Electric glue servo system

Abstract

The utility model discloses a kind of electric hot melt glue servo systems, comprising: host computer and electric hot melt glue motor unit, electric hot melt glue motor unit includes rectifier module, multiple inverter modules, servo motor unit and speed reducer;Rectifier module configuration protocol conversion module;Host computer is connected with rectifier module by first bus, and rectifier module is connected with inverter module by second bus;Protocol conversion module is used for the conversion of communication protocol between first bus and second bus;Rectifier module is electrically connected with multiple inverter modules by direct current bus, inverter module is electrically connected with servo motor unit, and servo motor unit is mechanically connected with speed reducer.

Description

Technical Field

[0001] This utility model relates to automatic control technology, and more particularly to an electric melt servo system. Background Technology

[0002] Currently, most electric melting systems for injection molding machines on the market use a single servo motor with a single servo drive or multiple servo motors with multiple servo drives. For large injection systems, this results in a larger overall size, a bulky driver housing, and increased manufacturing costs. Furthermore, in terms of communication connectivity, the communication links between components in traditional equipment are inefficient. Utility Model Content

[0003] This invention provides an electric melting servo system to address at least one defect in the existing technology.

[0004] This utility model provides an electric melt glue servo system, including: a host computer and an electric melt glue motor unit, wherein the electric melt glue motor unit includes a rectifier module, multiple inverter modules, a servo motor unit and a reducer;

[0005] The rectifier module is configured with a protocol conversion module;

[0006] The host computer is connected to the rectifier module via a first bus, and the rectifier module is connected to the inverter module via a second bus.

[0007] The protocol conversion module is used for converting the communication protocol between the first bus and the second bus;

[0008] The rectifier module is electrically connected to multiple inverter modules via a DC bus, the inverter modules are electrically connected to the servo motor unit, and the servo motor unit is mechanically connected to the reducer.

[0009] Optionally, the rectifier module is further configured with a first communication interface and a second communication interface;

[0010] The host computer is connected to the first communication interface via the first bus, and the second communication interface is connected to the inverter module via the second bus.

[0011] Optionally, the inverter module is configured with a third communication interface and a communication unit;

[0012] The second communication interface is connected to the third communication interface of the inverter module via the second bus;

[0013] The communication unit is configured to interact with the second communication interface via the third communication interface and the second bus.

[0014] Optionally, the servo motor unit includes one or more sets of servo motors, and each set of servo motors includes servo motors corresponding to the number of inverter modules.

[0015] Optionally, the system may include multiple reducers, with one reducer configured with two servo motors.

[0016] Optionally, the first bus is an EtherCAT bus.

[0017] Optionally, the second bus is an EPMC bus.

[0018] Optionally, one encoder can be configured for each servo motor.

[0019] Optionally, the rectifier module is configured with a PLC, and the PLC is configured with the first communication interface, the second communication interface, and the protocol conversion module.

[0020] Optionally, the electric melting servo system is used for electric melting.

[0021] Compared with existing technologies, the advantages of this invention are as follows: This invention proposes an electric melt glue servo system that combines the rectifier and inverter sections as independent units. It can rationally configure the DC bus based on the current-carrying capacity of different injection units, reducing the number of rectifier units, saving driver space, eliminating the need to reserve wiring space on top of the driver, and reducing wiring workload. Furthermore, the system employs two buses with different characteristics for collaborative operation, optimizing the overall system communication architecture, improving communication efficiency and stability, and enabling more precise and reliable control of the electric melt glue motor unit by the host computer. This ensures the efficient and stable operation of the entire electric melt glue process, meeting the stringent requirements of industrial production for electric melt glue systems in terms of automation and precision. Attached Figure Description

[0022] Figure 1 This is a block diagram of the electric melt servo system in the embodiment;

[0023] Figure 2 This is a block diagram of another electric melt servo system structure in the embodiment. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0025] Figure 1This is a block diagram of the electric melt servo system in the embodiment, for reference. Figure 1 The electric melt glue servo system includes: a host computer 100 and an electric melt glue motor unit. The electric melt glue motor unit includes a rectifier module 200, multiple inverter modules (inverter module 301, inverter module 302), a servo motor unit (including servo motor 401, servo motor 402) and a reducer 500.

[0026] The host computer 100 is connected to the rectifier module 200 via the first bus, and the rectifier module 200 is connected to multiple inverter modules via the second bus.

