Description:FIELD OF THE INVENTION
The present invention relates to the field of electrical machine protection and condition monitoring, particularly addressing the need for real-time monitoring and protection against electrical and mechanical faults.
BACKGROUND OF THE INVENTION
In many industries, electrical machines play a vital role. For the machines, suitable protection is required from mechanical vibrations, overload currents, and fault currents. It is required to increase the lifetime of the machines and decrease operating and maintenance costs.
Electrical machines are susceptible to various types of faults and mechanical vibrations, which can lead to significant damage and downtime. Traditional protection methods often rely on offline inspections and periodic maintenance, which may not detect developing faults in a timely manner. The present invention offers a proactive and comprehensive solution for electrical machine protection by combining real-time monitoring, sensor fusion, and remote control capabilities.
SUMMARY OF THE INVENTION
This summary is provided to introduce a selection of concepts, in a simplified format, that are further described in the detailed description of the invention.
This summary is neither intended to identify key or essential inventive concepts of the invention and nor is it intended for determining the scope of the invention.
To further clarify advantages and features of the present invention, a more particular description of the invention will be rendered by reference to specific embodiments thereof, which is illustrated in the appended drawings. It is appreciated that these drawings depict only typical embodiments of the invention and are therefore not to be considered limiting of its scope. The invention will be described and explained with additional specificity and detail with the accompanying drawings.
In practice, most of the electrical machines (generators and motors) will get damage due to overload current, various types of faults, such as inter turn faults, phase-to-ground faults, phase-to-phase faults, and three phase faults, and mechanical vibrations. For the protection of the machines, suitable monitoring and protection will be required.
In electrical machines, the major parts are the stator and rotor. In general, the electrical power supply is given to the stator of the motor, or the power is taken from the stator of the generator. In the proposed system, current sensors will be connected in series with the terminals. Then the sensors can sense the flow of currents, and the same data will be sent to the microcontroller. Similarly, another current sensor will be connected between the rotor and ground. If the machine is operating under unbalanced conditions, such as a turn-to-turn fault or an unbalanced fault, the corresponding current will flow to the ground. The current is sensed by the sensor, and this data is also sent to the microcontroller. One more major problem in electrical machines is mechanical vibrations because of unbalanced loading, misalignment, loose coupling between two machines, etc. Because of the mechanical vibrations, the ball bearings of the machine will get damaged. To avoid damage to the machine, a vibration sensor will be arranged on the machine to measure the vibrations magnitude, frequency, and intensity, and this information will be sent to the controller.
Based on the data that will be sent by the sensors, the stator faults, rotor faults, and mechanical vibrations will be indicated by red, green, and white LED indicators, respectively. At the same time, the buzzer will give the sound to alert the operator, and the same date will also send the notification to the operator's mobile. It is also useful for the remote operation of the system. Under abnormal operating conditions, if the operator does not take the necessary action for the protection of the machines, the switch will be open.
The present invention provides an electrical machine protection system comprising:
1. Current Sensors: Connected in series with the stator terminals and between the rotor and ground to sense stator and rotor currents, respectively.
2. Vibration Sensor: Mounted on the machine to measure mechanical vibrations.
3. Microcontroller: Receives data from the sensors, processes it, and controls the output devices.
4. LED Indicators: Red, green, and white LEDs to indicate stator faults, rotor faults, and mechanical vibrations, respectively.
5. Buzzer: Emits an audible alarm to alert the operator of abnormal conditions.
6. Mobile Communication Module: Enables communication with a mobile device for remote monitoring and control.
7. Switch: Controls the power supply to the electrical machine.
BRIEF DESCRIPTION OF THE DRAWINGS
The illustrated embodiments of the subject matter will be understood by reference to the drawings, wherein like parts are designated by like numerals throughout. The following description is intended only by way of example, and simply illustrates certain selected embodiments of devices, systems, and methods that are consistent with the subject matter as claimed herein, wherein:
FIGURE 1: SCHEMATIC DIAGRAM OF THE PROPOSED SYSTEM
The figures depict embodiments of the present subject matter for the purposes of illustration only. A person skilled in the art will easily recognize from the following description that alternative embodiments of the structures and methods illustrated herein may be employed without departing from the principles of the disclosure described herein.
DETAILED DESCRIPTION OF THE INVENTION
The detailed description of various exemplary embodiments of the disclosure is described herein with reference to the accompanying drawings. It should be noted that the embodiments are described herein in such details as to clearly communicate the disclosure. However, the amount of details provided herein is not intended to limit the anticipated variations of embodiments; on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the scope of the present disclosure as defined by the appended claims.
