Search

JP-7857247-B2 - Power receiving device, power supply device, power supply system, and method

JP7857247B2JP 7857247 B2JP7857247 B2JP 7857247B2JP-7857247-B2

Inventors

  • 足立 朋子
  • 三友 敏也

Assignees

  • 株式会社東芝

Dates

Publication Date
20260512
Application Date
20230327

Claims (19)

  1. A power receiving unit that receives power and converts the signal based on the power received into DC power , A measuring unit for measuring the amount of energy of the DC power, A processing unit that determines whether the amplitude of the signal based on the power reception is constant based on whether the amount of power falls within a predetermined range, A communication unit that, when it is determined that the amplitude is constant, transmits a signal containing information about the amount of power, and when it is determined that the amplitude is not constant, does not transmit the signal. A power receiving device equipped with the following features.
  2. A power receiving unit that receives power and converts the signal based on the power received into DC power , A measuring unit for measuring the amount of energy of the DC power, A processing unit that determines whether the amplitude of the signal based on the power reception decreases by a certain percentage according to the amount of power, and determines whether the amplitude of the signal based on the power reception increases by a certain percentage , A power receiving device equipped with the following features.
  3. When it is determined that the amplitude decreases or increases by a certain rate, a signal containing information about the amount of power is transmitted. If the communication unit determines that the amplitude does not decrease at a constant rate and does not increase at a constant rate, it will not transmit the signal. The power receiving device according to claim 2, further comprising :
  4. A power receiving unit that receives power and converts the signal based on the received power into DC power, A measuring unit for measuring the amount of energy of the DC power, A processing unit that determines whether the received second time length matches the first time length, A communication unit that, when it is determined that the second time length matches the first time length, transmits a signal containing information about the amount of power, and when it is determined that the second time length does not match the first time length, does not transmit the signal. To have a power receiving device.
  5. The power receiving device according to claim 4, wherein the communication unit receives a wireless signal indicating the first time length for which the power supply device wirelessly supplies power.
  6. The communication unit receives a first signal indicating a request to measure the amount of power . The power receiving device according to claim 1 or claim 3 .
  7. The system further includes a measuring unit for measuring the aforementioned amount of electrical energy, The processing unit includes a clock unit that records the first time the power receiving unit receives power , When the communication unit determines that the second time length matches the first time length, it transmits a signal indicating the first time along with information regarding the amount of power . The power receiving device according to claim 4 .
  8. The power receiving unit that receives power, A measuring unit for measuring the frequency of the signal based on the aforementioned power reception , The system includes a processing unit that determines whether the time variation of the frequency is within a predetermined positive range or within a predetermined negative range, and Power receiving device.
  9. The processing unit determines within a predetermined time whether any one of the following cases applies: the time change of the frequency is within the positive fourth range; the time change of the frequency is within the negative fifth range; the time change of the frequency is within the positive sixth range in the first time period and within the negative seventh range in the second time period; or the time change of the frequency is within the negative eighth range in the third time period and within the positive ninth range in the fourth time period. The power receiving device according to claim 8 .
  10. The power receiving unit that receives power, A measuring unit that measures the frequency spectrum based on the received signal , A processing unit that determines whether at least one of the width of the frequency spectrum and the time variation of the frequency spectrum in a first frequency range is within a predetermined range , A power receiving device equipped with the following features.
  11. A power receiving device according to any one of claims 1 to 5, or any one of claims 7 to 10, A power supply device, A processing unit that controls the power supply, A communication unit receives a signal from a power receiving device indicating the amount of power received, which is generated based on the DC power measured in the power receiving device in accordance with the power supply. Equipped with, The processing unit causes the power supply to be performed based on the signal indicating the amount of power received. A power supply system comprising a power supply device.
  12. The power supply device further comprises a power supply unit which supplies power by the processing unit of the power supply device. The power supply system according to claim 11.
  13. The processing unit of the power supply device determines at least one of the following based on the signal indicating the amount of power received: time period, duration, amplitude, phase, frequency band, or direction of power supply. The power supply system according to claim 11.
  14. The signal indicating the amount of power received includes information indicating the statistics of the DC power. The power supply system according to claim 11.
  15. A power receiving device according to any one of claims 1 to 5, or any one of claims 7 to 10 , A power supply device that provides power , A power supply system equipped with the following features.
  16. It receives power, converts the signal based on the received power into DC power, The amount of energy of the aforementioned DC power is measured, Whether the amount of power falls within a predetermined range determines whether the amplitude of the signal based on the power reception is constant. If it is determined that the amplitude is constant, a signal containing information about the amount of power is transmitted; if it is determined that the amplitude is not constant, the signal is not transmitted. method .
  17. It receives power, converts the signal based on the received power into DC power, The amount of energy of the aforementioned DC power is measured, Whether the amount of power falls within a predetermined range determines whether the amplitude of the signal based on the power reception decreases at a constant rate, or whether the time change of the amount of power falls within a positive predetermined range determines whether the amplitude of the signal based on the power reception increases at a constant rate. method.
  18. When it is determined that the amplitude decreases or increases by a certain rate, a signal containing information about the amount of power is transmitted. If it is determined that the amplitude does not decrease at a constant rate and does not increase at a constant rate, the signal is not transmitted. The method according to claim 17, further comprising the above.
  19. It receives power, converts the signal based on the received power into DC power, The amount of energy of the aforementioned DC power is measured, Determine whether the received second time length matches the first time length. If it is determined that the second time length matches the first time length, a signal containing information about the amount of power is transmitted; if it is determined that the second time length does not match the first time length, the signal is not transmitted. method.