[0027] The rectifier module 200 is electrically connected to multiple inverter modules via a DC bus; one inverter module is electrically connected to one servo motor; and multiple servo motors are mechanically connected to the reducer 500.

[0028] For example, in this solution, the host computer 100 can be used to record and store data of the electric melt servo system. For instance, the host computer 100 can record various parameters during the melt process, such as melt speed, melt back pressure, melt torque, etc.

[0029] For example, the host computer can be integrated with the MES (Manufacturing Execution System) system to upload data to the MES database according to the system interface specifications; or the host computer can use a WIFI network to package the data and send it to a remote server or cloud platform.

[0030] Users can access the server or cloud platform through a browser or dedicated client on remote terminals (such as mobile phones and computers) to obtain uploaded data and display it visually, thereby enabling real-time monitoring, data analysis and remote control of equipment or production processes.

[0031] Operators can send control commands to the melting equipment via the host computer 100 to set various parameters of the melting process. For example, they can set the melting speed, melting back pressure, and melting torque.

[0032] For example, in this solution, the electric melt motor unit is used to precisely control the rotation and forward movement of the screw, thereby stirring the heated plastic material and ensuring that the plastic material can be melted uniformly.

[0033] For example, in this solution, the electric melt glue motor unit includes a rectifier module 200, multiple inverter modules, multiple servo motors, and a reducer 500.

[0034] The rectifier module primarily functions to convert alternating current (AC) to direct current (DC). Through its internal rectifier circuit (such as a bridge rectifier circuit), the rectifier module converts AC voltage into a stable DC voltage, providing DC power to the subsequent inverter module.

[0035] The main function of the inverter module is to convert the direct current (DC) output from the rectifier module into alternating current (AC), which then drives the servo motor. The inverter module can precisely control the frequency, amplitude, and phase of the output AC power according to instructions from the host computer, thereby achieving precise control of the servo motor.

[0036] The servo motor is the power output component of the electric melt-bonding motor unit. It can precisely control the speed, direction, and torque based on the AC power output from the inverter module. The servo motor also has a feedback function, capable of transmitting information such as the motor's actual speed and position back to the inverter module and the host computer via built-in encoders and other devices.

[0037] The speed reducer primarily functions to lower the rotational speed and increase the torque. In an electric melt-bonding system, the servo motor may operate at a relatively high speed, but the melt-bonding process typically requires a lower speed and a higher torque. The speed reducer, through gear transmission or other means, converts the high-speed rotation of the servo motor into a low-speed, high-torque output suitable for melt-bonding.

[0038] For example, in this solution, the host computer 100 is connected to the rectifier module 200 via a first bus, and the rectifier module 200 is connected to multiple inverter modules via a second bus.

[0039] In this solution, the operator can set various parameters on the interface of the host computer 100 according to the process requirements of the melt adhesive. For example, for different melt adhesive raw materials and product characteristics, the input voltage range of the rectifier module 200, the output frequency range of the inverter module, and the speed and torque of the servo motor can be set.

[0040] After the settings are completed, the host computer 100 transmits the relevant parameters of the rectifier module 200 and the inverter module to the rectifier module 200 through the first bus. The rectifier module 200 adjusts its own working state according to the received parameters for the inverter module 200.

[0041] The rectifier module 200 transmits parameters for the inverter module to the corresponding inverter module via the second bus. The inverter module controls the frequency, amplitude, etc. of the output AC power accordingly, thereby precisely controlling the operation of the servo motor.

[0042] The host computer 100 can continuously receive status information from the rectifier module 200 and the inverter module. The rectifier module 200 can feed back its own temperature, input and output voltage and current and other information to the host computer 100.

[0043] The inverter module also transmits its own output current, voltage, power and other information, as well as the feedback information of the connected servo motor (such as motor speed, torque, temperature, etc.) to the host computer 100.

[0044] When the host computer 100 determines that the rectifier module or inverter module is abnormal based on the above information, it can take corresponding measures according to the preset program, such as reducing the workload of the rectifier module 200 or starting the heat dissipation device, pausing the operation of the relevant servo motors or adjusting their operating parameters, etc.

[0045] In this scheme, the rectifier module is configured with a first communication interface, a second communication interface and a protocol conversion module, and the inverter module is configured with a third communication interface and a communication unit.

