High-voltage frequency conversion all-in-one machine protection circuit

Abstract

The utility model discloses a protection circuit for a high-voltage frequency conversion all-in-one machine, and the circuit comprises a distance sensor which is connected with an isolation module 1; the infrared sensor is connected with the isolation module 2; the audible and visual alarm is connected with the isolation module 3; and the environment monitoring module is respectively connected with the isolation module 1, the isolation module 2 and the isolation module 3, and the environment monitoring module is also connected with a main controller of the high-voltage frequency conversion all-in-one machine. According to the high-voltage frequency conversion all-in-one machine, the approaching situation of workers nearby the high-voltage frequency conversion all-in-one machine can be detected in time, starting and stopping of the high-voltage frequency conversion all-in-one machine are controlled according to instructions of the master controller, hurt to the workers is avoided, cost is low, and accuracy is high.

Description

Technical Field

[0001] This utility model belongs to the technical field of high voltage frequency converter integrated machine, and specifically relates to a protection circuit for a high voltage frequency converter integrated machine. Background Technology

[0002] A variable frequency drive (VFD) integrated machine is a device that integrates a motor controller, a frequency converter, and an operation panel. However, with the development of VFD integrated machines, their operating voltage and power are increasing, posing a greater risk to workers when near them. The increasing size of VFD integrated machines also leads to larger blind spots for workers. Furthermore, in VFD integrated machine application sites, there are various job types and high personnel turnover. During debugging, startup, and operation, it is unavoidable that workers may be too close to the equipment, easily causing electrical and mechanical injuries.

[0003] Existing protection solutions generally require workers to wear mobile terminals and communicate with the host machine for protection. However, this solution cannot be well applied to increasingly complex working environments, as the communication between the mobile terminal and the host machine is easily interfered with by the working environment of the high-voltage frequency converter.

[0004] Therefore, how to reduce interference from the working environment of high-voltage frequency converters, improve the protection level of high-voltage frequency converters, and avoid harm to workers are technical problems that need to be solved by those skilled in the art. Utility Model Content

[0005] The purpose of this utility model is to solve the technical problem that the protection scheme of existing high-voltage frequency converters is easily affected by the working environment, leading to a decrease in the protection level. Therefore, this utility model provides a protection circuit for a high-voltage frequency converter, which includes:

[0006] Distance sensor, connected to isolation module 1;

[0007] An infrared sensor is connected to isolation module 2;

[0008] An audible and visual alarm is connected to isolation module 3;

[0009] An environmental monitoring module is connected to isolation module 1, isolation module 2 and isolation module 3 respectively, and the environmental monitoring module is also connected to the main controller of the high-voltage frequency converter.

[0010] Furthermore, the isolation module 1, isolation module 2 and isolation module 3 are all isolation safety barriers, wherein the isolation module 1 and isolation module 2 are of model NPEXA-CM31 and the isolation module 3 is of model NPEXB-C511.

[0011] Furthermore, the environmental monitoring module is specifically a microcontroller.

[0012] Furthermore, the circuit also includes a power supply module, specifically a transformer. The input terminal of the transformer is connected to the power input terminal of the high-voltage frequency converter, and the output terminal of the transformer is connected to the input terminal of the switching power supply.

[0013] Furthermore, the output terminal of the switching power supply is connected to the input terminal of the intrinsically safe power supply. The output terminal of the switching power supply also outputs 24V DC power to power isolation module 1, isolation module 2, isolation module 3 and environmental monitoring module. The output terminal of the intrinsically safe power supply outputs 12V DC power to power infrared sensor, proximity sensor and audible and visual alarm.

[0014] Furthermore, the switching power supply is also connected to a distance sensor, an infrared sensor, and an audible and visual alarm, respectively.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This utility model provides a protection circuit for a high-voltage frequency converter. Compared with existing technologies, this circuit includes: a distance sensor connected to isolation module 1; an infrared sensor connected to isolation module 2; an audible and visual alarm connected to isolation module 3; and an environmental monitoring module connected to isolation modules 1, 2, and 3 respectively. The environmental monitoring module is also connected to the main controller of the high-voltage frequency converter. It can promptly detect the approach of personnel near the high-voltage frequency converter and control the start and stop of the high-voltage frequency converter according to the instructions of the main controller, thereby avoiding harm to personnel. Furthermore, it is low-cost and highly accurate. Attached Figure Description

[0017] To more clearly illustrate the embodiments of this specification, the accompanying drawings used in the embodiments will be briefly introduced below. The drawings described below are only some embodiments recorded in this specification. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 The diagram shown is a structural schematic of the protection circuit for the high-voltage frequency converter provided in the embodiment of this specification. Detailed Implementation

[0019] To enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this specification, and not all embodiments. Based on the embodiments in this specification, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this specification.

[0020] like Figure 1 The diagram shown illustrates the connection structure of the protection circuit for a high-voltage frequency converter provided in this embodiment. While this specification provides the structures shown in the embodiments or accompanying drawings, based on conventional methods or without creative effort, the structures may include more or fewer combined structures. These structures are not limited to those shown in the embodiments or accompanying drawings. In practical applications of devices or terminal products, the structures described can be executed sequentially or in parallel according to the embodiments or module structures.

