Frequency converter control system

Abstract

The utility model discloses a frequency converter control system, and aims to solve the problems of complex structure and low working efficiency of a conventional frequency converter. The system comprises a frequency converter main circuit module, a switching power supply module, a PLC module, a display screen module and a temperature control module. The main circuit module is composed of a transformer and a frequency converter set, and the transformer is connected with external alternating current and the switching power supply module and supplies power to the system. The switching power supply module supplies power to the PLC module, the display screen module and the temperature control module, and stable operation of all the modules is ensured. The PLC module serves as a core control unit and is connected with the frequency converter set, the display screen module and the temperature control module, and accurate control over the motor and real-time monitoring of the system state are achieved. The display screen module is used for displaying operation parameters, and the temperature control module is responsible for monitoring and adjusting the equipment temperature.

Description

Technical Field

[0001] This utility model relates to the field of frequency converter technology, and specifically to a frequency converter control system. Background Technology

[0002] With the continuous development of industrial automation and electric drive technology, frequency converters are increasingly widely used in various equipment. Frequency converters are mainly used to control the speed and power of motors, achieving precise adjustment of the motor's operating state by changing the frequency of the input power supply, thereby meeting the diverse needs of motor drives in different industrial scenarios.

[0003] However, existing frequency converters have complex structures, typically consisting of multiple independent components such as the main circuit, control circuit, and power supply module. The connection and coordinated operation of these components require complex wiring and debugging processes. This complex structure not only increases the size and cost of the equipment but also reduces the reliability and stability of the system. Utility Model Content

[0004] To address the problem of the complex structure of existing frequency converter control systems, this invention provides a frequency converter control system. The specific technical solution of this invention is as follows:

[0005] A frequency converter control system includes: a frequency converter main circuit module, a switching power supply module, a PLC module, a display screen module, and a temperature control module. The frequency converter main circuit module includes a transformer and a frequency converter group. The transformer is connected to an external AC power supply and the switching power supply module. The switching power supply module is connected to the PLC module, the display screen module, and the temperature control module. The PLC module is connected to the frequency converter group, the display screen module, and the temperature control module. The frequency converter group is connected to an external AC power supply and an external motor group.

[0006] Furthermore, the frequency converter control system also includes a circuit breaker C100, the input terminal of which is connected to an external AC power source, and the output terminal of which is connected to the input terminal of the transformer and the frequency converter group.

[0007] Furthermore, the inverter group includes a main inverter and an auxiliary inverter connected in parallel.

[0008] Furthermore, the main inverter is model MD500T37G, the three-phase power input terminal of the main inverter is connected to the circuit breaker C100, the three-phase motor output terminal is connected to the motor in the external electrode group, and the control terminal is connected to the PLC module.

[0009] Furthermore, the auxiliary frequency converter is model MD310T3.7B. The three-phase power input terminal of the auxiliary frequency converter is connected to the circuit breaker C100, the three-phase motor output terminal is connected to the motor in the external electrode group, and the control terminal is connected to the PLC module.

[0010] Furthermore, the PLC module is a PLC analog signal expansion module, and the model of the PLC analog signal expansion module is GL10-4DA.

[0011] Furthermore, the switching power supply module includes a circuit breaker C10 and a switching power supply S. The input terminal of the circuit breaker C10 is connected to the transformer, and the output terminal is connected to the PLC module. The input terminal of the switching power supply S is connected to the output terminal of the circuit breaker, and the output terminal is connected to the PLC module, the display module, and the temperature control module, respectively.

[0012] Furthermore, the display module is a touch display module, and the model of the touch display module is IT7100E.

[0013] Furthermore, the temperature control module is a WK8H temperature control module. The input terminal of the WK8H temperature control module is connected to an external thermocouple, the output terminal is connected to an external heating module and an external heat dissipation module, and the communication terminal is connected to a PLC module.

[0014] Furthermore, the frequency converter control system also includes a PLC expansion module, the model of which is H3U-1616MT-XP, and the PLC expansion module is connected to the PLC module.

[0015] Compared with existing technologies, the advantages of this utility model are as follows: By organically integrating the inverter main circuit module, switching power supply module, PLC module, display screen module, and temperature control module, the independence between components is reduced, avoiding complex wiring and tedious debugging processes. This integrated structural design makes the entire inverter control system more compact, smaller in size, and easier to install and maintain. Simultaneously, the modular design improves the system's reliability and stability, reducing the risk of equipment downtime due to component connection failures. The switching power supply module in this system provides a stable power supply to the PLC module, display screen module, and temperature control module, ensuring that each module operates efficiently and stably during operation. As the core control unit, the PLC module can adjust the inverter's output frequency and power in real time according to the load changes and operating status of the external motor group, achieving precise control of the motor. This flexible control method allows the inverter to maintain high operating efficiency under different working conditions, reducing energy loss. Furthermore, the temperature control module can monitor the inverter's internal temperature in real time and automatically adjust heat dissipation measures according to temperature changes, ensuring the equipment operates within the optimal temperature range, further improving the inverter's efficiency and service life. Attached Figure Description