[0046] The host computer communicates with the first communication interface via the first bus, and the second communication interface communicates with the third communication interface of multiple inverter modules via the second bus. The third communication interface is connected to the corresponding communication unit. The protocol conversion module is connected to the first communication interface and the second communication interface.

[0047] For example, in this solution, the host computer communicates with the rectifier module, thereby enabling communication with the electric melt glue motor unit. Inside the electric melt glue motor unit, the rectifier module and the inverter module exchange data via a second bus.

[0048] In this scheme, the protocol conversion module is used to convert the communication protocol between the first bus and the second bus; the communication unit is used to interact with the second communication interface through the third communication interface and the second bus.

[0049] For example, in this solution, the host computer uses a first protocol to communicate with the rectifier module, and the rectifier module uses a second protocol to communicate with the inverter module. The first protocol and the second protocol can be the same or different. The protocol conversion module is used to convert between different first protocols and second protocols.

[0050] For example, in this solution, the protocol conversion module may include a bridging chip, which is used to implement protocol conversion, address mapping, and data buffering.

[0051] For example, in this solution, the communication unit can be specifically used to acquire motion control data sent by the host computer, acquire status words, speed, torque and other data generated by the controller inside the inverter module, and send the above data (through the rectifier module) to the host computer.

[0052] In this solution, the rectifier unit inside the electric melt glue motor unit communicates with the host computer as the only communication slave, which can reduce the number of communication slaves and improve the overall cycle time.

[0053] In this solution, the host computer and the rectifier module are connected through the first bus. This allows the host computer to quickly and accurately transmit various complex parameters required by the rectifier module (such as input voltage range settings) and receive a large amount of status information (such as temperature, input and output voltage and current) from the rectifier module in a timely manner, ensuring the timeliness and accuracy of monitoring and controlling the working status of the rectifier module.

[0054] The rectifier module is connected to multiple inverter modules via a second bus, forming a distributed connection of multiple inverter modules. This effectively coordinates the operation of multiple inverter modules, ensuring that each inverter module accurately receives information from the rectifier module and control commands (such as output frequency range setting) indirectly transmitted by the host computer through the rectifier module. It also stably feeds back information about itself and the connected servo motors (such as output current, voltage, power, motor speed, torque, temperature, etc.).

[0055] For example, in this solution, when the electric melt glue servo system is started, the host computer 100 first performs a self-test to check whether its own hardware devices (such as communication interfaces, processors, etc.) are working properly.

[0056] Subsequently, an initialization command is sent to the rectifier module 200 via the first bus. The host computer 100 sequentially checks the communication connection with the rectifier module 200, the inverter module, and the status information of the servo motor to ensure that the entire electric melt glue motor unit is in a working state.

[0057] The operator sets parameters on the host computer 100's operating interface according to the melt adhesive formula and production requirements. After the host computer 100 transmits the parameters to the rectifier module 200 and the inverter module, it starts the melt adhesive process.

[0058] This embodiment proposes an electric melt glue servo system. This system treats the rectifier and inverter sections as independent units, allowing for optimized configuration based on the DC bus current-carrying capacity of different injection units. This reduces the number of rectifier units, saves driver space, eliminates the need for pre-reserved wiring space on top of the drivers, and reduces wiring workload. Furthermore, the system employs two buses with different characteristics for collaborative operation, optimizing the overall system communication architecture, improving communication efficiency and stability. This enables more precise and reliable control of the electric melt glue motor unit by the host computer, ensuring efficient and stable operation of the entire electric melt glue process and meeting the stringent requirements of industrial production for electric melt glue systems in terms of automation and precision.

[0059] Based on any of the aforementioned schemes, in one possible implementation, the servo motor unit includes one or more sets of servo motors, and each set of servo motors includes servo motors corresponding to the number of inverter modules.

[0060] In this solution, the servo motor unit can consist of one or more servo motors, forming a modular power output structure. The number of servo motors in each servo motor group corresponds exactly to the number of inverter modules in the system; that is, one inverter module drives one servo motor, ensuring precise matching between the control signal and the power output.

[0061] For example, if the system includes 4 inverter modules, then each group of servo motors needs to be configured with 4 servo motors, which are electrically connected to the 4 inverter modules one by one (one inverter module drives one servo motor).

[0062] For example, in this solution, the system can dynamically select to activate some servo motors according to the fault status, and automatically switch to other normal servo motors when a fault occurs, thereby achieving energy-saving operation, load balancing and system fault tolerance, and improving the stability and adaptability of the melt adhesive system.

