Dry vacuum pump control system and control method

Abstract

The invention provides a dry vacuum pump control system and method, and belongs to the field of vacuum pump control. Comprising a first breaker and a second breaker, the first breaker is connected with a switching power supply, and the switching power supply is connected with a main controller; the second circuit breaker is connected with a plurality of input filters, the plurality of input filters are connected with corresponding frequency converters, and the plurality of frequency converters control corresponding motors to work; a plurality of sensors are arranged on the vacuum pump body, acquisition of the sensors can be flexibly configured, the sensors are used for monitoring the running state of the vacuum pump in the working process in real time, and the main controller controls the frequency converter to work according to running state data of the vacuum pump. The sensors can be flexibly configured, which means that a user can adjust monitoring points according to actual requirements to adapt to vacuum pumps of different models or specifications and different working environment requirements, so that the expandability and adaptability of the system are greatly improved.

Description

Technical Field

[0001] The invention belongs to the field of vacuum pump control, and in particular relates to a dry vacuum pump control system and a control method. Background Art

[0002] Existing vacuum pump manufacturers face many challenges in the design and application of their main control systems. Since different series of products use a variety of control panels, although these control panels achieve the same or similar goals in terms of function, the wide variety of control panels undoubtedly brings great inconvenience to production, commissioning and subsequent maintenance. Whenever a new series of vacuum pumps is launched, it is necessary to re-familiarize and master the corresponding control panels, which undoubtedly increases the learning cost and time cost of technicians.

[0003] More importantly, the design of these control panels in terms of human-computer interaction is often unsatisfactory. The interface is not intuitive enough and the operation is not simple enough, all of which lead to a decline in user experience. When using vacuum pumps, users need to spend more time and energy to familiarize themselves with and adapt to these control panels, which undoubtedly reduces work efficiency and affects user satisfaction with the product.

[0004] At the same time, weak anti-interference ability is also a major pain point of the current main control system. In a complex industrial environment, various electromagnetic interference sources emerge in an endless stream. If the anti-interference ability of the main control system is insufficient, it is easy to cause equipment failure or misoperation, thus affecting the normal production. This will not only cause economic losses to manufacturers, but may also affect customer trust and loyalty.

[0005] In summary, the main control systems of existing vacuum pump manufacturers have obvious problems in debugging and maintenance difficulty, human-machine interaction, and anti-interference ability. These problems not only affect the performance of the product and user experience, but also restrict the market competitiveness and sustainable development capabilities of the manufacturers. Therefore, manufacturers urgently need to seek a more advanced and more efficient main control system solution to cope with the increasingly fierce market competition and the ever-increasing user needs. Summary of the invention

[0006] The purpose of the present invention is to overcome the problems of difficult debugging and maintenance and weak anti-interference ability of the control system of the existing vacuum pump, and to provide a dry vacuum pump control system and control method.

[0007] In order to achieve the above object, the present invention adopts the following technical solution: A dry vacuum pump control system includes a first circuit breaker and a second circuit breaker, wherein the first circuit breaker is connected to a switch power supply, which is connected to a main controller; the second circuit breaker is connected to a plurality of input filters, which are connected to corresponding frequency converters, and the plurality of frequency converters control the operation of corresponding motors; A plurality of sensors are arranged on the vacuum pump body, and each sensor can collect data flexibly. The sensors are used to monitor the operating status of the vacuum pump in real time during operation, and the main controller controls the operation of the frequency converter according to the operating status data of the vacuum pump.

[0008] It comprises a three-phase power supply, wherein the three-phase power supply provides two-phase weak electricity for the first circuit breaker, and the three-phase power supply provides three-phase strong electricity for the second circuit breaker.

[0009] The switching power supply is used to convert the alternating current of the three-phase power supply into direct current as the power input of the main controller.

[0010] The input filter includes a first input filter and a second input filter. The first input filter is connected to the first frequency converter, and the first frequency converter controls the operation of the lower pump motor; the second input filter is connected to the second frequency converter, and the second frequency converter controls the operation of the upper pump motor; the input filter is used to filter out noise and interference signals generated during the operation of the power supply and the frequency converter, and the frequency converter is used to adjust the speed of the motor, thereby adjusting the suction capacity and efficiency of the vacuum pump.

