DESC:TECHNICAL FIELD
The present disclosure generally relates to the field of regulating and controlling the system of a fan. In particular, the present disclosure relates to a smart regulator detection system for a brushless direct current motor (BLDC) fan and a method thereof.

BACKGROUND
[0001] The background information herein below relates to the present disclosure but is not necessarily prior art.
[0002] In typical induction fans, a fan operates on an alternating current (AC) voltage. Depending on input AC voltage (typically 230VAC in India), the fan will run on a particular speed. The fan speed is proportional to the input AC voltage. So, the change in input AC voltage will result in change in the fan speed.
[0003] For changing the input voltage in the typical induction fans, a fan regulator is provided in between an electric switch and the fan. There are generally two types of fan regulators:
i. Step type regulator (capacitive regulator): The step type regulator generally includes a set of five capacitors connected in series in a power line to reduce the input AC voltage. In other words, the series capacitors create a drop in the input AC voltage in the power line, so that the input AC voltage supplied to the induction fan will be regulated step wise with the selective inline connection of one or more five capacitors to obtain five fan speed levels.
ii. Stepless type regulator (dimmer / Triac regulator): The stepless type regulator works on Triac based hardware and decrease the on-off time of an AC pulse rather than reducing the amplitude of the pulse. Because of such decrease in the on-off time, the root mean square (RMS) voltage provided to the fan will decrease when the regulator is operated.
[0004] However, in a brushless direct current motor (BLDC) fans, the fans operate on direct current (DC) voltage and not on the AC voltage. That is, the BLDC motor will not work directly with the input AC voltage of 230 V. Hence, the BLDC fans require electronics circuit to convert the AC voltage into the DC voltage. Such electronic circuits include switched mode power supply (SMPS) and dedicated motor driver circuit. The SMPS converts 230V AC voltage into 24V DC voltage. Also, the SMPS operates in the range of 140V AC voltage to 285V AC voltage. Within this input AC voltage range, the SMPS generates 24V DC voltage.
[0005] To change the Speed of the BLDC motor, an operating frequency of a motor driver integrated circuit is required to be electrically changed to a required motor speed. This is controlled by a microcontroller based on user input signals. The user input signals are received from various devices including, but not limited to, remote control, mobile application, voice command, a cloud control, an Internet of Things (IoT) device, and so forth.
[0006] For operating the BLDC fans, both AC voltage and DC voltage are required to be maintained constant. Any change in DC voltage will affect the performance of driving circuit, driving algorithms, microcontroller, and so forth. Hence, it is important to keep the DC voltage stable and the AC voltage within the operating range of the SMPS.
[0007] However, the issue arises when a conventional induction fan is replaced with a BLDC fan. Because of such replacement, the BLDC fan is connected to an electric switch through the existing fan regulator, which was used for the conventional induction fan. When the input AC supply voltage is dropped below the operating range of SMPS of BLDC fan by the operation of the fan regular, the DC voltage generated by the SMPS is affected and which in turns affects the performance of the BLDC fan. Such affects may result in fan speed fluctuations, fan turning on-off randomly, etc. Hence, it is very important to bypass the fan regulators while using the BLDC fans.
[0008] However, since the fan regulators are conventionally used in all houses, it is difficult to educate all customers about BLDC technology and most of the times these fan regulators are kept in fan connection. This results in issues with fan performance, thereby resulting in bad user experience.
[0009] Therefore, there is a need to develop a smart regulator detection system for a fan and a method thereof that can alleviate the aforementioned drawbacks.

OBJECTS
[0010] Some of the objects of the present disclosure, which at least one embodiment herein satisfies, are as follows.
[0011] It is an object of the present disclosure to ameliorate one or more problems of the prior art or to at least provide a useful alternative.
[0012] The main object of the present disclosure is to provide a smart regulator detection system for a fan and method thereof.
[0013] Another object of the present disclosure is to provide a smart regulator detection system for a fan to sense and detect an input provided by a user and give feedback to the user.