[0063] For example, this solution can monitor the output voltage and current fluctuations, temperature anomalies, and communication interruptions of the inverter module. It can also monitor the speed deviation, torque anomalies, and overload conditions of the servo motor. Furthermore, it can monitor the detection data from the first bus (Ethercat) and the second bus (EPMC).

[0064] The host computer can be configured to receive the above real-time data via the Ethercat bus and determine whether the servo motor has malfunctioned through a preset status database (for example, whether the current exceeds the limit, the temperature exceeds the upper limit, the speed deviation exceeds the limit, etc.).

[0065] For example, in this solution, if the system is configured with multiple servo motors, when one servo motor in a certain group fails, the load is shared by the other normal servo motors in the same group (by reallocating torque parameters through the host computer); if the entire group fails, the system switches to another group to operate independently.

[0066] For example, in this solution, the host computer identifies the faulty servo motor, generates a switching command, and sends the switching command through the EPMC bus to activate the backup servo motor.

[0067] For example, in this solution, the host computer transmits control commands (such as speed and torque parameters) to the rectifier module via a first bus (such as an EtherCAT bus). After protocol conversion, the rectifier module distributes the commands to each inverter module via a second bus (such as an EPMC bus).

[0068] The inverter module converts DC power into AC power of a specific frequency and amplitude according to the instructions, which drives the corresponding servo motor to operate. The servo motor provides real-time feedback of speed and position information through the encoder, forming a closed-loop control.

[0069] Based on any of the aforementioned solutions, in one possible implementation, multiple reducers are included, with each reducer configured with two servo motors.

[0070] In this solution, each reducer is equipped with two servo motors. The two servo motors work together to provide power input to the reducer. The reducer then reduces speed and increases torque to output low-speed, high-torque power suitable for the melt glue process.

[0071] For example, in this solution, the input shaft of each reducer is connected to the output shaft of two servo motors via a coupling or gear structure, ensuring that the power of the two motors can be synchronously transmitted to the reducer. For instance, the input end of the reducer is designed with a double gear meshing structure, which meshes with the output gears of the two servo motors respectively, to achieve power convergence.

[0072] For example, in this solution, the dual-motor drive single reducer can achieve power redundancy. When one motor fails, the other motor can temporarily take over the load, reducing downtime caused by single-point failure and improving the system's fault tolerance.

[0073] exist Figure 1 Based on the scheme shown, in one possible implementation, the first bus adopts the EtherCAT bus.

[0074] In this solution, the EtherCAT bus is used as the primary bus, enabling millisecond-level communication between the host computer and the rectifier module, and microsecond-level communication between the rectifier module and the inverter module. In the electric melt adhesive system, ultra-fast data exchange is possible between the host computer and the rectifier module.

[0075] The high-precision synchronization characteristics of the EtherCAT bus ensure that the motion between axes is highly synchronized in multi-axis control scenarios (such as multiple servo motors working together).

[0076] Based on any of the aforementioned schemes, in one possible implementation, the second bus adopts the EPMC bus.

[0077] In this solution, the EPMC bus is a bus based on the Ethernet communication protocol. The EPMC bus can be used to easily realize the modular expansion of the electric melt servo system. When expansion is required, the address and related parameters of the new device can be set to achieve communication connection with the existing rectifier module and other inverter modules without the need for large-scale modification of the entire bus system.

[0078] Based on any of the aforementioned schemes, in one feasible implementation, the reducer employs a two-stage reduction mechanism.

[0079] In this solution, the reducer adopts a two-stage reduction mechanism. The two-stage reduction mechanism, through two consecutive reduction stages, can achieve a larger total reduction ratio than a single-stage reduction mechanism. This allows the output speed to be precisely matched with the requirements of the melt adhesive process, avoiding quality problems such as uneven melt adhesive mixing or excessive bubbles caused by excessive speed.

[0080] Compared to single-stage reduction mechanisms, two-stage reduction mechanisms adjust speed and torque progressively at each stage, reducing vibration and impact that may be caused by sudden large-scale deceleration or torque changes. This smooth transmission characteristic helps extend the service life of the mixing device, servo motor, and other related components, reduces equipment maintenance costs, and also avoids fluctuations in melt quality caused by transmission instability.

[0081] Based on the aforementioned two-stage reduction mechanism scheme for the reducer, in one feasible implementation, the two-stage reduction mechanism includes a first-stage reduction and a second-stage reduction.