[0011] The sensors include but are not limited to a pump casing temperature sensor, a water flow collection sensor, a nitrogen flow collection sensor, an exhaust pressure collection sensor and a pump internal temperature sensor; The pump casing temperature sensor is used to monitor the temperature of the pump casing and send real-time temperature data of the pump casing to the main controller; The water flow collection sensor is used to monitor the change of water flow in the pump and send real-time data of the water flow in the pump to the main controller; The nitrogen flow rate collection sensor is used to monitor the flow rate of nitrogen in the pump and send real-time data of nitrogen flow rate to the main controller; The exhaust pressure acquisition sensor is used to monitor the exhaust pressure and send real-time data of the exhaust pressure to the main controller; The temperature sensor in the pump is used to monitor the temperature in the pump and send real-time data of the temperature in the pump to the main controller.

[0012] The main controller comprises: A data acquisition module is used to acquire data collected by each sensor; Data processing and analysis module: used to verify and filter the received sensor data to ensure the accuracy and reliability of the data; Control decision module: Make control decisions based on processed data; Fault detection and alarm module: monitors sensor data in real time. If the sensor data is abnormal, an alarm signal is triggered and the automatic restart function is triggered.

[0013] The main controller is connected with a touch screen and a switch, and local control of the vacuum pump is achieved through touch, and remote control of the vacuum pump is achieved through the switch.

[0014] A dry vacuum pump control method, the local control method is as follows: Close the first circuit breaker and the second circuit breaker, switch the power supply to power the main controller, set the initial operating parameters of the motor, and the main controller sends a control signal to the frequency converter according to the set operating parameters. The frequency converter adjusts the speed of the corresponding motor and starts the vacuum pump to start pumping. Each sensor collects parameter information during the operation of the vacuum pump in real time, and the main controller controls the operation of the frequency converter according to the sensor data.

[0015] The main controller controls the inverter as follows: Each sensor collects parameter information during the operation of the vacuum pump in real time. The data acquisition and transmission module transmits the data collected by each sensor to the main controller. The data processing and analysis module verifies and filters the received sensor data. The control decision module collects the data of the exhaust pressure sensor and determines whether the lower pump motor has reached the preset pressure value. If it has not reached the preset value, it continues to monitor and adjust the speed of the lower pump motor. When the lower pump motor reaches the preset pressure value, the main controller starts the upper pump motor through the second inverter, and the upper pump motor starts working and performs the vacuum operation together with the lower pump motor.

[0016] The remote control method is as follows: Turn on the control switch, the remote monitoring interface displays the various parameters and status of the current system, set the initial operating parameters of the motor on the remote monitoring interface, and transmit the remote control command to the main controller. The main controller sends a control signal to the inverter according to the set operating parameters. The inverter adjusts the speed of the corresponding motor and starts the vacuum pump to start pumping. Each sensor collects parameter information during the operation of the vacuum pump in real time, and the main controller controls the operation of the inverter according to the sensor data.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a control system and control method for a dry vacuum pump, comprising a first circuit breaker and a second circuit breaker, wherein the first circuit breaker is connected to a switching power supply, and the switching power supply is connected to a main controller; the second circuit breaker is connected to a plurality of input filters, and the plurality of input filters are connected to corresponding frequency converters, and the plurality of frequency converters control the corresponding motors to work; a plurality of sensors are arranged on the pump body of the vacuum pump, and each sensor acquisition can be flexibly configured, and the sensor is used to monitor the operating state of the vacuum pump in real time during operation, and the main controller controls the frequency converter to work according to the state data of the vacuum pump operation. By introducing the first circuit breaker and the second circuit breaker, the system realizes a dual protection mechanism of the power supply, effectively enhances the electrical safety of the system, and can quickly cut off the power supply in abnormal situations such as short circuit or overload, so as to protect the safety of equipment and personnel; by adding the input filter, the anti-interference of the system is enhanced, and a modular design is adopted, and different motors are respectively controlled by multiple input filters and frequency converters, so that the configuration of the vacuum pump system is more flexible. At the same time, the sensor can be flexibly configured, which means that the user can adjust the monitoring point according to actual needs, adapt to vacuum pumps of different models or specifications, and different working environment requirements, and greatly improve the scalability and adaptability of the system. Through the intelligent monitoring and management mode realized by the main controller and the precise control of the motor's operating parameters, the system can dynamically adjust the power output according to the actual working needs, avoiding unnecessary energy waste. It not only improves the working efficiency of the vacuum pump, but also can timely detect and warn potential faults, extend the service life of the equipment, and reduce maintenance costs.

