CN218953619U

CN218953619U - Molecular pump controller

Info

Publication number: CN218953619U
Application number: CN202223369185.2U
Authority: CN
Inventors: 邝宇
Original assignee: Guangzhou Electronic Technology Co Ltd
Current assignee: Guangzhou Electronic Technology Co Ltd
Priority date: 2022-12-15
Filing date: 2022-12-15
Publication date: 2023-05-02
Anticipated expiration: 2032-12-15

Abstract

The utility model discloses a molecular pump controller which comprises a power supply module, a filtering module, a brake resistor module, a direct current sampling module, an intelligent power module and a molecular pump which are sequentially coupled, wherein the output end of the direct current sampling module is also connected with the sampling end of a DSP module, the first control end of the DSP module is coupled with the controlled end of the brake resistor module, and the second control end of the DSP module is coupled with the controlled end of the intelligent power module. The beneficial effects of the utility model are as follows: the display module is coupled with the data interaction end of the DSP module. The utility model has the beneficial effects that: the brake resistor module, the direct current sampling module, the intelligent power module and other modules are integrated in a controller, so that the volume of the whole controller is obviously reduced; meanwhile, compared with a general frequency converter, the device is special for a molecular pump, so that a large number of redundant modules are reduced, an intelligent power module is adaptively increased, the manufacturing cost is reduced, and the economical efficiency of products is improved.

Description

Molecular pump controller

Technical Field

The utility model relates to the field of electronic controllers, in particular to a molecular pump controller.

Background

The molecular pump is a vacuum pump which uses a rotor rotating at a high speed to transfer momentum to gas molecules to obtain directional speed, so that the gas molecules are compressed and driven to an exhaust port to be pumped out for a front stage.

Most molecular pumps are driven by a universal frequency converter. Because the rated voltage of the molecular pump motor is lower, the current is larger, if the universal frequency converter is used for direct driving, a high-capacity frequency converter must be selected, otherwise, an intermediate frequency transformer must be added at the output end of the frequency converter for voltage reduction, so that the whole volume of the molecular pump product is larger, and the cost performance is low.

Disclosure of Invention

The utility model provides a molecular pump controller aiming at the problems, which mainly solves the problem that the existing molecular pump has no special controller.

In order to solve the technical problems, the technical scheme of the utility model is as follows:

the utility model provides a molecular pump controller, includes power module, filter module, brake resistance module, direct current sampling module, intelligent power module and the molecular pump of coupling in proper order, wherein, the output of direct current sampling module still inserts the sampling end of DSP module, the first control end of DSP module with the controlled end coupling of brake resistance module, the second control end of DSP module with the controlled end coupling of intelligent power module.

In some embodiments, the U-terminal and the W-terminal of the intelligent power module access the sampling terminal of the DSP module.

In some embodiments, a first temperature sensor is installed inside the molecular pump, and an output end of the first temperature sensor is connected to a sampling end of the DSP module.

In some embodiments, the power supply module, the filtering module, the braking resistor module, the direct current sampling module and the intelligent power module are packaged in the same shell, a second temperature sensor is installed in the shell, and the output end of the second temperature sensor is connected to the sampling end of the DSP module.

In some embodiments, an identification module is installed inside the molecular pump, and an output end of the identification module is connected to a sampling end of the DSP module.

In some embodiments, the data interaction end of the DSP module is coupled with an RS-485 interface.

In some embodiments, the system further comprises a reserved external control interface, wherein the external control interface is coupled with the data interaction end of the DSP module.

In some embodiments, a display module is also included, the display module coupled with the data interaction end of the DSP module.

The beneficial effects of the utility model are as follows: the brake resistor module, the direct current sampling module, the intelligent power module and other modules are integrated in a controller, so that the volume of the whole controller is obviously reduced; meanwhile, compared with a general frequency converter, the device is special for a molecular pump, so that a large number of redundant modules are reduced, an intelligent power module is adaptively increased, the manufacturing cost is reduced, and the economical efficiency of products is improved.

Drawings

Fig. 1 is a schematic circuit diagram of a molecular pump controller according to an embodiment of the present utility model.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and the detailed description below, in order to make the objects, technical solutions and advantages of the present utility model more clear and distinct. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the matters related to the present utility model are shown in the accompanying drawings.

The embodiment provides a molecular pump controller, as shown in fig. 1, including a power supply module 1, a filtering module 2, a brake resistor module 3, a direct current sampling module 4, an intelligent power module 5 and a molecular pump 6 which are coupled in sequence, wherein the output end of the direct current sampling module 4 is also connected with the sampling end of a DSP module 7, the first control end of the DSP module 7 is coupled with the controlled end of the brake resistor module 3, and the second control end of the DSP module 7 is coupled with the controlled end of the intelligent power module 5.

In the embodiment, the brake resistor module 3, the direct current sampling module 4, the intelligent power module 5 and other modules are integrated in a controller, so that the volume of the whole controller is obviously reduced; meanwhile, compared with a general frequency converter, the device is special for the molecular pump 6, so that a large number of redundant modules are reduced, the intelligent power module 5 is adaptively increased, the manufacturing cost is reduced, and the economical efficiency of products is improved.

