Magnetic resonance power supply apparatus

• US 10,476,319 B2
• Filed: 01/02/2018
• Issued: 11/12/2019
• Est. Priority Date: 07/09/2015
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Azami, Toshihiro, Uchida, Akiyoshi
• Primary Examiner(s): Perez Borroto, Alfonso
• Assistant Examiner(s): Yeshaw, Esayas G
• Application Number:
  US15/860,309
• Publication Number:
  US 20180145545A1
• Time in Patent Office: 679 Days
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/40 using two or more transmitting or receiving devices H02J50/50 takes precedence
• CPC Class Codes: H02J 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• CPC Class Codes: H02J 7/04 Regulation of charging current or voltage

Abstract

A communication circuit receives information enabling computation of a power supply efficiency of the highest-priority power receiving device when supplying power to the power receiving devices as the power supply targets. A power supply circuit is capable of supplying power to a plurality of power receiving devices. A processor computes the power supply efficiency of the highest-priority power receiving device when supplying power to the power receiving devices as the power supply targets, decides the power receiving devices as the power supply targets so that an estimated supplied power is within a power supply capacity of the power supply circuit when supplying power to the power receiving devices as the power supply targets, and controls power supply so as to supply power to the decided the power receiving devices as the power supply targets.

Claims

1. A magnetic resonance power supply apparatus comprising:

a communication circuit configured to receive, from a highest-priority power receiving device having a highest power supply priority level from among a plurality of power receiving devices inside a power supply availability zone, information enabling computation of a power supply efficiency of the highest-priority power receiving device when supplying power to the power receiving devices as power supply targets including the highest-priority power receiving device;

a power supply circuit configured to supply power to a plurality of power receiving devices; and

a processor configured to;

compute the power supply efficiency of the highest-priority power receiving device when supplying power to the power receiving devices as the power supply targets including the highest-priority power receiving device, from the information received by the communication device, and

decide, based on the computed power supply efficiency of the highest-priority power receiving device, the power receiving devices as the power supply targets so that an estimated supplied power is within a power supply capacity of the power supply circuit when supplying power to the power receiving devices as the power supply targets including the highest-priority power receiving device, and

control power supply so as to supply power to the decided the power receiving devices as power supply targets.

2. The magnetic resonance power supply apparatus according to claim 1, wherein

the processor computes the estimated supplied power using the power supply efficiency of the highest-priority power receiving device, and when the computed estimated supplied power is less than the power supply capacity of the power supply circuit, the processor adds a power receiving device other than the highest-priority power receiving device to the power supply target in order of highest power supply priority level until the estimated supplied power exceeds the power supply capacity of the power supply circuit, and thereby decides the power receiving devices as the power supply targets so that the estimated supplied power is maximized and also so that the estimated supplied power remains within the power supply capacity of the power supply circuit.

3. The magnetic resonance power supply apparatus according to claim 2, wherein

when the estimated supplied power while supplying power to the power receiving devices as the power supply targets exceeds the power supply capacity of the power supply circuit, instead of the power receiving device with the lowest power supply priority level among the power receiving devices as the power supply targets, the processor includes, into the power supply targets, the power receiving device selected in order of highest power supply priority level from the power receiving devices not included in the power supply targets, and repeats until the estimated supplied power becomes less than or equal to the power supply capacity of the power supply circuit.

4. The magnetic resonance power supply apparatus according to claim 1, wherein

the communication circuit receives the information from each of the plurality of power receiving devices, and

from the information received by the communication circuit, the processor computes the power supply efficiency of each of the power receiving devices as the power supply targets when supplying power to the power receiving devices as the power supply targets, computes a supplied power loss on the basis of the computed power supply efficiency, and decides the power receiving devices as the power supply targets so that the computed supplied power loss does not exceed an allowed power supply loss, and so that the estimated supplied power is maximized while also remaining within the power supply capacity of the power supply circuit.