[0018] Furthermore, the three-phase power supply provides two phases of weak electricity for the first circuit breaker, and the three-phase power supply provides three phases of strong electricity for the second circuit breaker. The strong and weak electricity are separated, so when a load fails, it is easier to locate and solve the problem.

[0019] Furthermore, the touch screen can view the operating status of the system in real time, provide better human-computer interaction, and facilitate testing and on-site control.

[0020] Furthermore, by setting an automatic restart function in the dry vacuum pump control system, the reliability and stability of the equipment can be significantly improved, the downtime due to failures can be reduced, and the production efficiency can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a system block diagram of the present invention; Explanation of the reference numerals in the figure: 1. first circuit breaker; 2. second circuit breaker; 3. switching power supply; 4. main controller; 5. first input filter; 6. second input filter; 7. first frequency converter; 8. second frequency converter; 9. touch screen; 10. switch; 11. lower pump motor; 12. upper pump motor; 13. frequency converter self-temperature control valve body. DETAILED DESCRIPTION

[0022] In order to further understand the content of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the embodiments are only for explaining the present invention and are not intended to limit it.

[0023] like Figure 1 As shown, a dry vacuum pump control system has the following structure: Includes a three-phase power supply to provide stable power input for the entire control system.

[0024] The three-phase power supply connects the first circuit breaker 1 and the second circuit breaker 2. The first circuit breaker 1 is connected to the switching power supply 3. The switching power supply 3 is connected to the main controller 4. The first circuit breaker 1 serves as the power switch of the main controller 4 and is responsible for controlling the power on and off of the entire control system. The second circuit breaker 2 controls the power supply of the first input filter 5 and the second input filter 6. The first input filter 5 is connected to the first frequency converter 7. The second input filter 6 is connected to the second frequency converter 8. The main controller 4 is connected to the first frequency converter 7 and the second frequency converter 8. The first frequency converter 7 controls the operation of the lower pump motor 11, and the second frequency converter 8 controls the operation of the upper pump motor 12.

[0025] Preferably, the switching power supply 3 is arranged between the first circuit breaker 1 and the main controller 4 , and is used to convert the three-phase electricity into direct current suitable for use by the main controller 4 .

[0026] Preferably, the first input filter 5 and the second input filter 6 are used to filter the power supply, reduce the harmonics and noise in the power supply, protect the inverter from the influence of power supply fluctuation and noise, and ensure the stable operation of the subsequent first inverter 7 and the second inverter 8; the first inverter 7 and the second inverter 8 generate a large amount of high-frequency noise and electromagnetic interference during operation, which will not only affect the stability of the system, but also may interfere with the surrounding electronic equipment. The filter can effectively filter out these high-frequency noise and interference signals to ensure the stable operation of the electrical system. At the same time, the filter can also prevent the harmonics in the power grid from damaging the inverter and improve the reliability of the equipment.

[0027] Preferably, the main controller 4 and the frequency converter communicate with each other through an RS485 hub, which can eliminate common-mode interference, improve bus stability, extend the communication distance, and increase the number of bus nodes.

[0028] Preferably, by adjusting the output frequencies of the first frequency converter 7 and the second frequency converter 8, precise control of the rotational speeds of the lower pump motor 11 and the upper pump motor 12 can be achieved, thereby adjusting the suction capacity and efficiency of the vacuum pump; in the present invention, several groups of frequency converters and corresponding motors can be set according to needs, which are suitable for single pumps, double pumps or three-layer stacked pumps, and can be compatible with mainstream pump types on the market.

[0029] Furthermore, the second frequency converter 8 is connected to the corresponding frequency converter self-temperature control valve body 13, and the frequency converter self-temperature control valve body 13 controls the opening and closing of the second frequency converter 8 according to its own temperature.

[0030] Preferably, the main controller 4 is the core of the entire control system, responsible for receiving instructions from external sensor data and the touch screen 9 operation interface, and accurately controlling the frequency converter through the control module according to these instructions.