[0016] Figure 1 This is a wiring diagram of the inverter main circuit module in one embodiment of the present invention;

[0017] Figure 2 This is a wiring diagram of the frequency converter group in one embodiment of the present invention;

[0018] Figure 3 This is a wiring diagram of the switching power supply module in one embodiment of the present invention;

[0019] Figure 4 This is a wiring diagram of the PLC module in one embodiment of the present invention;

[0020] Figure 5 This is a wiring diagram of the display module in one embodiment of the present invention;

[0021] Figure 6 This is a wiring diagram of the temperature control module in one embodiment of the present invention;

[0022] Figure 7 This is a wiring diagram of the PLC expansion module in one embodiment of the present invention. Detailed Implementation

[0023] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.

[0024] In the description of this utility model, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this utility model.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. Thus, the use of "first" and "second" to define a feature may explicitly or implicitly include one or more of that feature, and in this description of the utility model, "at least" means one or more, unless otherwise explicitly specified.

[0026] In this utility model, unless otherwise explicitly specified and limited, the terms "assembly," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can also refer to a mechanical connection; they can refer to a direct connection or a connection through an intermediate medium; or they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] In utility models, unless otherwise specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "below," and "over" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Above," "below," and "below" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0028] The following description, in conjunction with the accompanying drawings, further illustrates specific embodiments of the present invention, making the technical solution and beneficial effects of the present invention clearer and more explicit. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0029] like Figures 1 to 7 As shown, a frequency converter control system includes: a frequency converter main circuit module, a switching power supply module, a PLC module, a display module, and a temperature control module. The frequency converter main circuit module includes a transformer and a frequency converter assembly. The transformer is connected to both an external AC power supply and the switching power supply module. The switching power supply module is connected to the PLC module, the display module, and the temperature control module. The PLC module is connected to the frequency converter assembly, the display module, and the temperature control module. The frequency converter assembly is connected to both the external AC power supply and an external motor assembly. The transformer adjusts the external AC power to a set voltage, for example, converting 380V AC to 220V AC. The switching power supply module converts the set voltage AC power to a lower voltage DC power supply to power the PLC module, the display module, and the temperature control module, for example, converting 220V AC to 24V DC. The display module displays the motor's operating status, including speed, torque, temperature, and direction of rotation, and also inputs control information to the PLC module to control the motor's speed and direction. The PLC module sends analog signals to the frequency converter group based on the input control information or the set program, enabling the frequency converter group to use vector control technology to achieve high-precision speed and torque control of the motor. The temperature control module detects the operating temperature of the motor and cools the motor accordingly.

[0030] As one embodiment, the frequency converter control system further includes a circuit breaker C100, the input terminal of which is connected to an external AC power supply, and the output terminal of which is connected to the input terminal of a transformer and the frequency converter group.

[0031] In one embodiment, the frequency converter group includes a main frequency converter and an auxiliary frequency converter connected in parallel. The main frequency converter controls the main working motor (such as the main water pump) and bears the main load. The auxiliary frequency converter controls the auxiliary motor (such as a standby pump or a small-flow pump) to achieve redundancy or segmented regulation.

[0032] In one embodiment, the main inverter is model MD500T37G. The three-phase power input terminal of the main inverter is connected to the circuit breaker C100, the three-phase motor output terminal is connected to the motor in the external electrode group, and the control terminal is connected to the PLC module.

[0033] In one embodiment, the auxiliary frequency converter is model MD310T3.7B. The three-phase power input terminal of the auxiliary frequency converter is connected to the circuit breaker C100, the three-phase motor output terminal is connected to the motor in the external electrode group, and the control terminal is connected to the PLC module.

[0034] In one embodiment, the PLC module is a PLC analog signal expansion module, and the model of the PLC analog signal expansion module is GL10-4DA.

[0035] In one embodiment, the switching power supply module includes a circuit breaker C10 and a switching power supply S. The input terminal of the circuit breaker C10 is connected to a transformer, and the output terminal is connected to a PLC module. The input terminal of the switching power supply S is connected to the output terminal of the circuit breaker, and the output terminal is connected to the PLC module, the display module, and the temperature control module, respectively.

[0036] In one embodiment, the display module is a touch display module, and the model of the touch display module is IT7100E.

