Granted Patent B2

US 11,128,180 · App. 15/836,904 · Granted Sep 21, 2021

Inventors: Ming-Chiu Tsai (New Taipei, TW); Chi-Che Chan (New Taipei, TW)

Assignee: Fu Da Tong Technology Co., Ltd.

H02J50/80H02J7/025H02J50/12H02J50/40H02J50/90H02J7/00034H02J7/00045

Abstract

Claims (74)

1. A method of detecting a receiving-end module, for a supplying-end module of an induction type power supply system, the supplying-end module comprising a supplying-end coil, the method comprising:

enabling a learning mode and obtaining a frequency of the supplying-end coil when there is no object put in a sensing area of the supplying-end coil in the learning mode, and storing the frequency as a basic frequency;

detecting the supplying-end coil to obtain a self-resonant frequency of the supplying-end coil;

comparing the self-resonant frequency with the basic frequency detected on the supplying-end coil to determine whether the self-resonant frequency is smaller than the basic frequency; and

performing the following steps when the self-resonant frequency is determined to be smaller than the basic frequency and the degree of the self-resonant frequency smaller than the basic frequency exceeds a threshold:

obtaining a first output power level corresponding to the self-resonant frequency; and

sending an activation signal with the first output power level, and starting to supply electric power when a data code corresponding to the activation signal is received;

wherein in the learning mode, when the receiving-end module is disposed in the sensing area of the supplying-end coil and the receiving-end module is configured to have no load, the method further comprises the following steps:

supplying power to the receiving-end module, and measuring the self-resonant frequency of the supplying-end coil and measuring at least one of an operating frequency and a no-load output voltage of the supplying-end coil when the receiving-end module is respectively located in different positions in the sensing area; and

mapping the self-resonant frequency to the operating frequency or the no-load output voltage obtained in each of the positions, and storing the mapping relations.

2. The method of claim 1 , wherein the step of obtaining the first output power level corresponding to the self-resonant frequency comprises:

obtaining the no-load output voltage corresponding to the self-resonant frequency, and configuring the first output power level according to the no-load output voltage.

3. The method of claim 1 , wherein in the learning mode, when the receiving-end module is disposed in the sensing area of the supplying-end coil and the receiving-end module is configured to have full load, the method further comprises the following steps:

supplying power to the receiving-end module, and measuring the self-resonant frequency of the supplying-end coil and measuring at least one of an operating frequency and a full-load output voltage of the supplying-end coil when the receiving-end module is respectively located in different positions in the sensing area; and

mapping the self-resonant frequency to the operating frequency or the full-load output voltage obtained in each of the positions, and storing the mapping relations.

4. The method of claim 3 , further comprising:

obtaining the full-load output voltage corresponding to the self-resonant frequency measured during operations of the supplying-end coil, and configuring a maximum output power of the supplying-end coil accordingly.

5. The method of claim 1 , wherein when the supplying-end module does not receive the data code corresponding to the activation signal, the method further comprises the following steps:

resending the activation signal;

stopping sending the activation signal and detecting the self-resonant frequency of the supplying-end coil when the number of times the activation signal is sent reaches a specific number and the data code is not received; and

restarting to perform the steps in claim 1 when detecting that the self-resonant frequency of the supplying-end coil changes.

6. The method of claim 1 , wherein the supplying-end coil supplies electric power with the first output power level when the data code corresponding to the activation signal is received.

7. The method of claim 1 , wherein the step of obtaining the first output power level corresponding to the self-resonant frequency is performed after the self-resonant frequency stops changing for a period of time.

8. The method of claim 1 , further comprising:

stopping supplying electric power when the self-resonant frequency is determined to be close to or greater than the basic frequency.

9. A supplying-end module for an induction type power supply system, for detecting a receiving-end module of the induction type power supply system, the supplying-end module comprising:

a supplying-end coil; and

a processor, configured to perform the following steps:

enabling a learning mode and obtaining a frequency of the supplying-end coil when there is no object put in a sensing area of the supplying-end coil in the learning mode, and storing the frequency in the memory as a basic frequency;

detecting the supplying-end coil to obtain a self-resonant frequency of the supplying-end coil;

comparing the self-resonant frequency with the basic frequency detected on the supplying-end coil to determine whether the self-resonant frequency is smaller than the basic frequency; and

performing the following steps when the self-resonant frequency is determined to be smaller than the basic frequency and the degree of the self-resonant frequency smaller than the basic frequency exceeds a threshold:

obtaining a first output power level corresponding to the self-resonant frequency; and

controlling the supplying-end coil to send an activation signal with the first output power level, and controlling the supplying-end coil to start to supply electric power when a data code corresponding to the activation signal is received;

wherein in the learning mode, when the receiving-end module is disposed in the sensing area of the supplying-end coil and the receiving-end module is configured to have no load, the processor further performs the following steps:

supplying power to the receiving-end module, and measuring the self-resonant frequency of the supplying-end coil and measuring at least one of an operating frequency and a no-load output voltage of the supplying-end coil when the receiving-end module is respectively located in different positions in the sensing area; and

mapping the self-resonant frequency to the operating frequency or the no-load output voltage obtained in each of the positions, and storing the mapping relations in the memory.

