 is connected in series with the normally closed contact of relay K2, relay K2 is connected in series with the normally closed contact of relay K1, relay K3 is connected in series with the normally closed contact of relay K4, and relay K4 is connected in series with the normally closed contact of relay K3. The main power supply line is connected in series with the normally open contacts of relay K1 and relay K3, and the backup power supply line is connected in series with the normally open contacts of relay K2 and relay K4. Understandably, the motion controller 5 analyzes and processes the data, and judges the monitored parameters according to the preset fault threshold. When a parameter exceeds the normal range, such as excessive current, excessive temperature, or communication interruption, it is determined that the main servo drive 1 has failed. The fault threshold can be set according to the model, specifications, and actual working environment of the servo drive. Once the main servo drive 1 is determined to have failed, the motion controller 5 immediately triggers a fault alarm signal. This signal can be transmitted to the operator through an audible and visual alarm or a host computer system to remind them to pay attention to the abnormal situation of the crane. While triggering the fault alarm, the motion controller 5 performs initialization operations on the backup servo drive 2, including setting control parameters and checking communication connections, to ensure that the backup servo drive 2 is in a ready state. The control parameters can be adjusted according to the current operating status of the main servo drive 1 to ensure a smooth transition after switching. Once the backup servo drive 2 is ready, the motion controller 5 switches the motor control signal from the main servo drive 1 to the backup servo drive 2 through the switching circuit. After the switching is completed, the motion controller 5 continues to monitor the working status of the backup servo drive 2. After completing one working cycle of the crane, the crane is stopped for maintenance, and maintenance personnel conduct fault diagnosis and repair on the main servo drive. The switching circuit process is as follows: When the main servo drive 1 is working normally, the motion controller 5 supplies power to relays K1 and K3. The normally open contacts of relays K1 and K3 are closed, and the main servo drive 1 supplies power to the motor 4 through the main power supply line. At this time, the normally closed contacts of relays K1 and K3 are open, so the backup servo drive 2 will not supply power to the motor 4. Conversely, when the main servo drive 1 fails and the backup servo drive 2 needs to be switched, the motion controller 5 supplies power to relays K2 and K4, so the backup servo drive 2 supplies power to the motor 4, and the main servo drive 1 does not supply power to the motor 4, ensuring safety interlocking. When the main servo drive 1 fails, it can quickly switch to the backup servo drive 2, avoiding the crane from stopping due to drive failure, and greatly improving the reliability and availability of the crane.

[0012] The parts of this utility model not described in detail are prior art. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that this utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects, and are intended to include all changes that fall within the meaning and scope of equivalents in the content of this utility model.

Claims

1. A crane servo drive redundancy control system, characterized by: It includes a main servo driver (1), a backup servo driver (2), a motion controller (5), and a relay group (6); the main servo driver (1) and the backup servo driver (2) are connected to the motor (4) through the main power supply line and the backup power supply line, respectively; The motion controller (5) monitors the working status of the main servo driver (1) and the communication status between the main servo driver (1) and the motor (4) in real time, analyzes and processes the parameter data, and makes judgments based on the parameter data to control the on / off state of the relay group (6). The relay group (6) includes relays K1, K2, K3 and K4 connected in parallel. Relay K1 is connected in series with the normally closed contact of relay K2, relay K2 is connected in series with the normally closed contact of relay K1, relay K3 is connected in series with the normally closed contact of relay K4, and relay K4 is connected in series with the normally closed contact of relay K3. The main power supply line is connected in series with the normally open contacts of relay K1 and relay K3, and the backup power supply line is connected in series with the normally open contacts of relay K2 and relay K4.

2. A redundant control system for a crane servo drive according to claim 1, characterized in that: The motion controller (5) monitors the working status of the main servo driver (1) in real time. The parameter data includes one or more of current, voltage, temperature and motor speed. The motion controller (5) collects the parameter data through one or more sensors (3).

3. A redundant crane servo drive control system according to claim 1, characterized in that: The motion controller (5) judges the monitored parameter data according to the preset fault threshold. When a parameter data exceeds the preset fault threshold, it is determined that the main servo driver (1) has failed. The motion controller (5) immediately triggers a fault alarm signal, which can be transmitted to the operator through an audible and visual alarm or a host computer system.

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