[0014] Another object of the present disclosure is to provide a smart regulator detection system for a fan that protects the fan from power disturbances.
[0015] Still another object of the present disclosure is to provide a mechanism for a fan that protects other electronic components by notifying the user to take corrective action.
[0016] Yet another object of the present disclosure is to provide a mechanism for a fan that detects and converts the change in AC or DC voltage during voltage drop.
[0017] Other objects and advantages of the present disclosure will be more apparent from the following description when read in conjunction with the accompanying figures, which are not intended to limit the scope of the present disclosure.

SUMMARY
[0018] This summary is provided to introduce concepts related to a smart regulator detection system and method for controlling the operation of brushless direct current motor (BLDC) fans. The concepts are further described below in the detailed description. This summary is not intended to identify essential features of the claimed subject matter nor is it intended for use in determining or limiting the scope of the claimed subject matter.
[0019] The present disclosure envisages a smart regulator detection system, a method for controlling the operation of a brushless direct current motor (BLDC) fan, and a method of user notification regarding the operation of the BLDC fan.
[0020] The smart regulator detection system comprises an electric switch to supply an input alternate current (AC) voltage; a fan regulator electrically connected to the electric switch and configured to drop the input AC voltage when operated by a user; and a BLDC fan electrically connected to the electric switch through the fan regular.
[0021] The BLDC fan includes a detection unit and a controller unit. The detection unit is configured to receive the input AC voltage, compare the input AC voltage with an AC operating voltage range of the BLDC fan, and generate an impulse signal based on the comparison. The controller unit is configured to receive the generated impulse signal from the detection unit for controlling the operation of the BLDC fan.
[0022] In an aspect, the detection unit is configured to generate a high impulse signal when the input AC voltage is detected less than the AC operating voltage range. The detection unit is further configured to generate a low impulse signal when the input AC voltage is detected to increase above the AC operating voltage range.
[0023] In an aspect, the controller unit is configured to receive the high impulse signal from the detection unit, and turn off the fan for a predefined time period based on high impulse signal.
[0024] In an aspect, the controller unit is configured to receive the low impulse signal from the detection unit, perform pulse count of the low impulse signal, and turn on the BLDC fan when the pulse count is less than a pre-set threshold value.
[0025] In an aspect, the pre-set threshold value is 3.
[0026] In an alternative aspect, the controller unit is configured to notify a user of the fan when the pulse count is greater than the pre-set threshold value. In said aspect, the controller unit is configured to notify the user by a constant blinking of a light emitting diode (LED) on the BLDC fan.
[0027] In an aspect, the detection unit is configured to generate the high impulse signal when a voltage drop occurs from the electric switch.
[0028] In an aspect, the detection unit is configured to generate the low impulse signal when a voltage drop occurs due to the operation of the fan regulator.
[0029] The present disclosure further envisages a method for controlling the operation of a fan. The method comprises the following steps of:
• receiving, by a detection unit of a microcontroller, an input alternate current (AC);
• comparing, by the detection unit, the input alternate current (AC) with an AC operating voltage of a BLDC fan;
• generating, by the detection unit, an impulse signal based on the comparison; and
• receiving, by a controller unit of the microcontroller, the generated impulse signal from the detection unit for controlling the operation of the BLDC fan.
[0030] The present disclosure further envisages a method for user notification. The method comprises the following steps of:
• detecting, by a detection unit of a microcontroller, the input alternate current (AC) voltage below an AC operating voltage of a BLDC fan;
• receiving, by a controller unit, an impulse signal generated by the detection unit; and
• constantly blinking, by the controller unit, a light emitting diode (LED) on the BLDC fan for notifying a user of the BLDC fan.
[0031] In an aspect, the notification is selected from a group of an audio-visual and haptic illumination on the fan and/or remote controller and/or mobile device application and/or any other connected IoT device.

BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWING
[0032] A smart regulator detection system and method for controlling the operation of a brushless direct current motor (BLDC) fan of the present disclosure will now be described with the help of the accompanying drawing, in which:
[0033] Figure 1 illustrates a line diagram of a smart regulator detection system, in accordance with an embodiment of the present disclosure;
[0034] Figure 2 illustrates a block diagram of a brushless direct current motor (BLDC) fan, in accordance with an embodiment of the present disclosure;
[0035] Figures 3A-3B illustrate a logic diagram of the smart regulator detection system for controlling the operation of a fan, in accordance with an embodiment of the present disclosure;
[0036] Figure 4 illustrates a method for controlling the operation of a fan, in accordance with an embodiment of the present disclosure; and
[0037] Figure 5 illustrates a method for user notification, in accordance with an embodiment of the present disclosure.

LIST OF REFERENCE NUMERALS:
100 Smart regulator detection system
102 Electric Switch
104 Fan regulator
106 BLDC Fan
108 Microcontroller
110 Detection Unit
112 LEDs

DETAILED DESCRIPTION
[0038] Embodiments, of the present disclosure, will now be described with reference to the accompanying drawing.
[0039] Embodiments are provided so as to thoroughly and fully convey the scope of the present disclosure to the person skilled in the art. Numerous details are set forth, relating to specific components and methods to provide a complete understanding of embodiments of the present disclosure. It will be apparent to the person skilled in the art that the details provided in the embodiments should not be construed to limit the scope of the present disclosure. In some embodiments, well-known apparatus structures, and well-known techniques are not described in detail.
[0040] The terminology used, in the present disclosure, is only for the purpose of explaining a particular embodiment and such terminology shall not be considered to limit the scope of the present disclosure. As used in the present disclosure, the forms “a”, “an”, and “the” may be intended to include the plural forms as well, unless the context clearly suggests otherwise. The terms, “comprises”, “comprising”, “including” and “having” are open-ended transitional phrases and therefore, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not forbid the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
[0041] When an element is referred to as being “embodied thereon”, “engaged to”, "connected to", “coupled to” or “communicatively coupled to” another element, it may be directly on, engaged, connected or coupled to the other element. As used herein, the term “and/or” includes any and all combinations of one or more of the associated listed elements.
[0042] The terms first, second, third, etc., should not be construed to limit the scope of the present disclosure as the aforementioned terms may be only used to distinguish one element or component from another element or component. When used herein, terms such as first, second, third, etc., do not imply a specific sequence or order unless clearly suggested by the present disclosure.
[0043] Terms such as “inner,” “outer,” "beneath," "below," "lower," "above," "upper," and the like may be used in the present disclosure to describe relationships between different elements as depicted from the figures.
[0044] In typical induction fans, a fan operates on an alternating current (AC) voltage. Depending on input AC voltage (typically 230VAC in India), the fan will run on a particular speed. The fan speed is proportional to the input AC voltage. So, the change in input AC voltage will result in change in the fan speed.
[0045] For changing the input voltage in the typical induction fans, a fan regulator is provided in between an electric switch and the fan. There are generally two types of fan regulators:
iii. Step type regulator (capacitive regulator): The step type regulator generally includes a set of five capacitors connected in series in a power line to reduce the input AC voltage. In other words, the series capacitors create a drop in the input AC voltage in the power line, so that the input AC voltage supplied to the induction fan will be regulated step wise with the selective inline connection of one or more five capacitors to obtain five fan speed levels.
iv. Stepless type regulator (dimmer / Triac regulator): The stepless type regulator works on Triac based hardware and decrease the on-off time of an AC pulse rather than reducing the amplitude of the pulse. Because of such decrease in the on-off time, the root mean square (RMS) voltage provided to the fan will decrease when the regulator is operated.
[0046] However, in a brushless direct current motor (BLDC) fans, the fans operate on direct current (DC) voltage and not on the AC voltage. That is, the BLDC motor will not work directly with the input AC voltage of 230 V. Hence, the BLDC fans require electronics circuit to convert the AC voltage into the DC voltage. Such electronic circuits include switched mode power supply (SMPS) and dedicated motor driver circuit. The SMPS converts 230V AC voltage into 24V DC voltage. Also, the SMPS operates in the range of 140V AC voltage to 285V AC voltage. Within this input AC voltage range, the SMPS generates 24V DC voltage.