[0021] The high-voltage frequency converter integrated machine protection circuit provided in the embodiments of this specification is applied in a high-voltage frequency converter integrated machine. The high-voltage frequency converter integrated machine protection circuit includes:

[0022] Distance sensor, connected to isolation module 1;

[0023] An infrared sensor is connected to isolation module 2;

[0024] An audible and visual alarm is connected to isolation module 3;

[0025] An environmental monitoring module is connected to isolation module 1, isolation module 2 and isolation module 3 respectively, and the environmental monitoring module is also connected to the main controller of the high-voltage frequency converter.

[0026] Specifically, the circuit in this application monitors moving objects within a set range using a distance sensor and an infrared sensor. The distance sensor is... Figure 1The proximity sensor, distance sensor, and infrared sensor in the circuit receive data and send it to the main controller of the high-voltage frequency converter via the environmental monitoring module. The main controller of the high-voltage frequency converter makes a judgment based on the two types of data and then issues a command to the circuit of this application. The environmental monitoring module then controls the audible and visual alarm to sound an alarm according to the command. The environmental monitoring module is a single-chip microcomputer or microprocessor with basic judgment functions. When the environmental monitoring module detects that the distance between a moving object and the frequency converter is less than the warning threshold, it directly controls the audible and visual alarm to sound an alarm. The main controller makes a judgment based on the distance data and infrared data and issues a command. This can be set by those skilled in the art according to the actual situation and is not within the scope of the circuit of this application. Alternatively, the environmental monitoring module can transmit the acquired data to the main controller in the high-voltage frequency converter. The main controller processes the data and then issues a command to the environmental monitoring module in the circuit of this application. In addition, the main controller is also connected to the power input terminal of the high-voltage frequency converter through relay KM1. Those skilled in the art can also set the main controller to shut off the power supply to the high-voltage frequency converter at the same time as issuing the alarm command, so that it is in a safe state.

[0027] In this embodiment of the application, the isolation module 1, isolation module 2 and isolation module 3 are all isolation safety barriers, wherein the isolation module 1 and isolation module 2 are of model NPEXA-CM31 and the isolation module 3 is of model NPEXB-C511.

[0028] In this embodiment, the circuit further includes a power supply module, specifically a transformer. The input terminal of the transformer is connected to the power input terminal of the high-voltage frequency converter, and the output terminal of the transformer is connected to the input terminal of the switching power supply. The output terminal of the switching power supply is connected to the input terminal of the intrinsically safe power supply. The output terminal of the switching power supply also outputs 24V DC power to power isolation modules 1, 2, 3, and the environmental monitoring module. The output terminal of the intrinsically safe power supply outputs 12V DC power to power the infrared sensor, proximity sensor, and audible and visual alarm. High-voltage frequency converters are typically used in mines, located in flammable and explosive environments. Standards require that devices in hazardous and safe areas cannot communicate directly. Therefore, this solution uses isolation modules for isolation and intrinsically safe power supplies to power devices in hazardous areas. The switching power supply is also connected to the proximity sensor, infrared sensor, and audible and visual alarm.

[0029] It should be understood that when an element is referred to as “fixed to” or “set on” another element, it may be directly on the other element or may be interposed with an intervening element; when an element is referred to as “connected to” another element, it may be directly connected to the other element or may be interposed with an intervening element. Furthermore, the term “connected” as used herein may include wireless connections; the word “and / or” as used includes any and all combinations of one or more of the associated listed items.

[0030] It should be understood that various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0031] Those skilled in the art will understand that all or part of the steps of the methods in the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, the program includes one or a combination of the steps of the method embodiments.

[0032] Furthermore, the functional units in the various embodiments of this application can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into a module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.

[0033] The storage media mentioned above can be read-only memory, disk, or optical disk, etc.

[0034] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0035] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

[0036] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A protection circuit for a high-voltage frequency converter, characterized in that, The circuit includes: Distance sensor, connected to isolation module 1; An infrared sensor is connected to isolation module 2; An audible and visual alarm is connected to isolation module 3; An environmental monitoring module is connected to isolation module 1, isolation module 2 and isolation module 3 respectively, and the environmental monitoring module is also connected to the main controller of the high-voltage frequency converter.

2. The protection circuit for the high-voltage frequency converter as described in claim 1, characterized in that, The isolation modules 1, 2 and 3 are all isolation safety barriers. The isolation modules 1 and 2 are of model NPEXA-CM31 and the isolation module 3 is of model NPEXB-C511.

3. The protection circuit for the high-voltage frequency converter as described in claim 1, characterized in that, The environmental monitoring module is specifically a microcontroller.

4. The protection circuit for the high-voltage frequency converter as described in claim 1, characterized in that, The circuit also includes a power supply module, which is specifically a transformer. The input terminal of the transformer is connected to the power input terminal of the high-voltage frequency converter, and the output terminal of the transformer is connected to the input terminal of the switching power supply.

5. The high-voltage frequency converter integrated protection circuit as described in claim 4, characterized in that, The output terminal of the switching power supply is connected to the input terminal of the intrinsically safe power supply. The output terminal of the switching power supply also outputs 24V DC power to power isolation module 1, isolation module 2, isolation module 3 and environmental monitoring module. The output terminal of the intrinsically safe power supply outputs 12V DC power to power infrared sensor, proximity sensor and audible and visual alarm.

6. The high-voltage frequency converter integrated protection circuit as described in claim 4, characterized in that, The switching power supply is also connected to a distance sensor, an infrared sensor, and an audible and visual alarm.

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