Wireless power transmission control device, wireless power transmission system, and wireless power transmission control method

Patent metadata

Field	Value
Publication number	US-2016336805-A1
Application number	US-201515110836-A
Country	US
Kind code	A1
Filing date	Jan 15, 2015
Priority date	Jan 29, 2014
Publication date	Nov 17, 2016
Grant date	—

Abstract

In order to stably supply power even under a condition such that variations in a transmission environment occur constantly and irregularly in a wireless power transmission, a wireless power transmission control device of the present invention includes: a data collection means for obtaining data indicating the characteristics of a transmission medium for wireless transmission of power via a receiving antenna provided in a movable body; a data prediction means for deriving predicted transmission characteristics that predict a change in the characteristics of the transmission medium by using the data and for calculating a control parameter corresponding to the predicted transmission characteristics; and a parameter control means for controlling the movable body and the receiving antenna by using the control parameter.

First claim

1 . A control device for wireless power transmission, comprising:
a data collection unit which acquires data indicating a characteristic of a transmission medium when power is wirelessly transmitted via a power receiving antenna provided to a movable body; a data prediction unit which derives a predicted transmission characteristic by predicting a change in the characteristic of the transmission medium by using the data and calculates a control parameter corresponding to the predicted transmission characteristic; and a parameter control unit which performs control of the movable body and the power receiving antenna by using the control parameter.

2 . The control device for wireless power transmission according to claim 1 , wherein the control parameter comprises a parameter for deciding a position of the movable body, a parameter for deciding a frequency of the power receiving antenna, and a parameter for deciding a load of the power receiving antenna.

3 . The control device for wireless power transmission according to claim 1 , wherein the data collection unit comprises a plurality of sensors that detect the data, and the sensors detect different characteristics of the transmission medium.

4 . The control device for wireless power transmission according to claim 1 , wherein the control parameter is a parameter that optimizes power transmission efficiency.

5 . The control device for wireless power transmission according to claim 1 , wherein the control parameter is a parameter with which a response speed in performing the control is optimal.

6 . The control device for wireless power transmission according to claim 1 , further comprising:
a movable body control unit which controls a position of the movable body, wherein the movable body control unit comprises a plurality of posture control unit corresponding to each axis of a coordinate system.

7 . The control device for wireless power transmission according to claim 1 , further comprising:
an antenna control unit which performs control of the power receiving antenna, wherein the antenna control unit comprises: a load control unit which controls load of the power receiving antenna; and a frequency control unit which controls frequency of the power receiving antenna.

8 . The control device for wireless power transmission according to claim 1 , wherein the transmission medium is seawater and the characteristic comprises at least one of temperature, flow rate, and pressure of the seawater.

9 . A control method of wireless power transmission, comprising:
acquiring data indicating a characteristic of a transmission medium when power is wirelessly transmitted via a power receiving antenna provided to a movable body; deriving a predicted transmission characteristic by predicting a change in the characteristic of the transmission medium by using the data;
calculating a control parameter corresponding to the predicted transmission characteristic; and
performing control of the movable body and the power receiving antenna by using the control parameter.

10 . A wireless power transmission system comprising:
a movable body comprising the control device for wireless power transmission according to claim 1 and a power receiving antenna; and a power transmitting device which wirelessly transmits power to the movable body, wherein the control device for wireless power transmission determines transmission information comprising a frequency of the wireless power transmission and a target value of power transmission efficiency, and the movable body transmits the transmission information to the power transmitting device.

Assignees

• Nec Corp

Inventors

• Yoshida Shuhei
• Tanomura Masahiro
• SHIZUNO Kaoru

Classifications

• H02J50/90

  involving detection or optimisation of position, e.g. alignment · CPC title

• H02J50/80

  involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices · CPC title

• H02J50/12 Primary

  of the resonant type · CPC title

• H02J7/042

  Electricity · mapped topic

• H02J7/025

  Electricity · mapped topic