[0047] To change the Speed of the BLDC motor, an operating frequency of a motor driver integrated circuit is required to be electrically changed to a required motor speed. This is controlled by a microcontroller based on user input signals. The user input signals are received from various devices including, but not limited to, remote control, mobile application, voice command, a cloud control, an Internet of Things (IoT) device, and so forth.
[0048] For operating the BLDC fans, both AC voltage and DC voltage are required to be maintained constant. Any change in DC voltage (24V) will affect the performance of driving circuit, driving algorithms, microcontroller, and so forth. Hence, it is important to keep the DC voltage stable and the AC voltage within the operating range of the SMPS.
[0049] However, the issue arises when a conventional induction fan is replaced with a BLDC fan. Because of such replacement, the BLDC fan is connected to an electric switch through the existing fan regulator, which was used for the conventional induction fan. When the input AC supply voltage is dropped below the operating range of SMPS of BLDC fan by the operation of the fan regular, the DC voltage generated by the SMPS is affected and which in turns affects the performance of the BLDC fan. Such affects may result in fan speed fluctuations, fan turning on-off randomly, etc. Hence, it is very important to bypass the fan regulators while using the BLDC fans.
[0050] However, since the fan regulators are conventionally used in all houses, it is difficult to educate all customers about BLDC technology and most of the times these fan regulators are kept in fan connection. This results in issues with fan performance, thereby resulting in bad user experience.
[0051] To this, the present disclosure envisages a smart regulator detection system for brushless direct current motor (BLDC) fans, a method for controlling the operation of the BLDC fans, and a method for notification to a user of the BLDC fans. The smart regulator detection system 100 is described herein with reference to Figures 1 to 2, and a method for controlling the operation of a fan is described with reference to Figures 3 to 5.
[0052] Figure 1 illustrates a line diagram of a smart regulator detection system (100) for controlling the operation of brushless direct current motor (BLDC) fans, in accordance with an embodiment of the present disclosure. As can be seen from Figure 1, the smart regulator detection system (100) comprises an electric switch (102) to supply an input alternate current (AC) voltage; a fan regulator (104) electrically connected to the electric switch and configured to drop the input AC voltage when operated by a user; and a BLDC fan (106) electrically connected to the electric switch (102) through the fan regular (104).
[0053] The BLDC fan (106) includes a detection unit (110) which is configured to receive the input AC voltage, compare the input AC voltage with an AC operating voltage range of the BLDC fan (106), and generate an impulse signal based on the comparison.
[0054] Further, as can be seen from Figure 2, the BLDC fan (106) includes a microcontroller (108). In an aspect, the microcontroller (108) is implemented as one or more microprocessors, microcomputers, microcontrollers, digital signal processors, central processing units, logic circuitries, and/or any devices that manipulate data based on operational instructions. Among other capabilities, the microcontroller (108) is configured to fetch and execute computer-readable instructions stored in a memory. The memory may store one or more computer-readable instructions or routines, which may be fetched and executed to operation of the microcontroller (108). The memory may include any non-transitory storage device including, for example, volatile memory such as RAM, or non-volatile memory such as EPROM, flash memory, and the like.
[0055] Further, the microcontroller (108) is configured to receive the generated impulse signal from the detection unit (110) for controlling the operation of the BLDC fan (106).
[0056] In an aspect, the detection unit (110) is configured to generate a high impulse signal when the input AC voltage is detected less than the AC operating voltage range, and further configured to generate a low impulse signal when the input AC voltage is detected to increase above the AC operating voltage range.
[0057] Further, the microcontroller (108) is configured to receive the high impulse signal from the detection unit (110), and further configured to turn off the BLDC fan (102) for a predefined time period based on high impulse signal.
