A System And A Method For Improving Charging Performance And Spatial Freedom Of Wireless Charger
Abstract:
ABSTRACT
A SYSTEM AND A METHOD FOR IMPROVING CHARGING PERFORMANCE AND SPATIAL FREEDOM OF WIRELESS CHARGER
The present subject matter disclosed herein relates to a method (500) improving charging performance and spatial freedom of charging area on a wireless charger provided in a vehicle by using a quality estimation technique by receiving (501) an analog ping in a standby phase from a wireless power transmitter (102), checking (502) if open FOD (foreign object detection) is detected, determining (503) the Q factor, assigning (504) a pre-defined threshold limit based on the range and further charging (505) the receiver (101) based on the assigned pre-defined threshold limits determined by the quality estimation technique. The system includes a wireless power transmitter (102), a receiver (101) and a processing unit (201) configured to determine the Q factor and determine charging power transfer.
REFER FIGURE. 1 AND FIGURE. 5
Specification
Description:A SYSTEM AND A METHOD FOR IMPROVING CHARGING PERFORMANCE AND SPATIAL FREEDOM OF WIRELESS CHARGER
TECHNICAL FIELD
[0001] The present subject matter described herein relates to wireless power transfer. In particular, the present subject matter relates to a method and a system for improving charging performance and spatial freedom of a charging area on a wireless charger provided in a vehicle.
BACKGROUND
[0002] Background description includes information that may be useful in understanding the present subject matter. It is not an admission that any of the information provided herein is prior art or relevant to the presently claimed invention, or that any publication specifically or implicitly referenced is prior art.
[0003] A wireless power transfer (or transmission) relates to wirelessly transferring (or transmitting) power between a power source (wireless charger/wireless power transmitter) and an electronic device (smartphone/receiver). For example, the wireless power transfer technique provides a provision for allowing the battery of a wireless device, to be recharged by simply loading the wireless device on a wireless charging pad.
[0004] A wireless power transmission system may include a wireless power transmitter that supplies electric energy via a wireless power transfer method, and a wireless power receiver that receives the electric energy supplied by the wireless power transmitter and supplies it to a receiver, such as a battery cell.
[0005] The transferring of power is done by using magnetic coupling. The magnetic coupling methods are classified as magnetic induction and magnetic resonance methods. The magnetic induction method is a method of power transmission that uses electric currents induced in a receiver's coil by a magnetic field generated by a transmitter's coil battery cell, in accordance with electromagnetic coupling between a transmitting coil and a receiving coil. The magnetic resonance method uses a magnetic field, similar to the magnetic induction method.
[0006] The power transfer works on three phases. The first one is a pinging phase where the transmitter detects the receiver and initiate communication. The second one is a handshaking phase where communication is established between the receiver and the transmitter to exchange continuous communication. The last one is a power transfer phase where the transmitter transfers the power to the receiver.
[0007] In an existing design, the receiver/smartphone is able to be charged only at the center of the charging area i.e. wireless chargers have restricted or adefined charging area. Further, if there is a presence of foreign object on the wireless charger, it deteriorates the performance and the presence of the metal object also raises safety concerns due to the to a rise in temperature. Moreover, the present charging methods adopted are inefficient as there is no provision of initiating charging based on the power loss due to presence of the foreign object or misalignment of the receiver.
[0008] Therefore, there is a need to provide a system and a method for improving charging performance and spatial freedom of charging area on the wireless charger by measuring power loss and quality factor.
OBJECTS OF THE DISCLOSURE
[0009] It forms an object of the present disclosure to overcome the aforementioned and other drawbacks/limitations in the existing solutions available in the form of related prior arts.
[0010] It is a primary object of the present disclosure to provide a system and a method for improving charging performance and spatial freedom of a charging area on a wireless charger by measuring power loss and quality factor.
[0011] It is another object of the present disclosure for detecting a presence of a foreign object on the wireless charger.
[0012] It is another object of the present disclosure to initiate a dynamic FOD (foreign object detection) range to initiate charging at all locations without any interruption and detect the foreign object simultaneously.
[0013] It is another object of the present disclosure to determine a quality factor range and assign pre-defined threshold limits to the transmitter for charging purposes.
[0014] These and other objects and advantages of the present subject matter will be apparent to a person skilled in the art after consideration of the following detailed description taken into consideration with accompanying drawings in which preferred embodiments of the present subject matter are illustrated.
SUMMARY
[0015] A solution to one or more drawbacks of existing technology and additional advantages are provided through the present disclosure. Additional features and advantages are realized through the technicalities of the present disclosure. Other embodiments and aspects of the disclosure are described in detail herein and are considered to be a part of the claimed disclosure.