It is also to be understood that various arrangements may be devised that, although not explicitly described or shown herein, embody the principles of the present disclosure. Moreover, all statements herein reciting principles, aspects, and embodiments of the present disclosure, as well as specific examples, are intended to encompass equivalents thereof.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments. As used herein, the singular forms “a",” “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises,” “comprising,” “includes” and/or “including,” when used herein, specify the presence of stated features, integers, steps, operations, elements and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and/or groups thereof.
It should also be noted that in some alternative implementations, the functions/acts noted may occur out of the order noted in the figures. For example, two figures shown in succession may, in fact, be executed concurrently or may sometimes be executed in the reverse order, depending upon the functionality/acts involved.
In addition, the descriptions of "first", "second", “third”, and the like in the present invention are used for the purpose of description only, and are not to be construed as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" and "second" may include at least one of the features, either explicitly or implicitly.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which example embodiments belong. It will be further understood that terms, e.g., those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
In practice, most of the electrical machines (generators and motors) will get damage due to overload current, various types of faults, such as inter turn faults, phase-to-ground faults, phase-to-phase faults, and three phase faults, and mechanical vibrations. For the protection of the machines, suitable monitoring and protection will be required.
In electrical machines, the major parts are the stator and rotor. In general, the electrical power supply is given to the stator of the motor, or the power is taken from the stator of the generator. In the proposed system, current sensors will be connected in series with the terminals. Then the sensors can sense the flow of currents, and the same data will be sent to the microcontroller. Similarly, another current sensor will be connected between the rotor and ground. If the machine is operating under unbalanced conditions, such as a turn-to-turn fault or an unbalanced fault, the corresponding current will flow to the ground. The current is sensed by the sensor, and this data is also sent to the microcontroller. One more major problem in electrical machines is mechanical vibrations because of unbalanced loading, misalignment, loose coupling between two machines, etc. Because of the mechanical vibrations, the ball bearings of the machine will get damaged. To avoid damage to the machine, a vibration sensor will be arranged on the machine to measure the vibrations magnitude, frequency, and intensity, and this information will be sent to the controller.
Based on the data that will be sent by the sensors, the stator faults, rotor faults, and mechanical vibrations will be indicated by red, green, and white LED indicators, respectively. At the same time, the buzzer will give the sound to alert the operator, and the same date will also send the notification to the operator's mobile. It is also useful for the remote operation of the system. Under abnormal operating conditions, if the operator does not take the necessary action for the protection of the machines, the switch will be open.
• Sensing and Data Acquisition:
• Current sensors measure the currents flowing through the stator windings and between the rotor and ground.
• The vibration sensor captures the magnitude, frequency, and intensity of mechanical vibrations.
• The sensors transmit the collected data to the microcontroller for processing.
• Data Processing and Analysis:
• The microcontroller analyzes the sensor data to identify potential faults and abnormal operating conditions.
• It compares the current and vibration readings with predefined thresholds or patterns indicative of faults.
• Alerts and Notifications:
• If a stator fault is detected, the red LED indicator illuminates, and the buzzer sounds an alarm.
• If a rotor fault is detected, the green LED indicator illuminates, and the buzzer sounds an alarm.
• If mechanical vibrations exceed a safe limit, the white LED indicator illuminates, and the buzzer sounds an alarm.
• Simultaneously, the mobile communication module sends notifications to the operator's mobile device, providing details of the detected fault or abnormal condition.
• Remote Monitoring and Control:
• The mobile device allows the operator to remotely monitor the machine's status and view real-time sensor data.
• The operator can also remotely control the system, such as acknowledging alarms or adjusting system settings.
• Automatic Protection:
• If the operator fails to take necessary action within a predefined time after receiving an alarm, the system automatically opens the switch to disconnect the machine from the power supply, preventing further damage.
ADVANTAGES OF THE INVENTION
• It will increase the lifetime of the machines.
• Reduce the operating cost.
• It will provide protection from mechanical and electrical abnormal operating conditions.
, Claims:1. An electrical machine protection system comprising: Current sensors for sensing stator and rotor currents; A vibration sensor for measuring mechanical vibrations; A microcontroller for data processing and control; LED indicators for visual alerts; A buzzer for audible alerts; A mobile communication module for remote monitoring and control; A switch for controlling the power supply to the electrical machine.
2. The system as claimed in claim 1, wherein the microcontroller analyzes sensor data to identify stator faults, rotor faults, and excessive mechanical vibrations.
3. The system as claimed in claim 1, wherein the system triggers visual and audible alerts through LED indicators and a buzzer upon detection of faults or abnormal conditions.
4. The system as claimed in claim 1, wherein the system sends notifications to a mobile device for remote monitoring and control.
5. The system as claimed in claim 1, wherein the system automatically disconnects the machine from the power supply under abnormal conditions if the operator fails to take necessary action.