[0058] Yet further, the microcontroller (108) is configured to receive the low impulse signal from the detection unit (110), further configured to perform pulse count of the low impulse signal, and further configured to turn on the BLDC fan (106) when the pulse count is less than a pre-set threshold value.
[0059] Yet further, the microcontroller (108) is configured to notify the user of the BLDC fan (106) when the pulse count is more than the pre-set threshold value. In such cases, the microcontroller (108) is configured to notify the user by a constant blinking of a light emitting diode (LED) (112) on the BLDC fan (106).
[0060] In an aspect, the pre-set threshold value is 3.
[0061] Also, the detection unit (110) is configured to generate the high impulse signal when a voltage drop occurs from the electric switch (102).
[0062] Further, the detection unit (110) is configured to generate the low impulse signal when a voltage drop occurs due to the operation of the fan regulator (104).
[0063] Figures 3A-3B illustrate a logic diagram of the smart regulator detection system 100 for controlling the operation of the BLDC fans, in accordance with an embodiment of the present disclosure.
[0064] In an operation, in a scenario, where a BLDC fan (106) is running (step 301) and a fan regulator (104) is connected in series in between the BLDC fan (106) and the electric switch (102), then there is no impact on the input AC voltage or on the fan performance when the input AC voltage received by SMPS of the BLDC fan (106) is within the operating AC voltage range of 140V AC voltage to 285V AC voltage.
[0065] Now, in case the input AC voltage is detected less than the operating voltage range (at step 304), the input AC voltage may drop either because of the fan regulator (104) or there is unstable power supply from the power line connected to the electric switch (102).
[0066] In case the input AC voltage is detected less than the operating voltage range (at step 306) by the detection unit (110), the detection unit (110) generates a high impulse signal when the input AC voltage is detected less than the AC operating voltage range, and further configured to generate a low impulse signal when the input AC voltage is detected within the AC operating voltage range (step 308).
[0067] In case the detection unit (110) generates the high impulse signal, the microcontroller (108) is configured to receive the high impulse signal from the detection unit (110), and further configured to turn off the BLDC fan (102) for a predefined time period based on high impulse signal (in step 310).
[0068] Now, in case the input AC voltage is dropped due to the fan regulator (104) (step 312), the input AC voltage will rise as soon as the BLDC fan (106) is tuned off by the microcontroller (108) (step 314). Thereafter, the microcontroller (108) is configured to receive the low impulse signal from the detection unit (110) (step 316), and further configured to perform pulse count of the low impulse signal (in step 318).
[0069] Thereafter, (in steps 320 and 322) the microcontroller (108) is configured to turn on the BLDC fan (106) when the pulse count is less than 3.
[0070] Alternatively, (in steps 320 and 324) the microcontroller (108) is configured to notify the user of the BLDC fan (106) when the pulse count is more than a pre-set threshold value. Further, the microcontroller (108) is configured to notify the user by a constant blinking of a light emitting diode (LED) (112) on the BLDC fan (106). In an aspect, the pre-set threshold value is 3.
[0071] With these indications, the user will get notification that issue is not with the BLDC fan (106) but with their uses of the fan regulator (104) with the BLDC fan (106) or unstable power supply, so that the user can get it corrected with local electrician.
[0072] The present disclosure further describes a method 400 for controlling the operation of a fan and is described with reference to Figure 3. The order in which the method 400 is described is not intended to be construed as a limitation, and any number of the described method steps can be combined in any appropriate order to carry out the method 400 or an alternative method. Additionally, individual steps may be deleted from the method 400 without departing from the scope of the subject matter described herein. The method for controlling the operation of a fan is executed by the smart regulator detection system 100. The method 400 includes the following steps:
[0073] In method step 402, the method 400 comprises receiving, by a detection unit (110), an input alternate current (AC);
[0074] In method step 404, the method 400 comprises comparing, by the detection unit (110), the input alternate current (AC) with an AC operating voltage of a BLDC fan (106);
[0075] In method step 406, the method 400 comprises generating, by the detection unit (110), an impulse signal based on the comparison; and
[0076] In method step 408, the method 400 comprises receiving, by a microcontroller (108), the generated impulse signal from the detection unit (106) for controlling the operation of the BLDC fan (106).
