WIRELESS POWER SUPPLY APPARATUS FOR LINEAR MOTION TYPE ROBOT

• US 20150280454A1
• Filed: 03/30/2015
• Published: 10/01/2015
• Est. Priority Date: 03/28/2014
• Status: Active Grant

• Current Assignee: DENSO Corporation, Denso PS Corporation (DENSO Corporation)
• Original Assignee: DENSO Corporation, Denso PS Corporation (DENSO Corporation)
• Inventors: TAKEDA, Shigeru, SUGINO, Masayoshi, KONDO, Hiroshi
• Granted Patent: US 9,882,393 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/60 responsive to the presence of foreign objects, e.g. detection of living beings
• CPC Class Codes: H02J 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices

Abstract

A wireless power supply apparatus using magnetic resonance is provided for a linear motion type robot. In the apparatus, a high-frequency signal for foreign matter detection is generated. This signal is different in wavelength and frequency from a high-frequency signal for transmitting power between a power transmission coil and a power reception coil. The wavelength is wavelength λ and the frequency is frequency f. The power transmission coil serves as an apparent antenna of which the long side is set to λ/2. At least either of a wavelength λx or a resonance frequency fx of a resonance wave attributed to the resonance in the antenna is detected when the high-frequency signal is supplied to the antenna. Whether or not foreign matter is present on the power transmission coil is detected based on the wavelength λx or the resonance frequency fx.

Claims

1. A wireless power supply apparatus for a linear motion type robot that supplies power without contact between a pair of a power transmission coil and a power reception coil using magnetic resonance, the wireless power supply apparatus comprising:

a high-frequency signal generating means for generating a high-frequency signal for foreign matter detection having different wavelength and frequency from a high-frequency signal for transmitting power between the power transmission coil and the power reception coil, in which the wavelength is wavelength λ and

the frequency is frequency f;

an apparent antenna that is configured by the power transmission coil and of which the long side is set to λ

/2 in relation to the wavelength λ

;

a resonance wave detecting means for detecting at least either of a wavelength λ

x or a resonance frequency fx of a resonance wave attributed to resonance in the antenna when the high-frequency signal for foreign matter detection generated by the high-frequency signal generating means is supplied to the antenna; and

a foreign matter detecting means for detecting whether or not foreign matter is present on the power transmission coil based on the wavelength λ

x or the resonance frequency fx detected by the resonance wave detecting means.

2. The wireless power supply apparatus for a linear motion type robot, wherein:

the high-frequency signal for foreign matter detection is the same frequency as the frequency of a signal for controlling the linear motion type robot.