[0016] The present disclosure offers a solution in the form of a method for improving charging performance and spatial freedom of charging area on a wireless charger provided in a vehicle by using a quality estimation technique. The steps include receiving an analog ping in a standby phase from a wireless power transmitter and establishing a communication between the wireless power transmitter and a receiver, checking if open FOD (Foreign Object Detection) is detected and assigning variable X and variable Y, wherein a signal is sent to a display unit in case variable Y is detected, wherein the wireless power transmitter is on a standby phase in case variable X is detected to detect the receiver and initiate communication in a handshaking phase to determine a quality factor (Q factor); determining the Q factor by selectively finding a range out of a plurality of pre-determined ranges on basis of power loss, assigning a pre-defined threshold limit based on the range determined by the quality estimation technique and charging the receiver based on the assigned pre-defined threshold limits determined by the quality estimation technique at all locations of the wireless power transmitter
[0017] In an aspect of the invention, the Q factor is a coupling quality based on an alignment of a wireless power transmitter coil and a receiver coil. Q Factor i.e. coupling quality is determined when the transmitter coil send a current/voltage impulse and the dieing out of the pulse (energy ripples) is being measured to determine the quality factor.
[0018] In an aspect of the invention, the variable X is detected when the foreign object is initially placed on the wireless power transmitter and the value of variable X=1.
[0019] In an aspect of the invention, the variable Y is detected when the foreign object is placed after a time ‘t’ and the value of variable Y=0.
[0020] In an aspect of the invention, a first range of the Q factor is = >Q1 and the first threshold limit at the first range of the Q factor is P1 mW.
[0021] In an aspect of the invention, a second range of the Q factor is between Q1 > Q Factor > Q2 and the second threshold limit at the second range of the Q factor is P2mW.
[0022] In an aspect of the invention, a third range of the Q factor is Q1.
[0060] In (312), if YES, then the wireless power transmitter (102) transfer the power at a first threshold limit at the first range of the Q factor i.e. P1 mW.
[0061] In (313), if No, then the Q factor is set at maximum.
[0062] In (314), the wireless power transmitter (102) transfer initiate charging at all locations based on the power loss and quality estimation technique.
[0063] Referring to Fig. 4, it shows the quality range in the quality estimation technique (300).
[0064] In (401), the quality estimation technique checks the range of Q factor. If the Q factor measured is in the first range of Q factor = >Q1, if Yes, then the first threshold limit is P1 mW (402).
[0065] In (403), if NO, then the system checks whether the Q factor measured is in the second range of Q1 > Q Factor > Q2, if Yes, then the second threshold limit is P2 mW (404).
[0066] In (405), if NO, then the system checks whether the Q factor measured is in the third range of the Q factor is Q1. The second range of the Q factor is between Q1 > Q Factor > Q2 and the the third range of the Q factor is Q1,
wherein the first threshold limit at the first range of the Q factor is P1 mW.
6. The method (500) as claimed in claim 1, wherein a second range of the Q factor is between Q1 > Q Factor > Q2,
wherein the second threshold limit at the second range of the Q factor is P2 mW.
7. The method (500) as claimed in claim 1, wherein a third range of the Q factor is
Documents
Application Documents
| # |
Name |
Date |
| 1 |
202211037761-STATEMENT OF UNDERTAKING (FORM 3) [30-06-2022(online)].pdf |
2022-06-30 |
| 2 |
202211037761-FORM 1 [30-06-2022(online)].pdf |
2022-06-30 |
| 3 |
202211037761-FIGURE OF ABSTRACT [30-06-2022(online)].jpg |
2022-06-30 |
| 4 |
202211037761-DRAWINGS [30-06-2022(online)].pdf |
2022-06-30 |
| 5 |
202211037761-DECLARATION OF INVENTORSHIP (FORM 5) [30-06-2022(online)].pdf |
2022-06-30 |
| 6 |
202211037761-COMPLETE SPECIFICATION [30-06-2022(online)].pdf |
2022-06-30 |
| 7 |
202211037761-FORM 18 [28-07-2022(online)].pdf |
2022-07-28 |
| 8 |
202211037761-FORM-26 [17-08-2022(online)].pdf |
2022-08-17 |
| 9 |
202211037761-GPA-240822.pdf |
2022-09-05 |
| 10 |
202211037761-Correspondence-240822.pdf |
2022-09-05 |
| 11 |
202211037761-Proof of Right [15-11-2022(online)].pdf |
2022-11-15 |
| 12 |
202211037761-Others-291222.pdf |
2023-01-06 |
| 13 |
202211037761-Correspondence-291222.pdf |
2023-01-06 |
| 14 |
202211037761-FER.pdf |
2024-04-30 |
| 15 |
202211037761-POA [28-06-2024(online)].pdf |
2024-06-28 |
| 16 |
202211037761-FORM 13 [28-06-2024(online)].pdf |
2024-06-28 |
| 17 |
202211037761-AMENDED DOCUMENTS [28-06-2024(online)].pdf |
2024-06-28 |
| 18 |
202211037761-FORM 3 [30-07-2024(online)].pdf |
2024-07-30 |
| 19 |
202211037761-FER_SER_REPLY [05-08-2024(online)].pdf |
2024-08-05 |
| 20 |
202211037761-CLAIMS [05-08-2024(online)].pdf |
2024-08-05 |
| 21 |
202211037761-FORM-8 [28-10-2025(online)].pdf |
2025-10-28 |
| 22 |
202211037761-US(14)-HearingNotice-(HearingDate-15-12-2025).pdf |
2025-11-10 |
Search Strategy
| 1 |
search7761E_29-04-2024.pdf |