[0082] For example, in this solution, the gear ratio of the first-stage gear and the second-stage gear is designed according to actual needs, thereby achieving the specified reduction ratio;

[0083] For example, the number of teeth of the first-stage driving pinion can be 20, the number of teeth of the first-stage driven gear can be 100, and the torque after the first-stage reduction is amplified by 5 times.

[0084] When the first-stage driven large gear rotates, since it is coaxial with the second-stage driving small gear, the second-stage driving small gear rotates synchronously, seamlessly transmitting power to the second-stage reduction mechanism;

[0085] The number of teeth on the second-stage driving pinion can be 15, and the number of teeth on the second-stage driven gear can be 90. After the second-stage reduction, the torque is amplified by 6 times on the basis of the first-stage amplification, and the total torque amplification factor can reach about 30 times.

[0086] In this solution, the output torque of the servo motor is increased by a two-stage reduction mechanism, which can stably drive the melting screw, making it rotate slowly and powerfully in the molten material, ensuring the smooth progress of the melting process. It can effectively handle both the initial mixing of raw materials and the later stirring of high-viscosity molten materials.

[0087] Based on any of the aforementioned solutions, in one possible implementation, a servo motor is configured with an encoder.

[0088] In this scheme, the encoder is used to measure the position change per unit time, and then calculate the actual speed of the servo motor.

[0089] The encoder feeds back real-time speed information to the host computer or inverter module. The host computer can compare the set speed curve with the actual feedback speed and adjust the AC frequency output by the inverter module in a timely manner, thereby precisely controlling the speed of the servo motor and ensuring that it always runs at the ideal speed, thus improving the controllability and efficiency of the melting process.

[0090] Based on any of the aforementioned solutions, in one possible implementation, a PLC is configured within the rectifier module, and the PLC is used for communication and interaction with the host computer.

[0091] In this solution, the PLC in the rectifier module can be connected to the host computer via an Ethernet interface. The Ethernet interface serves as the primary communication interface, enabling high-speed and stable data transmission between the rectifier module and the host computer to meet the needs of large-scale data interaction between them.

[0092] In this solution, the PLC can also be configured with an EPMC interface, which serves as a second communication interface. The EPMC interface can be the same as the PROFINET interface or the Ethercat interface.

[0093] Figure 2 This is a block diagram of another electric melt servo system in the embodiment, for reference. Figure 2 Based on any of the aforementioned solutions, in one possible implementation, the electric melt servo system includes:

[0094] The system includes a host computer 100, a rectifier module 200, multiple inverter modules (inverter modules 301 to 304), multiple servo motors (servo motors 401 to 404), and a reducer. Each servo motor is equipped with an encoder.

[0095] A PLC is configured inside the rectifier module. The host computer 100 communicates with the PLC in the rectifier module 200 via the Ethercat bus. The PLC in the rectifier module communicates with the inverter modules 301 to 304 via the EPMC bus.

[0096] The rectifier module 200 is electrically connected to the inverter modules 301-304 via a DC bus;

[0097] The inverter module internally achieves data interaction through the EPMC bus. EPMC is a communication protocol based on Ethernet. The rectifier unit, as the only slave station, communicates with the master station (host computer) via the external EtherCAT line. The host computer sends speed, torque and other action commands to the slave station. The slave station receives and executes the commands and feeds back the shaft position, speed, torque and other information to the master station through its PLC.

[0098] In this solution, the specific steps of the EPMC communication data transmission process include:

[0099] The host computer sends start control words, speed, torque and other parameters to the rectifier unit via an external EtherCAT bus;

[0100] The rectifier unit acts as the master station, mapping parameters and commands from the external Ethercat bus to the internal EPMC bus.

[0101] Each inverter unit obtains its own motion control data from the master station through the internal EPMC bus; each inverter unit calculates a new compensation coefficient after completing the previous action task; and executes the action command to control the servo motor to rotate.

[0102] In this solution, the specific steps of the EPMC communication data reception process include:

[0103] Each inverter unit feeds back status words, speed, torque and other data to the master station through the internal bus; the master station rectifier unit processes the data and maps it to the external bus to feed back to the host computer; the host computer obtains the data through the external bus.

[0104] In this solution, the operator sets parameters such as start control word, speed, and torque on the host computer's interface according to the melt adhesive process requirements. The host computer sends these parameters to the rectifier unit via the EtherCAT bus (external bus).