Description

Embodiments of the present invention relate to power receiving devices, power supply devices, power supply systems, and methods. Wireless power transfer technology using electromagnetic waves is being developed. When wireless power transfer coexists with other wireless communication systems, it becomes necessary to distinguish between signals for wireless power transfer and signals for wireless communication. Japanese Patent Publication No. 2019-140900 A schematic diagram of the power supply system 100 in the first embodiment.An example of the configuration of the power supply device 1 in the first embodiment.An example of the configuration of the power receiving device 2 in the first embodiment.A sequence diagram showing a first example of operation of the power supply device 1 and the power receiving device 2 in the first embodiment.A sequence diagram showing a second example of operation of the power supply device 1 and the power receiving device 2 in the first embodiment.A sequence diagram showing a third example of operation of the power supply device 1 and the power receiving device 2 in the first embodiment.A flowchart illustrating an example of the operation of the power supply device 1 in the first embodiment.This figure shows a first example of the amplitude of the wireless power transmission signal of the power supply device 1 in the first embodiment.This figure shows a second example of the amplitude of the wireless power transmission signal of the power supply device 1 in the first embodiment.This figure shows a third example of the amplitude of the wireless power transmission signal of the power supply device 1 in the first embodiment.A diagram illustrating an example of the amplitude of wireless communication signals.This diagram shows an example of a power supply channel when power is supplied in the 5.7 GHz band.A flowchart illustrating an example of the operation of the power receiving device 2 in the first embodiment.An example configuration of the power receiving device 2' applicable to the first embodiment.This figure shows a first example of whether or not a signal indicating the power received by the power receiving device 2 needs to be transmitted in a modified example.This figure shows a second example of whether or not it is necessary to transmit a signal indicating the power received by the power receiving device 2 in a modified example.This figure shows a third example of whether or not it is necessary to transmit a signal indicating the power received by the power receiving device 2 in a modified example.An example configuration of the power supply device 1' applicable to the first embodiment.An example configuration of the power receiving device 2" applicable to the first embodiment.A sequence diagram showing an example of the operation of the power supply device 1' and power receiving device 2'' in a modified example.An example configuration of the power receiving device 2' applicable to the first embodiment.A diagram showing an example of the frequency of the wireless power transmission signal of power supply device 1 in a modified example.An example configuration of the power receiving device 2'' applicable to the first embodiment. The following describes embodiments for carrying out the invention with reference to the drawings. This disclosure is merely an example, and the invention is not limited by the descriptions of the embodiments below. Modifications that are easily conceivable by those skilled in the art are naturally included within the scope of the disclosure. For clarity, the drawings may schematically represent parts with modified sizes, shapes, etc., compared to the actual embodiments. In some cases, the same reference numerals are used for corresponding elements in multiple drawings, and detailed explanations are omitted. (First embodiment) Figure 1 is a schematic diagram of the power supply system 100 in the first embodiment. The power supply system 100 includes a power supply device 1, and power receiving devices 2A and 2B. Hereafter, when power receiving devices 2A and 2B are referred to collectively, or when describing common parts, they will simply be referred to as power receiving device 2. In the power supply system 100 of Figure 1, there is one power supply device 1 and two power receiving devices 2, but there is no limit to the number of power supply devices 1 and power receiving devices 2. In the power supply system 100, wireless power supply (wireless power transmission) is performed from power supply device 1 to power receiving devices 2. Hereafter, the signal for wireless power supply will also be referred to as the wireless power supply signal. Power receiving device 2 receives the wireless power supply signal from power supply device 1 and generates DC power. (Hereafter, this will also be referred to as receiving power.) When wirelessly transferring power from power supply device 1 to power receiving device 2, power supply device 1 may perform a