In this embodiment, the power supply module 1 may use a 1kw power source, which uses a 220v ac input, a 96v dc output, and a 1kw power. The function is to supply power to the subsequent circuit. The main circuit of the power supply module 1 may further include a power thermistor for limiting a start-up surge current and a fuse for overcurrent protection.

The intelligent power module 5 (IPM) is a large-scale integrated module in which a driving circuit, a protection circuit and a power switching device are integrated together, and a power conversion part of the intelligent power module is a three-phase inverter bridge formed by overlapping six groups of IGBTs and freewheeling diodes, and inverts direct current into three-phase alternating current to be supplied to a motor. The application of the molecular pump requires a better braking performance, so that in this embodiment, the braking resistor module 3 should be composed of several parts, namely voltage sampling, power switching device and braking resistor.

The U end and the W end of the intelligent power module 5 are connected with the sampling end of the DSP module 7.

The interior of the molecular pump 6 is provided with a first temperature sensor 8, and the output end of the first temperature sensor 8 is connected with the sampling end of the DSP module 7. The temperature signal acquired by the first temperature sensor 8 is sent to the DSP module 7, and the DSP module 7 controls the power conversion of the intelligent power module 5 according to the received temperature signal.

The power supply module 1, the filtering module 2, the braking resistor module 3, the direct current sampling module 4 and the intelligent power module 5 are packaged in the same shell, a second temperature sensor 9 is installed in the shell, and the output end of the second temperature sensor 9 is connected to the sampling end of the DSP module 7. The second temperature sensor 9 functions as the first temperature sensor 8 and will not be described again. In addition, the software code for controlling the intelligent power module 5 to perform power conversion, which is burnt in the DSP module 7, is written by a technician, and its form may be various.

Preferably, the molecular pump 6 is internally provided with an identification module 10, and the output end of the identification module 10 is connected with the sampling end of the DSP module 7. Specifically, an interface may be reserved on the I/O port of the DSP module 7 as a sampling segment, and the output end of the identification module 10 is connected to the sampling end of the DSP module 7 through the interface. The DSP module 7 can automatically identify the model of the molecular pump 6, call the starting characteristic curve, the running characteristic curve and the braking characteristic curve of the corresponding model, receive remote control, upper computer control or key command control and MODBUS communication protocol through the data received by the sampling end of the DSP module 7, and of course, the characteristic curves and the control commands are all required to be burnt into the memory of the DSP module 7 in advance.

Optionally, the data interaction end of the DSP module 7 is coupled with the RS-485 interface 11, and the upper computer can communicate with the DSP module 7 through the RS-485 interface 11, because of the condition of communication burning.

Optionally, the system further comprises a reserved external control interface 12, and the external control interface 12 is coupled with the data interaction end of the DSP module 7. In the scheme, the external control interface 12 can be other communication interfaces except the RS-485 interface 11, so that the application range of the device in various industrial environments is improved.

Optionally, a display module 13 is further included, and the display module 13 is coupled to the data interaction end of the DSP module 7. In this solution, the display module 13 is used for displaying the state of the molecular pump 6 and controlling the start and stop of the molecular pump 6, and the displayed contents may be the running state, running data and fault condition of the system.

The above embodiments are only for illustrating the technical concept and features of the present utility model, and are intended to enable those skilled in the art to understand the content of the present utility model and implement the same, and are not intended to limit the scope of the present utility model. All equivalent changes or modifications made in accordance with the essence of the present utility model are intended to be included within the scope of the present utility model.

Claims

1. The molecular pump controller is characterized by comprising a power supply module, a filtering module, a brake resistor module, a direct current sampling module, an intelligent power module and a molecular pump which are sequentially coupled, wherein the output end of the direct current sampling module is also connected with the sampling end of the DSP module, the first control end of the DSP module is coupled with the controlled end of the brake resistor module, and the second control end of the DSP module is coupled with the controlled end of the intelligent power module.

2. The molecular pump controller of claim 1, wherein the U-terminal and W-terminal of the intelligent power module are connected to sampling terminals of the DSP module.

3. The molecular pump controller of claim 1, wherein a first temperature sensor is mounted within the molecular pump, and wherein an output of the first temperature sensor is coupled to a sampling end of the DSP module.

4. The molecular pump controller of claim 1, wherein the power module, the filter module, the brake resistor module, the dc sampling module, and the intelligent power module are packaged in a same housing, a second temperature sensor is installed in the housing, and an output end of the second temperature sensor is connected to a sampling end of the DSP module.

5. The molecular pump controller of claim 1, wherein an identification module is mounted within the molecular pump, and wherein an output of the identification module is coupled to a sampling end of the DSP module.

6. The molecular pump controller of claim 1, wherein the data interaction end of the DSP module is coupled to an RS-485 interface.

7. The molecular pump controller of claim 1, further comprising a reserved external control interface coupled to the data interaction end of the DSP module.

8. The molecular pump controller of claim 1, further comprising a display module coupled to the data interaction end of the DSP module.