[0031] The pump body can be provided with corresponding sensors according to actual working requirements to provide real-time working status data to the main controller 4. Each sensor acquisition module can be flexibly configured according to on-site requirements, including but not limited to: Pump casing temperature sensor: used to monitor the temperature of the pump casing and send real-time temperature data of the pump casing to the main controller 4 to prevent equipment damage or performance degradation due to overheating; Water flow collection sensor: used to monitor the change of water flow in the pump and send real-time data of water flow in the pump to the main controller 4, which is crucial to ensure the normal operation of the water cooling system; Nitrogen flow collection sensor: used to monitor the flow of nitrogen in the pump and send real-time data of nitrogen flow to the main controller 4 to ensure the effectiveness of nitrogen; Exhaust pressure acquisition sensor: used to monitor the exhaust pressure and send real-time data of the exhaust pressure to the main controller 4 to ensure that the vacuum pump operates efficiently within the set pressure range; Pump temperature sensor: used to monitor the temperature inside the pump and send real-time data of the temperature inside the pump to the main controller 4 to prevent overheating and optimize the performance and efficiency of the pump.

[0032] Furthermore, the main controller 4 includes: Data acquisition module: used to acquire data collected by each sensor. The main controller 4 has several input channels for receiving different sensor data; Data processing and analysis module: used to verify and filter the received sensor data to ensure the accuracy and reliability of the data; Control decision module: Make control decisions based on the processed data. For example, if the temperature of the pump housing is too high, the main controller 4 will reduce the output frequency of the inverter to reduce the load of the pump and reduce the temperature. If the exhaust pressure is too high, the main controller 4 will increase the output frequency of the inverter to improve the pumping capacity of the pump; Fault detection and alarm module: If the sensor data is abnormal (such as temperature is too high, flow is too low, etc.), the main controller 4 will trigger an alarm signal and trigger the automatic restart function to prevent equipment damage.

[0033] Further, the main controller 4 is connected to the touch screen 9 and the switch 10; Through the touch screen 9, the user can realize local control of the vacuum pump. The touch screen 9 provides an intuitive user interface, allowing the user to easily monitor and control the operating status of the vacuum pump. The user can set and modify the operating parameters of the device, such as the pumping speed, pressure setting value, etc., through the touch screen 9, and view the operating status and various parameters of the device in real time. This local control method enables the user to directly and accurately control the device, improving the response speed and operating efficiency of the system.

[0034] The switch 10 provides the user with the option of remote control. The switch 10 includes multiple functional switches such as a switch for controlling the operation of the sensor, an external emergency stop switch, and an air intake gate valve switch. These switches allow the user to control and monitor the device at a location far away from the device. For example, by controlling the switch for the operation of the sensor, the user can remotely start or stop the sensor to monitor the operating status of the device or environmental changes. The external emergency stop switch provides a means of emergency stopping the device. When the device fails or an emergency occurs, the user can quickly press the emergency stop switch to force the device to stop working to protect the safety of the equipment and personnel. The air intake gate valve switch is used to control the air intake volume of the vacuum pump, thereby adjusting the exhaust speed and pressure of the equipment.

[0035] In particular, when a vacuum pump device fails, the role of the external emergency stop switch is particularly important. By turning on the emergency stop switch, the user can immediately cut off the power supply of the device and stop the device from running, thereby preventing the failure from further expanding or causing more serious consequences. This emergency stop function ensures the safety and reliability of the equipment in emergency situations.

