Motor partial discharge detection device

Abstract

The utility model discloses a motor partial discharge detection device, which comprises a high-frequency sensor, a detection end of which is electrically connected with a to-be-detected part of a to-be-detected motor and is used for carrying out discharge detection on the to-be-detected part to obtain a discharge signal of the to-be-detected part; the input end of the signal processing module is electrically connected with the output end of the high-frequency sensor, and the signal processing module is used for receiving the discharge signal output by the high-frequency sensor and processing the discharge signal to obtain a digital signal; the input end of the FPGA module is electrically connected with the output end of the signal processing module, and the FPGA module is used for receiving the digital signals output by the signal processing module and processing the digital signals to obtain electric power parameters of the part to be detected so as to obtain a discharge detection result. According to the invention, accurate detection of motor discharge can be realized, and the real-time performance of detection is ensured.

Description

Technical Field

[0001] This utility model relates to the field of power electronics technology, and in particular to a partial discharge detection device for motors. Background Technology

[0002] High-voltage motors are widely used in industrial fields, and monitoring and maintaining their operating status is crucial for ensuring production safety and extending equipment lifespan. Partial discharge is a significant indicator of insulation system degradation in high-voltage motors; therefore, effective detection and monitoring of partial discharge are of paramount importance.

[0003] However, existing discharge detection devices suffer from problems such as poor real-time detection, making it impossible to detect partial discharges in a timely and accurate manner. Utility Model Content

[0004] In view of this, the present invention provides a partial discharge detection device for motors, the main purpose of which is to solve the problem that current discharge detection devices cannot perform partial discharge detection in a timely and accurate manner.

[0005] To address the above problems, this application provides a partial discharge detection device for an electric motor, comprising:

[0006] A high-frequency sensor, with its detection end electrically connected to the part of the motor under test, is used to detect the discharge of the part under test and obtain the discharge signal of the part under test.

[0007] The signal processing module has its input terminal electrically connected to the output terminal of the high-frequency sensor. It is used to receive the discharge signal output by the high-frequency sensor and process the discharge signal to obtain a digital signal.

[0008] The Field Programmable Gate Array (FPGA) module has its input terminal electrically connected to the output terminal of the signal processing module. It is used to receive the digital signal output by the signal processing module, process the digital signal, obtain the power parameters of the part under test, and obtain the discharge detection result.

[0009] Optionally, the signal processing module includes: an analog signal conditioning circuit and an analog-to-digital conversion module;

[0010] The analog signal conditioning circuit has its input terminal electrically connected to the output terminal of the high-frequency sensor. It is used to receive the discharge signal output by the high-frequency sensor and process the discharge signal to obtain a conditioned discharge signal.

[0011] The analog-to-digital converter module has its input terminal electrically connected to the output terminal of the analog signal conditioning circuit, and is used to receive the conditioned discharge signal output by the analog signal conditioning circuit and convert the conditioned discharge signal into a digital signal; the output terminal of the analog-to-digital converter module is electrically connected to the input terminal of the FPGA module as the output terminal of the signal processing module, and is used to output a digital signal to the FPGA module.

[0012] Optionally, the analog signal conditioning circuit includes a bandpass filter, a low-noise amplifier, and an anti-aliasing filter that are electrically connected in sequence.

[0013] Optionally, the motor partial discharge detection device further includes a self-test module;

[0014] The self-test module has its output terminal electrically connected to the input terminal of the high-frequency sensor. It is used to simulate the discharge signal when the part under test is partially discharged, and outputs the simulated discharge signal to the high-frequency sensor.

[0015] Optionally, the motor partial discharge detection device further includes an interactive module for displaying power parameters.

[0016] Optionally, the analog-to-digital converter module is electrically connected to the input terminal of the FPGA module via a JESD204B protocol interface.

[0017] Optionally, the motor partial discharge detection device may also include a power supply module.

[0018] The partial discharge detection device for motors in this application utilizes a high-frequency sensor to detect the part under test in real time, thereby obtaining the discharge signal promptly. The discharge signal is then processed by a signal processing module and an FPGA module to obtain electrical parameters accurately and timely, achieving precise detection of motor discharge and ensuring real-time performance. Furthermore, the partial discharge detection device is compact, facilitating on-site operation and enhancing the flexibility and convenience of the detection process.

[0019] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more obvious and understandable, specific embodiments of this utility model are given below. Attached Figure Description

[0020] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0021] Figure 1 This is a structural block diagram of a motor partial discharge detection device according to an embodiment of this application;

[0022] Figure 2 This is a functional block diagram of the FPGA module in another embodiment of this application. Detailed Implementation

[0023] Various embodiments and features of this application are described herein with reference to the accompanying drawings.

[0024] It should be understood that various modifications can be made to the embodiments described herein. Therefore, the above description should not be considered as limiting, but merely as an example of embodiments. Other modifications within the scope and spirit of this application will be apparent to those skilled in the art.