[0037] In one embodiment, the temperature control module is a WK8H temperature control module. The input terminal of the WK8H temperature control module is connected to an external thermocouple, the output terminal is connected to an external heating module and an external heat dissipation module, and the communication terminal is connected to a PLC module. The external thermocouples include: general-purpose thermocouples (such as type K thermocouples), conventional machine head thermocouples, rabbit-pair machine head thermocouples, and membrane thermocouples. The external heating modules correspond one-to-one with the external thermocouples and include: general-purpose heaters, conventional machine head heaters, rabbit-pair machine head heaters, and membrane heaters. The external heat dissipation module is an air-cooled radiator.

[0038] In one embodiment, the frequency converter control system further includes a PLC expansion module, the model of which is H3U-1616MT-XP, and the PLC expansion module is connected to the PLC module.

[0039] This application describes a system that organically integrates the inverter's main circuit module, switching power supply module, PLC module, display screen module, and temperature control module. This reduces the independence between components and avoids complex wiring and tedious debugging processes. This integrated design makes the entire inverter control system more compact, smaller in size, and easier to install and maintain. Simultaneously, the modular design improves system reliability and stability, reducing the risk of equipment downtime due to component connection failures. The switching power supply module in this system provides a stable power supply to the PLC module, display screen module, and temperature control module, ensuring efficient and stable operation of each module. The PLC module, as the core control unit, can adjust the inverter's output frequency and power in real time according to the load changes and operating status of the external motor group, achieving precise motor control. This flexible control method allows the inverter to maintain high efficiency under different operating conditions, reducing energy loss. Furthermore, the temperature control module can monitor the inverter's internal temperature in real time and automatically adjust heat dissipation measures according to temperature changes, ensuring the equipment operates within the optimal temperature range, further improving the inverter's efficiency and service life.

[0040] In the description of this specification, the terms "in one embodiment," "preferred," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. The illustrative expressions of the above terms in this specification do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples. The connection methods linked in the description of this specification have significant effects and practical utility.

[0041] Based on the above description of the structure and principle, those skilled in the art should understand that this utility model is not limited to the specific embodiments described above. Improvements and substitutions based on this utility model using techniques known in the art all fall within the protection scope of this utility model and should be defined by the claims.

Claims

1. A frequency converter control system, characterized in that, include: The system comprises a frequency converter main circuit module, a switching power supply module, a PLC module, a display screen module, and a temperature control module. The frequency converter main circuit module includes a transformer and a frequency converter assembly. The transformer is connected to an external AC power supply and the switching power supply module. The switching power supply module is connected to the PLC module, the display screen module, and the temperature control module. The PLC module is connected to the frequency converter assembly, the display screen module, and the temperature control module. The frequency converter assembly is connected to an external AC power supply and an external motor assembly.

2. The frequency converter control system according to claim 1, characterized in that, The frequency converter control system also includes a circuit breaker C100, the input terminal of which is connected to an external AC power source, and the output terminal of which is connected to the input terminal of a transformer and the frequency converter group.

3. The frequency converter control system according to claim 2, characterized in that, The inverter group includes a main inverter and an auxiliary inverter connected in parallel.

4. The frequency converter control system according to claim 3, characterized in that, The main inverter is model MD500T37G. The three-phase power input terminal of the main inverter is connected to the circuit breaker C100, the three-phase motor output terminal is connected to the motor in the external electrode group, and the control terminal is connected to the PLC module.

5. The frequency converter control system according to claim 4, characterized in that, The auxiliary frequency converter is model MD310T3.7B. The three-phase power input terminal of the auxiliary frequency converter is connected to the circuit breaker C100, the three-phase motor output terminal is connected to the motor in the external electrode group, and the control terminal is connected to the PLC module.

6. The frequency converter control system according to claim 5, characterized in that, The PLC module is a PLC analog signal expansion module, and the model of the PLC analog signal expansion module is GL10-4DA.

7. The frequency converter control system according to claim 6, characterized in that, The switching power supply module includes a circuit breaker C10 and a switching power supply S. The input terminal of the circuit breaker C10 is connected to the transformer, and the output terminal is connected to the PLC module. The input terminal of the switching power supply S is connected to the output terminal of the circuit breaker, and the output terminal is connected to the PLC module, the display module, and the temperature control module, respectively.

8. The frequency converter control system according to claim 7, characterized in that, The display module is a touch display module, and the model of the touch display module is IT7100E.

9. The frequency converter control system according to claim 8, characterized in that, The temperature control module is a WK8H temperature control module. The input terminal of the WK8H temperature control module is connected to an external thermocouple, the output terminal is connected to an external heating module and an external heat dissipation module, and the communication terminal is connected to a PLC module.

10. The frequency converter control system according to claim 5, characterized in that, The frequency converter control system also includes a PLC expansion module, model H3U-1616MT-XP, which is connected to the PLC module.

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