[0105] After receiving data from the host computer, the rectifier unit first verifies and parses the data to ensure its accuracy and integrity. Then, it maps these parameters and instructions from the EtherCAT bus (external bus) to the EPMC bus (internal bus). During the mapping process, different parameters and instructions are allocated to the corresponding data registers and control registers of the EPMC bus according to pre-defined mapping rules.

[0106] Each inverter unit (such as inverter module 301, inverter module 302, etc.) obtains its own motion control data from the master station (rectifier unit) through the EPMC bus (internal bus);

[0107] The inverter module 301 generates an AC signal suitable for the connected servo motor (such as servo motor 401) based on the acquired motion control data and the calculated compensation coefficient, and controls the servo motor 401 to rotate.

[0108] Meanwhile, other inverter units also control the rotation of their respective connected servo motors according to the same process, thereby enabling multiple servo motors to work collaboratively under the communication control of EPMC to complete tasks such as melting and stirring of glue.

[0109] While executing action commands, each inverter unit continuously monitors the status of the connected servo motors through the EPMC bus (internal bus) and feeds back data such as status words, speed, and torque to the master station (rectifier unit);

[0110] After receiving data from each inverter unit, the rectifier unit integrates and processes the data. Then, it maps the processed data from the EPMC bus (internal bus) to the EtherCAT bus (external bus) according to mapping rules and feeds it back to the host computer. During the mapping process, the data is converted into a format and data structure that the host computer can recognize.

[0111] The host computer receives data from the rectifier unit via the EtherCAT bus (external bus). After receiving the data, the host computer's monitoring software unpacks and parses it, then displays the data on the monitoring interface.

[0112] In this solution, the rectifier and inverter sections are combined as independent units. The current-carrying capacity of the DC bus can be calculated based on different injection units to achieve a rational configuration, reducing the number of rectifier units, saving driver space, eliminating the need to reserve wiring space on top of the drivers, and reducing wiring workload. Only one set of input filter, reactor, and braking resistor is required, reducing costs and saving on components. Multi-axis energy sharing improves energy efficiency and achieves high energy savings. Each inverter unit communicates and is monitored via an internal EPMC bus, reducing dependence on the host computer and saving costs. All drive units have the same size and can be modularly expanded according to the injection units, providing flexibility.

[0113] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. An electric melt-bonding servo system, characterized in that, include: The host computer and the electric melt glue motor unit, wherein the electric melt glue motor unit includes a rectifier module, multiple inverter modules, a servo motor unit and a reducer; The rectifier module is configured with a protocol conversion module; The host computer is connected to the rectifier module via a first bus, and the rectifier module is connected to the inverter module via a second bus. The protocol conversion module is used to convert the communication protocol between the first bus and the second bus; The rectifier module is electrically connected to multiple inverter modules via a DC bus, the inverter modules are electrically connected to the servo motor unit, and the servo motor unit is mechanically connected to the reducer.

2. The electric melt servo system as described in claim 1, characterized in that, The rectifier module is also equipped with a first communication interface and a second communication interface; The host computer is connected to the first communication interface via the first bus, and the second communication interface is connected to the inverter module via the second bus.

3. The electric melt servo system as described in claim 2, characterized in that, The inverter module is equipped with a third communication interface and a communication unit; The second communication interface is connected to the third communication interface of the inverter module via the second bus; The communication unit is configured to interact with the second communication interface via the third communication interface and the second bus.

4. The electric melt servo system as described in claim 1, characterized in that, The servo motor unit includes one or more sets of servo motors, and each set of servo motors includes servo motors corresponding to the number of inverter modules.

5. The electric melt servo system as described in claim 4, characterized in that, It includes multiple reducers, and one reducer is configured with two servo motors.

6. The electric melt servo system as described in claim 1, characterized in that, The first bus uses the EtherCAT bus.

7. The electric melt servo system as described in claim 1, characterized in that, The second bus uses the EPMC bus.

8. The electric melt servo system as described in claim 4, characterized in that, One servo motor is equipped with one encoder.

9. The electric melt servo system as described in claim 2, characterized in that, The rectifier module is equipped with a PLC, and the PLC is equipped with the first communication interface, the second communication interface, and the protocol conversion module.

10. The electric melt servo system according to any one of claims 1 to 9, characterized in that, The electric melting servo system is used for electric melting.

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