[0025] The accompanying drawings, which are included in and form part of this specification, illustrate embodiments of the present application and, together with the general description of the present application given above and the detailed description of the embodiments given below, serve to explain the principles of the present application.

[0026] These and other features of this application will become apparent from the following description of preferred forms of embodiments given as non-limiting examples, with reference to the accompanying drawings.

[0027] It should also be understood that although this application has been described with reference to some specific examples, those skilled in the art can certainly implement many other equivalent forms of this application.

[0028] The above and other aspects, features and advantages of this application will become more apparent when taken in conjunction with the accompanying drawings and in view of the following detailed description.

[0029] Specific embodiments of this application are described thereafter with reference to the accompanying drawings; however, it should be understood that the claimed embodiments are merely examples of this application, which can be implemented in various ways. Well-known and / or repeated functions and structures are not described in detail to avoid unnecessary or redundant details that could obscure the application. Therefore, the specific structural and functional details claimed herein are not intended to be limiting, but merely serve as the basis and representative basis for the claims to teach those skilled in the art to use this application in a variety of substantially any suitable detailed structures.

[0030] This specification may use the phrases “in one embodiment,” “in another embodiment,” “in yet another embodiment,” or “in other embodiments,” all of which may refer to one or more of the same or different embodiments according to this application.

[0031] This application provides a partial discharge detection device for an electric motor, such as... Figure 1 As shown, the system includes: a high-frequency sensor, a signal processing module, and a field-programmable gate array (FPGA) module. The detection end of the high-frequency sensor is electrically connected to the part of the motor under test (TMB) for detecting discharge at the TMB and obtaining a discharge signal. The input end of the signal processing module is electrically connected to the output end of the high-frequency sensor for receiving the discharge signal and processing it to obtain a digital signal. The input end of the FPGA module is electrically connected to the output end of the signal processing module for receiving the digital signal and processing it to obtain the electrical parameters of the TMB, thus obtaining the discharge detection result.

[0032] In this embodiment, the signal processing module includes an analog signal conditioning circuit and an analog-to-digital converter (ADC) module. The input terminal of the analog signal conditioning circuit is electrically connected to the output terminal of the high-frequency sensor, and is used to receive the discharge signal output by the high-frequency sensor and process the discharge signal to obtain a conditioned discharge signal.

[0033] The input terminal of the analog-to-digital converter (ADC) module is electrically connected to the output terminal of the analog signal conditioning circuit, and is used to receive the conditioned discharge signal output by the analog signal conditioning circuit and convert the conditioned discharge signal into a digital signal; the output terminal of the analog-to-digital converter module is electrically connected to the input terminal of the FPGA module as the output terminal of the signal processing module, and is used to output a digital signal to the FPGA module.

[0034] The motor partial discharge detection device in this embodiment can detect the test area of ​​the test point in real time using a high-frequency sensor, thereby obtaining the discharge signal in a timely manner. Then, the discharge signal can be processed by the signal processing module and FPGA module to obtain the power parameters in a timely and accurate manner, realizing precise detection of motor discharge and ensuring real-time detection. At the same time, the motor partial discharge detection device in this application is small in size, easy to operate on site, and improves the flexibility and convenience of detection.

[0035] In this embodiment, the motor partial discharge detection device also includes a self-test module, an interaction module, and a power supply module.

[0036] The output terminal of the self-test module is electrically connected to the input terminal of the high-frequency sensor, and is used to simulate the discharge signal when the part under test is partially discharged, and output the simulated discharge signal to the high-frequency sensor.

[0037] The interactive module is used to display power parameters. Specifically, the interactive module is equipped with an LCD touch screen, which can display power parameters and processing results, and use the touch function to control the motor partial discharge detection device.

[0038] The power module is used to power the high-frequency sensor, analog signal conditioning circuit, ADC module, and FPGA module.

[0039] In this embodiment, the high-frequency sensor can be a high-frequency sensor with a frequency response range of 100kHz to 1GHz, which is installed at the stator winding of the motor to collect / detect the discharge signal of the motor and output the collected discharge signal to the analog signal conditioning circuit.

[0040] In this embodiment, the analog signal conditioning circuit includes a bandpass filter, a low-noise amplifier, and an anti-aliasing filter connected in sequence. The bandpass filter has a wide frequency range, the amplifier gain is adjustable, and the processed signal is output to the ADC module.

[0041] In this embodiment, the analog-to-digital converter (ADC) module is electrically connected to the input of the FPGA module via a JESD204B protocol interface. Specifically, the ADC module can be a 14-bit resolution, 500MSPS sampling rate analog-to-digital converter. The sampled data undergoes analog-to-digital conversion, followed by parallel-to-serial conversion via the JESD204B protocol, before being output to the FPGA module through the interface. In this embodiment, the use of the JESD204B protocol improves data transmission rate and efficiency, ensuring signal transmission reliability. Using the JESD204B serial interface reduces wiring, simplifies system design and implementation complexity, and a self-test module performs functional checks to ensure normal device operation.