10. The supplying-end module of claim 9 , wherein the step of obtaining the first output power level corresponding to the self-resonant frequency comprises:

obtaining the no-load output voltage corresponding to the self-resonant frequency, and configuring the first output power level according to the no-load output voltage.

11. The supplying-end module of claim 9 , wherein in the learning mode, when the receiving-end module is disposed in the sensing area of the supplying-end coil and the receiving-end module is configured to have full load, the processor further performs the following steps:

supplying power to the receiving-end module, and measuring the self-resonant frequency of the supplying-end coil and measuring at least one of an operating frequency and a full-load output voltage of the supplying-end coil when the receiving-end module is respectively located in different positions in the sensing area; and

mapping the self-resonant frequency to the operating frequency or the full-load output voltage obtained in each of the positions, and storing the mapping relations in the memory.

12. The supplying-end module of claim 11 , wherein the processor further performs the following step:

obtaining the full-load output voltage corresponding to the self-resonant frequency measured during operations of the supplying-end coil, and configuring a maximum output power of the supplying-end coil accordingly.

13. The supplying-end module of claim 9 , wherein when the supplying-end module does not receive the data code corresponding to the activation signal, the processor further performs the following steps:

resending the activation signal;

stopping sending the activation signal and detecting the self-resonant frequency of the supplying-end coil when the number of times the activation signal is sent reaches a specific number and the data code is not received; and

restarting to perform the steps in claim 9 when detecting that the self-resonant frequency of the supplying-end coil changes.

14. The supplying-end module of claim 9 , wherein the supplying-end coil supplies electric power with the first output power level when the data code corresponding to the activation signal is received.

15. The supplying-end module of claim 9 , wherein the step of obtaining the first output power level corresponding to the self-resonant frequency is performed after the self-resonant frequency stops changing for a period of time.

16. The supplying-end module of claim 9 , wherein the processor further performs the following step:

controlling the supplying-end coil to stop supplying electric power when the self-resonant frequency is determined to be close to or greater than the basic frequency.

17. A method of detecting a receiving-end module, for a supplying-end module of an induction type power supply system, the supplying-end module comprising a supplying-end coil, the method comprising:

enabling a learning mode and obtaining a frequency of the supplying-end coil when there is no object put in a sensing area of the supplying-end coil in the learning mode, and storing the frequency as a basic frequency;

detecting the supplying-end coil to obtain the self-resonant frequency of the supplying-end coil;

comparing the self-resonant frequency with the basic frequency detected on the supplying-end coil to determine whether the self-resonant frequency is smaller than the basic frequency; and

performing the following steps when the self-resonant frequency is determined to be smaller than the basic frequency and the degree of the self-resonant frequency smaller than the basic frequency exceeds a threshold:

obtaining a first output power level corresponding to the self-resonant frequency; and

sending an activation signal with the first output power level, and starting to supply electric power when a data code corresponding to the activation signal is received;

wherein in the learning mode, when the receiving-end module is disposed in the sensing area of the supplying-end coil and the receiving-end module is configured to have full load, the method further comprises the following steps:

supplying power to the receiving-end module, and measuring the self-resonant frequency of the supplying-end coil and measuring at least one of an operating frequency and a full-load output voltage of the supplying-end coil when the receiving-end module is respectively located in different positions in the sensing area; and

mapping the self-resonant frequency to the operating frequency or the full-load output voltage obtained in each of the positions, and storing the mapping relations.

18. A supplying-end module for an induction type power supply system, for detecting a receiving-end module of the induction type power supply system, the supplying-end module comprising:

a supplying-end coil; and

a processor, configured to perform the following steps:

enabling a learning mode and obtaining a frequency of the supplying-end coil when there is no object put in a sensing area of the supplying-end coil in the learning mode, and storing the frequency in the memory as a basic frequency

detecting the supplying-end coil to obtain a self-resonant frequency of the supplying-end coil;

comparing the self-resonant frequency with the basic frequency detected on the supplying-end coil to determine whether the self-resonant frequency is smaller than the basic frequency; and

performing the following steps when the self-resonant frequency is determined to be smaller than the basic frequency and the degree of the self-resonant frequency smaller than the basic frequency exceeds a threshold:

obtaining a first output power level corresponding to the self-resonant frequency; and

controlling the supplying-end coil to send an activation signal with the first output power level, and controlling the supplying-end coil to start to supply electric power when a data code corresponding to the activation signal is received;

wherein in the learning mode, when the receiving-end module is disposed in the sensing area of the supplying-end coil and the receiving-end module is configured to have full load, the processor further performs the following steps:

supplying power to the receiving-end module, and measuring the self-resonant frequency of the supplying-end coil and measuring at least one of an operating frequency and a full-load output voltage of the supplying-end coil when the receiving-end module is respectively located in different positions in the sensing area; and

mapping the self-resonant frequency to the operating frequency or the full-load output voltage obtained in each of the positions, and storing the mapping relations in the memory.

Assignments (1)

Priority Claims (9)

Continuity (13)