[0036] Embodiment 2: A dry vacuum pump control method comprises the following steps: When performing local control, confirm that the three-phase power supply has been connected, close the first circuit breaker 1 and the second circuit breaker 2, the first circuit breaker 1 supplies power to the switching power supply 3 and the main controller 4, and the second circuit breaker 2 supplies power to the first input filter 5 and the second input filter 6; The switch power supply 3 converts the AC power of the three-phase power supply into DC power to supply power to the main controller 4. The main controller 4 is initialized and the initial operating parameters of the lower pump motor 11 are set through the touch screen 9, including the target speed, the pressure setting value, etc. The main controller 4 receives the user's instruction and sends a control signal to the first frequency converter 7. The first frequency converter 7 adjusts the speed of the lower pump motor 11 and starts the vacuum pump to start pumping. During the vacuum pumping process, each sensor collects parameter information during the operation of the vacuum pump in real time. The data acquisition and transmission module transmits the data collected by each sensor to the main controller 4. The data processing and analysis module verifies and filters the received sensor data. The control decision module collects the data of the exhaust pressure sensor and determines whether the lower pump motor 11 has reached the preset pressure value. If it has not reached the preset value, it continues to monitor and adjust the speed of the lower pump motor 11. When the lower pump motor 11 reaches the preset pressure value, the main controller 4 starts the upper pump motor 12 through the second frequency converter 8. The upper pump motor 12 starts working and performs the vacuum operation together with the lower pump motor 11. The system continues to monitor the data of all sensors to ensure that the vacuum pump runs stably within the set parameter range. When the system needs to be stopped, a stop command is sent to the main controller 4 through the touch screen 9. The main controller 4 controls the motor to gradually slow down and finally stop working through the frequency converter.

[0037] Preferably, the three-phase power supply provides two phases of weak electricity for the first circuit breaker 1 and three phases of strong electricity for the second circuit breaker 2. By providing different quantities and phases of power to different circuit breakers, the system can more flexibly adapt to various load requirements and improve overall efficiency and reliability. When a load fails, it can be easier to locate and solve the problem.

[0038] Embodiment 3: A dry vacuum pump remote control method comprises the following steps: The system is started through the remote control switch 10 (including the switch for controlling the operation of the sensor, the external emergency stop switch and the intake gate valve switch, etc.), and the remote monitoring interface displays various parameters and states of the current system. The initial operating parameters of the lower pump motor 11 are set on the remote monitoring interface, including the target speed, the preset pressure value, etc. The remote control command is transmitted to the main controller 4 through the RS485 hub, and the main controller 4 starts the lower pump motor 11 through the first inverter 7; The lower pump motor 11 starts working, the vacuum pump starts to pump air, the sensor collects data in real time, and transmits it to the main controller 4 through the data acquisition and transmission module. The main controller 4 verifies and filters the sensor data through the data processing and analysis module, and sends the processed data to the remote monitoring interface. The remote monitoring interface collects the data of the sensor based on the exhaust pressure to determine whether the lower pump motor 11 has reached the preset pressure value. If it has not reached the preset value, it continues to monitor and adjust the speed of the lower pump motor 11. When the lower pump motor 11 reaches the preset pressure value, the remote monitoring interface sends an instruction to the main controller 4. The main controller 4 starts the upper pump motor 12 through the second frequency converter 8. The upper pump motor 12 starts working and performs the pumping operation together with the lower pump motor 11. The system continues to monitor the data of all sensors to ensure that the vacuum pump operates stably within the set parameter range, and sends the data to the remote monitoring interface in real time.

[0039] When the system needs to be stopped, a stop command is sent to the main controller 4 through the remote control switch 10. The main controller 4 controls the motor to gradually decelerate and eventually stop working through the frequency converter.

[0040] Preferably, in any case, if an emergency or failure occurs, the power supply of the device can be immediately cut off by the external emergency stop switch in the remote control switch 10 to stop the device from running.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A dry vacuum pump control system, characterized in that: The device comprises a first circuit breaker (1) and a second circuit breaker (2), wherein the first circuit breaker (1) is connected to a switching power supply (3), and the switching power supply (3) is connected to a main controller (4); the second circuit breaker (2) is connected to a plurality of input filters, and the plurality of input filters are connected to corresponding frequency converters, and the plurality of frequency converters control the operation of corresponding motors; A plurality of sensors are arranged on the vacuum pump body, and each sensor can collect data in a flexible manner. The sensors are used to monitor the operating status of the vacuum pump in real time during operation. The main controller (4) controls the operation of the frequency converter according to the operating status data of the vacuum pump.

2. A dry vacuum pump control system according to claim 1, characterized in that: It comprises a three-phase power supply, wherein the three-phase power supply provides two-phase weak electricity for a first circuit breaker (1), and the three-phase power supply provides three-phase strong electricity for a second circuit breaker (2).