[0042] Another embodiment of this application provides a partial discharge detection device for an electric motor. In this embodiment, the FPGA module can be structured as follows: Figure 2As shown, the system includes a JESD204B interface, an FFT module, a data analysis module, a control module, and an LCD driver. Specifically, the FPGA module can be an FPGA with a GT high-speed interface. It converts the data string received from the JESD204B interface and outputs it to the embedded FFT algorithm module. The FFT algorithm is used to process the data to obtain electrical parameters such as amplitude, phase, and frequency of partial discharge. The data analysis algorithm in the data analysis module analyzes these electrical parameters. Simultaneously, the obtained characteristic parameters / electrical parameters such as amplitude, phase, and frequency are output to the interaction module via the LCD driver for display. Furthermore, the interaction module can interact with the control module in the FPGA module, and the control module can control the self-test module to enable the self-test function, thereby detecting whether the device is working properly. In this embodiment, by using the FPGA module, real-time acquisition and processing of partial discharge signals can be achieved, enabling timely fault warnings. In this embodiment, the FFT algorithm in the FFT (Fast Fourier Transform) module is an existing method for processing digital signals. The data analysis algorithms in the data analysis module also use existing data analysis algorithms.

[0043] The motor partial discharge detection device in this embodiment uses an FPGA to achieve real-time acquisition and processing of partial discharge signals from a high-voltage motor. It employs the JESD204B protocol for efficient data transmission. The device has a compact structure, facilitating on-site operation and use. The inclusion of a self-test module enhances the system's reliability and maintainability.

[0044] The operation of the motor partial discharge detection device in this embodiment is as follows: A high-frequency sensor is installed at a key part of the high-voltage motor to detect partial discharge signals in real time. After processing by the analog signal conditioning circuit, the signal enters the ADC module for analog-to-digital conversion. The ADC module transmits the digital signal to the FPGA module through the JESD204B protocol interface. The FPGA module receives and stores the digital signal, and uses embedded FFT and other algorithms to process the signal in real time, extracting characteristic parameters such as the amplitude, phase, and frequency of the partial discharge. The processing results are displayed on the LCD touch screen, realizing the monitoring of the high-voltage motor's operating status and fault early warning.

[0045] The above embodiments are merely exemplary embodiments of this application and are not intended to limit this application. The scope of protection of this application is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this application within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this application.

Claims

1. A partial discharge detection device for an electric motor, characterized in that, include: A high-frequency sensor, with its detection end electrically connected to the part of the motor under test, is used to detect the discharge of the part under test and obtain the discharge signal of the part under test. The signal processing module has its input terminal electrically connected to the output terminal of the high-frequency sensor. It is used to receive the discharge signal output by the high-frequency sensor and process the discharge signal to obtain a digital signal. The Field Programmable Gate Array (FPGA) module has its input terminal electrically connected to the output terminal of the signal processing module. It is used to receive the digital signal output by the signal processing module, process the digital signal, obtain the power parameters of the part under test, and obtain the discharge detection result. The signal processing module includes: an analog signal conditioning circuit and an analog-to-digital conversion module; The analog signal conditioning circuit includes a bandpass filter, a low-noise amplifier, and an anti-aliasing filter that are electrically connected in sequence. The analog-to-digital converter module is electrically connected to the input terminal of the FPGA module via a JESD204B protocol interface.

2. The motor partial discharge detection device as described in claim 1, characterized in that, The analog signal conditioning circuit has its input terminal electrically connected to the output terminal of the high-frequency sensor. It is used to receive the discharge signal output by the high-frequency sensor and process the discharge signal to obtain a conditioned discharge signal. The analog-to-digital converter module has its input terminal electrically connected to the output terminal of the analog signal conditioning circuit, and is used to receive the conditioned discharge signal output by the analog signal conditioning circuit and convert the conditioned discharge signal into a digital signal; the output terminal of the analog-to-digital converter module is electrically connected to the input terminal of the FPGA module as the output terminal of the signal processing module, and is used to output a digital signal to the FPGA module.

3. The motor partial discharge detection device as described in claim 1, characterized in that, The motor partial discharge detection device also includes a self-test module; The self-test module has its output terminal electrically connected to the input terminal of the high-frequency sensor. It is used to simulate the discharge signal when the part under test is partially discharged, and outputs the simulated discharge signal to the high-frequency sensor.

4. The motor partial discharge detection device as described in claim 1, characterized in that, The motor partial discharge detection device also includes an interactive module, which is used to display power parameters.

5. The motor partial discharge detection device as described in claim 1, characterized in that, The motor partial discharge detection device also includes a power supply module.

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