[0077] The present disclosure further describes a method 500 for user notification and is described with reference to Figure 5. The order in which the method 400 is described is not intended to be construed as a limitation, and any number of the described method steps can be combined in any appropriate order to carry out the method 500 or an alternative method. Additionally, individual steps may be deleted from the method 500 without departing from the scope of the subject matter described herein. The method for user notification is executed by the smart regulator detection system 100. The method 500 includes the following steps:
[0078] In method step 502, the method 500 comprises detecting, by a detection unit, (110) the input alternate current (AC) voltage below an AC operating voltage of a BLDC fan (106);
[0079] In method step 504, the method 500 comprises receiving, by a microcontroller (108), an impulse signal generated by the detection unit (110); and
[0080] In method step 506, the method 500 comprises constantly blinking, by the microcontroller (108), a light emitting diode (LED) (112) on the BLDC fan (106) for notifying a user of the BLDC fan (106).
[0081] In an aspect, the notification is selected from a group of an audio-visual and haptic illumination on the fan and/or remote controller and/or mobile device application and/or any other connected IoT device.
[0082] The foregoing description of the embodiments has been provided for purposes of illustration and is not intended to limit the scope of the present disclosure. Individual components of a particular embodiment are generally not limited to that particular embodiment but, are interchangeable. Such variations are not to be regarded as a departure from the present disclosure, and all such modifications are considered to be within the scope of the present disclosure.

TECHNICAL ADVANCEMENTS AND ECONOMIC SIGNIFICANCE
[0083] The present disclosure described herein above has several technical advantages including, but not limited to, an apparatus and a smart regulator detection system and method for controlling the operation of a fan, which:
• provide the user(s) with a smart regulator detection system for a fan to sense and detect the input provided by a user and gives feedback to the user;
• provide the user(s) with a smart regulator detection system for a fan that protects fan from power disturbances; and
• provide the user(s) with provide a mechanism for a fan that protects other electronic components by notifying the user to take corrective action.
[0084] The present disclosure described herein above has several economic advantages including, but not limited to:
• cost-effectiveness, compared to the state-of-the-art equipment used for controlling the operation of a fan.
[0085] The embodiments herein and the various features and advantageous details thereof are explained with reference to the non-limiting embodiments in the following description. Descriptions of well-known components and processing techniques are omitted so as to not unnecessarily obscure the embodiments herein. The examples used herein are intended merely to facilitate an understanding of ways in which the embodiments herein may be practiced and to further enable those of skill in the art to practice the embodiments herein. Accordingly, the examples should not be construed as limiting the scope of the embodiments herein.
[0086] The foregoing description of the specific embodiments so fully reveals the general nature of the embodiments herein that others can, by applying current knowledge, readily modify and/or adapt for various applications such specific embodiments without departing from the generic concept, and, therefore, such adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents of the disclosed embodiments. It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation. Therefore, while the embodiments herein have been described in terms of preferred embodiments, those skilled in the art will recognize that the embodiments herein can be practiced with modification within the spirit and scope of the embodiments as described herein.
[0087] The use of the expression “at least” or “at least one” suggests the use of one or more elements or ingredients or quantities, as the use may be in the embodiment of the disclosure to achieve one or more of the desired objects or results.
[0088] Any discussion of documents, acts, materials, devices, articles or the like that has been included in this specification is solely for the purpose of providing a context for the disclosure. It is not to be taken as an admission that any or all of these matters form a part of the prior art base or were common general knowledge in the field relevant to the disclosure as it existed anywhere before the priority date of this application.
[0089] The numerical values mentioned for the various physical parameters, dimensions or quantities are only approximations and it is envisaged that the values higher/lower than the numerical values assigned to the parameters, dimensions or quantities fall within the scope of the disclosure, unless there is a statement in the specification specific to the contrary.