3. A dry vacuum pump control system according to claim 2, characterized in that: The switching power supply (3) is used to convert the alternating current of the three-phase power supply into direct current as the power input of the main controller (4).

4. A dry vacuum pump control system according to claim 1, characterized in that: The input filter comprises a first input filter (5) and a second input filter (6); the first input filter (5) is connected to a first frequency converter (7), and the first frequency converter (7) controls the operation of the lower pump motor (11); the second input filter (6) is connected to a second frequency converter (8), and the second frequency converter (8) controls the operation of the upper pump motor (12); the input filter is used to filter out noise and interference signals generated during the operation of the power supply and the frequency converter, and the frequency converter is used to adjust the rotation speed of the motor, thereby adjusting the suction capacity and efficiency of the vacuum pump.

5. A dry vacuum pump control system according to claim 1, characterized in that: The sensors include but are not limited to a pump casing temperature sensor, a water flow collection sensor, a nitrogen flow collection sensor, an exhaust pressure collection sensor and a pump internal temperature sensor; The pump casing temperature sensor is used to monitor the temperature of the pump casing and send real-time temperature data of the pump casing to the main controller (4); The water flow collection sensor is used to monitor the change of the water flow in the pump and send real-time data of the water flow in the pump to the main controller (4); The nitrogen flow rate collection sensor is used to monitor the flow rate of nitrogen in the pump and send real-time data of the nitrogen flow rate to the main controller (4); The exhaust pressure acquisition sensor is used to monitor the exhaust pressure and send real-time data of the exhaust pressure to the main controller (4); The temperature sensor inside the pump is used to monitor the temperature inside the pump and send real-time data of the temperature inside the pump to the main controller (4).

6. A dry vacuum pump control system according to claim 5, characterized in that: The main controller (4) comprises: A data acquisition module is used to acquire data collected by each sensor; Data processing and analysis module: used to verify and filter the received sensor data to ensure the accuracy and reliability of the data; Control decision module: Make control decisions based on processed data; Fault detection and alarm module: monitors sensor data in real time. If the sensor data is abnormal, an alarm signal is triggered and the automatic restart function is triggered.

7. A dry vacuum pump control system according to claim 1, characterized in that: The main controller (4) is connected to a touch screen (9) and a switch (10); local control of the vacuum pump is achieved through the touch screen (9), and remote control of the vacuum pump is achieved through the switch (10).

8. A dry vacuum pump control method as claimed in claims 1 to 7, characterized in that: The local control method is as follows: The first circuit breaker (1) and the second circuit breaker (2) are closed, the switch power supply (3) supplies power to the main controller (4), the initial operating parameters of the motor are set, the main controller (4) sends a control signal to the frequency converter according to the set operating parameters, the frequency converter adjusts the speed of the corresponding motor, and starts the vacuum pump to start pumping; each sensor collects parameter information during the operation of the vacuum pump in real time, and the main controller (4) controls the operation of the frequency converter according to the sensor data.

9. A dry vacuum pump control method according to claim 8, characterized in that: The main controller (4) controls the inverter in the following way: Each sensor collects parameter information during the operation of the vacuum pump in real time. The data collection and transmission module transmits the data collected by each sensor to the main controller (4). The data processing and analysis module verifies and filters the received sensor data. The control decision module determines whether the lower pump motor (11) has reached a preset pressure value based on the data of the exhaust pressure collection sensor. If the preset value has not been reached, the rotation speed of the lower pump motor (11) continues to be monitored and adjusted. When the lower pump motor (11) reaches the preset pressure value, the main controller (4) starts the upper pump motor (12) through the second frequency converter (8). The upper pump motor (12) starts to work and performs a vacuum operation together with the lower pump motor (11).

10. A dry vacuum pump control method according to claim 8, characterized in that: The remote control method is as follows: When the control switch (10) is turned on, the remote monitoring interface displays various parameters and states of the current system. The initial operating parameters of the motor are set on the remote monitoring interface. The remote control command is transmitted to the main controller (4). The main controller (4) sends a control signal to the frequency converter according to the set operating parameters. The frequency converter adjusts the speed of the corresponding motor and starts the vacuum pump to start pumping. The various sensors collect parameter information during the operation of the vacuum pump in real time. The main controller (4) controls the operation of the frequency converter according to the sensor data.

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