5. The magnetic resonance power supply apparatus according to claim 1, wherein

the magnetic resonance power supply apparatus supplies a test power of a predetermined value to power receiving devices as power supply target candidates,

the communication circuit receives a rated received power and a received power of the highest-priority power receiving device as the information from the highest-priority power receiving device included among the power supply target candidates, and

the processor computes the power supply efficiency of the highest-priority power receiving device on the basis of the received power of the highest-priority power receiving device received by the communication circuit and the test power, and computes the estimated supplied power on the basis of the rated received power and the computed power supply efficiency of the highest-priority power receiving device when supplying power to the power receiving devices as the power supply target candidates.

6. The magnetic resonance power supply apparatus according to claim 4, wherein

the magnetic resonance power supply apparatus supplies a test power of a predetermined value to the power receiving devices as power supply target candidates,

the communication circuit receives a rated received power of the highest-priority power receiving device as the information from the highest-priority power receiving device included among the power supply target candidates, and receives a received power of each of the power receiving devices as the information from each of the power receiving devices included among the power supply target candidates, and

the processor computes the power supply efficiency of the highest-priority power receiving device on the basis of the received power of the highest-priority power receiving device received by the communication circuit and the test power, computes the estimated supplied power on the basis of the rated received power and the computed power supply efficiency of the highest-priority power receiving device when supplying power to the power receiving devices as the power supply target candidates, computes the power supply efficiency of each of the power receiving devices on the basis of a sum of the received power received from each of the power receiving devices and the test power, to compute an estimated received power on the basis of multiplies the computed power supply efficiency of each of the power receiving devices by the estimated supplied power when supplying power to the power receiving devices power supply target candidates, and subtracts the estimated received power from the estimated supplied power to compute the supplied power loss.

7. The magnetic resonance power supply apparatus according to claim 1, further comprising:

a storage that stores in advance power supply efficiencies of each power receiving device associated with a distance from the magnetic resonance power supply apparatus, and a direction and an attitude with respect to the magnetic resonance power supply apparatus, of each of the power receiving devices, wherein

the communication circuit receives a rated received power of the highest-priority power receiving device as the information from the highest-priority power receiving device included among power supply target candidates, and receives status information regarding each of the power receiving devices as the information from each of the power receiving devices included among the power supply target candidates, and

the processor acquires a power supply efficiency of the highest-priority power receiving device from the power supply efficiencies stored in the storage, based on the distance, direction, and attitude of each of the power receiving devices acquired based on the status information, and computes the estimated supplied power on the basis of the rated received power and the power supply efficiency of the highest-priority power receiving device.

8. The magnetic resonance power supply apparatus according to claim 4, further comprising:

a storage that stores in advance power supply efficiencies of each power receiving device associated with a distance from the magnetic resonance power supply apparatus, and a direction and an attitude with respect to the magnetic resonance power supply apparatus, of each of the power receiving devices, wherein

the communication circuit receives a rated received power of the highest-priority power receiving device as the information from the highest-priority power receiving device included among power supply target candidates, and receives status information regarding each of the power receiving devices as the information from each of the power receiving devices included among the power supply target candidates, and

the processor acquires a power supply efficiency of the highest-priority power receiving device from the power supply efficiencies stored in the storage, based on the distance, direction, and attitude of each of the power receiving devices acquired based on the status information, to compute the estimated supplied power on the basis of the rated received power and the power supply efficiency of the highest-priority power receiving device, computes an estimated received power on the basis of multiplication a sum of the respective power supply efficiencies of the power receiving devices included in the power supply targets by the estimated supplied, and computes the supplied power loss on the basis of subtraction the estimated received power from the estimated supplied power.

9. The magnetic resonance power supply apparatus according to claim 1, wherein

the power supply priority level is decided based on at least one of an order in which the communication circuit receives the information from the individual power receiving devices in the case of the communication circuit receiving the information from each of the plurality of power receiving devices, a remaining battery level of each power receiving device, a power supply availability time of each power receiving device, and a priority level set in advance by a user.