[0090] While considerable emphasis has been placed herein on the components and component parts of the preferred embodiments, it will be appreciated that many embodiments can be made and that many changes can be made in the preferred embodiments without departing from the principles of the disclosure. These and other changes in the preferred embodiment as well as other embodiments of the disclosure will be apparent to those skilled in the art from the disclosure herein, whereby it is to be distinctly understood that the foregoing descriptive matter is to be interpreted merely as illustrative of the disclosure and not as a limitation. ,CLAIMS:WE CLAIM:
1. A smart regulator detection system (100) for controlling the operation of brushless direct current motor (BLDC) fans, the system (100) comprises:
an electric switch (102) to supply an input alternate current (AC) voltage;
a fan regulator (104) electrically connected to the electric switch and configured to drop the input AC voltage when operated by a user; and
a BLDC fan (106) electrically connected to the electric switch (102) through the fan regular (104), wherein the BLDC fan (106) includes:
a detection unit (110) configured to receive the input AC voltage, compare the input AC voltage with an AC operating voltage range of the BLDC fan (106), and generate an impulse signal based on the comparison; and
a microcontroller (108) configured to receive the generated impulse signal from the detection unit (110) for controlling the operation of the BLDC fan (106).
2. The system as claimed in claim 1, wherein the detection unit (110) is configured to generate a high impulse signal when the input AC voltage is detected less than the AC operating voltage range, and further configured to generate a low impulse signal when the input AC voltage is within the AC operating voltage range.
3. The system as claimed in claim 2, wherein the microcontroller (108) is configured to receive the high impulse signal from the detection unit (110), and further configured to turn off the BLDC fan (102) for a predefined time period based on high impulse signal.
4. The system as claimed in claim 2, wherein the microcontroller (108) is configured to receive the low impulse signal from the detection unit (110), further configured to perform pulse count of the low impulse signal, and further configured to turn on the BLDC fan (106) when the pulse count is less than a pre-set threshold value.
5. The system as claimed in claim 4, wherein the microcontroller (108) is configured to notify the user of the BLDC fan (106) when the pulse count is more than the pre-set threshold value.
6. The system as claimed in claim 5, wherein the microcontroller (108) is configured to notify the user by a constant blinking of a light emitting diode (LED) (112) on the BLDC fan (106).
7. The system as claimed in claim 2, wherein the detection unit (110) is configured to generate the high impulse signal when a voltage drop occurs due to the operation of the fan regulator (104).
8. A method (400) for controlling the operation of brushless direct current motor (BLDC) fans, the method (400) comprises:
receiving, by a detection unit (110), an input alternate current (AC);
comparing, by the detection unit (110), the input alternate current (AC) with an AC operating voltage of a BLDC fan (106);
generating, by the detection unit (110), an impulse signal based on the comparison; and
receiving, by a microcontroller (108), the generated impulse signal from the detection unit (110) for controlling the operation of the BLDC fan (106).
9. A method (500) for user notification, the method (500) comprises:
detecting, by a detection unit (110), the input alternate current (AC) voltage below an AC operating voltage of a BLDC fan (106);
receiving, by a microcontroller (108), an impulse signal generated by the detection unit (110); and
constantly blinking, by the microcontroller (108), a light emitting diode (LED) (112) on the BLDC fan (106) for notifying a user of the BLDC fan (106).
10. The method (500) as claimed in claim 9, wherein the notification is selected from a group of an audio-visual and haptic illumination on the BLDC fan (106) and/or remote controller and/or mobile device application and/or any other connected IoT device.

Dated this 28th day of December, 2023

_______________________________
MOHAN RAJKUMAR DEWAN, IN/PA – 25
of R.K.DEWAN & CO.
Authorized Agent of Applicant

TO,
THE CONTROLLER OF PATENTS
THE PATENT OFFICE, AT MUMBAI